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Summary of Significant Accounting Policies (Promotional Allowances) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Allowances [Line Items]      
Promotional allowances $ 242,645 $ 416,874 $ 461,473
Cost of promotional allowances 181,612 242,031 263,316
Rooms      
Allowances [Line Items]      
Promotional allowances 77,177 132,231 147,305
Cost of promotional allowances 35,605 53,167 58,960
Food and Beverage      
Allowances [Line Items]      
Promotional allowances 150,598 190,632 207,072
Cost of promotional allowances 133,717 168,626 181,689
Other Products and Services      
Allowances [Line Items]      
Promotional allowances 14,870 94,011 107,096
Cost of promotional allowances $ 12,290 $ 20,238 $ 22,667