Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Intangible Assets Excluding Goodwill [Line Items]
Total definite-lived intangible assets, Gross Carrying Amount	$ 189,144	$ 166,328
Total definite-lived intangible assets, Accumulated Amortization	(126,380)	(111,838)
Total definite-lived intangible assets, Net Carrying Amount	62,764	54,490
Indefinite-lived intangible assets, Net Carrying Amount	430	430
Total Intangible assets, Gross Carrying Amount	189,574	166,758
Total Intangible assets, Net Carrying Amount	63,194	54,920
Customer Relationships
Intangible Assets Excluding Goodwill [Line Items]
Total definite-lived intangible assets, Gross Carrying Amount	89,980	89,980
Total definite-lived intangible assets, Accumulated Amortization	(67,955)	(60,347)
Total definite-lived intangible assets, Net Carrying Amount	22,025	29,633
Developed Software and Technology
Intangible Assets Excluding Goodwill [Line Items]
Total definite-lived intangible assets, Gross Carrying Amount	25,812	25,592
Total definite-lived intangible assets, Accumulated Amortization	(19,395)	(17,183)
Total definite-lived intangible assets, Net Carrying Amount	6,417	8,409
Patents, Trademarks, and Trade Names
Intangible Assets Excluding Goodwill [Line Items]
Total definite-lived intangible assets, Gross Carrying Amount	68,663	50,007
Total definite-lived intangible assets, Accumulated Amortization	(39,030)	(34,308)
Total definite-lived intangible assets, Net Carrying Amount	29,633	15,699
Definite-lived Intangible Assets Excluding Patents in Progress
Intangible Assets Excluding Goodwill [Line Items]
Total definite-lived intangible assets, Gross Carrying Amount	184,455	165,579
Total definite-lived intangible assets, Accumulated Amortization	(126,380)	(111,838)
Total definite-lived intangible assets, Net Carrying Amount	58,075	53,741
Patents and Software in Development
Intangible Assets Excluding Goodwill [Line Items]
Total definite-lived intangible assets, Gross Carrying Amount	4,689	749
Total definite-lived intangible assets, Net Carrying Amount	$ 4,689	$ 749