Condensed Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net sales	$ 189,075	$ 143,671	$ 542,202	$ 387,734
Cost and expenses:
Cost of sales	151,128	118,665	432,054	312,134
Selling, general, and administrative expenses	22,434	16,388	67,514	51,464
Research, technical, and product development expenses	1,012	925	3,181	2,447
Asset and asset-related charges (income)	1,617		1,617	(1,501)
Operating income	12,884	7,693	37,836	23,190
Other income (expense), net	32	198	334	(238)
Interest income	18	331	133	911
Interest expense	(4,708)	(4,173)	(13,195)	(12,723)
Income before income taxes	8,226	4,049	25,108	11,140
Provision for income taxes	2,601	1,982	8,695	4,603
Net income	$ 5,625	$ 2,067	$ 16,413	$ 6,537
Earnings per share:
Basic	$ 0.19	$ 0.07	$ 0.54	$ 0.22
Diluted	$ 0.19	$ 0.07	$ 0.54	$ 0.22
Weighted-average shares outstanding:
Basic	30,137,187	30,025,607	30,117,204	30,013,464
Diluted	30,247,372	30,251,411	30,232,304	30,278,456