Condensed Consolidating Financial Statements (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Condensed Consolidating Statement of Operations
Net sales	$ 177,184	$ 201,310	$ 550,897	$ 629,484
Operating costs and expenses:
Cost of sales	138,436	156,842	429,630	506,304
Selling, general and administrative expenses	22,278	23,374	75,656	73,663
Research and development	6,134	6,303	18,560	19,230
Restructuring charges	1,714	6,063	3,561	9,580
Net (gain) loss on sales and disposals of assets	129	(574)	(233)	(759)
Total operating costs and expenses	168,691	192,008	527,174	608,018
Operating income (loss)	8,493	9,302	23,723	21,466
Interest income	(4)	(5)	(10)	(11)
Interest Expense	9,852	9,938	29,676	30,681
Change in value of NEC TOKIN options	(700)	(2,500)	26,300	(13,200)
Other (income) expense, net	1,320	1,201	2,495	1,629
Income (Loss) from Subsidiaries, before Tax	0	0	0	0
Income (loss) from continuing operations before income taxes and equity income (loss) from NEC TOKIN	665	3,070	(29,748)	5,625
Income Tax Expense (Benefit)	2,760	1,359	3,950	5,224
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN	(2,095)	1,711	(33,698)	401
Income (Loss) from Equity Method Investments	(6,505)	1,367	(4,758)	(76)
Income (Loss) from Continuing Operations Attributable to Parent	(8,600)	3,078	(38,456)	325
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	(164)	0	5,379
Net Income (Loss) Attributable to Parent	(8,600)	2,914	(38,456)	5,704
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(6,900)	(164)	(43,347)	(8,623)
Parent
Condensed Consolidating Statement of Operations
Net sales	0	85	0	195
Operating costs and expenses:
Cost of sales	232	687	931	1,712
Selling, general and administrative expenses	8,306	7,193	27,028	31,338
Research and development	79	149	26	355
Restructuring charges	0	0	0	0
Net (gain) loss on sales and disposals of assets	0	0	(7)	(9)
Total operating costs and expenses	8,617	8,029	27,978	33,396
Operating income (loss)	(8,617)	(7,944)	(27,978)	(33,201)
Interest income	0	0	0	0
Interest Expense	9,461	9,631	28,395	29,156
Change in value of NEC TOKIN options			0
Other (income) expense, net	7,931	7,373	25,484	31,175
Income (Loss) from Subsidiaries, before Tax	1,547	13,116	(7,567)	36,886
Income (loss) from continuing operations before income taxes and equity income (loss) from NEC TOKIN	(8,600)	2,914	(38,456)	5,704
Income Tax Expense (Benefit)	0	0	0	0
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN	(8,600)	2,914	(38,456)	5,704
Income (Loss) from Equity Method Investments	0	0	0	0
Income (Loss) from Continuing Operations Attributable to Parent	(8,600)	2,914	(38,456)	5,704
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0	0	0
Net Income (Loss) Attributable to Parent	(8,600)	2,914	(38,456)	5,704
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(10,474)	293	(37,698)	(4,061)
Guarantor Subsidiaries
Condensed Consolidating Statement of Operations
Net sales	211,268	242,498	655,808	748,094
Operating costs and expenses:
Cost of sales	173,368	192,305	528,352	626,305
Selling, general and administrative expenses	16,207	18,562	56,197	50,785
Research and development	4,232	4,321	12,834	12,918
Restructuring charges	726	1,133	2,182	1,695
Net (gain) loss on sales and disposals of assets	(348)	(144)	(1,101)	86
Total operating costs and expenses	194,185	216,177	598,464	691,789
Operating income (loss)	17,083	26,321	57,344	56,305
Interest income	0	0	0	0
Interest Expense	267	39	865	702
Change in value of NEC TOKIN options	(700)	(2,500)	26,300	(13,200)
Other (income) expense, net	(7,997)	(8,435)	(25,065)	(35,934)
Income (Loss) from Subsidiaries, before Tax	0	0	0	0
Income (loss) from continuing operations before income taxes and equity income (loss) from NEC TOKIN	9,519	20,347	5,114	32,869
Income Tax Expense (Benefit)	44	57	(320)	290
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN	9,475	20,290	5,434	32,579
Income (Loss) from Equity Method Investments	(6,505)	1,367	(4,758)	(76)
Income (Loss) from Continuing Operations Attributable to Parent	2,970	21,657	676	32,503
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		(2)	0	102
Net Income (Loss) Attributable to Parent	2,970	21,655	676	32,605
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	4,604	24,794	(7,109)	40,644
Non-Guarantor Subsidiaries
Condensed Consolidating Statement of Operations
Net sales	170,531	188,122	527,604	588,324
Operating costs and expenses:
Cost of sales	156,669	179,437	490,621	540,184
Selling, general and administrative expenses	10,547	11,427	34,672	36,772
Research and development	1,823	1,833	5,700	5,957
Restructuring charges	988	4,930	1,379	7,885
Net (gain) loss on sales and disposals of assets	477	(430)	875	(836)
Total operating costs and expenses	170,504	197,197	533,247	589,962
Operating income (loss)	27	(9,075)	(5,643)	(1,638)
Interest income	(4)	(5)	(10)	(11)
Interest Expense	124	268	416	823
Other (income) expense, net	1,386	2,263	2,076	6,388
Income (Loss) from Subsidiaries, before Tax	0	0	0	0
Income (loss) from continuing operations before income taxes and equity income (loss) from NEC TOKIN	1,293	(7,075)	(3,973)	3,938
Income Tax Expense (Benefit)	2,716	1,302	4,270	4,934
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN	(1,423)	(8,377)	(8,243)	(996)
Income (Loss) from Equity Method Investments	0	0	0	0
Income (Loss) from Continuing Operations Attributable to Parent	(1,423)	(8,377)	(8,243)	(996)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		(162)	0	5,277
Net Income (Loss) Attributable to Parent	(1,423)	(8,539)	(8,243)	4,281
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	517	(12,135)	(6,107)	(8,320)
Reclassifications and Eliminations
Condensed Consolidating Statement of Operations
Net sales	(204,615)	(229,395)	(632,515)	(707,129)
Operating costs and expenses:
Cost of sales	(191,833)	(215,587)	(590,274)	(661,897)
Selling, general and administrative expenses	(12,782)	(13,808)	(42,241)	(45,232)
Research and development	0	0	0	0
Restructuring charges	0	0	0	0
Net (gain) loss on sales and disposals of assets	0	0	0	0
Total operating costs and expenses	(204,615)	(229,395)	(632,515)	(707,129)
Operating income (loss)	0	0	0	0
Interest income	0	0	0	0
Interest Expense	0	0	0	0
Change in value of NEC TOKIN options			0
Other (income) expense, net	0	0	0	0
Income (Loss) from Subsidiaries, before Tax	(1,547)	(13,116)	7,567	(36,886)
Income (loss) from continuing operations before income taxes and equity income (loss) from NEC TOKIN	(1,547)	(13,116)	7,567	(36,886)
Income Tax Expense (Benefit)	0	0	0	0
Income (loss) from continuing operations before equity income (loss) from NEC TOKIN	(1,547)	(13,116)	7,567	(36,886)
Income (Loss) from Equity Method Investments	0	0	0	0
Income (Loss) from Continuing Operations Attributable to Parent	(1,547)	(13,116)	7,567	(36,886)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		0	0	0
Net Income (Loss) Attributable to Parent	(1,547)	(13,116)	7,567	(36,886)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (1,547)	$ (13,116)	$ 7,567	$ (36,886)