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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - UNAUDITED - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - UNAUDITED [Abstract]
Net income	$ 35,366	$ 22,161	$ 105,163	$ 106,927
Other comprehensive (loss) income:
Foreign currency translation adjustment	(15,918)	48,305	(31,338)	83,532
Unamortized retirement credits (costs), net of tax (expense) benefit of $(1,328), $1,912, $(2,954), and $2,621, respectively	4,688	(6,774)	10,342	(9,036)
Unrealized gain on interest rate swaps, net of tax (expense) of $(678), $(184), $(1,453) and $(436), respectively	2,000	582	4,347	1,472
Total other comprehensive (loss) income	(9,230)	42,113	(16,649)	75,968
Comprehensive income	$ 26,136	$ 64,274	$ 88,514	$ 182,895

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