Acquisitions - Allocation of Purchase Price (Details) - USD ($) $ in Thousands	Apr. 30, 2023	Apr. 30, 2022	Dec. 16, 2021	Jun. 30, 2021	May 13, 2021
Assets acquired:
Goodwill	$ 615,342	$ 612,934
Series of Individually Immaterial Business Acquisitions
Assets acquired:
Inventories	3,976
Property and equipment	79,556
Goodwill	2,408
Total assets	85,940
Liabilities assumed:
Total liabilities	371
Net assets acquired and total purchase price	$ 85,569
Buchanan Energy
Assets acquired:
Cash and cash equivalents					$ 5,092
Receivables					225
Inventories					18,516
Prepaid expenses					150
Property and equipment					306,818
Intangible assets acquired					31,100
Deferred income taxes					1,343
Finance lease right-of-use assets					9,421
Operating lease right-of-use assets					11,236
Other assets					1,774
Goodwill					254,679
Total assets					640,354
Liabilities assumed:
Accounts payable					30,212
Accrued expenses					8,395
Finance lease liabilities					11,101
Operating lease liabilities					15,087
Other long-term liabilities					3,717
Total liabilities					68,512
Net assets acquired and total purchase price					$ 571,842
Circle K
Assets acquired:
Inventories				$ 5,299
Property and equipment				6,150
Deferred income taxes				316
Finance lease right-of-use assets				37,086
Operating lease right-of-use assets				24,113
Goodwill				31,346
Total assets				104,310
Liabilities assumed:
Accrued expenses				545
Finance lease liabilities				46,576
Operating lease liabilities				15,773
Total liabilities				62,894
Net assets acquired and total purchase price				$ 41,416
Pilot
Assets acquired:
Cash and cash equivalents			$ 95
Inventories			6,556
Prepaid expenses			87
Property and equipment			67,365
Deferred income taxes			311
Operating lease right-of-use assets			28,002
Goodwill			154,223
Total assets			256,639
Liabilities assumed:
Accrued expenses			883
Operating lease liabilities			29,132
Total liabilities			30,015
Net assets acquired and total purchase price			$ 226,624