Management Agreements and Leases - Other Net Lease Agreements and Additional Lease Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 triple_net_property	Sep. 30, 2019 USD ($)	Sep. 30, 2019 lease_agreement	Jan. 01, 2019 USD ($)
Management Agreements and Leases [Line Items]
Total revenues	$ 599,772	$ 603,153	$ 1,735,242	$ 1,743,737
Number of properties on leased land					1		15
Lease liability						$ 76,224
Adjustments necessary to record rent on straight line basis	(3,046)	3,136	(7,368)	9,359
Accounting Standards Update 2016-02
Management Agreements and Leases [Line Items]
Right of use asset						75,746		$ 77,010
Lease liability						$ 76,224		$ 77,010
Hotel
Management Agreements and Leases [Line Items]
Number of properties on leased land | lease_agreement							14
Rental expense related to operating leases	$ 3,601		10,594
Travel centers | Land
Management Agreements and Leases [Line Items]
Rental expense related to operating leases			$ 419
Lease term	14 years		14 years
Travel centers | Land | Minimum
Management Agreements and Leases [Line Items]
Lease term	3 years		3 years
Travel centers | Land | Maximum
Management Agreements and Leases [Line Items]
Lease term	31 years		31 years
SMTA Transaction
Management Agreements and Leases [Line Items]
Adjustments necessary to record rent on straight line basis		258	$ 258
Rental income
Management Agreements and Leases [Line Items]
Total revenues	$ 73,619	$ 81,322	210,509	$ 245,543
Rental income | SMTA Transaction
Management Agreements and Leases [Line Items]
Total revenues	$ 5,485		$ 5,485