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Summary of Significant Accounting Policies Organization (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total stockholders' equity (deficit) | $ 1,141,835 | $ 1,030,438 | $ 1,141,835 | $ 1,030,438 | $ 1,097,227 | $ 930,180
Deferred income taxes | 109,508 |  | 109,508 |  | 86,657 |
Accrued liabilities | 313,303 |  | 313,303 |  | 255,146 |
Gaming | 446,760 | 428,852 | 1,335,011 | 1,309,922 |  |
Food & beverage | 86,006 | 84,996 | 259,006 | 259,245 |  |
Room | 47,984 | 47,600 | 145,330 | 142,284 |  |
Other | 31,446 | 30,094 | 95,760 | 94,280 |  |
Gross Revenues | 612,196 | 591,542 | 1,835,107 | 1,805,731 |  |
Promotional Allowances |  | 0 |  | 0 |  |
Revenue, Net | 612,196 | 591,542 | 1,835,107 | 1,805,731 |  |
Gaming | 197,435 | 188,044 | 580,461 | 569,597 |  |
Food & beverage | 82,179 | 82,942 | 246,488 | 251,717 |  |
Room | 22,288 | 21,845 | 64,875 | 64,594 |  |
Other | 21,149 | 19,966 | 63,599 | 62,500 |  |
Selling, general and administrative | 88,054 | 91,288 | 263,678 | 275,938 |  |
Maintenance and utilities | 32,927 | 30,244 | 89,526 | 82,507 |  |
Depreciation, Depletion and Amortization, Nonproduction | 54,688 | 55,201 | 159,887 | 161,728 |  |
Corporate expense | 25,055 | 19,339 | 74,975 | 63,388 |  |
Project development, preopening and writedowns | 18,588 | 2,975 | 27,829 | 8,731 |  |
Other operating items, net | 265 | 758 | 2,196 | 1,707 |  |
Costs and Expenses | 542,628 | 512,602 | 1,574,507 | 1,542,407 |  |
Operating Income (Loss) | 69,568 | 78,940 | 260,600 | 263,324 |  |
Interest income | (2,189) | (452) | (3,168) | (1,367) |  |
Interest Expense | 54,670 | 43,309 | 143,888 | 129,711 |  |
Gain Loss on Early Retirements of Debt |  | 319 |  | 853 |  |
Other Nonoperating Income (Expense) | 16 | (139) | (388) | 531 |  |
Nonoperating Income (Expense) | 52,497 | 43,037 | 140,393 | 129,728 |  |
Income from continuing operations before income taxes | 17,071 | 35,903 | 120,207 | 133,596 |  |
Income tax provision | (5,234) | (12,746) | (28,373) | (47,671) |  |
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  | 23,157 |  | 85,925 |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 | 0 | 347 | 21,392 |  |
Net income | $ 11,837 | $ 23,157 | $ 92,181 | $ 107,317 |  |
Continuing operations | $ 0.10 | $ 0.20 | $ 0.81 | $ 0.74 |  |
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share |  | 0.00 |  | 0.19 |  |
Basic net income per common share | $ 0.10 | $ 0.20 | $ 0.81 | $ 0.93 |  |
Weighted average basic shares outstanding | 114,410 | 114,836 | 114,443 | 115,108 |  |
Continuing operations | $ 0.10 | $ 0.20 | $ 0.80 | $ 0.75 |  |
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share |  | 0.00 |  | 0.18 |  |
Diluted net income per common share | $ 0.10 | $ 0.20 | $ 0.80 | $ 0.93 |  |
Weighted average diluted shares outstanding | 115,070 | 115,501 | 115,147 | 115,768 |  |
As Previously Reported [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Gaming |  | $ 487,372 |  | $ 1,482,427 |  |
Food & beverage |  | 85,640 |  | 261,425 |  |
Room |  | 48,073 |  | 143,669 |  |
Other |  | 31,639 |  | 98,592 |  |
Gross Revenues |  | 652,724 |  | 1,986,113 |  |
Promotional Allowances |  | 65,059 |  | 193,238 |  |
Revenue, Net |  | 587,665 |  | 1,792,875 |  |
Gaming |  | 229,667 |  | 691,210 |  |
Food & beverage |  | 47,487 |  | 146,538 |  |
Room |  | 13,475 |  | 40,058 |  |
Other |  | 18,566 |  | 58,176 |  |
Selling, general and administrative |  | 91,288 |  | 275,938 |  |
Maintenance and utilities |  | 30,244 |  | 82,507 |  |
Depreciation, Depletion and Amortization, Nonproduction |  | 55,201 |  | 161,728 |  |
Corporate expense |  | 19,339 |  | 63,388 |  |
Project development, preopening and writedowns |  | 2,975 |  | 8,731 |  |
Other operating items, net |  | 758 |  | 1,707 |  |
Costs and Expenses |  | 509,000 |  | 1,529,981 |  |
Operating Income (Loss) |  | 78,665 |  | 262,894 |  |
Interest income |  | (452) |  | (1,367) |  |
Interest Expense |  | 43,309 |  | 129,711 |  |
Gain Loss on Early Retirements of Debt |  | 319 |  | 853 |  |
Other Nonoperating Income (Expense) |  | (139) |  | 531 |  |
Nonoperating Income (Expense) |  | 43,037 |  | 129,728 |  |
Income from continuing operations before income taxes |  | 35,628 |  | 133,166 |  |
Income tax provision |  | (12,652) |  | (47,515) |  |
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  | 22,976 |  | 85,651 |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  | 0 |  | 21,392 |  |
Net income |  | $ 22,976 |  | $ 107,043 |  |
Continuing operations |  | $ 0.20 |  | $ 0.74 |  |
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share |  | 0.00 |  | 0.19 |  |
Basic net income per common share |  | $ 0.20 |  | $ 0.93 |  |
Weighted average basic shares outstanding |  | 114,836 |  | 115,108 |  |
Continuing operations |  | $ 0.20 |  | $ 0.74 |  |
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share |  | 0.00 |  | 0.18 |  |
Diluted net income per common share |  | $ 0.20 |  | $ 0.92 |  |
Weighted average diluted shares outstanding |  | 115,501 |  | 115,768 |  |
Adjustments [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total stockholders' equity (deficit) |  |  |  |  | 3,800 |
Deferred income taxes |  |  |  |  | 2,400 |
Accrued liabilities |  |  |  |  | $ 6,200 |
Gaming |  | $ (58,520) |  | $ (172,505) |  |
Food & beverage |  | (644) |  | (2,180) |  |
Room |  | (473) |  | (1,385) |  |
Other |  | (1,545) |  | (4,312) |  |
Gross Revenues |  | (61,182) |  | (180,382) |  |
Promotional Allowances |  | (65,059) |  | (193,238) |  |
Revenue, Net |  | 3,877 |  | 12,856 |  |
Gaming |  | (41,623) |  | (121,613) |  |
Food & beverage |  | 35,455 |  | 105,179 |  |
Room |  | 8,370 |  | 24,536 |  |
Other |  | 1,400 |  | 4,324 |  |
Selling, general and administrative |  | 0 |  | 0 |  |
Maintenance and utilities |  | 0 |  | 0 |  |
Depreciation, Depletion and Amortization, Nonproduction |  | 0 |  | 0 |  |
Corporate expense |  | 0 |  | 0 |  |
Project development, preopening and writedowns |  | 0 |  | 0 |  |
Other operating items, net |  | 0 |  | 0 |  |
Costs and Expenses |  | 3,602 |  | 12,426 |  |
Operating Income (Loss) |  | 275 |  | 430 |  |
Interest income |  | 0 |  | 0 |  |
Interest Expense |  | 0 |  | 0 |  |
Gain Loss on Early Retirements of Debt |  | 0 |  | 0 |  |
Other Nonoperating Income (Expense) |  | 0 |  | 0 |  |
Nonoperating Income (Expense) |  | 0 |  | 0 |  |
Income from continuing operations before income taxes |  | 275 |  | 430 |  |
Income tax provision |  | (94) |  | (156) |  |
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  | 181 |  | 274 |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  | 0 |  | 0 |  |
Net income |  | $ 181 |  | $ 274 |  |
Continuing operations |  | $ 0.00 |  | $ 0.00 |  |
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share |  | 0.00 |  | 0.00 |  |
Basic net income per common share |  | $ 0.00 |  | $ 0.00 |  |
Weighted average basic shares outstanding |  | 0 |  | 0 |  |
Continuing operations |  | $ 0.00 |  | $ 0.01 |  |
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share |  | 0.00 |  | 0.00 |  |
Diluted net income per common share |  | $ 0.00 |  | $ 0.01 |  |
Weighted average diluted shares outstanding |  | 0 |  | 0 |  |
Adjustments for Change in Accounting Principle [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Income tax provision |  |  | $ (300) |  |  |

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