Management Agreements and Leases - Other, Net Lease Portfolio and TA Leases (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2021	Mar. 31, 2021 USD ($) ft² hotel tenant brand industry agreement travel_center	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Management Agreements and Leases [Line Items]
Cash (used in) provided by operating activities		$ (62,724)	$ 97,016
Rental income		$ 92,217	100,273
Square feet | ft²		45,745
Number of operating agreements | agreement		7
Adjustments necessary to record rent on straight line basis		$ (1,883)	(3,543)
Capital improvements from leased facilities, funded		$ 21,891	31,343
COVID-19
Management Agreements and Leases [Line Items]
Percent of collected rents		93.10%
Deferred rent agreement		$ 1,228
Number of newly entered deferred rent agreements | tenant		5,000
Amount of deferred annual minimum rents		$ 10,605
Number of rent deferral agreements | tenant		45
Temporary rent assistance as a percentage of total rental income		2.80%
Reserves for uncollectible amounts against rental income		$ 4,785	1,115
Reserves for uncollectible rents		$ 23,051		$ 18,230
COVID-19 | Subsequent event
Management Agreements and Leases [Line Items]
Percent of collected rents	97.70%
COVID-19 | Minimum
Management Agreements and Leases [Line Items]
Deferred rent repayment period		12 months
COVID-19 | Maximum
Management Agreements and Leases [Line Items]
Deferred rent repayment period		24 months
Hotel
Management Agreements and Leases [Line Items]
Number of operating agreements | agreement		6
Hotel | InterContinental Hotels Group, plc
Management Agreements and Leases [Line Items]
Number of properties owned | hotel		103
Hotel | IHG Agreement
Management Agreements and Leases [Line Items]
Cash (used in) provided by operating activities		$ 1,502
Realized returns and rents		54,085
Rental income		$ 455
Net Lease Property
Management Agreements and Leases [Line Items]
Square feet | ft²		13,452,608
Operating agreement annual rent and return		$ 375,811
Weighted average remaining lease term		10 years 8 months 12 days
Percentage of portfolio leased by tenants		98.50%
Number of brands | brand		130
Number of industries | industry		21
Travel centers | Travel Centers of America
Management Agreements and Leases [Line Items]
Rental income		$ 62,077	61,528
Number of properties owned | travel_center		179
Operating agreement annual rent and return		$ 246,110
Quarterly payments to deferred rent receivable		4,404	4,404
Remaining balance of previously deferred rents		35,228
Adjustments necessary to record rent on straight line basis		(3,305)	(3,344)
Accruals for unpaid rent, including deferred rent		52,620		$ 55,530
Deferred rent receivable from TA agreement, during the period		$ 1,386	$ 725
Increase in annual rent fixed interest rate		8.50%
Travel centers | Travel Centers of America | Annual minimum rents | Customer concentration risk
Management Agreements and Leases [Line Items]
Percentage of total annual minimum rents		26.70%
Travel centers | Travel Centers of America | TA agreements
Management Agreements and Leases [Line Items]
Number of operating agreements | agreement		5