Changes in Other Comprehensive Loss (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	$ (57,911)	$ (59,986)
Other comprehensive income (loss) before reclassification	(4,388)	(3,863)
Amounts reclassified from other comprehensive loss	(2,621)	(1,071)
Net current period other comprehensive income (loss)	(7,009)	(4,934)
Ending balance net of tax	(64,920)	(64,920)
Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(37,453)	(37,356)
Other comprehensive income (loss) before reclassification	(17)	(347)
Amounts reclassified from other comprehensive loss	229	462
Net current period other comprehensive income (loss)	212	115
Ending balance net of tax	(37,241)	(37,241)
Foreign currency exchange (gain) loss
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(19,700)	(21,776)
Other comprehensive income (loss) before reclassification	(4,226)	(2,150)
Amounts reclassified from other comprehensive loss	0	0
Net current period other comprehensive income (loss)	(4,226)	(2,150)
Ending balance net of tax	(23,926)	(23,926)
Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(3,789)	(2,038)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(2,850)	(1,533)
Tax expense | Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(79)	(161)
Tax expense | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	939	505
Cost of products sold | Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	308	623
Cost of products sold | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	44	39
Interest Expense [Member] | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	610	1,056
Foreign currency exchange (gain) loss | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(4,443)	(3,133)
Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(758)	(854)
Other comprehensive income (loss) before reclassification	(145)	(1,366)
Amounts reclassified from other comprehensive loss	(2,850)	(1,533)
Net current period other comprehensive income (loss)	(2,995)	(2,899)
Ending balance net of tax	$ (3,753)	$ (3,753)