Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Net sales	$ 289,856	$ 243,794
Operating costs and expenses:
Cost of sales	210,504	182,886
Selling, general and administrative expenses	30,276	24,215
Research and development	7,086	6,031
Restructuring charges	1,025	1,792
Net loss on sales and disposals of assets	123	335
Total operating costs and expenses	249,014	215,259
Operating income	40,842	28,535
Other (income) expense:
Interest income	(43)	(21)
Interest expense	7,400	7,458
Loss on early extinguishment of debt		38,248
Other (income) expense, net	(95)	1,674
Income (loss) before income taxes	33,580	(18,824)
Income tax expense	1,731	1,275
Net income (loss)	$ 31,849	$ (20,099)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.81	$ (0.74)
Diluted (in dollars per share)	$ 0.61	$ (0.74)
Weighted-average shares outstanding:
Basic (in shares)	39,452	27,045
Diluted (in shares)	52,338	27,045