Derivatives Hedging Foreign Currencies (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Foreign Exchange Forward
Derivatives, Fair Value [Line Items]
Derivative asset, as presented		$ 367,000
Derivative liability, as presented	$ 2,907,000
Derivative liability, offset	0
Derivative asset, offset		0
Derivative asset, gross		(367,000)
Derivative liability, gross	2,907,000
Foreign Exchange Forward | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset, as presented	(2,907,000)	0
Derivative asset, offset	40,000	523,000
Derivative asset, gross	2,947,000	523,000
Foreign Exchange Forward | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liability, as presented	0	(367,000)
Derivative liability, offset	(40,000)	(523,000)
Derivative liability, gross	(40,000)	(890,000)
Euro Member Countries, Euro
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0
Mexico, Pesos
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	49,100,000	37,700,000
Japan, Yen
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0
Sales Revenue, Net [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	(789,000)
Cost of sales
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	5,170,000	3,199,000
Operating Expense [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	5,170,000	3,199,000
Operating Income (Loss) [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (5,170,000)	$ (3,988,000)	$ 0