Management Agreements and Leases - Sonesta Agreement (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) hotel option	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Capital improvements from leased facilities, funded			$ 131,120	$ 187,652	$ 180,703
Sonesta International Hotels Corporation
Property Subject to or Available for Operating Lease [Line Items]
Number of real estate properties leased or managed | hotel			49
Hotels | Sonesta International Hotels Corporation
Property Subject to or Available for Operating Lease [Line Items]
Reimbursement of capital expenditures			$ 4,582	2,416	3,968
Sonesta agreements | Hotels
Property Subject to or Available for Operating Lease [Line Items]
Fixed minimum return as a percentage of invested capital			8.00%
Operating agreement annual rent and return			$ 109,632
Realized returns and rents			$ 70,576	59,618	50,442
Percentage of reservation fee			1.50%
Percentage of system fee for centralized services			1.50%
Percentage of procurement and construction supervision fee			3.00%
Percentage of incentive fee			20.00%
Marketing and reservation system fees			$ 28,238	24,194	21,482
Procurement and construction supervisory fees			1,080	1,468	1,607
Capital improvements from leased facilities, funded			$ 34,933	$ 54,105	$ 56,649
Number of renewal options available | option			2
Renewal period			15 years
Agreement period before right to terminate agreement without cause			3 years
Minimum return or termination			6.00%
Full service hotels | Hotels | Sonesta International Hotels Corporation
Property Subject to or Available for Operating Lease [Line Items]
Number of real estate properties leased or managed | hotel			10
Full service hotels | Sonesta agreements | Hotels
Property Subject to or Available for Operating Lease [Line Items]
Property management fees, percentage of gross revenue			3.00%
Limited services hotels | Hotels | Sonesta International Hotels Corporation
Property Subject to or Available for Operating Lease [Line Items]
Number of real estate properties leased or managed | hotel			39
Limited services hotels | Sonesta agreements | Hotels
Property Subject to or Available for Operating Lease [Line Items]
Property management fees, percentage of gross revenue			5.00%
Forecast | Sonesta agreements | Hotels
Property Subject to or Available for Operating Lease [Line Items]
Capital improvements from leased facilities, funded	$ 57,000	$ 126,000