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Debt - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 15, 2026
Jan. 31, 2026
USD ($)
Site
May 31, 2012
Jun. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Site
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity       $ 248,500,000 $ 248,500,000    
Cash paid for interest, including debt and finance lease obligations         $ 21,300,000 $ 24,600,000  
Finance Lease Obligations [Member]              
Debt Instrument [Line Items]              
Weighted average discount rate, percent       6.00% 6.00%    
Increases in finance lease obligations and right-of-use assets         $ 56,300,000    
Interest on finance lease obligation       $ 900,000 1,200,000 $ 100,000  
Finance Lease Obligations [Member] | Getty Realty Corporation [Member]              
Debt Instrument [Line Items]              
Lessee leasing arrangements, operating leases, term of contract     15 years        
Lease extended period of lease     20 years        
Number of gas stations leased | Site   106         106
Percentage increase annual fixed rent payments   1.50%         1.50%
Annual rent   $ 6,900,000          
Lessee, Finance Lease, Existence of Option to Extend [true false]   true          
Number of sites accounting for finance lease | Site   25          
Number of remaining sites accounting for finance lease | Site   81          
Maximum [Member] | Finance Lease Obligations [Member] | Getty Realty Corporation [Member]              
Debt Instrument [Line Items]              
Number of additional sites | Site   25          
Purchase price of additional units   $ 6,600,000          
Number of additional sites purchase option | Site   9          
Number of sites option to recapture | Site   6          
Minimum [Member] | Finance Lease Obligations [Member]              
Debt Instrument [Line Items]              
Percentage increase of fair value at lease inception exceeds total fair value real property             25.00%
Credit Facility [Member]              
Debt Instrument [Line Items]              
Letters of credit outstanding, amount       $ 4,900,000 $ 4,900,000   $ 4,900,000
Credit Facility [Member] | Notes Payable to Banks [Member]              
Debt Instrument [Line Items]              
Line of credit facility, interest rate at period end       5.50% 5.50%   5.60%
Debt instrument, basis spread on variable rate         2.00%   2.00%
Credit Facility [Member] | Maximum [Member]              
Debt Instrument [Line Items]              
Line of credit facility financial covenants combined leverage ratio 5.00%            
Line of credit facility financial covenants combined leverage ratio, thereafter 4.75%            
Credit Facility [Member] | Minimum [Member]              
Debt Instrument [Line Items]              
Line of credit facility financial covenants combined leverage ratio 1.00%            
Line of credit facility financial covenants combined leverage ratio, thereafter 1.00%