Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income (loss)	$ 16,719	$ 13,758	$ 34,225	$ (14,794)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	10,633	9,569	31,286	30,837
Loss on asset sales and disposals	87	234	390	247
Change in accounts receivable	(253)	(1,926)	(7,702)	(16,329)
Change in inventories	(5,485)	(9,460)	(31,904)	(28,823)
Change in accounts payable	(1,315)	767	(8,656)	2,119
Accrued interest and amortization of discounts and finance fees	344	384	946	1,729
Call Premium on senior notes			0	37,348
Write-off of finance fees on senior notes			0	9,086
Pension & non-pension postretirement benefits	(445)	(349)	1,453	2,420
Restructuring			0	(289)
Accrued liabilities & prepaid expenses	698	4,105	12,800	(3,617)
Income taxes	(3,987)	1,498	(4,925)	(2,425)
Share-based compensation expense	905	1,109	5,549	3,746
Other operating activities	(359)	(616)	(1,414)	(2,202)
Net cash provided by operating activities	17,542	19,073	32,048	19,053
Investing activities:
Additions to property, plant and equipment	(8,244)	(16,693)	(41,480)	(38,528)
Proceeds from furnace malfunction insurance recovery			0	2,350
Proceeds from asset sales and other	0	3	2	7
Net cash used in investing activities	(8,244)	(16,690)	(41,478)	(36,171)
Financing activities:
Borrowing on ABL credit facility	0	33,400	44,500	54,700
Repayments on ABL credit facility	(7,000)	(31,500)	(37,500)	(45,800)
Other repayments	0	(5,201)	(3,267)	(5,316)
Other borrowings	0	3,250	0	5,214
Payments on 6.875% senior notes			0	(405,000)
Proceeds from Term Loan B			0	438,900
Repayments on Term Loan B	(1,100)	(1,100)	(3,300)	(1,100)
Call premium on senior notes			0	(37,348)
Stock options exercised	345	759	3,334	2,881
Dividends	(2,397)	0	(7,197)	0
Treasury shares purchased			(15,275)	0
Debt issuance costs and other	0	(91)	0	(6,959)
Net cash provided by (used in) financing activities	(10,152)	(483)	(18,705)	172
Effect of exchange rate fluctuations on cash	(397)	(1,020)	(1,808)	(1,173)
Increase (decrease) in cash	(1,251)	880	(29,943)	(18,119)
Cash at beginning of period	31,352	23,209	60,044	42,208
Cash at end of period	30,101	24,089	30,101	24,089
Supplemental disclosure of cash flow information:
Cash paid during the period for interest, net of capitalized interest	4,152	4,160	12,237	15,827
Cash paid during the period for income taxes	$ 996	$ 2,591	$ 3,858	$ 5,884