Derivatives - Gain (Loss) for Derivative Instruments Designated as Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 1,168	$ (1,089)	$ 1,553	$ (446)
Currency Swap
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			(8,300)
Gain (Loss) Reclassified from AOCI to Income	(700)		4,000
Currency Swap | Other income/expense, net | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI			(346)
Gain (Loss) Reclassified from AOCI to Income			(1,622)
Gain (Loss) Recorded Directly to Income			3,337
Currency Swap | Other income/expense, net | Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	4,631		2,625
Gain (Loss) Reclassified from AOCI to Income	2,626		5,281
Gain (Loss) Recorded Directly to Income	0		0
Currency Swap | Other income/expense, net | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	(5,108)		(7,339)
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	(2,933)		976
Gain (Loss) Recorded Directly to Income	0		0
Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	(2,200)		(3,000)
Foreign Exchange Forward
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			(200)
Foreign Exchange Forward | Cost of sales | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI	(810)	4,099	(283)	304
Gain (Loss) Reclassified from AOCI to Income	1,168	(1,089)	1,553	(446)
Gain (Loss) Recorded Directly to Income	$ 0	$ 0	$ 0	$ 0