Segments - Reconciliation of Net Income to Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2023	Jan. 31, 2023	Oct. 31, 2022	Jul. 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Segment Reporting [Abstract]
Net income	$ 75,593	$ 64,775	$ 103,153	$ 89,470	$ 76,496	$ 61,383	$ 74,361	$ 61,202	$ 332,991	$ 273,442	$ 105,560
Interest expense									65,843	58,097	53,786
Write-off of debt discount and deferred financing fees									0	0	4,606
Interest income									(1,287)	(163)	(86)
Provision for income taxes									114,512	91,377	31,534
Depreciation expense									61,177	55,437	50,480
Amortization expense									65,730	63,795	57,645
Stock appreciation expense									7,703	4,403	3,173
Redeemable noncontrolling interests									1,178	1,983	1,288
Equity-based compensation									13,217	10,968	8,442
Severance and other permitted costs									2,788	1,132	2,948
Transaction costs (acquisitions and other)									1,961	3,545	1,068
Gain on disposal of assets									(1,413)	(913)	(1,011)
Effects of fair value adjustments to inventory									1,123	3,818	788
Gain on legal settlement									0	0	(1,382)
Debt transaction costs									173	0	532
Adjusted EBITDA									$ 665,696	$ 566,921	$ 319,371