Summary of Significant Accounting Policies (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012
Property and Equipment, Net
Salvage value	0
Buildings
Property and Equipment, Net
Useful lives of property and equipment	30 years
Hotel systems | Minimum
Property and Equipment, Net
Useful lives of property and equipment	1 year 6 months
Hotel systems | Maximum
Property and Equipment, Net
Useful lives of property and equipment	7 years
Other equipment | Minimum
Property and Equipment, Net
Useful lives of property and equipment	3 years
Other equipment | Maximum
Property and Equipment, Net
Useful lives of property and equipment	10 years