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Summary of Significant Accounting Policies -Revenue Recognition, Player Loyalty Programs, and Gaming and Racing Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Revenue Recognition and Promotional Allowances |  |
Promotional allowances | $ 41,858 | $ 40,571
Cost of complimentary services | 13,753 | 13,465
Gaming and Racing Taxes |  |
Gaming expense | 244,400 | 243,200
Rooms |  |
Revenue Recognition and Promotional Allowances |  |
Promotional allowances | 9,196 | 9,122
Cost of complimentary services | 1,268 | 1,197
Food And Beverage |  |
Revenue Recognition and Promotional Allowances |  |
Promotional allowances | 30,566 | 29,521
Cost of complimentary services | 11,631 | 11,523
Other |  |
Revenue Recognition and Promotional Allowances |  |
Promotional allowances | 2,096 | 1,928
Cost of complimentary services | $ 854 | $ 745

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