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Commitments and Contingencies (Details) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2017 EUR (€) | Oct. 31, 2015 USD ($) | Dec. 31, 2000 assessment
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] |  |  |  |  |  |
2017 | $ 6,200,000 |  |  |  |  |
2018 | 5,200,000 |  |  |  |  |
2019 | 4,800,000 |  |  |  |  |
2020 | 4,200,000 |  |  |  |  |
2021 | 3,700,000 |  |  |  |  |
Thereafter | 9,700,000 |  |  |  |  |
Total | 33,800,000 |  |  |  |  |
Rent expense | 6,400,000 | $ 6,900,000 | $ 6,800,000 |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Capital expenditures for environmental matters | 1,100,000 |  |  |  |  |
Capital expenditures for environmental matters, due in two years (less than) | 1,000,000 |  |  |  |  |
Unfavorable Regulatory Action [Member] | Raw Materials Assessment [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of assessments from the tax authorities regarding ICMS taxes | assessment |  |  |  |  |  | 2
Number of tax assessments related to periods that predated acquisition and are covered by indemnification | assessment |  |  |  |  |  | 1
Unfavorable Regulatory Action [Member] | Electricity Assessment [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of assessments from the tax authorities regarding ICMS taxes | assessment |  |  |  |  |  | 3
LTRI and PdM Subsidiaries [Member] | Energy Cogeneration Steam Supply Agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Minimum annual commitments | 2,000,000 |  |  |  |  |
SWM-B Brazilian Mill [Member] | Transmission and Distribution of Energy Agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Purchase of electrical energy, estimated annual cost | 3,000,000 |  |  |  |  |
French Mills [Member] | Transmission and Distribution of Energy Agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Estimated due within one year | 3,000,000 |  |  |  |  |
Calcium Carbonate [Member] | PdM Subsidiary [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Purchase commitment, remaining amount committed | 2,000,000 |  |  |  |  |
Calcium Carbonate, Through 2024 [Member] | PdM Subsidiary [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Purchase commitment, remaining amount committed | 11,000,000 |  |  |  |  |
Maximum [Member] | Unfavorable Regulatory Action [Member] | Raw Materials Assessment [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss |  |  |  |  | $ 16,000,000 |
Maximum [Member] | Unfavorable Regulatory Action [Member] | Raw Materials Assessment 2 [Member] [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | 12,700,000 |  |  |  |  |
Maximum [Member] | Unfavorable Regulatory Action [Member] | Electricity Assessment One [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | 5,500,000 |  |  |  |  |
Maximum [Member] | Unfavorable Regulatory Action [Member] | Electricity Assessment Two [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | 9,100,000 |  |  |  |  |
Maximum [Member] | Unfavorable Regulatory Action [Member] | Electricity Assessment Three [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | $ 4,400,000 |  |  |  |  |
Maximum [Member] | Unfavorable Regulatory Action [Member] | Malaucene Co-Employment [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | € |  |  |  | € 1,300,000.0 |  |
Loss Contingency, Pending Claims, Number | 18 |  |  |  |  |
Biomass Consumption [Member] | French Mills [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Minimum annual commitments | $ 2,000,000 |  |  |  |  |

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