Management Agreements and Leases (Details)	12 Months Ended
	Dec. 31, 2020 travelCenter property hotel tenant agreement	Dec. 31, 2019 hotel	Sep. 20, 2019 tenant
Management Agreements and Leases [Line Items]
Number of properties | travelCenter	1,109
Number of operating agreements | agreement	7
Number of tenants | tenant			279
Net Lease Property
Management Agreements and Leases [Line Items]
Number of properties | property	799
Number of tenants | tenant	170
Hotel
Management Agreements and Leases [Line Items]
Number of operating agreements | agreement	6
Number of properties leased to taxable REIT subsidiaries | hotel	305
Number of real estate properties to be sold or rebranded | hotel	5	2
Hotel | Minimum
Management Agreements and Leases [Line Items]
Number of real estate properties leased or managed | property	1
Hotel management agreements and leases, renewal period	1 year
Hotel | Maximum
Management Agreements and Leases [Line Items]
Hotel management agreements and leases, renewal period	60 years