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Financial Risk Management and Derivatives (Details) - USD ($)
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]      
Forward foreign currency exchange contracts included in other current liabilities $ 416,000 $ 1,193,000  
Forward Foreign Currency Exchange Contracts [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Notional amount of foreign currency derivatives 18,917,000 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 $ 777,000 $ (1,034,000) $ (842,000)