Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Deferred income tax assets:
Allowances on accounts and notes receivable	$ 4,314	$ 2,617
Accrued payroll and related costs	3,758	5,093
Insurance reserves	4,079	4,086
Inventory costs	4,606	3,252
Deferred compensation	9,038	7,892
Equity compensation	3,253	2,612
Derivative instrument	281	5,083
Acquisition related costs	1,356	1,202
Net operating loss carry-forwards	1,815	1,591
Disallowed interest expense	1,330	974
Investment in partnerships	26,700	24,316
Operating lease liability	37,746	30,322
Other deferred tax assets, net	2,359	1,147
Total deferred income tax assets	100,635	90,187
Less: Valuation allowance	(11,719)	(11,768)
Total deferred income tax assets, net of valuation allowance	88,916	78,419
Deferred income tax liabilities:
Amortization of intangible assets	(43,314)	(19,488)
Operating lease right-of-use assets	(37,043)	(29,493)
Depreciation	(37,027)	(25,668)
Other deferred tax liabilities, net	(451)	(783)
Total deferred income tax liabilities	(117,835)	(75,432)
Deferred income tax (liabilities) assets, net	$ (28,919)
Deferred income tax (liabilities) assets, net		$ 2,987