Accumulated Other Comprehensive Loss ("AOCL") - Summary of Accumulated Other Comprehensive Loss (Detail) $ in Thousands	3 Months Ended
	Jul. 31, 2021 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 963,216
Ending Balance	979,344
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(4,496)
Other comprehensive income before reclassifications	0
Amounts reclassified from AOCL	261
Ending Balance	(4,235)
Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(58,096)
Other comprehensive income before reclassifications	324
Amounts reclassified from AOCL	0
Ending Balance	(57,772)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(62,592)
Other comprehensive income before reclassifications	324
Amounts reclassified from AOCL	261
Ending Balance	$ (62,007)