Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements of Operations
Net sales	$ 202,723	$ 223,632
Operating costs and expenses:
Cost of sales	185,189	191,321
Selling, general and administrative expenses	26,502	27,255
Research and development	6,380	7,733
Restructuring charges	4,610	1,264
Net loss on sales and disposals of assets		104
Total operating costs and expenses	222,681	227,677
Operating loss	(19,958)	(4,045)
Other (income) expense:
Interest income	(164)	(31)
Interest expense	10,034	10,457
Other expense, net	354	1,511
Loss before income taxes and equity loss from NEC TOKIN	(30,182)	(15,982)
Income tax expense	1,580	1,771
Loss before equity loss from NEC TOKIN	(31,762)	(17,753)
Equity loss from NEC TOKIN	(3,377)
Net loss	$ (35,139)	$ (17,753)
Net loss per share:
Basic (in dollars per share)	$ (0.78)	$ (0.40)
Diluted (in dollars per share)	$ (0.78)	$ (0.40)
Weighted-average shares outstanding:
Basic (in shares)	45,022	44,808
Diluted (in shares)	45,022	44,808