Stockholders' Equity - Accumulated Other Comprehensive Loss (Details) $ in Thousands	3 Months Ended
	Jul. 31, 2021 USD ($)
Accumulated other comprehensive (loss) income [Roll Forward]
Beginning balance	$ 822,462
Other comprehensive loss before reclassification	(8,520)
Reclassification to earnings from accumulated other comprehensive income (loss)	2,249
Ending balance	877,243
Other comprehensive loss on derivative instruments before reclassification, tax	100
Amount expected to be reclassified to earnings during next twelve months	700
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive (loss) income [Roll Forward]
Beginning balance	4,759
Ending balance	(1,512)
Foreign Currency Translation
Accumulated other comprehensive (loss) income [Roll Forward]
Beginning balance	20,764
Other comprehensive loss before reclassification	(8,233)
Reclassification to earnings from accumulated other comprehensive income (loss)	0
Ending balance	12,531
Derivative Financial Instruments
Accumulated other comprehensive (loss) income [Roll Forward]
Beginning balance	(16,005)
Other comprehensive loss before reclassification	(287)
Reclassification to earnings from accumulated other comprehensive income (loss)	2,249
Ending balance	$ (14,043)