Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Condensed Consolidated Statements of Operations
Net sales	$ 200,297	$ 218,795	$ 639,920	$ 774,165
Operating costs and expenses:
Cost of sales	166,117	178,305	540,491	592,128
Selling, general and administrative expenses	25,411	24,737	80,649	83,368
Research and development	6,698	7,172	21,264	21,620
Restructuring charges	3,886	10,748	13,672	13,378
Goodwill impairment			1,092
Write down of long-lived assets	3,084	15,786	7,318	15,786
Net curtailment and settlement (gain) loss on benefit plans	587		(1,088)
Net (gain) loss on sales and disposals of assets	(196)	9	(123)	92
Total operating costs and expenses	205,587	236,757	663,275	726,372
Operating income (loss)	(5,290)	(17,962)	(23,355)	47,793
Other (income) expense:
Interest income	(54)	(62)	(111)	(136)
Interest expense	10,247	7,036	30,840	21,718
Other (income) expense, net	(1,641)	716	(1,126)	1,918
Income (loss) before income taxes	(13,842)	(25,652)	(52,958)	24,293
Income tax expense (benefit)	415	2,119	3,973	5,897
Net income (loss)	$ (14,257)	$ (27,771)	$ (56,931)	$ 18,396
Net income (loss) per share:
Basic (in dollars per share)	$ (0.32)	$ (0.62)	$ (1.27)	$ 0.43
Diluted (in dollars per share)	$ (0.32)	$ (0.62)	$ (1.27)	$ 0.35
Weighted-average shares outstanding:
Basic (in shares)	44,918	44,644	44,879	42,834
Diluted (in shares)	44,918	44,644	44,879	52,302