Receivable - Marketing And Reservation System Fees (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Receivable - marketing and reservation fees	$ 42,179	$ 54,014
Depreciation and amortization	8,226	8,024	8,342
Interest expense	27,189	12,939	6,680
Marketing And Reservation Fees
Depreciation and amortization	14,500	13,300	12,400
Interest expense	4,000	4,100	1,100
Cumulative Marketing Expenses In Excess Of Cumulative Marketing Fee Revenues
Receivable - marketing and reservation fees	7,900	18,500
Cumulative Reservation Expenses In Excess Of Cumulative Reservation Fee Revenues
Receivable - marketing and reservation fees	$ 34,200	$ 35,500