Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 87,356	$ 65,004
Accounts receivable, net	82,519	93,168
Inventories, net	154,519	168,879
Prepaid expenses and other	24,035	25,496
Total current assets	348,429	352,547
Noncurrent Assets:
Property, plant and equipment, net of accumulated depreciation of $817,605 and $815,338 as of December 31, 2016 and March 31, 2016, respectively	211,927	241,839
Goodwill	40,294	40,294
Intangible assets, net	30,204	33,301
Investment in NEC TOKIN	21,202	20,334
Deferred income taxes	7,768	8,397
Other assets	2,712	3,068
Total assets	662,536	699,780
Current liabilities:
Current portion of long-term debt	0	2,000
Accounts payable	62,347	70,981
Accrued expenses	46,418	50,320
Income taxes payable	1,068	453
Total current liabilities	109,833	123,754
Liabilities, Noncurrent [Abstract]
Long-term debt, less current portion	386,226	385,833
Other non-current obligations	72,704	74,892
Deferred income taxes	3,326	2,820
Stockholders’ equity:
Preferred stock, par value $0.01, authorized 10,000 shares, none issued	0	0
Common stock, par value $0.01, authorized 175,000 shares, issued 46,508 shares at December 31, 2016 and March 31, 2016	465	465
Additional paid-in capital	445,950	452,821
Retained deficit	(304,565)	(299,510)
Accumulated other comprehensive income	(51,024)	(31,425)
Treasury stock, at cost (67 and 611 shares at December 31, 2016 and March 31, 2016, respectively)	(379)	(9,870)
Total stockholders’ equity	90,447	112,481
Total liabilities and stockholders’ equity	$ 662,536	$ 699,780