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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - UNAUDITED - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
Net Income	$ 9,236	$ 31,014
Other Comprehensive Income (Loss):
Foreign currency translation adjustment	27,405	(44,640)
Unamortized retirement costs, net of tax (benefit) provision of $(577) and $3,304, respectively	(1,947)	9,004
Unrealized gain on interest rate swaps, net of tax benefit of $221 and $509, respectively	(361)	(830)
Total Other Comprehensive Income (Loss)	25,097	(36,466)
Comprehensive Income (Loss)	$ 34,333	$ (5,452)

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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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