Sale of Hotel Properties (Schedule of Properties Disposed) (Details) - room	Mar. 31, 2018	Mar. 27, 2018	Feb. 21, 2018
Embassy Suites Boston Marlborough [Member]
Discontinued operations
Property disposed, number of rooms			229
Sheraton Philadelphia Society Hill Hotel [Member]
Discontinued operations
Property disposed, number of rooms		364
Disposals 2018 [Member]
Discontinued operations
Property disposed, number of rooms	593