Stockholders' Equity - Accumulated Other Comprehensive Loss (Details) $ in Thousands	9 Months Ended
	Jan. 31, 2021 USD ($)
Accumulated other comprehensive (loss) income
Balance	$ 633,981
Balance	761,014
Other comprehensive loss on derivative instruments before reclassification, tax	200
Reclassification of (decrease) increase in fair value financial instruments from Accumulated other comprehensive income (loss)
Amount expected to be reclassified to earnings during next twelve months	(2,100)
Accumulated Other Comprehensive Loss
Accumulated other comprehensive (loss) income
Balance	(65,082)
Other comprehensive income (loss) before reclassification	39,050
Reclassification to earnings from accumulated other comprehensive loss	6,540
Balance	(19,492)
Foreign Currency Translation
Accumulated other comprehensive (loss) income
Balance	(40,577)
Other comprehensive income (loss) before reclassification	39,813
Balance	(764)
Derivative Financial Instruments
Accumulated other comprehensive (loss) income
Balance	(24,505)
Other comprehensive income (loss) before reclassification	(763)
Reclassification to earnings from accumulated other comprehensive loss	6,540
Balance	$ (18,728)