Derivative Financial Instruments - Additional Information (Details) - Designated as Hedging Instrument - Foreign currency forward contracts - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Realized gain (loss) from foreign currency forward contracts	$ (28)	$ 51	$ (60)	$ 65
Notional amount of derivative contracts	1,355	$ 1,668	1,355	$ 1,668
Foreign currency forward contracts, unrealized gain (loss)	$ (12)		$ (12)