Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Apr. 30, 2023
Deferred income tax assets:
Allowances on accounts and notes receivable	$ 5,973	$ 5,339
Accrued payroll and related costs	2,606	2,102
Insurance reserves	4,568	4,165
Inventory costs	6,495	5,580
Deferred compensation	10,043	10,391
Equity compensation	3,903	3,716
Acquisition related costs	1,454	1,258
Net operating loss carry-forwards	1,928	1,368
Disallowed interest expense	2,097	1,854
Investment in partnerships	30,449	28,324
Operating lease liability	63,151	47,256
Other deferred tax assets, net	4,382	2,613
Total deferred income tax assets	137,049	113,966
Less: Valuation allowance	(12,541)	(11,708)
Total deferred income tax assets, net of valuation allowance	124,508	102,258
Deferred income tax liabilities:
Amortization of intangible assets	(41,663)	(40,191)
Operating lease right-of-use assets	(61,283)	(45,966)
Depreciation	(57,667)	(46,715)
Derivative instruments	(2,780)	0
Other deferred tax liabilities, net	(1,923)	(770)
Total deferred income tax liabilities	(165,316)	(133,642)
Deferred income tax liabilities	$ (40,808)	$ (31,384)