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Financial Risk Management and Derivatives (Details) (USD $)
3 Months Ended 9 Months Ended
Dec. 31, 2013
Mar. 31, 2013
Dec. 31, 2013
Forward Foreign Currency Exchange Contracts [Member]
Mar. 31, 2013
Forward Foreign Currency Exchange Contracts [Member]
Dec. 31, 2013
Forward Foreign Currency Exchange Contracts [Member]
General and Administrative Expenses [Member]
Dec. 31, 2012
Forward Foreign Currency Exchange Contracts [Member]
General and Administrative Expenses [Member]
Dec. 31, 2013
Forward Foreign Currency Exchange Contracts [Member]
General and Administrative Expenses [Member]
Dec. 31, 2012
Forward Foreign Currency Exchange Contracts [Member]
General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]                
Notional amount of foreign currency derivatives     $ 17,726,000 $ 17,543,000        
Forward foreign currency exchange contracts         74,000 20,000 (759,000) 360,000
Forward foreign currency exchange contracts included in other current liabilities 76,000              
Forward foreign currency exchange contracts included in prepaid expenses and other current assets   $ 683,000