Business Combinations and Acquisition and Disposition of Hotel Properties - Properties Acquired (Details) $ in Thousands						6 Months Ended
	Jul. 16, 2019 USD ($)	May 29, 2019 USD ($)	Feb. 22, 2019 USD ($)	Feb. 14, 2019 USD ($)	Nov. 30, 2018 hotel_room property	Jun. 30, 2019 USD ($) hotel_room	Jun. 30, 2018 USD ($)
Business Acquisition [Line Items]
Guest Rooms						14,463
Proceeds from sales of hotel properties | $						$ 302,323	$ 0
Hotel Palomar Washington DC
Business Acquisition [Line Items]
Proceeds from sales of hotel properties | $			$ 141,500
The Liaison Capitol Hill
Business Acquisition [Line Items]
Proceeds from sales of hotel properties | $				$ 111,000
Onyx Hotel
Business Acquisition [Line Items]
Proceeds from sales of hotel properties | $		$ 58,300
Hotel Amarano Burbank | Subsequent event
Business Acquisition [Line Items]
Proceeds from sales of hotel properties | $	$ 72,900
LaSalle Hotel Properties
Business Acquisition [Line Items]
Number of hotel properties acquired | property					36
Guest Rooms					8,420
LaSalle Hotel Properties | Villa Florence San Francisco on Union Square
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					189
LaSalle Hotel Properties | Hotel Vitale
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					200
LaSalle Hotel Properties | The Marker San Francisco
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					208
LaSalle Hotel Properties | Hotel Spero
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					236
LaSalle Hotel Properties | Chaminade Resort & Spa
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					156
LaSalle Hotel Properties | Harbor Court Hotel San Francisco
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					131
LaSalle Hotel Properties | Viceroy Santa Monica Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					162
LaSalle Hotel Properties | Le Parc Suite Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					154
LaSalle Hotel Properties | Montrose West Hollywood
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					133
LaSalle Hotel Properties | Chamberlain West Hollywood Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					115
LaSalle Hotel Properties | Grafton on Sunset
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					108
LaSalle Hotel Properties | The Westin Copley Place, Boston
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					803
LaSalle Hotel Properties | The Liberty, A Luxury Collection Hotel, Boston
Business Acquisition [Line Items]
Ownership Interest					99.99%
Guest Rooms					298
LaSalle Hotel Properties | Hyatt Regency Boston Harbor
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					270
LaSalle Hotel Properties | Sofitel Washington DC Lafayette Square
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					237
LaSalle Hotel Properties | George Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					139
LaSalle Hotel Properties | Mason & Rook Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					178
LaSalle Hotel Properties | Donovan Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					193
LaSalle Hotel Properties | Rouge Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					137
LaSalle Hotel Properties | Topaz Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					99
LaSalle Hotel Properties | Hotel Madera
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					82
LaSalle Hotel Properties | Paradise Point Resort & Spa
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					462
LaSalle Hotel Properties | Hilton San Diego Gaslamp Quarter
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					286
LaSalle Hotel Properties | Solamar Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					235
LaSalle Hotel Properties | L'Auberge Del Mar
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					121
LaSalle Hotel Properties | Hilton San Diego Resort & Spa
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					357
LaSalle Hotel Properties | The Heathman Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					151
LaSalle Hotel Properties | Southernmost Beach Resort
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					262
LaSalle Hotel Properties | The Marker Key West
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					96
LaSalle Hotel Properties | The Roger New York
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					194
LaSalle Hotel Properties | Hotel Chicago Downtown, Autograph Collection
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					354
LaSalle Hotel Properties | The Westin Michigan Avenue Chicago
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					752
LaSalle Hotel Properties | Hotel Palomar Washington DC
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					335
LaSalle Hotel Properties | The Liaison Capitol Hill
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					343
LaSalle Hotel Properties | Onyx Hotel
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					112
LaSalle Hotel Properties | Hotel Amarano Burbank
Business Acquisition [Line Items]
Ownership Interest					100.00%
Guest Rooms					132