Financial Risk Management and Derivatives (Details) - USD ($)	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Forward foreign currency exchange contracts included in other current liabilities	$ 1,015,000		$ 1,193,000
Forward Foreign Currency Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of foreign currency derivatives	19,533,000		$ 19,356,000
Forward Foreign Currency Exchange Contracts [Member] | General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Forward foreign currency exchange contracts	$ 178,000	$ 233,000