Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities:
Net income (loss)	$ (7,402)	$ 9,413
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	22,383	25,435
Loss on asset sales and disposals	54	119
Change in accounts receivable	(2,538)	1,389
Change in inventories	(7,182)	(11,303)
Change in accounts payable	(6,344)	(6,688)
Accrued interest and amortization of discounts and finance fees	713	(1,890)
Pension & non-pension postretirement benefits, net	2,982	(1,766)
Accrued liabilities & prepaid expenses	9,442	14,687
Income taxes	(3,619)	1,415
Share-based compensation expense	2,148	3,323
Other operating activities	(728)	(1,779)
Net cash provided by operating activities	9,909	32,355
Investing activities:
Additions to property, plant and equipment	(27,048)	(15,511)
Net cash used in investing activities	(27,048)	(15,511)
Financing activities:
Borrowings on ABL credit facility	3,277	6,000
Repayments on ABL credit facility	(3,277)	(6,000)
Other repayments	(169)	(350)
Repayments on Term Loan B	(12,200)	(12,200)
Stock options exercised	466	1,050
Taxes paid on distribution of equity awards	(601)	(764)
Dividends	(5,169)	(5,032)
Treasury shares purchased	0	(2,000)
Other financing activities	888	0
Net cash used in financing activities	(16,785)	(19,296)
Effect of exchange rate fluctuations on cash	1,080	(146)
Decrease in cash	(32,844)	(2,598)
Cash & cash equivalents at beginning of period	61,011	49,044
Cash & cash equivalents at end of period	28,167	46,446
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	9,155	12,160
Cash paid during the period for income taxes	$ 2,011	$ 4,469