Condensed Consolidating Financial Statements (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Condensed Consolidating Statement 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	4,200	15,786	7,318	15,786
Settlement gains 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:
Other (income) expense, net	8,552		7,690	29,603	23,500
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
Parent
Operating costs and expenses:
Cost of sales	460		265	1,553	551
Selling, general and administrative expenses	7,916		6,269	22,957	23,335
Research and development	55			155
Net (gain) loss on sales and disposals of assets	4			4	3
Total operating costs and expenses	8,435		6,534	24,669	23,889
Operating income (loss)	(8,435)		(6,534)	(24,669)	(23,889)
Other (income) expense:
Other (income) expense, net	3,181		692	10,144	(6,974)
Equity in (earnings) losses of subsidiaries	2,641		20,545	22,118	(34,119)
Income (loss) before income taxes	(14,257)		(27,771)	(56,931)	17,204
Income tax expense (benefit)					(1,192)
Net income (loss)	(14,257)		(27,771)	(56,931)	18,396
Guarantor Subsidiaries
Condensed Consolidating Statement of Operations
Net sales	216,004		218,614	690,815	738,052
Operating costs and expenses:
Cost of sales	184,993		184,345	617,857	610,850
Selling, general and administrative expenses	14,072		8,038	45,792	41,249
Research and development	4,549		4,809	14,578	15,112
Restructuring charges	2,476		(19)	4,436	1,819
Goodwill impairment				1,092
Net (gain) loss on sales and disposals of assets	9		78	42	107
Total operating costs and expenses	206,099		197,251	683,797	669,137
Operating income (loss)	9,905		21,363	7,018	68,915
Other (income) expense:
Other (income) expense, net	5,972		7,837	20,624	31,788
Income (loss) before income taxes	3,933		13,526	(13,606)	37,127
Income tax expense (benefit)	123		49	230	146
Net income (loss)	3,810		13,477	(13,836)	36,981
Non-Guarantor Subsidiaries
Condensed Consolidating Statement of Operations
Net sales	199,936		200,560	655,006	725,897
Operating costs and expenses:
Cost of sales	185,470		193,591	594,773	653,281
Selling, general and administrative expenses	14,260		10,913	44,109	36,628
Research and development	2,094		2,363	6,531	6,508
Restructuring charges	1,410		10,767	9,236	11,559
Write down of long-lived assets	3,084		15,786	7,318	15,786
Settlement gains on benefit plans	587			(1,088)
Net (gain) loss on sales and disposals of assets	(209)		(69)	(169)	(18)
Total operating costs and expenses	206,696		233,351	660,710	723,744
Operating income (loss)	(6,760)		(32,791)	(5,704)	2,153
Other (income) expense:
Other (income) expense, net	(601)		(541)	(1,165)	(1,085)
Income (loss) before income taxes	(6,159)		(32,250)	(4,539)	3,238
Income tax expense (benefit)	292		2,070	3,743	6,943
Net income (loss)	(6,451)		(34,320)	(8,282)	(3,705)
Reclassifications and Eliminations
Condensed Consolidating Statement of Operations
Net sales	(215,643)		(200,379)	(705,901)	(689,784)
Operating costs and expenses:
Cost of sales	(204,806)		(199,896)	(673,692)	(672,554)
Selling, general and administrative expenses	(10,837)		(483)	(32,209)	(17,844)
Total operating costs and expenses	(215,643)		(200,379)	(705,901)	(690,398)
Operating income (loss)					614
Other (income) expense:
Other (income) expense, net			(298)		(229)
Equity in (earnings) losses of subsidiaries	(2,641)		(20,545)	(22,118)	34,119
Income (loss) before income taxes	2,641		20,843	22,118	(33,276)
Net income (loss)	$ 2,641		$ 20,843	$ 22,118	$ (33,276)