Management Agreements and Leases - Other, Net Lease Portfolio and TA Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) ft² travelCenter property lease brand industry tenant	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Management Agreements and Leases [Line Items]
Rental income	$ 100,014	$ 94,413
Adjustments necessary to record rent on straight line basis	5,768	(2,448)
Reserves for uncollectible amounts against rental income	665	3,540
COVID-19
Management Agreements and Leases [Line Items]
Reserves for uncollectible rents	4,101		$ 3,436
TravelCenters of America Inc.
Management Agreements and Leases [Line Items]
Monthly rent credit amount	$ 25,000
Lease term	10 years
BP Products North America Inc.
Management Agreements and Leases [Line Items]
Guarantee obligations	$ 3,037,475
Net Lease
Management Agreements and Leases [Line Items]
Operating agreement annual rent and return	$ 374,941
Percentage of portfolio leased by tenants	97.30%
Number of brands | brand	137
Number of industries | industry	21
Related Party
Management Agreements and Leases [Line Items]
Deferred percentage rental income	$ 0	2,385
Net Lease
Management Agreements and Leases [Line Items]
Number of properties owned | property	749
Square feet | ft²	13,384,219
Weighted average remaining lease term	8 years 8 months 12 days
Number of tenants | tenant	177
Net Lease | Travel Centers of America | Real Estate Investment Property At Cost | Credit Concentration Risk
Management Agreements and Leases [Line Items]
Percentage of total annual minimum rents	28.60%
Net Lease | Related Party | TravelCenters of America Inc.
Management Agreements and Leases [Line Items]
Number of properties owned | travelCenter	175
Travel centers | TravelCenters of America Inc.
Management Agreements and Leases [Line Items]
Operating agreement annual rent and return	$ 254,000
Rental income	67,834	62,141
Adjustments necessary to record rent on straight line basis	4,309	(3,241)
Accruals for unpaid rent, including deferred rent	$ 25,459		$ 19,816
TA agreements | Travel centers | TravelCenters of America Inc.
Management Agreements and Leases [Line Items]
Number of operating agreements | lease	5
SMTA Transaction
Management Agreements and Leases [Line Items]
Rental income	$ 32,180	32,272
Adjustments necessary to record rent on straight line basis	$ 1,459	$ 793