Supplemental Balance Sheets and Statements of Operations Detail (Tables)

12 Months Ended

Mar. 31, 2016

Disclosure Text Block Supplement [Abstract]

Schedule of accounts receivable

	March 31,
	2016			2015
Accounts receivable:
Trade	$	116,146		$	115,504
Allowance for doubtful accounts reserve	(1,002		)	(925		)
Ship-from-stock and debit reserve	(17,362		)	(19,360		)
Returns reserves	(3,324		)	(3,190		)
Rebates reserves	(872		)	(780		)
Price protection reserves	(418		)	(270		)
Other	—			(122		)
Accounts receivable, net	$	93,168		$	90,857

Schedule of activity in allowances for accounts receivables

The following table presents the annual activities included in the allowance for these commitments:

Balance at March 31, 2013	$	18,518
Cost charged to expense	89,909
Actual adjustments applied	(83,911		)
Other	144
Balance at March 31, 2014	24,660
Cost charged to expense	91,091
Actual adjustments applied	(90,909		)
Other	(195		)
Balance at March 31, 2015	24,647
Cost charged to expense	95,212
Actual adjustments applied	(96,932		)
Other	51
Balance at March 31, 2016	$	22,978

Schedule of components of inventories

	March 31,
	2016			2015
Inventories:
Raw materials and supplies	$	80,289		$	83,372
Work in process	46,631			52,759
Finished goods	58,060			53,211
Inventory gross	184,980			189,342
Inventory reserves	(16,101		)	(17,499		)
Inventory, net	$	168,879		$	171,843

Schedule of the annual activities included in the allowance for commitments

The following table presents the annual activities included in the inventory reserves:

Balance at March 31, 2013	$	18,464
Costs charged to expense	11,846
Write-offs	(3,880		)
Other	396
Balance at March 31, 2014	26,826
Costs charged to expense	9,291
Write-offs	(17,520		)
Other	(1,098		)
Balance at March 31, 2015	17,499
Costs charged to expense	5,696
Write-offs	(7,326		)
Other	232
Balance at March 31, 2016	$	16,101

Schedule of Property, plant and equipment

	Useful life (years)	March 31,
		2016			2015
Property, plant and equipment:
Land and land improvements	20	$	22,380		$	22,017
Buildings	20 - 40	148,805			149,451
Machinery and equipment	10	793,250			798,112
Furniture and fixtures	4 - 10	69,442			60,903
Construction in progress		21,197			21,260
Other		2,103			2,184
Total property and equipment		1,057,177			1,053,927
Accumulated depreciation		(815,338		)	(804,286		)
Property, plant and equipment, net		$	241,839		$	249,641

Schedule of accrued expenses

	March 31,
	2016		2015
Accrued expenses:
Salaries, wages, and related employee costs	$	20,708	$	26,117
Interest	15,683		15,678
Restructuring	946		6,591
Vacation	7,892		6,286
Other	5,091		5,784
Total accrued expenses	$	50,320	$	60,456

Schedule of other non-current obligations

	March 31,
	2016		2015
Other non-current obligations:
Pension plans	35,156		38,982
Employee separation liability	9,352		10,638
Deferred compensation	1,544		1,548
Long-term obligation on land purchase	—		1,594
Restructuring	30		648
NEC TOKIN option valuation	20,600		—
Long-term service contracts	2,343		—
Other	5,867		3,721
Total other non-current obligations	$	74,892	$	57,131

Schedule of other (income) expense, net

	Fiscal Years Ended March 31,
	2016			2015			2014
Non-operating (income) expense, net:
Net foreign exchange (gains) losses	(3,036		)	(4,249		)	(304		)
Gain on early extinguishment of debt	—			(1,003		)	—
Offering memorandum fees	—			1,142			—
Other	688			28			734
Total non-operating (income) expense, net	$	(2,348	)	$	(4,082	)	$	430