Management Agreements and Leases - Other, Net Lease Portfolio and TA Leases (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) ft² industry brand travelCenter property agreement tenant hotel	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) ft² industry brand travelCenter property agreement tenant hotel	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Management Agreements and Leases [Line Items]
Cash provided by (used in) operating activities			$ 147,114	$ 1,002
Number of operating agreements | agreement	6		6
Rental income	$ 97,798	$ 98,724	$ 290,949	286,742
Adjustments necessary to record rent on straight line basis	(1,845)	(905)	(5,530)	(3,087)
Reserves recorded (reduced) for uncollectible amounts against rental income		(5,373)		588
COVID-19
Management Agreements and Leases [Line Items]
Reserves recorded (reduced) for uncollectible amounts against rental income	352		(315)
Reserves for uncollectible rents	7,755		7,755		$ 15,519
SMTA Transaction
Management Agreements and Leases [Line Items]
Rental income	33,787	36,608	102,669	99,594
Adjustments necessary to record rent on straight line basis	$ 1,395	2,361	$ 4,296	6,702
Net Lease
Management Agreements and Leases [Line Items]
Number of properties owned | property	769		769
Number of tenants | tenant	178		178
Net Lease | TravelCenters of America Inc.
Management Agreements and Leases [Line Items]
Number of properties owned | travelCenter	179		179
Travel Centers of America
Management Agreements and Leases [Line Items]
Deferred percentage rental income recognized	$ 1,861		$ 1,861
Deferred percentage rental income	$ 831	1,849	$ 6,168	4,827
Hotels and net lease properties
Management Agreements and Leases [Line Items]
Square feet | ft²	13,412,371		13,412,371
Hotels | IHG Agreement
Management Agreements and Leases [Line Items]
Cash provided by (used in) operating activities	$ 1,273	962	$ 2,610	(384)
Hotels | IHG Agreement | Ravinia, GA
Management Agreements and Leases [Line Items]
Number of properties owned | hotel	1		1
Net Lease
Management Agreements and Leases [Line Items]
Operating agreement annual rent and return			$ 372,601
Weighted average remaining lease term	8 years 9 months 18 days		8 years 9 months 18 days
Percentage of portfolio leased by tenants	98.10%		98.10%
Number of brands | brand	136		136
Number of industries | industry	21		21
Net Lease | Real Estate Investment Property At Cost | Credit Concentration Risk | Travel Centers of America
Management Agreements and Leases [Line Items]
Percentage of total annual minimum rents			29.20%
Travel centers | Travel Centers of America
Management Agreements and Leases [Line Items]
Operating agreement annual rent and return			$ 246,110
Quarterly payments to deferred rent receivable	$ 4,404	13,212	4,404	13,212
Remaining balance of previously deferred rents	8,807		8,807		22,018
Rental income	64,011	62,116	188,280	186,357
Adjustments necessary to record rent on straight line basis	3,240	$ 3,267	9,825	$ 9,789
Accruals for unpaid rent, including deferred rent	$ 33,874		$ 33,874		$ 48,168
Increase in annual rent fixed interest rate			8.50%
Travel centers | Travel Centers of America | TA agreements
Management Agreements and Leases [Line Items]
Number of operating agreements | agreement	5		5