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Segment and Geographic Information - Schedule of Financial and Other Information by Business Unit (Detail) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]                      
Net sales $ 436,261,000us-gaap_SalesRevenueGoodsNet $ 465,092,000us-gaap_SalesRevenueGoodsNet $ 445,341,000us-gaap_SalesRevenueGoodsNet $ 455,721,000us-gaap_SalesRevenueGoodsNet $ 434,811,000us-gaap_SalesRevenueGoodsNet $ 456,648,000us-gaap_SalesRevenueGoodsNet $ 425,967,000us-gaap_SalesRevenueGoodsNet $ 405,189,000us-gaap_SalesRevenueGoodsNet $ 1,802,415,000us-gaap_SalesRevenueGoodsNet $ 1,722,615,000us-gaap_SalesRevenueGoodsNet $ 1,577,788,000us-gaap_SalesRevenueGoodsNet
Energy and related sales, net                 7,927,000glt_EnergyAndRelatedSalesNet 3,153,000glt_EnergyAndRelatedSalesNet 7,000,000glt_EnergyAndRelatedSalesNet
Total revenue                 1,810,342,000us-gaap_SalesRevenueNet 1,725,768,000us-gaap_SalesRevenueNet 1,584,788,000us-gaap_SalesRevenueNet
Cost of products sold                 1,575,188,000us-gaap_CostOfGoodsSold 1,507,108,000us-gaap_CostOfGoodsSold 1,371,139,000us-gaap_CostOfGoodsSold
Gross profit 58,164,000us-gaap_GrossProfit 80,513,000us-gaap_GrossProfit 41,437,000us-gaap_GrossProfit 55,040,000us-gaap_GrossProfit 54,406,000us-gaap_GrossProfit 66,039,000us-gaap_GrossProfit 40,840,000us-gaap_GrossProfit 57,375,000us-gaap_GrossProfit 235,154,000us-gaap_GrossProfit 218,660,000us-gaap_GrossProfit 213,649,000us-gaap_GrossProfit
SG&A                 133,235,000us-gaap_SellingGeneralAndAdministrativeExpense 133,867,000us-gaap_SellingGeneralAndAdministrativeExpense 121,590,000us-gaap_SellingGeneralAndAdministrativeExpense
Gains on dispositions of plant, equipment and timberlands, net                 (4,861,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment (1,726,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment (9,815,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Total operating income (loss)                 106,780,000us-gaap_OperatingIncomeLoss 86,519,000us-gaap_OperatingIncomeLoss 101,874,000us-gaap_OperatingIncomeLoss
Non-operating expense                 (19,397,000)us-gaap_NonoperatingIncomeExpense (17,318,000)us-gaap_NonoperatingIncomeExpense (22,933,000)us-gaap_NonoperatingIncomeExpense
Income (loss) before income taxes                 87,383,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 69,201,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 78,941,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Supplementary Data                      
Plant, equipment and timberlands, net 697,608,000us-gaap_PropertyPlantAndEquipmentNet       723,340,000us-gaap_PropertyPlantAndEquipmentNet       697,608,000us-gaap_PropertyPlantAndEquipmentNet 723,340,000us-gaap_PropertyPlantAndEquipmentNet 621,200,000us-gaap_PropertyPlantAndEquipmentNet
Depreciation, depletion and amortization                 70,555,000us-gaap_DepreciationDepletionAndAmortization 68,196,000us-gaap_DepreciationDepletionAndAmortization 69,500,000us-gaap_DepreciationDepletionAndAmortization
Capital expenditures                 66,000,000us-gaap_PaymentsToAcquireProductiveAssets 103,000,000us-gaap_PaymentsToAcquireProductiveAssets 58,800,000us-gaap_PaymentsToAcquireProductiveAssets
Composite Fibers [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 617,851,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
566,360,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
436,740,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Total revenue                 617,900,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
566,400,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
436,700,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Cost of products sold                 498,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
456,500,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
362,600,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Gross profit                 119,900,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
109,800,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
74,200,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
SG&A                 51,600,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
47,400,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
38,100,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Total operating income (loss)                 68,300,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
62,400,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
36,100,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Income (loss) before income taxes                 68,300,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
62,400,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
36,100,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Supplementary Data                      
Plant, equipment and timberlands, net 277,800,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
      300,000,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
      277,800,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
300,000,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
200,100,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Depreciation, depletion and amortization                 29,700,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
24,800,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
23,500,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Capital expenditures                 23,900,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
56,900,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
31,400,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_CompositeFibersMember
Advanced Airlaid Materials [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 281,673,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
268,396,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
246,282,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Total revenue                 281,700,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
268,400,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
246,300,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Cost of products sold                 247,600,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
238,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
218,700,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Gross profit                 34,100,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
30,400,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
27,600,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
SG&A                 8,800,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
8,900,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
9,600,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Total operating income (loss)                 25,300,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
21,500,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
18,000,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Income (loss) before income taxes                 25,300,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
21,500,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
18,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Supplementary Data                      
Plant, equipment and timberlands, net 163,600,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
      175,100,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
      163,600,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
175,100,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
172,900,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Depreciation, depletion and amortization                 9,100,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
8,900,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
8,700,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Capital expenditures                 7,600,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
6,700,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
3,900,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_AdvancedAirlaidMaterialsMember
Specialty Papers [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 902,891,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
887,859,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
894,777,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Energy and related sales, net                 7,900,000glt_EnergyAndRelatedSalesNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
3,200,000glt_EnergyAndRelatedSalesNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
7,000,000glt_EnergyAndRelatedSalesNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Total revenue                 910,800,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
891,000,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
901,800,000us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Cost of products sold                 821,800,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
799,300,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
779,500,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Gross profit                 89,000,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
91,700,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
122,300,000us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
SG&A                 50,400,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
52,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
55,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Total operating income (loss)                 38,600,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
39,700,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
67,300,000us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Income (loss) before income taxes                 38,600,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
39,700,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
67,300,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Supplementary Data                      
Plant, equipment and timberlands, net 250,100,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
      242,600,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
      250,100,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
242,600,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
247,900,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Depreciation, depletion and amortization                 29,900,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
33,200,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
37,400,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Capital expenditures                 32,100,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
34,300,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
23,100,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= glt_SpecialtyPapersMember
Other and Unallocated [Member]                      
Segment Reporting Information [Line Items]                      
Cost of products sold                 7,800,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
13,300,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
10,300,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Gross profit                 (7,800,000)us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(13,300,000)us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(10,400,000)us-gaap_GrossProfit
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
SG&A                 22,400,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
25,500,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
18,900,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Gains on dispositions of plant, equipment and timberlands, net                 (4,900,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(1,700,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(9,800,000)us-gaap_GainLossOnSaleOfPropertyPlantEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Total operating income (loss)                 (25,300,000)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(37,100,000)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(19,500,000)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Non-operating expense                 (19,400,000)us-gaap_NonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(17,300,000)us-gaap_NonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(22,900,000)us-gaap_NonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Income (loss) before income taxes                 (44,700,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(54,400,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
(42,400,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Supplementary Data                      
Plant, equipment and timberlands, net 6,100,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
      5,600,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
      6,100,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
5,600,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
300,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Depreciation, depletion and amortization                 1,900,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
1,300,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
 
Capital expenditures                 $ 2,400,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
$ 5,100,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
$ 300,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember