Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities:
Net income	$ 4,963	$ 28,459	$ 6,966
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	40,388	43,969	41,471
Loss on asset sales and disposals	674	514	446
Change in accounts receivable	(1,808)	(12,674)	7,187
Change in inventories	(10,828)	(3,932)	(10,969)
Change in accounts payable	5,088	12,190	6,285
Accrued interest and amortization of discounts and finance fees	2,039	1,496	(6,433)
Call premium on senior notes	(37,348)	(1,350)	(23,602)
Write-off of finance fee & discounts on senior notes and ABL	9,086	1,168	10,975
Pension & non-pension postretirement benefits	(879)	7,746	(76,344)
Restructuring	(289)	2,212	0
Accrued liabilities & prepaid expenses	(7,222)	(17,507)	322
Income taxes	885	(1,804)	1,628
Share-based compensation expense	5,283	5,063	3,321
Other operating activities	(2,857)	4,479	40
Net cash provided by operating activities	81,871	72,729	8,497
Investing activities:
Additions to property, plant and equipment	(54,393)	(49,407)	(32,720)
Proceeds from furnace malfunction insurance recovery	2,350	0	0
Proceeds from asset sales and other	24	81	647
Net cash used in investing activities	(52,019)	(49,326)	(32,073)
Financing activities:
Borrowings on ABL credit facility	83,000	51,000	0
Repayments on ABL credit facility	(83,000)	(51,000)	0
Other repayments	(5,863)	(14,270)	(23,116)
Other borrowings	5,214	6,094	1,234
Proceeds from (payments on) 6.875% senior notes	(405,000)	(45,000)	450,000
Payments on 10% senior notes	0	0	(360,000)
Proceeds from Term Loan B	438,900	0	0
Payments on 10% senior notes	(2,200)	0	0
Call premium on senior notes	(37,348)	(1,350)	(23,602)
Stock options exercised	4,571	5,384	1,231
Debt issuance costs and other	(6,959)	0	(13,475)
Treasury shares purchased	(1,060)	0	0
Net cash provided by (used in) financing activities	(9,745)	(49,142)	32,272
Effect of exchange rate fluctuations on cash	(2,271)	739	221
Increase (decrease) in cash	17,836	(25,000)	8,917
Cash & cash equivalents at beginning of year	42,208	67,208	58,291
Cash & cash equivalents at end of year	60,044	42,208	67,208
Supplemental disclosure of cash flow information:
Cash paid during the year for interest, net of capitalized interest	20,302	30,008	44,105
Cash paid during the year for income taxes	$ 7,228	$ 10,855	$ 3,402