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Financial Risk Management and Derivatives (Tables)
9 Months Ended
Dec. 31, 2017
Financial Risk Management and Derivatives [Abstract]  
Schedule of derivative instruments on consolidated statements of operations
  
Gain (Loss) Recognized within General and Administrative Expenses
 
Derivatives Not Designated as
 
Three Months Ended
December 31,
  
Nine Months Ended
December 31,
 
Hedging Instruments
 
2017
  
2016
  
2017
  
2016
 
Forward foreign currency exchange contracts
 
$
(1,784,000
)
 
$
(964,000
)
 
$
(1,062,000
)
 
$
(2,150,000
)