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Stockholders' Equity and Stock Incentive Plans (Classification of Costs) (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | $ 9,709,000 |  | $ 8,927,000 |
Stock Repurchase Program, Authorized Amount | 100,000,000 |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 78,900,000 |  |  |
Dividends, Share-based Compensation | 0.06 | $ 0.06 | 0.05 | $ 0.05
Stock Repurchased and Retired During Period, Value | $ 21,653,000 |  | $ 19,803,000 |
Average Repurchase Price per Share | $ 26.09 |  | $ 35.42 |
Common Stock |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock Repurchased and Retired During Period, Shares | 830,100 |  | 559,089 |
Release of performance stock units, net of tax | 270,960 |  | 337,537 |
Stock Repurchased and Retired During Period, Value | $ 8,000 |  | $ 6,000 |
Gaming Expense [Member] |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | 194,000 |  | 172,000 |
Food and Beverage Expense [Member] |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | 37,000 |  | 33,000 |
Room Expense [Member] |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | 18,000 |  | 15,000 |
Selling, General and Administrative Expenses [Member] |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | 988,000 |  | 872,000 |
Corporate Expense [Member] |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | $ 8,472,000 |  | $ 7,835,000 |

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