Organization (Schedule of Distribution of Consolidated Hotels) (Details)	Sep. 30, 2012 Rooms
Real Estate Properties [Line Items]
Number of rooms (in rooms)	19,335
Consolidated Hotels [Member]
Real Estate Properties [Line Items]
Number of hotels (in hotels)	66
Number of rooms (in rooms)	19,164
Embassy Suites Hotels® [Member] | Consolidated Hotels [Member]
Real Estate Properties [Line Items]
Number of hotels (in hotels)	35
Number of rooms (in rooms)	9,116
Holiday Inn® [Member] | Consolidated Hotels [Member]
Real Estate Properties [Line Items]
Number of hotels (in hotels)	13
Number of rooms (in rooms)	4,388
Sheraton® and Westin® [Member] | Consolidated Hotels [Member]
Real Estate Properties [Line Items]
Number of hotels (in hotels)	6
Number of rooms (in rooms)	2,224
Doubletree® and Hilton® [Member] | Consolidated Hotels [Member]
Real Estate Properties [Line Items]
Number of hotels (in hotels)	6
Number of rooms (in rooms)	1,450
Marriott® and Renaissance® [Member] | Consolidated Hotels [Member]
Real Estate Properties [Line Items]
Number of hotels (in hotels)	3
Number of rooms (in rooms)	1,321
Fairmont® [Member] | Consolidated Hotels [Member]
Real Estate Properties [Line Items]
Number of hotels (in hotels)	1
Number of rooms (in rooms)	383
Independent (Morgans/Royalton) [Member] | Consolidated Hotels [Member]
Real Estate Properties [Line Items]
Number of hotels (in hotels)	2
Number of rooms (in rooms)	282