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Commitments and Contingencies (Details) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2000 assessment
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] |  |  |  |  |
2016 |  | $ 4.5 |  |  |
2017 |  | 3.6 |  |  |
2018 |  | 2.7 |  |  |
2019 |  | 2.7 |  |  |
2020 |  | 2.7 |  |  |
Thereafter |  | 13.2 |  |  |
Total |  | 29.4 |  |  |
Rent expense |  | 6.8 | $ 6.1 | $ 5.3 |
Loss Contingencies [Line Items] |  |  |  |  |
Capital expenditures for environmental matters |  | 2.6 |  |  |
Capital expenditures for environmental matters, next fiscal year (less than) |  | 2.0 |  |  |
Capital expenditures for environmental matters, due in two years (less than) |  | 2.0 |  |  |
Unfavorable Regulatory Action [Member] | Raw Materials Assessment [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of assessments from the tax authorities regarding ICMS taxes | assessment |  |  |  |  | 2
Amount of denied assessment appealed | $ 16.0 |  |  |  |
Number of tax assessments related to periods that predated acquisition and are covered by indemnification | assessment |  |  |  |  | 1
Potential loss due to assessment | $ 11.0 |  |  |  |
Unfavorable Regulatory Action [Member] | Electricity Assessment [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of assessments from the tax authorities regarding ICMS taxes | assessment |  |  |  |  | 3
Unfavorable Regulatory Action [Member] | Electricity Assessment One [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Potential loss due to assessment |  | 4.0 |  |  |
Unfavorable Regulatory Action [Member] | Electricity Assessment Two [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Potential loss due to assessment |  | 6.0 |  |  |
Unfavorable Regulatory Action [Member] | Electricity Assessment Three [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Potential loss due to assessment |  | 3.0 |  |  |
LTRI and PdM Subsidiaries [Member] | Energy Cogeneration Steam Supply Agreement [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Minimum annual commitments |  | 3.0 |  |  |
SWM-B Brazilian Mill [Member] | Transmission and Distribution of Energy Agreement [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Purchase of electrical energy, estimated annual cost |  | 4.0 |  |  |
French Mills [Member] | Transmission and Distribution of Energy Agreement [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Estimated due within one year |  | 10.0 |  |  |
Calcium Carbonate [Member] | PdM Subsidiary [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Purchase commitment, remaining amount committed |  | 2.0 |  |  |
Calcium Carbonate, Through 2024 [Member] | PdM Subsidiary [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Purchase commitment, remaining amount committed |  | $ 13.0 |  |  |

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