Derivatives - Gain (Loss) for Derivative Instruments Designated as Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Currency Swap | Other income/expense, net | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	$ (3,407)	$ 0	$ (3,407)	$ 0
Gain (Loss) Reclassified from AOCI to Income	(1,572)	0	(1,572)	0
Gain (Loss) Recorded Directly to Income	8,358	0	8,358	0
Currency Swap | Other income/expense, net | Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	(3,571)	0	(3,571)	0
Gain (Loss) Reclassified from AOCI to Income	1,609	0	1,609	0
Gain (Loss) Recorded Directly to Income	0	0	0	0
Foreign Exchange Forward | Cost of sales | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	(2,435)	(7,130)	(2,130)	(9,711)
Gain (Loss) Reclassified from AOCI to Income	170	(1,800)	(275)	(2,904)
Gain (Loss) Recorded Directly to Income	$ 0	$ 0	$ 0	$ 0