Financial Risk Management and Derivatives (Details) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Forward foreign currency exchange contracts included in other current liabilities	$ 1,193,000	$ 159,000
Forward Foreign Currency Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of foreign currency derivatives	19,356,000	17,796,000
Forward Foreign Currency Exchange Contracts [Member] | General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Forward foreign currency exchange contracts	$ (1,034,000)	$ (842,000)	$ 804,000