Significant Accounting Policies (Details) $ in Thousands		12 Months Ended
	May 13, 2021	Apr. 30, 2025 USD ($) state store people	Apr. 30, 2024 USD ($)	Apr. 30, 2023 USD ($)
Accounting Policies [Abstract]
Number of stores | store		2,904
Number of states in which entity operates | state		20
Population of communities (many less than) | people		20,000
Concentration Risk
Excess of current cost over the stated LIFO Value		$ 162,991	$ 151,461
Amortization		10,950	14,108	$ 12,302
Goodwill		1,244,893	652,663
Asset impairment charges		4,080	4,057	$ 3,500
Contract liability		64,077	52,934
Discounted liability of asset retirement obligation		52,105	39,954
Self insurance reserve		74,471	57,369
Accrued environmental liability		385	299
Capitalized software costs
Concentration Risk
Finite-lived intangible assets		$ 35,588	37,619
Capitalized software costs | Minimum
Concentration Risk
Intangible asset useful life		2 years
Capitalized software costs | Maximum
Concentration Risk
Intangible asset useful life		13 years
Customer Relationships
Concentration Risk
Useful life	15 years
Intangible assets, net		$ 51,807	24,880
Accumulated amortization		9,293	$ 6,220
Annual amortization, year one		4,073
Annual amortization, year two		4,073
Annual amortization, year three		4,073
Annual amortization, year four		4,073
Annual amortization, year five		$ 4,073