Hotel Operating Revenue, Departmental Expenses and Other Property Related Costs - Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Hotel Operating Revenue, Departmental Expenses, and Other Property-Related Costs [Line Items]
Percentage of nearly all revenue composed of hotel operating revenue	100.00%
Hotel Development and Other Property Related Costs [Member]
Hotel Operating Revenue, Departmental Expenses, and Other Property-Related Costs [Line Items]
Hotel compensation and benefit expenses	$ 288.6	$ 279.9	$ 271.2
Percentage of nearly all revenue composed of hotel operating revenue	100.00%