Business Combinations and Acquisition and Disposition of Hotel Properties - Properties Acquired (Details) $ in Thousands				3 Months Ended
	Feb. 22, 2019 USD ($)	Feb. 14, 2019 USD ($)	Nov. 30, 2018 hotel_room property	Mar. 31, 2019 USD ($) hotel_room	Mar. 31, 2018 USD ($)
Business Acquisition [Line Items]
Guest Rooms				14,575
Proceeds from sales of hotel properties | $				$ 245,096	$ 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
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 | Hotel Amarano Burbank
Business Acquisition [Line Items]
Ownership Interest			100.00%
Guest Rooms			132
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 | Onyx Hotel
Business Acquisition [Line Items]
Ownership Interest			100.00%
Guest Rooms			112
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