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Income Taxes - Provision for Income Taxes from Discontinued Operations - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued operation, tax effect of discontinued operation $ 0 $ 0 $ 20,578
Performance Fibers business      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued operation, tax effect of discontinued operation     $ 20,578