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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net Income	$ 168,263	$ 192,186	$ 113,643
Other Comprehensive (Loss) Income:
Foreign currency translation adjustment	(60,534)	67,639	(51,292)
Unrealized retirement costs, net of tax benefit of $1,337, $252, and $3,286, respectively	(5,031)	(524)	(11,097)
Unrealized (loss) gain on interest rate swaps, net of tax benefit (expense) of $1,161, $(459), and $(1,709), respectively	(3,593)	592	2,788
Total Other Comprehensive (Loss) Income	(69,158)	67,707	(59,601)
Comprehensive Income	$ 99,105	$ 259,893	$ 54,042

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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