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Derivative Instruments (Derivative instruments in the condensed consolidated balance sheet) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Designated as Hedging Instrument \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ (36)	$ 49	$ (161)	$ 49
Designated as Hedging Instrument \| Foreign exchange contracts \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	0		0		$ (33)
Designated as Hedging Instrument \| Foreign exchange contracts \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	25		25		318
Designated as Hedging Instrument \| Interest Rate Swap [Member] \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(1,399)		(1,399)		(1,402)
Designated as Hedging Instrument \| Interest Rate Swap [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(1,476)		(1,476)		(1,894)
Designated as Hedging Instrument \| Cross Currency Interest Rate Contract [Member] \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	0		0		0
Designated as Hedging Instrument \| Cross Currency Interest Rate Contract [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	197		197		1,750
Designated as Hedging Instrument \| Cross Currency Interest Rate Contract [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(14,289)		(14,289)		(5,254)
Derivatives Not Designated as Hedging Instruments \| Foreign exchange contracts \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(1)		(1)		$ 0
Foreign currency exchange (gain) loss \| Designated as Hedging Instrument \| Cross Currency Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(5,623)	6,428	(7,928)	4,524
Foreign currency exchange (gain) loss \| Derivatives Not Designated as Hedging Instruments \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	17	(42)	(1)	(7)
Cost of products sold \| Designated as Hedging Instrument \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	70	7	78	8
Cost of products sold \| Designated as Hedging Instrument \| Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(194)	(313)	(367)	(1,726)
Cost of products sold \| Designated as Hedging Instrument \| Cross Currency Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(5,667)	6,605	(7,940)	5,604
Interest Expense [Member] \| Designated as Hedging Instrument \| Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (425)	$ 112	$ (687)	$ 359