Segment disclosures

Company overview

MERCER INTERNATIONAL INC.

Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.

Revenue · Reported segment facts

78 dimension combinations 779 retained observations 14 reported periods Partial retained history

Counts describe retained dimensioned rows only. Periods and members can change across reports, and this view does not infer missing values or expected segment totals.

Intersegment Elimination · Market Pulp

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30527000 USD20260806Open filing evidence
2026-01-01 – 2026-06-301289000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31762000 USD20260507Open filing evidence
2025-01-01 – 2025-12-311083000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30331000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30840000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30165000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30509000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31344000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31842000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30323000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30594000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30111000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30271000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31160000 USD20250501Open filing evidence
2023-01-01 – 2023-12-311037000 USD20260212Open filing evidence
2023-07-01 – 2023-09-30221000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30765000 USD20241031Open filing evidence
2023-04-01 – 2023-06-30170000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30544000 USD20240808Open filing evidence

Intersegment Elimination · Solid Wood

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3013865000 USD20260806Open filing evidence
2026-01-01 – 2026-06-3026571000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3112706000 USD20260507Open filing evidence
2025-01-01 – 2025-12-3145246000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3012875000 USD20251106Open filing evidence
2025-01-01 – 2025-09-3034444000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3011548000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3021569000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3110021000 USD20260507Open filing evidence
2024-01-01 – 2024-12-3134482000 USD20260212Open filing evidence
2024-07-01 – 2024-09-307689000 USD20251106Open filing evidence
2024-01-01 – 2024-09-3026560000 USD20251106Open filing evidence
2024-04-01 – 2024-06-309149000 USD20250731Open filing evidence
2024-01-01 – 2024-06-3018871000 USD20250731Open filing evidence
2024-01-01 – 2024-03-319722000 USD20250501Open filing evidence
2023-01-01 – 2023-12-3141351000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3010267000 USD20241031Open filing evidence
2023-01-01 – 2023-09-3032408000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3010986000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3022141000 USD20240808Open filing evidence
2023-01-01 – 2023-03-3111155000 USD20240509Open filing evidence

Material Reconciling Items · Market Pulp

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:MaterialReconcilingItemsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30325601000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30671346000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31345745000 USD20260507Open filing evidence
2025-01-01 – 2025-12-311387763000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30339369000 USD20251106Open filing evidence
2025-01-01 – 2025-09-301053266000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30332473000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30713897000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31381424000 USD20260507Open filing evidence
2024-01-01 – 2024-12-311549398000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30373591000 USD20251106Open filing evidence
2024-01-01 – 2024-09-301173637000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30367482000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30800046000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31432564000 USD20250501Open filing evidence
2023-01-01 – 2023-12-311517167000 USD20260212Open filing evidence

Operating Segments · Biofuels · Solid Wood

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:BiofuelsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3111254000 USD20240509Open filing evidence
2023-01-01 – 2023-12-3140680000 USD20240215Open filing evidence
2023-01-01 – 2023-03-318135000 USD20240509Open filing evidence

Operating Segments · Energyandchemicals · Market Pulp

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:EnergyandchemicalsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3021734000 USD20260806Open filing evidence
2026-01-01 – 2026-06-3047547000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3125813000 USD20260507Open filing evidence
2025-01-01 – 2025-12-3181857000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3020416000 USD20251106Open filing evidence
2025-01-01 – 2025-09-3063135000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3018603000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3042719000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3124116000 USD20260507Open filing evidence
2024-01-01 – 2024-12-3188096000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3019092000 USD20251106Open filing evidence
2024-01-01 – 2024-09-3063764000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3020563000 USD20250731Open filing evidence
2024-01-01 – 2024-06-3044672000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3124109000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31113510000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3030751000 USD20241031Open filing evidence
2023-01-01 – 2023-09-3090015000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3028519000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3059264000 USD20240808Open filing evidence

Operating Segments · Energyandchemicals · Solid Wood

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:EnergyandchemicalsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-06-3011894000 USD20260806Open filing evidence
2025-04-01 – 2025-06-304242000 USD20260806Open filing evidence
2025-01-01 – 2025-06-309108000 USD20260806Open filing evidence
2024-01-01 – 2024-12-3116512000 USD20250220Open filing evidence
2024-07-01 – 2024-09-302593000 USD20251106Open filing evidence
2024-01-01 – 2024-09-3011732000 USD20251106Open filing evidence
2024-04-01 – 2024-06-304301000 USD20240808Open filing evidence
2024-01-01 – 2024-06-309139000 USD20250731Open filing evidence
2023-01-01 – 2023-12-3121451000 USD20260212Open filing evidence
2023-04-01 – 2023-06-305360000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3011055000 USD20240808Open filing evidence

Operating Segments · Lumber · Solid Wood

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:LumberMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3155882000 USD20240509Open filing evidence
2023-01-01 – 2023-12-31217939000 USD20240215Open filing evidence
2023-01-01 – 2023-03-3160039000 USD20240509Open filing evidence

Operating Segments · Manufactured Products · Market Pulp

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:ManufacturedProductsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-01-01 – 2025-12-310 USD20260212Open filing evidence
2025-07-01 – 2025-09-300 USD20251106Open filing evidence
2025-01-01 – 2025-09-300 USD20251106Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-01-01 – 2024-12-310 USD20260212Open filing evidence
2024-07-01 – 2024-09-300 USD20251106Open filing evidence
2024-01-01 – 2024-09-300 USD20251106Open filing evidence
2024-04-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-03-310 USD20250501Open filing evidence
2023-01-01 – 2023-12-310 USD20260212Open filing evidence
2023-07-01 – 2023-09-300 USD20241031Open filing evidence
2023-01-01 – 2023-09-300 USD20241031Open filing evidence
2023-04-01 – 2023-06-300 USD20240808Open filing evidence
2023-01-01 – 2023-06-300 USD20240808Open filing evidence

Operating Segments · Manufactured Products · Solid Wood

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:ManufacturedProductsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3116713000 USD20240509Open filing evidence
2023-01-01 – 2023-12-3158895000 USD20240215Open filing evidence
2023-01-01 – 2023-03-315804000 USD20240509Open filing evidence

Operating Segments · Pallets · Market Pulp

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:PalletsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-01-01 – 2025-12-310 USD20260212Open filing evidence
2025-07-01 – 2025-09-300 USD20251106Open filing evidence
2025-01-01 – 2025-09-300 USD20251106Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-01-01 – 2024-12-310 USD20260212Open filing evidence
2024-07-01 – 2024-09-300 USD20251106Open filing evidence
2024-01-01 – 2024-09-300 USD20251106Open filing evidence
2024-04-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-03-310 USD20250501Open filing evidence
2023-01-01 – 2023-12-310 USD20260212Open filing evidence
2023-07-01 – 2023-09-300 USD20241031Open filing evidence
2023-01-01 – 2023-09-300 USD20241031Open filing evidence
2023-04-01 – 2023-06-300 USD20240808Open filing evidence
2023-01-01 – 2023-06-300 USD20240808Open filing evidence

Operating Segments · Pallets · Solid Wood

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:PalletsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3031908000 USD20260806Open filing evidence
2026-01-01 – 2026-06-3061768000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3129860000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31100124000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3026650000 USD20251106Open filing evidence
2025-01-01 – 2025-09-3076413000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3026586000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3049763000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3123177000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31104386000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3026525000 USD20251106Open filing evidence
2024-01-01 – 2024-09-3081286000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3026741000 USD20250731Open filing evidence
2024-01-01 – 2024-06-3054761000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3128020000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31121424000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3028807000 USD20241031Open filing evidence
2023-01-01 – 2023-09-3097657000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3032675000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3068850000 USD20240808Open filing evidence
2023-01-01 – 2023-03-3136175000 USD20240509Open filing evidence

Operating Segments · Pulp · Market Pulp

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:PulpMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30303340000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30622510000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31319170000 USD20260507Open filing evidence
2025-01-01 – 2025-12-311304823000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30318622000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30989291000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30313705000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30670669000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31356964000 USD20260507Open filing evidence
2024-01-01 – 2024-12-311460460000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30354176000 USD20251106Open filing evidence
2024-01-01 – 2024-09-301109279000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30346808000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30755103000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31408295000 USD20250501Open filing evidence
2023-01-01 – 2023-12-311402620000 USD20260212Open filing evidence
2023-07-01 – 2023-09-30318102000 USD20241031Open filing evidence
2023-01-01 – 2023-09-301061933000 USD20241031Open filing evidence
2023-04-01 – 2023-06-30374175000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30743831000 USD20240808Open filing evidence

Operating Segments · Pulp · Solid Wood

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:PulpMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-01-01 – 2025-12-310 USD20260212Open filing evidence
2025-07-01 – 2025-09-300 USD20251106Open filing evidence
2025-01-01 – 2025-09-300 USD20251106Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-01-01 – 2024-12-310 USD20260212Open filing evidence
2024-07-01 – 2024-09-300 USD20251106Open filing evidence
2024-01-01 – 2024-09-300 USD20251106Open filing evidence
2024-04-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-03-310 USD20250501Open filing evidence
2023-01-01 – 2023-12-310 USD20260212Open filing evidence
2023-07-01 – 2023-09-300 USD20241031Open filing evidence
2023-01-01 – 2023-09-300 USD20241031Open filing evidence
2023-04-01 – 2023-06-300 USD20240808Open filing evidence
2023-01-01 – 2023-06-300 USD20240808Open filing evidence

Operating Segments · Wood Residuals · Market Pulp

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:WoodResidualsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-06-300 USD20250731Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-01-01 – 2024-12-310 USD20260212Open filing evidence
2024-07-01 – 2024-09-300 USD20241031Open filing evidence
2024-01-01 – 2024-09-300 USD20241031Open filing evidence
2024-04-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-06-300 USD20240808Open filing evidence
2023-07-01 – 2023-09-300 USD20241031Open filing evidence
2023-04-01 – 2023-06-300 USD20240808Open filing evidence
2023-01-01 – 2023-06-300 USD20240808Open filing evidence

Operating Segments · Wood Residuals · Solid Wood

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:WoodResidualsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-06-305783000 USD20260806Open filing evidence
2025-01-01 – 2025-09-306203000 USD20251106Open filing evidence
2025-04-01 – 2025-06-302595000 USD20260806Open filing evidence
2025-01-01 – 2025-03-311243000 USD20260507Open filing evidence
2024-01-01 – 2024-12-316975000 USD20260212Open filing evidence
2024-07-01 – 2024-09-301822000 USD20241031Open filing evidence
2024-01-01 – 2024-09-305888000 USD20251106Open filing evidence
2024-04-01 – 2024-06-301750000 USD20240808Open filing evidence
2024-01-01 – 2024-06-304066000 USD20250731Open filing evidence
2024-01-01 – 2024-03-312316000 USD20250501Open filing evidence
2023-01-01 – 2023-12-3111665000 USD20260212Open filing evidence
2023-04-01 – 2023-06-302520000 USD20240808Open filing evidence
2023-01-01 – 2023-06-307686000 USD20240808Open filing evidence

Operating Segments · CN · Market Pulp

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CN;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30114884000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30270487000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31155603000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31547697000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30137506000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30405487000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30130411000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30267981000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31137570000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31574264000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30143711000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30425857000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3099347000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30282146000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31182799000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31551945000 USD20260212Open filing evidence
2023-07-01 – 2023-09-30128335000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30399527000 USD20241031Open filing evidence
2023-04-01 – 2023-06-30164070000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30271192000 USD20240808Open filing evidence

Operating Segments · CN · Solid Wood

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CN;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30106000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30510000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31404000 USD20260507Open filing evidence
2025-01-01 – 2025-12-311672000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30410000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30916000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30113000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30506000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31393000 USD20260507Open filing evidence
2024-01-01 – 2024-12-312488000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30511000 USD20251106Open filing evidence
2024-01-01 – 2024-09-301710000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30390000 USD20250731Open filing evidence
2024-01-01 – 2024-06-301199000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31809000 USD20250501Open filing evidence
2023-01-01 – 2023-12-312981000 USD20260212Open filing evidence
2023-07-01 – 2023-09-30400000 USD20241031Open filing evidence
2023-01-01 – 2023-09-302404000 USD20241031Open filing evidence
2023-04-01 – 2023-06-30790000 USD20240808Open filing evidence
2023-01-01 – 2023-06-302004000 USD20240808Open filing evidence
2023-01-01 – 2023-03-311214000 USD20240509Open filing evidence

Operating Segments · US · Solid Wood

Consolidation Items · Statement Geographical · Statement Business Segments

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2023-01-01 – 2023-12-31169883000 USD20240215Open filing evidence
2023-01-01 – 2023-03-3135056000 USD20240509Open filing evidence

Operating Segments · Foreign Countries · Solid Wood

Consolidation Items · Statement Geographical · Statement Business Segments

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2024-01-01 – 2024-03-3174828000 USD20240509Open filing evidence
2023-01-01 – 2023-12-31302171000 USD20240215Open filing evidence
2023-01-01 – 2023-03-3185958000 USD20240509Open filing evidence

Operating Segments · Other Countries · Market Pulp

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=merc:OtherCountriesMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
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2026-01-01 – 2026-06-30190364000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3182219000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31416577000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30100294000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30330085000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30102187000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30229791000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31127604000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31488878000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30107816000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30377092000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30136784000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30269276000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31132492000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31490682000 USD20260212Open filing evidence
2023-07-01 – 2023-09-30105689000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30381261000 USD20241031Open filing evidence
2023-04-01 – 2023-06-30128841000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30275572000 USD20240808Open filing evidence

Operating Segments · Other Countries · Solid Wood

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=merc:OtherCountriesMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3119943000 USD20240509Open filing evidence
2023-01-01 – 2023-12-3174449000 USD20240215Open filing evidence
2023-01-01 – 2023-03-3119136000 USD20240509Open filing evidence

Operating Segments · Market Pulp

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30325074000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30670057000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31344983000 USD20260507Open filing evidence
2025-01-01 – 2025-12-311386680000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30339038000 USD20251106Open filing evidence
2025-01-01 – 2025-09-301052426000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30332308000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30713388000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31381080000 USD20260507Open filing evidence
2024-01-01 – 2024-12-311548556000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30373268000 USD20251106Open filing evidence
2024-01-01 – 2024-09-301173043000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30367371000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30799775000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31432404000 USD20250501Open filing evidence
2023-01-01 – 2023-12-311516130000 USD20260212Open filing evidence
2023-07-01 – 2023-09-30381080000 RestatedUSD20250501Open filing evidence
2023-01-01 – 2023-09-301151948000 USD20241031Open filing evidence
2023-04-01 – 2023-06-30402694000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30803095000 USD20240808Open filing evidence

Operating Segments · Market Pulp · Lumber

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ProductOrServiceAxis=merc:LumberMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-01-01 – 2025-12-310 USD20260212Open filing evidence
2025-07-01 – 2025-09-300 USD20251106Open filing evidence
2025-01-01 – 2025-09-300 USD20251106Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-01-01 – 2024-12-310 USD20260212Open filing evidence
2024-07-01 – 2024-09-300 USD20251106Open filing evidence
2024-01-01 – 2024-09-300 USD20251106Open filing evidence
2024-04-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-03-310 USD20250501Open filing evidence
2023-01-01 – 2023-12-310 USD20260212Open filing evidence
2023-07-01 – 2023-09-300 USD20241031Open filing evidence
2023-01-01 – 2023-09-300 USD20241031Open filing evidence
2023-04-01 – 2023-06-300 USD20240808Open filing evidence
2023-01-01 – 2023-06-300 USD20240808Open filing evidence

Operating Segments · Market Pulp · US

Consolidation Items · Statement Business Segments · Statement Geographical

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3031872000 USD20260806Open filing evidence
2026-01-01 – 2026-06-3067866000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3135994000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31141946000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3032095000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30103122000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3032179000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3071027000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3138848000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31151053000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3038706000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30122317000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3046022000 USD20250731Open filing evidence
2024-01-01 – 2024-06-3083611000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3137589000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31123818000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3026836000 USD20241031Open filing evidence
2023-01-01 – 2023-09-3099478000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3029087000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3072642000 USD20240808Open filing evidence

Operating Segments · Solid Wood

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30134203000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30265945000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31131742000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31467438000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30117234000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30357222000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30117268000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30239988000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31122720000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31485991000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30125093000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30374354000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30130238000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30249261000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31119023000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31472054000 USD20260212Open filing evidence
2023-07-01 – 2023-09-30119547000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30366611000 USD20241031Open filing evidence
2023-04-01 – 2023-06-30126050000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30247064000 USD20240808Open filing evidence
2023-01-01 – 2023-03-31121014000 USD20240509Open filing evidence

Operating Segments · Solid Wood · Biofuels

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ProductOrServiceAxis=merc:BiofuelsMember
PeriodValueUnitFiledEvidence
2023-01-01 – 2023-09-3029764000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3010242000 USD20230804Open filing evidence

Operating Segments · Solid Wood · Energyandchemicals

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ProductOrServiceAxis=merc:EnergyandchemicalsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-306296000 USD20260806Open filing evidence
2026-01-01 – 2026-03-315598000 USD20260507Open filing evidence
2025-01-01 – 2025-12-3118992000 USD20260212Open filing evidence
2025-07-01 – 2025-09-304894000 USD20251106Open filing evidence
2025-01-01 – 2025-09-3014002000 USD20251106Open filing evidence
2025-01-01 – 2025-03-314866000 USD20260507Open filing evidence
2024-01-01 – 2024-12-3116512000 USD20260212Open filing evidence
2024-07-01 – 2024-09-302593000 USD20241031Open filing evidence
2024-01-01 – 2024-09-3011732000 USD20241031Open filing evidence
2024-04-01 – 2024-06-304301000 USD20250731Open filing evidence
2024-01-01 – 2024-03-314838000 USD20250501Open filing evidence
2023-01-01 – 2023-12-3121451000 USD20240215Open filing evidence
2023-07-01 – 2023-09-305468000 USD20241031Open filing evidence
2023-01-01 – 2023-09-3016523000 USD20241031Open filing evidence
2023-01-01 – 2023-06-3011055000 USD20230804Open filing evidence
2023-01-01 – 2023-03-315695000 USD20240509Open filing evidence

Operating Segments · Solid Wood · Lumber

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ProductOrServiceAxis=merc:LumberMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3056643000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30116734000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3160091000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31247572000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3060971000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30192689000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3066332000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30131718000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3165386000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31217471000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3049093000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30158885000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3053910000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30109792000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3155882000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31217939000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3050815000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30170118000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3059264000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30119303000 USD20240808Open filing evidence

Operating Segments · Solid Wood · Manufactured Products

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ProductOrServiceAxis=merc:ManufacturedProductsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3025821000 USD20260806Open filing evidence
2026-01-01 – 2026-06-3046862000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3121041000 USD20260507Open filing evidence
2025-01-01 – 2025-12-3157470000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3012171000 USD20251106Open filing evidence
2025-01-01 – 2025-09-3043413000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3012418000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3031242000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3118824000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31100565000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3035798000 USD20251106Open filing evidence
2024-01-01 – 2024-09-3087892000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3035381000 USD20250731Open filing evidence
2024-01-01 – 2024-06-3052094000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3116713000 USD20250501Open filing evidence
2023-01-01 – 2023-12-3158895000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3020850000 USD20241031Open filing evidence
2023-01-01 – 2023-09-3042643000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3015989000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3021793000 USD20240808Open filing evidence

Operating Segments · Solid Wood · Pallets

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ProductOrServiceAxis=merc:PalletsMember
PeriodValueUnitFiledEvidence
2023-01-01 – 2023-09-3097657000 USD20231102Open filing evidence
2023-01-01 – 2023-06-3068850000 USD20230804Open filing evidence

Operating Segments · Solid Wood · Pulp

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ProductOrServiceAxis=merc:PulpMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-300 USD20230804Open filing evidence
2023-01-01 – 2023-06-300 USD20230804Open filing evidence

Operating Segments · Solid Wood · Wood Residuals

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ProductOrServiceAxis=merc:WoodResidualsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-312316000 USD20240509Open filing evidence
2023-01-01 – 2023-12-3111665000 USD20240215Open filing evidence
2023-01-01 – 2023-03-315166000 USD20240509Open filing evidence

Operating Segments · Solid Wood · DE

Consolidation Items · Statement Business Segments · Statement Geographical

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:StatementGeographicalAxis=country:DE
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-3058676000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30124284000 USD20230804Open filing evidence
2023-01-01 – 2023-03-3165608000 USD20230504Open filing evidence

Operating Segments · Solid Wood · US

Consolidation Items · Statement Business Segments · Statement Geographical

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3044294000 USD20260806Open filing evidence
2026-01-01 – 2026-06-3086336000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3142042000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31155311000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3035107000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30122692000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3040275000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3087585000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3147310000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31194880000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3056766000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30158094000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3057133000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30101328000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3144195000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31169883000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3048300000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30131520000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3048164000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3083220000 USD20240808Open filing evidence
2023-01-01 – 2023-03-3135056000 USD20230504Open filing evidence

Operating Segments · Solid Wood · Other Countries

Consolidation Items · Statement Business Segments · Statement Geographical

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:StatementGeographicalAxis=merc:OtherCountriesMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3031918000 USD20260806Open filing evidence
2026-01-01 – 2026-06-3063108000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3131190000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31116762000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3030045000 USD20251106Open filing evidence
2025-01-01 – 2025-09-3088285000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3029852000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3058240000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3128388000 USD20260507Open filing evidence
2024-01-01 – 2024-12-3192756000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3021206000 USD20251106Open filing evidence
2024-01-01 – 2024-09-3065565000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3024416000 USD20250731Open filing evidence
2024-01-01 – 2024-06-3044359000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3119943000 USD20250501Open filing evidence
2023-01-01 – 2023-12-3174449000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3018009000 USD20241031Open filing evidence
2023-01-01 – 2023-09-3055565000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3018420000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3037556000 USD20240808Open filing evidence
2023-01-01 – 2023-03-3119136000 USD20230504Open filing evidence

Biofuels · Operating Segments · Market Pulp

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=merc:BiofuelsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-01-01 – 2025-12-310 USD20260212Open filing evidence
2025-07-01 – 2025-09-300 USD20251106Open filing evidence
2025-01-01 – 2025-09-300 USD20251106Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-01-01 – 2024-12-310 USD20260212Open filing evidence
2024-07-01 – 2024-09-300 USD20251106Open filing evidence
2024-01-01 – 2024-09-300 USD20251106Open filing evidence
2024-04-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-03-310 USD20250501Open filing evidence
2023-01-01 – 2023-12-310 USD20260212Open filing evidence
2023-07-01 – 2023-09-300 USD20241031Open filing evidence
2023-01-01 – 2023-09-300 USD20241031Open filing evidence
2023-04-01 – 2023-06-300 USD20240808Open filing evidence
2023-01-01 – 2023-06-300 USD20240808Open filing evidence

Biofuels · Operating Segments · Solid Wood

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=merc:BiofuelsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3010724000 USD20260806Open filing evidence
2026-01-01 – 2026-06-3022904000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3112180000 USD20260507Open filing evidence
2025-01-01 – 2025-12-3134454000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3010183000 USD20251106Open filing evidence
2025-01-01 – 2025-09-3024502000 USD20251106Open filing evidence
2025-04-01 – 2025-06-305095000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3014319000 USD20260806Open filing evidence
2025-01-01 – 2025-03-319224000 USD20260507Open filing evidence
2024-01-01 – 2024-12-3140082000 USD20260212Open filing evidence
2024-07-01 – 2024-09-309262000 USD20251106Open filing evidence
2024-01-01 – 2024-09-3028671000 USD20251106Open filing evidence
2024-04-01 – 2024-06-308155000 USD20250731Open filing evidence
2024-01-01 – 2024-06-3019409000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3111254000 USD20250501Open filing evidence
2023-01-01 – 2023-12-3140680000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3011387000 USD20241031Open filing evidence
2023-01-01 – 2023-09-3029764000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3010242000 USD20240808Open filing evidence
2023-01-01 – 2023-06-3018377000 USD20240808Open filing evidence

Pulp · Operating Segments · Solid Wood

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=merc:PulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20240509Open filing evidence
2023-01-01 – 2023-12-310 USD20240215Open filing evidence
2023-01-01 – 2023-03-310 USD20240509Open filing evidence

Wood Residuals · Operating Segments · Market Pulp

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=merc:WoodResidualsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2025-01-01 – 2025-12-310 USD20260212Open filing evidence
2025-07-01 – 2025-09-300 USD20251106Open filing evidence
2025-01-01 – 2025-09-300 USD20251106Open filing evidence
2025-04-01 – 2025-06-300 USD20250731Open filing evidence
2025-01-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-03-310 USD20250501Open filing evidence
2024-01-01 – 2024-12-310 USD20250220Open filing evidence
2024-07-01 – 2024-09-300 USD20251106Open filing evidence
2024-01-01 – 2024-09-300 USD20251106Open filing evidence
2024-04-01 – 2024-06-300 USD20240808Open filing evidence
2024-01-01 – 2024-06-300 USD20250731Open filing evidence
2024-01-01 – 2024-03-310 USD20250501Open filing evidence
2023-01-01 – 2023-12-310 USD20260212Open filing evidence
2023-01-01 – 2023-09-300 USD20241031Open filing evidence

Wood Residuals · Operating Segments · Solid Wood

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=merc:WoodResidualsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-302811000 USD20260806Open filing evidence
2026-01-01 – 2026-03-312972000 USD20260507Open filing evidence
2025-01-01 – 2025-12-318826000 USD20260212Open filing evidence
2025-07-01 – 2025-09-302365000 USD20251106Open filing evidence
2025-04-01 – 2025-06-302595000 USD20250731Open filing evidence
2025-01-01 – 2025-06-303838000 USD20260806Open filing evidence
2025-01-01 – 2025-03-311243000 USD20250501Open filing evidence
2024-01-01 – 2024-12-316975000 USD20250220Open filing evidence
2024-07-01 – 2024-09-301822000 USD20251106Open filing evidence
2024-04-01 – 2024-06-301750000 USD20250731Open filing evidence
2024-01-01 – 2024-06-304066000 USD20240808Open filing evidence
2023-07-01 – 2023-09-302220000 USD20241031Open filing evidence
2023-01-01 – 2023-09-309906000 USD20241031Open filing evidence
2023-01-01 – 2023-06-307686000 USD20230804Open filing evidence
2023-01-01 – 2023-03-315166000 USD20230504Open filing evidence

Wood Residuals · Market Pulp · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=merc:WoodResidualsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-300 USD20231102Open filing evidence
2023-04-01 – 2023-06-300 USD20230804Open filing evidence
2023-01-01 – 2023-03-310 USD20230504Open filing evidence

Wood Residuals · Solid Wood · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=merc:WoodResidualsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-302220000 USD20231102Open filing evidence
2023-04-01 – 2023-06-302520000 USD20230804Open filing evidence

DE · Operating Segments · Market Pulp

Statement Geographical · Consolidation Items · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=country:DE;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3070173000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30141340000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3171167000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31280460000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3069143000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30213732000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3067531000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30144589000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3177058000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31334361000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3083035000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30247777000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3085218000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30164742000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3179524000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31349685000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3087993000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30271682000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3080696000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30183689000 USD20240808Open filing evidence

DE · Operating Segments · Solid Wood

Statement Geographical · Consolidation Items · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=country:DE;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3057885000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30115991000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3158106000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31193693000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3051672000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30145329000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3047028000 USD20260806Open filing evidence
2025-01-01 – 2025-06-3093657000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3146629000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31195867000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3046610000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30148985000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3048299000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30102375000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3154076000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31224741000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3052838000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30177122000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3058676000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30124284000 USD20240808Open filing evidence
2023-01-01 – 2023-03-3165608000 USD20240509Open filing evidence

DE · Market Pulp · Operating Segments

Statement Geographical · Statement Business Segments · Consolidation Items

Source dimensions srt:StatementGeographicalAxis=country:DE;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-01-01 – 2023-03-31102993000 USD20240509Open filing evidence

Foreign Countries · Operating Segments · Market Pulp

Statement Geographical · Consolidation Items · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=merc:ForeignCountriesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30293202000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30602191000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31308989000 USD20260507Open filing evidence
2025-01-01 – 2025-12-311244734000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30306943000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30949304000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30300129000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30642361000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31342232000 USD20260507Open filing evidence
2024-01-01 – 2024-12-311397503000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30334562000 USD20251106Open filing evidence
2024-01-01 – 2024-09-301050726000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30321349000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30716164000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31394815000 USD20250501Open filing evidence
2023-01-01 – 2023-12-311392312000 USD20260212Open filing evidence
2023-07-01 – 2023-09-30322017000 USD20241031Open filing evidence
2023-01-01 – 2023-09-301052470000 USD20241031Open filing evidence
2023-04-01 – 2023-06-30373607000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30730453000 USD20240808Open filing evidence

Foreign Countries · Operating Segments · Solid Wood

Statement Geographical · Consolidation Items · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=merc:ForeignCountriesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3089909000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30179609000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3189700000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31312127000 USD20260212Open filing evidence
2025-07-01 – 2025-09-3082127000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30234530000 USD20251106Open filing evidence
2025-04-01 – 2025-06-3076993000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30152403000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3175410000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31291111000 USD20260212Open filing evidence
2024-07-01 – 2024-09-3068327000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30216260000 USD20251106Open filing evidence
2024-04-01 – 2024-06-3073105000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30147933000 USD20250731Open filing evidence
2024-01-01 – 2024-03-3174828000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31302171000 USD20260212Open filing evidence
2023-07-01 – 2023-09-3071247000 USD20241031Open filing evidence
2023-01-01 – 2023-09-30235091000 USD20241031Open filing evidence
2023-04-01 – 2023-06-3077886000 USD20240808Open filing evidence
2023-01-01 – 2023-06-30163844000 USD20240808Open filing evidence

Market Pulp · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31160000 USD20240509Open filing evidence
2023-01-01 – 2023-12-311037000 USD20240215Open filing evidence
2023-07-01 – 2023-09-30221000 USD20231102Open filing evidence
2023-01-01 – 2023-09-30765000 USD20231102Open filing evidence
2023-04-01 – 2023-06-30170000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30544000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31374000 USD20240509Open filing evidence

Market Pulp · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31432404000 USD20240509Open filing evidence
2023-01-01 – 2023-12-311516130000 USD20240215Open filing evidence
2023-07-01 – 2023-09-30348853000 USD20231102Open filing evidence
2023-01-01 – 2023-09-301151948000 USD20231102Open filing evidence
2023-04-01 – 2023-06-30402694000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30803095000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31400401000 USD20240509Open filing evidence

Market Pulp · Operating Segments · Biofuels

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:BiofuelsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20240509Open filing evidence
2023-01-01 – 2023-12-310 USD20240215Open filing evidence
2023-07-01 – 2023-09-300 USD20231102Open filing evidence
2023-01-01 – 2023-09-300 USD20231102Open filing evidence
2023-04-01 – 2023-06-300 USD20230804Open filing evidence
2023-01-01 – 2023-06-300 USD20230804Open filing evidence
2023-01-01 – 2023-03-310 USD20240509Open filing evidence

Market Pulp · Operating Segments · Energyandchemicals

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:EnergyandchemicalsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3124109000 USD20240509Open filing evidence
2023-01-01 – 2023-12-31113510000 USD20240215Open filing evidence
2023-07-01 – 2023-09-3030751000 USD20231102Open filing evidence
2023-01-01 – 2023-09-3090015000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3028519000 USD20230804Open filing evidence
2023-01-01 – 2023-06-3059264000 USD20230804Open filing evidence
2023-01-01 – 2023-03-3130745000 USD20240509Open filing evidence

Market Pulp · Operating Segments · Lumber

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:LumberMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20240509Open filing evidence
2023-01-01 – 2023-12-310 USD20240215Open filing evidence
2023-07-01 – 2023-09-300 USD20231102Open filing evidence
2023-01-01 – 2023-09-300 USD20231102Open filing evidence
2023-04-01 – 2023-06-300 USD20230804Open filing evidence
2023-01-01 – 2023-06-300 USD20230804Open filing evidence

Market Pulp · Operating Segments · Manufactured Products

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:ManufacturedProductsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20240509Open filing evidence
2023-01-01 – 2023-12-310 USD20240215Open filing evidence
2023-07-01 – 2023-09-300 USD20231102Open filing evidence
2023-01-01 – 2023-09-300 USD20231102Open filing evidence
2023-04-01 – 2023-06-300 USD20230804Open filing evidence
2023-01-01 – 2023-06-300 USD20230804Open filing evidence

Market Pulp · Operating Segments · Pallets

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:PalletsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20240509Open filing evidence
2023-01-01 – 2023-12-310 USD20240215Open filing evidence
2023-07-01 – 2023-09-300 USD20231102Open filing evidence
2023-01-01 – 2023-09-300 USD20231102Open filing evidence
2023-04-01 – 2023-06-300 USD20230804Open filing evidence
2023-01-01 – 2023-06-300 USD20230804Open filing evidence

Market Pulp · Operating Segments · Pulp

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:PulpMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-30318102000 USD20231102Open filing evidence
2023-01-01 – 2023-09-301061933000 USD20231102Open filing evidence
2023-04-01 – 2023-06-30374175000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30743831000 USD20230804Open filing evidence

Market Pulp · Operating Segments · Wood Residuals

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:WoodResidualsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20240509Open filing evidence
2023-01-01 – 2023-12-310 USD20240215Open filing evidence

Market Pulp · Operating Segments · CN

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CN
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31182799000 USD20240509Open filing evidence
2023-01-01 – 2023-12-31551945000 USD20240215Open filing evidence
2023-07-01 – 2023-09-30128335000 USD20231102Open filing evidence
2023-01-01 – 2023-09-30399527000 USD20231102Open filing evidence
2023-04-01 – 2023-06-30164070000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30271192000 USD20230804Open filing evidence

Market Pulp · Operating Segments · DE

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:DE
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3087993000 USD20231102Open filing evidence
2023-01-01 – 2023-09-30271682000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3080696000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30183689000 USD20230804Open filing evidence

Market Pulp · Operating Segments · US

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3137589000 USD20240509Open filing evidence
2023-01-01 – 2023-12-31123818000 USD20240215Open filing evidence
2023-07-01 – 2023-09-3026836000 USD20231102Open filing evidence
2023-01-01 – 2023-09-3099478000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3029087000 USD20230804Open filing evidence
2023-01-01 – 2023-06-3072642000 USD20230804Open filing evidence

Market Pulp · Operating Segments · Foreign Countries

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=merc:ForeignCountriesMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31394815000 USD20240509Open filing evidence
2023-01-01 – 2023-12-311392312000 USD20240215Open filing evidence
2023-07-01 – 2023-09-30322017000 USD20231102Open filing evidence
2023-01-01 – 2023-09-301052470000 USD20231102Open filing evidence
2023-04-01 – 2023-06-30373607000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30730453000 USD20230804Open filing evidence

Market Pulp · Operating Segments · Other Countries

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=merc:OtherCountriesMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31132492000 USD20240509Open filing evidence
2023-01-01 – 2023-12-31490682000 USD20240215Open filing evidence
2023-07-01 – 2023-09-30105689000 USD20231102Open filing evidence
2023-01-01 – 2023-09-30381261000 USD20231102Open filing evidence
2023-04-01 – 2023-06-30128841000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30275572000 USD20230804Open filing evidence

Market Pulp · Pulp · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ProductOrServiceAxis=merc:PulpMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31408295000 USD20240509Open filing evidence
2023-01-01 – 2023-12-311402620000 USD20240215Open filing evidence

Market Pulp · Wood Residuals · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:ProductOrServiceAxis=merc:WoodResidualsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-01-01 – 2023-09-300 USD20231102Open filing evidence
2023-01-01 – 2023-06-300 USD20230804Open filing evidence

Market Pulp · DE · Operating Segments

Statement Business Segments · Statement Geographical · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:MarketPulpMember;srt:StatementGeographicalAxis=country:DE;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3179524000 USD20240509Open filing evidence
2023-01-01 – 2023-12-31349685000 USD20240215Open filing evidence

Solid Wood · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3010267000 USD20231102Open filing evidence
2023-01-01 – 2023-09-3032408000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3010986000 USD20230804Open filing evidence
2023-01-01 – 2023-06-3022141000 USD20230804Open filing evidence

Solid Wood · Material Reconciling Items

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:MaterialReconcilingItemsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30148068000 USD20260806Open filing evidence
2026-01-01 – 2026-06-30292516000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31144448000 USD20260507Open filing evidence
2025-01-01 – 2025-12-31512684000 USD20260212Open filing evidence
2025-07-01 – 2025-09-30130109000 USD20251106Open filing evidence
2025-01-01 – 2025-09-30391666000 USD20251106Open filing evidence
2025-04-01 – 2025-06-30128816000 USD20260806Open filing evidence
2025-01-01 – 2025-06-30261557000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31132741000 USD20260507Open filing evidence
2024-01-01 – 2024-12-31520473000 USD20260212Open filing evidence
2024-07-01 – 2024-09-30132782000 USD20251106Open filing evidence
2024-01-01 – 2024-09-30400914000 USD20251106Open filing evidence
2024-04-01 – 2024-06-30139387000 USD20250731Open filing evidence
2024-01-01 – 2024-06-30268132000 USD20250731Open filing evidence
2024-01-01 – 2024-03-31128745000 USD20250501Open filing evidence
2023-01-01 – 2023-12-31513405000 USD20260212Open filing evidence

Solid Wood · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-30126050000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30247064000 USD20230804Open filing evidence

Solid Wood · Operating Segments · Biofuels

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:BiofuelsMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3011387000 USD20231102Open filing evidence
2023-01-01 – 2023-06-3018377000 USD20230804Open filing evidence

Solid Wood · Operating Segments · Energyandchemicals

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:EnergyandchemicalsMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-305360000 USD20230804Open filing evidence

Solid Wood · Operating Segments · Lumber

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:LumberMember
PeriodValueUnitFiledEvidence
2023-01-01 – 2023-06-30119303000 USD20230804Open filing evidence

Solid Wood · Operating Segments · Manufactured Products

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:ManufacturedProductsMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3020850000 USD20231102Open filing evidence
2023-01-01 – 2023-09-3042643000 USD20231102Open filing evidence
2023-01-01 – 2023-06-3021793000 USD20230804Open filing evidence

Solid Wood · Operating Segments · Pallets

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:PalletsMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3028807000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3032675000 USD20230804Open filing evidence

Solid Wood · Operating Segments · Pulp

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=merc:PulpMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-300 USD20231102Open filing evidence
2023-01-01 – 2023-09-300 USD20231102Open filing evidence

Solid Wood · Operating Segments · CN

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CN
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-30400000 USD20231102Open filing evidence
2023-01-01 – 2023-09-302404000 USD20231102Open filing evidence
2023-04-01 – 2023-06-30790000 USD20230804Open filing evidence
2023-01-01 – 2023-06-302004000 USD20230804Open filing evidence

Solid Wood · Operating Segments · DE

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:DE
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3052838000 USD20231102Open filing evidence
2023-01-01 – 2023-09-30177122000 USD20231102Open filing evidence

Solid Wood · Operating Segments · US

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3048300000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3048164000 USD20230804Open filing evidence

Solid Wood · Operating Segments · Foreign Countries

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=merc:ForeignCountriesMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3071247000 USD20231102Open filing evidence
2023-01-01 – 2023-09-30235091000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3077886000 USD20230804Open filing evidence
2023-01-01 – 2023-06-30163844000 USD20230804Open filing evidence

Solid Wood · Operating Segments · Other Countries

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=merc:SolidWoodMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=merc:OtherCountriesMember
PeriodValueUnitFiledEvidence
2023-07-01 – 2023-09-3018009000 USD20231102Open filing evidence
2023-01-01 – 2023-09-3055565000 USD20231102Open filing evidence
2023-04-01 – 2023-06-3018420000 USD20230804Open filing evidence