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Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2018
Item Effected [Line Items] |
Schedule of Cash and Cash Equivalents and Restricted Cash [Table Text Block] | The following table provides a reconciliation of cash, cash equivalents and restricted cash balances reported within the condensed consolidated balance sheets to the total balance shown in the condensed consolidated statements of cash flows.
| March 31, |  | December 31, |  | March 31, |  | December 31,
(In thousands) | 2018 |  | 2017 |  | 2017 |  | 2016
Cash and cash equivalents | $ | 179,706 |  |  | $ | 203,104 |  |  | $ | 167,007 |  |  | $ | 193,862 |
Restricted cash | 25,794 |  |  | 24,175 |  |  | 22,047 |  |  | 16,488 |
Total cash, cash equivalents and restricted cash | $ | 205,500 |  |  | $ | 227,279 |  |  | $ | 189,054 |  |  | $ | 210,350 |
Schedule of Promotional Allowances [Table Text Block] | The estimated retail value related to goods and services provided to guests without charge or upon redemption of points under our player loyalty programs, included in departmental revenues, and therefore reducing our gaming revenues, are as follows:
| Three Months Ended
| March 31,
(In thousands) | 2018 |  | 2017
Food and beverage | $ | 42,638 |  |  | $ | 42,814 |
Rooms | 19,000 |  |  | 18,590 |
Other | 2,580 |  |  | 2,528 |
Schedule of Cash Flows Adjustments [Table Text Block] | The effects of adopting Update 2016-18 on our condensed consolidated statement of cash flows for the three months ended March 31, 2017 were as follows:
| Three Months Ended March 31, 2017
(In thousands) | As Previously Reported |  | Adoption of Update 2016-18 |  | As Adjusted
Net cash provided by operating activities | $ | 112,045 |  |  | $ | 5,559 |  |  | $ | 117,604 |
Cash, cash equivalents and restricted cash, beginning of period | $ | 193,862 |  |  | $ | 16,488 |  |  | $ | 210,350 |
Net increase (decrease) in cash, cash equivalents and restricted cash | (26,855 | ) |  | 5,559 |  |  | (21,296 | )
Cash, cash equivalents and restricted cash, end of period | $ | 167,007 |  |  | $ | 22,047 |  |  | $ | 189,054 |
Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block] | The effects of the adoption of the Revenue Standard on our results for the three months ended March 31, 2017 are as follows:
| Three Months Ended March 31, 2017
(In thousands, except per share data) | As Previously Reported |  | Adoption of Revenue Standard |  | As Adjusted
Revenues |  |  |  |  |
Gaming | $ | 499,999 |  |  | $ | (56,054 | ) |  | $ | 443,945 |
Food and beverage | 87,443 |  |  | (838 | ) |  | 86,605 |
Room | 47,326 |  |  | (476 | ) |  | 46,850 |
Other | 34,038 |  |  | (1,373 | ) |  | 32,665 |
Gross revenues | 668,806 |  |  | (58,741 | ) |  | 610,065 |
Less promotional allowances | 63,464 |  |  | (63,464 | ) |  | — |
Net revenues | 605,342 |  |  | 4,723 |  |  | 610,065 |
Operating costs and expenses |  |  |  |  |
Gaming | 231,631 |  |  | (39,698 | ) |  | 191,933 |
Food and beverage | 49,518 |  |  | 34,830 |  |  | 84,348 |
Room | 13,114 |  |  | 8,193 |  |  | 21,307 |
Other | 19,979 |  |  | 1,436 |  |  | 21,415 |
Selling, general and administrative | 91,613 |  |  | — |  |  | 91,613 |
Maintenance and utilities | 26,399 |  |  | — |  |  | 26,399 |
Depreciation and amortization | 53,964 |  |  | — |  |  | 53,964 |
Corporate expense | 20,798 |  |  | — |  |  | 20,798 |
Project development, preopening and writedowns | 2,972 |  |  | — |  |  | 2,972 |
Other operating items, net | 486 |  |  | — |  |  | 486 |
Total operating costs and expenses | 510,474 |  |  | 4,761 |  |  | 515,235 |
Operating income | 94,868 |  |  | (38 | ) |  | 94,830 |
Other expense (income) |  |  |  |  |
Interest income | (460 | ) |  | — |  |  | (460 | )
Interest expense, net of amounts capitalized | 43,674 |  |  | — |  |  | 43,674 |
Loss on early extinguishments and modifications of debt | 156 |  |  | — |  |  | 156 |
Other, net | 111 |  |  | — |  |  | 111 |
Total other expense, net | 43,481 |  |  | — |  |  | 43,481 |
Income from continuing operations before income taxes | 51,387 |  |  | (38 | ) |  | 51,349 |
Income tax provision | (16,273 | ) |  | — |  |  | (16,273 | )
Income from continuing operations, net of tax | 35,114 |  |  | (38 | ) |  | 35,076 |
Income from discontinued operations, net of tax | 375 |  |  | — |  |  | 375 |
Net income | $ | 35,489 |  |  | $ | (38 | ) |  | $ | 35,451 |
Basic net income per common share |  |  |  |  |
Continuing operations | $ | 0.31 |  |  | $ | — |  |  | $ | 0.31 |
Discontinued operations | — |  |  | — |  |  | — |
Basic net income per common share | $ | 0.31 |  |  | $ | — |  |  | $ | 0.31 |
Weighted average basic shares outstanding | 115,269 |  |  | — |  |  | 115,269 |
Diluted net income per common share |  |  |  |  |
Continuing operations | $ | 0.31 |  |  | $ | — |  |  | $ | 0.31 |
Discontinued operations | — |  |  | — |  |  | — |
Diluted net income per common share | $ | 0.31 |  |  | $ | — |  |  | $ | 0.31 |
Weighted average diluted shares outstanding | 115,902 |  |  | — |  |  | 115,902 |

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