Discontinued Operations - Summary of Discontinued Operations (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]
Income tax expense	$ 0	$ 0	$ (20,578)
Income from discontinued operations, net	$ 0	$ 0	43,403
Performance Fibers business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales			456,180
Cost of sales and other			(369,210)
Transaction expenses			(22,989)
Income from discontinued operations before income taxes			63,981
Income tax expense			(20,578)
Income from discontinued operations, net			$ 43,403