Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ (2,165)	$ 2,198		$ 2,907	$ (83,024)
Effective tax rate	30.90%	12.90%		11.30%	(316.50%)
Income taxes at the statutory rate	35.00%	35.00%		35.00%	35.00%
Valuation allowance for deferred tax assets	$ (44,400)			$ (44,400)		$ (44,700)
Increase (decrease) in valuation allowance					$ (56,200)
Unrecognized tax benefits	24,400			$ 24,400		$ 24,500
Arizona Chemical
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance					31,200
Netherlands
Operating Loss Carryforwards [Line Items]
Income taxes at the statutory rate				25.00%
Sweden
Operating Loss Carryforwards [Line Items]
Income taxes at the statutory rate				22.00%
Finland
Operating Loss Carryforwards [Line Items]
Income taxes at the statutory rate				20.00%
United States
Operating Loss Carryforwards [Line Items]
Increase (decrease) in uncertain tax positions	(1,500)			$ (1,500)
United States | Arizona Chemical
Operating Loss Carryforwards [Line Items]
Increase (decrease) in uncertain tax positions		$ (2,500)			6,800
United States | Current period net operating losses
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance			$ (87,000)		$ 87,400
Europe
Operating Loss Carryforwards [Line Items]
Increase (decrease) in uncertain tax positions	$ (100)			$ (100)