CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - UNAUDITED - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) UNAUDITED [Abstract]
Net income	$ 16,334	$ 3,624
Other Comprehensive Income (Loss):
Foreign currency translation adjustment	46,853	(35,539)
Unamortized retirement (costs) credits, net of tax benefit (expense) of $1,705 and $(2,180), respectively	(5,665)	8,168
Unrealized gain on interest rate swaps, net of tax (expense) benefit of $(30) and $44, respectively	191	85
Total Other Comprehensive Income (Loss)	41,379	(27,286)
Comprehensive Income (Loss)	$ 57,713	$ (23,662)