Derivatives Schedule of Fair Value and Cash Flow Hedges Including in Earnings (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Derivative [Line Items]
Other Nonoperating Income (Expense)	$ 4,356	$ (4,513)	$ (14,692)
Cost of Goods Sold (Deprecated 2018-01-31)	(840,066)	(924,276)	(860,744)
Currency Swap [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	2,600
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	(7,900)
Forward Contracts [Member]
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	(7,300)
Foreign Exchange Forward [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	11,000
Other Operating Income (Expense) [Member]
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(3,337)	(6,034)	0
Gain (Loss) on Fair Value Hedges Recognized in Earnings	1,715	1,900	0
Cost of sales
Derivative [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	3,111	(698)	2,420
Cash Flow Hedging [Member] | Other Operating Income (Expense) [Member] | Currency Swap [Member]
Derivative [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	(4,670)
Cash Flow Hedging [Member] | Cost of sales | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 3,111	$ (698)	$ 2,420