Changes in Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2023	Sep. 30, 2023
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		$ (38,043)
Other comprehensive income (loss) before reclassification	$ (5,102)	87
Amounts reclassified from other comprehensive loss	(5,054)	(6,759)
Net current period other comprehensive income (loss)	(10,156)	(6,672)
Ending balance net of tax	(44,715)	(44,715)
AOCI Attributable to Parent
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(34,559)	(38,043)
Ending balance net of tax	(44,715)	(44,715)
Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(12,758)	(12,800)
Other comprehensive income (loss) before reclassification	(256)	(260)
Amounts reclassified from other comprehensive loss	48	94
Net current period other comprehensive income (loss)	(208)	(166)
Ending balance net of tax	(12,966)	(12,966)
Foreign currency exchange (gain) loss
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	(29,451)	(32,352)
Other comprehensive income (loss) before reclassification	(9,683)	(6,782)
Amounts reclassified from other comprehensive loss	0	0
Net current period other comprehensive income (loss)	(9,683)	(6,782)
Ending balance net of tax	(39,134)	(39,134)
Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(6,766)	(9,089)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(5,102)	(6,853)
Gain (Loss) on Derivative Instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax	7,650	7,109
Other comprehensive income (loss) before reclassification	4,837	7,129
Amounts reclassified from other comprehensive loss	(5,102)	(6,853)
Net current period other comprehensive income (loss)	(265)	276
Ending balance net of tax	7,385	7,385
Deferred Income Tax Charge [Member] \| Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(6)	(13)
Deferred Income Tax Charge [Member] \| Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	1,664	2,236
Cost of Goods and Service Benchmark [Member] \| Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	54	107
Cost of Goods and Service Benchmark [Member] \| Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	45	70
Interest Expense [Member] \| Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	(3,468)	(6,443)
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	$ (3,343)	$ (2,716)