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Foreign Currency Exchange Contracts and Hedging (Details)
$ in Thousands
2 Months Ended 12 Months Ended
May. 31, 2016
USD ($)
Mar. 31, 2016
USD ($)
counterparty
Mar. 31, 2015
USD ($)
counterparty
Foreign currency exchange contracts and hedging      
Number of Counterparties in Derivative Contracts | counterparty     4
Foreign currency exchange contracts      
Foreign currency exchange contracts and hedging      
Notional amounts of foreign currency hedging contracts   $ 105,000 $ 46,000
Number of Counterparties in Derivative Contracts | counterparty   7  
Maximum Remaining Maturity of Foreign Currency Derivatives   12 months  
Summary of the effect of derivative instruments on the consolidated statements of income      
Amount of (loss) gain recognized in income on derivatives   $ (1,532) 6,383
Derivatives designated as cash flow hedges      
Summary of the effect of derivative instruments on the consolidated statements of income      
Amount of (loss) gain reclassified from accumulated other comprehensive income (loss) into income (effective portion)   (1,592) 1,226
Amount of gain (loss) excluded from effectiveness testing   207 (69)
Derivatives designated as cash flow hedges | Foreign currency exchange contracts      
Summary of the effect of derivative instruments on the consolidated statements of income      
Amount of (loss) gain recognized in other comprehensive income (loss) on derivatives (effective portion)   (850) 1,556
Designated as Hedging Instrument | Foreign currency exchange contracts      
Summary of the effect of derivative instruments on the consolidated statements of income      
Derivative, Settled During Period, Notional Amount   32,000 $ 46,000
Not Designated as Hedging Instrument | Foreign currency exchange contracts      
Summary of the effect of derivative instruments on the consolidated statements of income      
Derivative, Entered Into and Settled During Period, Notional Amount   $ 261,000  
Subsequent Event | Foreign currency exchange contracts      
Foreign currency exchange contracts and hedging      
Notional amounts of foreign currency hedging contracts $ 11,000    
Subsequent Event | Not Designated as Hedging Instrument | Foreign currency exchange contracts      
Foreign currency exchange contracts and hedging      
Notional amounts of foreign currency hedging contracts $ 63,000    
Maximum Remaining Maturity of Foreign Currency Derivatives 12 months