Financial Risk Management and Derivatives (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Forward foreign currency exchange contracts included in other current liabilities	$ 2,566,000		$ 2,566,000		$ 416,000
Forward Foreign Currency Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of foreign currency derivatives	27,433,000		27,433,000		$ 18,917,000
Forward Foreign Currency Exchange Contracts [Member] | General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Forward foreign currency exchange contracts	$ (964,000)	$ 245,000	$ (2,150,000)	$ (104,000)