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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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
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	$ 49	$ (103)	$ 49	$ (197)
Designated as Hedging Instrument \| Foreign exchange contracts \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(60)		(60)		$ (96)
Designated as Hedging Instrument \| Foreign exchange contracts \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	20		20		43
Designated as Hedging Instrument \| Interest Rate Swap [Member] \| Prepaid expenses and other
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	0		0		470
Designated as Hedging Instrument \| Interest Rate Swap [Member] \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(396)		(396)		0
Designated as Hedging Instrument \| Interest Rate Swap [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	0		0		743
Designated as Hedging Instrument \| Interest Rate Swap [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(1,135)		(1,135)		0
Designated as Hedging Instrument \| Cross Currency Interest Rate Contract [Member] \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(148)		(148)		(774)
Designated as Hedging Instrument \| Cross Currency Interest Rate Contract [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	2,148		2,148		2,476
Designated as Hedging Instrument \| Cross Currency Interest Rate Contract [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(8,238)		(8,238)		(15,410)
Derivatives Not Designated as Hedging Instruments \| Foreign exchange contracts \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	(24)		(24)		$ (17)
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	6,428	1,438	4,524	11,377
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	(42)	(41)	(7)	(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	7	(2)	8	(100)
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	(313)	492	(1,726)	1,367
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	6,605	634	5,604	9,647
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	$ 112	$ 130	$ 359	$ 248