Management Agreements and Leases - Sonesta (Details) $ in Thousands		1 Months Ended	3 Months Ended
	Feb. 27, 2020 USD ($)	May 31, 2020 USD ($)	Mar. 31, 2020 USD ($) hotel unit	Mar. 31, 2019 USD ($)	Feb. 26, 2020 USD ($)
Management Agreements and Leases [Line Items]
Aggregate undepreciated carrying value of real estate			$ 11,501,576
Capital improvements from leased facilities, funded			31,343	$ 11,738
Equity in earnings (losses) of an investee			(718)	404
Sonesta agreements
Management Agreements and Leases [Line Items]
Percent of gross revenues from hotel operations placed in escrow	5.00%
Equity method investments, carrying value			46,481
Amount of cost basis exceeding book value			8,000
Equity in earnings (losses) of an investee			(718)
Unamortized balance			(41,793)
Decrease in hotel operating expense			$ 207
Sonesta Int'l Hotels Corp
Management Agreements and Leases [Line Items]
Noncontrolling interest, ownership percentage			34.00%
Hotel | Sonesta agreements
Management Agreements and Leases [Line Items]
Operating agreement annual rent and return			$ 118,941
Hotel net income (loss)			$ (8,146)
Percentage increase in minimum returns			8.00%
Realized returns and rents				14,161
Percent payment of hotel cash flows			80.00%
Related party transaction, management marketing and reservation system fees			$ 6,779	8,523
Procurement and construction supervision fees			633	405
Capital improvements from leased facilities, funded			29,036	10,467
Increase in annual minimum returns			2,141	484
Hotel | Sonesta ES Suites
Management Agreements and Leases [Line Items]
Aggregate undepreciated carrying value of real estate	$ 461,263
Hotel | Sonesta ES Suites | Sonesta agreements
Management Agreements and Leases [Line Items]
Operating agreement annual rent and return	$ 48,239
Hotel | Sonesta Int'l Hotels Corp
Management Agreements and Leases [Line Items]
Due to related party, reimbursement of capital expenditures and other			$ 13,323	$ 9,226
Hotel | Subsequent event | Sonesta agreements
Management Agreements and Leases [Line Items]
Requested working capital advances		$ 7,408
Hotel | Full service hotel | Sonesta agreements
Management Agreements and Leases [Line Items]
Number of real estate properties leased or managed	69,013				99,013
Hotel | Full service hotel | Sonesta Int'l Hotels Corp
Management Agreements and Leases [Line Items]
Number of real estate properties leased or managed | hotel			14
Hotel | Limited services hotel | Sonesta Int'l Hotels Corp
Management Agreements and Leases [Line Items]
Number of real estate properties leased or managed | hotel			39
Vacation units | Wyndham Destinations Agreement
Management Agreements and Leases [Line Items]
Number of units leased | unit			48