Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Pension and postretirement benefits	$ 809	$ 4,139
Deferred compensation	595	1,357
Restructuring Related and Other Reserves	4	842
Alternative minimum tax and net operating loss carryforward	91,769	66,709
Deferred Tax Assets, Goodwill and Intangible Assets	11,647	5,993
Other, net	2,818	3,399
Deferred tax assets before valuation allowance	107,642	82,439
Deferred Tax Assets, Valuation Allowance	(79,908)	(63,955)
Deferred Tax Assets, Net of Valuation Allowance	27,734	18,484
Deferred tax liabilities:
Depreciation	5,006	8,147
Inventory	20,172	6,071
Deferred tax liabilities, debt discount	1,883	4,075
Other, net	292	3,982
Total deferred tax liabilities	27,353	22,275
Deferred Tax Assets, Net	$ 381
Net deferred tax assets (liabilities)		$ (3,791)