Stockholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Accumulated other comprehensive (loss) income [Roll Forward]
Beginning balance	$ 822,462	$ 633,981	$ 629,176
Other comprehensive income (loss) before reclassification	(19,678)	61,030	(40,520)
Reclassification to earnings from accumulated other comprehensive income (loss)	8,876	8,811	2,012
Ending balance	1,064,498	822,462	633,981
Other comprehensive loss on derivative instruments before reclassification, tax	2,000	100	6,400
Reclassification to earnings from accumulated other comprehensive income (loss) on derivative instruments	2,900	2,800	600
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive (loss) income [Roll Forward]
Beginning balance	4,759	(65,082)	(26,574)
Ending balance	(6,043)	4,759	(65,082)
Foreign Currency Translation
Accumulated other comprehensive (loss) income [Roll Forward]
Beginning balance	20,764	(40,577)	(22,320)
Other comprehensive income (loss) before reclassification	(25,805)	61,341	(18,257)
Reclassification to earnings from accumulated other comprehensive income (loss)	0	0	0
Ending balance	(5,041)	20,764	(40,577)
Derivative Financial Instruments
Accumulated other comprehensive (loss) income [Roll Forward]
Beginning balance	(16,005)	(24,505)	(4,254)
Other comprehensive income (loss) before reclassification	6,127	(311)	(22,263)
Reclassification to earnings from accumulated other comprehensive income (loss)	8,876	8,811	2,012
Ending balance	$ (1,002)	$ (16,005)	$ (24,505)