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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
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.
| June 30, |  | December 31, |  | June 30, |  | December 31,
(In thousands) | 2018 |  | 2017 |  | 2017 |  | 2016
Cash and cash equivalents | $ | 632,808 |  |  | $ | 203,104 |  |  | $ | 162,963 |  |  | $ | 193,862 |
Restricted cash | 26,112 |  |  | 24,175 |  |  | 21,640 |  |  | 16,488 |
Total cash, cash equivalents and restricted cash | $ | 658,920 |  |  | $ | 227,279 |  |  | $ | 184,603 |  |  | $ | 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 |  | Six Months Ended
| June 30, |  | June 30,
(In thousands) | 2018 |  | 2017 |  | 2018 |  | 2017
Food & beverage | $ | 43,285 |  |  | $ | 43,662 |  |  | $ | 85,923 |  |  | $ | 86,475 |
Rooms | 19,861 |  |  | 19,053 |  |  | 38,861 |  |  | 37,642 |
Other | 2,749 |  |  | 2,667 |  |  | 5,329 |  |  | 5,195 |
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 six months ended June 30, 2017 were as follows:
| Six Months Ended June 30, 2017
(In thousands) | As Previously Reported |  | Adoption of Update 2016-18 |  | As Adjusted
Net cash provided by operating activities | $ | 195,234 |  |  | $ | 5,152 |  |  | $ | 200,386 |
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 | (30,899 | ) |  | 5,152 |  |  | (25,747 | )
Cash, cash equivalents and restricted cash, end of period | $ | 162,963 |  |  | $ | 21,640 |  |  | $ | 184,603 |
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 June 30, 2017 are as follows:
| Three Months Ended June 30, 2017
(In thousands, except per share data) | As Previously Reported |  | Adoption of Revenue Standard |  | As Adjusted
Revenues |  |  |  |  |
Gaming | $ | 495,056 |  |  | $ | (57,931 | ) |  | $ | 437,125 |
Food & beverage | 88,342 |  |  | (698 | ) |  | 87,644 |
Room | 48,270 |  |  | (436 | ) |  | 47,834 |
Other | 32,915 |  |  | (1,394 | ) |  | 31,521 |
Gross revenues | 664,583 |  |  | (60,459 | ) |  | 604,124 |
Less promotional allowances | 64,715 |  |  | (64,715 | ) |  | — |
Net revenues | 599,868 |  |  | 4,256 |  |  | 604,124 |
Operating costs and expenses |  |  |  |  |
Gaming | 229,912 |  |  | (40,292 | ) |  | 189,620 |
Food & beverage | 49,533 |  |  | 34,894 |  |  | 84,427 |
Room | 13,469 |  |  | 7,973 |  |  | 21,442 |
Other | 19,631 |  |  | 1,488 |  |  | 21,119 |
Selling, general and administrative | 93,037 |  |  | — |  |  | 93,037 |
Maintenance and utilities | 25,864 |  |  | — |  |  | 25,864 |
Depreciation and amortization | 52,563 |  |  | — |  |  | 52,563 |
Corporate expense | 23,251 |  |  | — |  |  | 23,251 |
Project development, preopening and writedowns | 2,784 |  |  | — |  |  | 2,784 |
Other operating items, net | 463 |  |  | — |  |  | 463 |
Total operating costs and expenses | 510,507 |  |  | 4,063 |  |  | 514,570 |
Operating income | 89,361 |  |  | 193 |  |  | 89,554 |
Other expense (income) |  |  |  |  |
Interest income | (455 | ) |  | — |  |  | (455 | )
Interest expense, net of amounts capitalized | 42,728 |  |  | — |  |  | 42,728 |
Loss on early extinguishments and modifications of debt | 378 |  |  | — |  |  | 378 |
Other, net | 559 |  |  | — |  |  | 559 |
Total other expense, net | 43,210 |  |  | — |  |  | 43,210 |
Income from continuing operations before income taxes | 46,151 |  |  | 193 |  |  | 46,344 |
Income tax provision | (18,590 | ) |  | (62 | ) |  | (18,652 | )
Income from continuing operations, net of tax | 27,561 |  |  | 131 |  |  | 27,692 |
Income from discontinued operations, net of tax | 21,017 |  |  | — |  |  | 21,017 |
Net income | $ | 48,578 |  |  | $ | 131 |  |  | $ | 48,709 |
Basic net income per common share |  |  |  |  |
Continuing operations | $ | 0.24 |  |  | $ | — |  |  | $ | 0.24 |
Discontinued operations | 0.18 |  |  | — |  |  | 0.18 |
Basic net income per common share | $ | 0.42 |  |  | $ | — |  |  | $ | 0.42 |
Weighted average basic shares outstanding | 115,225 |  |  | — |  |  | 115,225 |
Diluted net income per common share |  |  |  |  |
Continuing operations | $ | 0.24 |  |  | $ | — |  |  | $ | 0.24 |
Discontinued operations | 0.18 |  |  | — |  |  | 0.18 |
Diluted net income per common share | $ | 0.42 |  |  | $ | — |  |  | $ | 0.42 |
Weighted average diluted shares outstanding | 115,923 |  |  | — |  |  | 115,923 |

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