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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
Net Income	$ 192,186	$ 113,643	$ 145,782
Other Comprehensive Income (Loss):
Foreign currency translation adjustment	67,639	(51,292)	(21,066)
Unrealized retirement costs, net of tax benefit of $252, $3,286, and $8,807, respectively	(524)	(11,097)	(19,971)
Unrealized gain (loss) on interest rate swaps, net of tax (provision) benefit of $(459), $(1,709), and $10, respectively	592	2,788	(16)
Total Other Comprehensive Income (Loss)	67,707	(59,601)	(41,053)
Comprehensive Income (Loss)	$ 259,893	$ 54,042	$ 104,729

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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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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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