Leases - Major Tenants - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2022 Property Lease Tenant	Mar. 31, 2021
Leases [Line Items]
Number of significant tenants | Tenant	2
Subsidiaries of Global Partners LP (NYSE GLP) [Member]
Leases [Line Items]
Number of leased properties | Property	150
Number of unitary leases guaranteed by the parent | Lease	3
Subsidiaries of Global Partners LP (NYSE GLP) [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Leases [Line Items]
Lease revenue percentage	15.00%	15.00%
Subsidiaries of ARKO Corp. (NASDAQ: ARKO) [Member]
Leases [Line Items]
Number of leased properties | Property	128
Number of unitary leases guaranteed by the parent | Lease	4
Subsidiaries of ARKO Corp. (NASDAQ: ARKO) [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Leases [Line Items]
Lease revenue percentage	15.00%	15.00%
Apro, LLC (d/b/a United Oil) [Member]
Leases [Line Items]
Number of leased properties | Property	78
Number Of Unitary Leases To Tenant | Lease	3
Apro, LLC (d/b/a United Oil) [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Leases [Line Items]
Lease revenue percentage	12.00%	12.00%