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Condensed Consolidating Financial Information (Income Statements) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue, Net | $ 612,196 | $ 591,542 | $ 1,835,107 | $ 1,805,731 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 323,051 | 312,797 | 955,423 | 948,408 |  |  |  |
Selling, general and administrative | 88,054 | 91,288 | 263,678 | 275,938 |  |  |  |
Maintenance and utilities | 32,927 | 30,244 | 89,526 | 82,507 |  |  |  |
Depreciation and amortization | 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 |  |  |  |
Asset Impairment Charges | 0 | 0 | 993 | 0 |  |  |  |
Other operating items, net | 265 | 758 | 2,196 | 1,707 |  |  |  |
Intercompany Expense | 0 | 0 | 0 | 0 |  |  |  |
Total operating costs and expenses | 542,628 | 512,602 | 1,574,507 | 1,542,407 |  |  |  |
Equity in Earnings of Subsidiaries | 0 | 0 | 0 | 0 |  |  |  |
Operating income | 69,568 | 78,940 | 260,600 | 263,324 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 52,481 | 42,857 | 140,720 | 128,344 |  |  |  |
Loss on early extinguishments and modifications of debt | 0 | 319 | 61 | 853 |  |  |  |
Other Nonoperating Income (Expense) | 16 | (139) | (388) | 531 |  |  |  |
Total other expense (income), net | 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 from continuing operations, net of tax | 11,837 | 23,157 | 91,834 | 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 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 11,975 | 22,852 | 91,049 | 108,118 |  |  |  |
Subsidiary, BAC [Member] |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue, Net | 0 | 0 | 0 | 0 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 0 | 0 | 0 | 0 |  |  |  |
Selling, general and administrative | 0 | 0 | 0 | 0 |  |  |  |
Maintenance and utilities | 0 | 0 | 0 | 0 |  |  |  |
Depreciation and amortization | 0 | 0 | 0 | 0 |  |  |  |
Corporate expense | 0 | 0 | 0 | 0 |  |  |  |
Project development, preopening and writedowns | 0 | 0 | 0 | 154 |  |  |  |
Asset Impairment Charges | 0 |  | 0 | 0 |  |  |  |
Other operating items, net | 0 | 0 | 0 | 0 |  |  |  |
Intercompany Expense | 0 | 0 | 0 | 0 |  |  |  |
Total operating costs and expenses | 0 | 0 | 0 | 154 |  |  |  |
Equity in Earnings of Subsidiaries | 0 | 0 | 0 | 0 |  |  |  |
Operating income | 0 | 0 | 0 | (154) |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net |  | 0 |  | 0 |  |  |  |
Loss on early extinguishments and modifications of debt | 0 | 0 | 0 | 0 |  |  |  |
Other Nonoperating Income (Expense) | 0 | 0 | 0 | 0 |  |  |  |
Total other expense (income), net | 0 | 0 | 0 | 0 |  |  |  |
Income from continuing operations before income taxes | 0 | 0 | 0 | (154) |  |  |  |
Income tax provision | 0 | 0 | 0 | 0 |  |  |  |
Income from continuing operations, net of tax | 0 |  | 0 | (154) |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 |  | 347 | 21,392 |  |  |  |
Net income | 0 | 0 | 347 | 21,238 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 0 | 0 | 347 | 21,238 |  |  |  |
Parent |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue, Net | 20,168 | 17,827 | 62,295 | 55,027 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 0 | 0 | 0 | 0 |  |  |  |
Selling, general and administrative | 4 | 0 | 12 | 23 |  |  |  |
Maintenance and utilities | 0 | 0 | 0 | 0 |  |  |  |
Depreciation and amortization | 4,975 | 3,219 | 13,158 | 8,745 |  |  |  |
Corporate expense | 24,212 | 18,758 | 72,712 | 61,128 |  |  |  |
Project development, preopening and writedowns | 12,194 | 1,252 | 16,337 | 3,979 |  |  |  |
Asset Impairment Charges | 0 |  | 993 | 0 |  |  |  |
Other operating items, net | 10 | 127 | 58 | 352 |  |  |  |
Intercompany Expense | 50 | 301 | 152 | 903 |  |  |  |
Total operating costs and expenses | 41,445 | 23,657 | 103,422 | 75,130 |  |  |  |
Equity in Earnings of Subsidiaries | 71,509 | 55,712 | 235,518 | 207,689 |  |  |  |
Operating income | 50,232 | 49,882 | 194,391 | 187,586 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 52,185 | 42,544 | 139,858 | 127,344 |  |  |  |
Loss on early extinguishments and modifications of debt |  | 319 | 61 | 853 |  |  |  |
Other Nonoperating Income (Expense) | 38 | 18 | 33 | 538 |  |  |  |
Total other expense (income), net | 52,223 | 42,881 | 139,952 | 128,735 |  |  |  |
Income from continuing operations before income taxes | (1,991) | 7,001 | 54,439 | 58,851 |  |  |  |
Income tax provision | 13,828 | 16,156 | 37,742 | 48,466 |  |  |  |
Income from continuing operations, net of tax | 11,837 |  | 92,181 | 107,317 |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 |  | 0 | 0 |  |  |  |
Net income | 11,837 | 23,157 | 92,181 | 107,317 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 11,975 | 22,852 | 91,049 | 108,118 |  |  |  |
Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue, Net | 590,390 | 586,272 | 1,798,921 | 1,788,579 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 301,811 | 303,380 | 912,036 | 919,949 |  |  |  |
Selling, general and administrative | 84,767 | 89,438 | 256,401 | 270,168 |  |  |  |
Maintenance and utilities | 32,257 | 29,839 | 88,186 | 81,451 |  |  |  |
Depreciation and amortization | 47,351 | 50,934 | 142,126 | 149,904 |  |  |  |
Corporate expense | 94 | 273 | 310 | 1,012 |  |  |  |
Project development, preopening and writedowns | 889 | 646 | 2,079 | 2,073 |  |  |  |
Asset Impairment Charges | 0 |  | 0 | 0 |  |  |  |
Other operating items, net | 255 | 631 | 2,138 | 1,355 |  |  |  |
Intercompany Expense | 24,737 | 22,345 | 76,137 | 68,740 |  |  |  |
Total operating costs and expenses | 492,161 | 497,486 | 1,479,413 | 1,494,652 |  |  |  |
Equity in Earnings of Subsidiaries | (524) | (559) | (1,095) | (857) |  |  |  |
Operating income | 97,705 | 88,227 | 318,413 | 293,070 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 288 | 306 | 842 | 981 |  |  |  |
Loss on early extinguishments and modifications of debt |  | 0 | 0 | 0 |  |  |  |
Other Nonoperating Income (Expense) | (5) | (139) | (371) | 45 |  |  |  |
Total other expense (income), net | 283 | 167 | 471 | 1,026 |  |  |  |
Income from continuing operations before income taxes | 97,422 | 88,060 | 317,942 | 292,044 |  |  |  |
Income tax provision | (20,517) | (30,181) | (69,686) | (99,481) |  |  |  |
Income from continuing operations, net of tax | 76,905 |  | 248,256 | 192,563 |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 |  | 0 | 0 |  |  |  |
Net income | 76,905 | 57,879 | 248,256 | 192,563 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 77,043 | 57,574 | 247,124 | 193,364 |  |  |  |
Non-Guarantor Subsidiaries (100% Owned) |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue, Net | 26,426 | 10,089 | 50,192 | 31,791 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 21,240 | 9,417 | 43,387 | 28,459 |  |  |  |
Selling, general and administrative | 3,284 | 1,850 | 7,277 | 5,770 |  |  |  |
Maintenance and utilities | 670 | 405 | 1,340 | 1,056 |  |  |  |
Depreciation and amortization | 2,362 | 1,048 | 4,603 | 3,079 |  |  |  |
Corporate expense | 749 | 308 | 1,953 | 1,248 |  |  |  |
Project development, preopening and writedowns | 5,505 | 1,077 | 9,413 | 2,525 |  |  |  |
Asset Impairment Charges | 0 |  | 0 | 0 |  |  |  |
Other operating items, net | 0 | 0 | 0 | 0 |  |  |  |
Intercompany Expense | 0 | 0 | 0 | 0 |  |  |  |
Total operating costs and expenses | 33,810 | 14,105 | 67,973 | 42,137 |  |  |  |
Equity in Earnings of Subsidiaries | 0 | 0 | 0 | 0 |  |  |  |
Operating income | (7,384) | (4,016) | (17,781) | (10,346) |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 8 | 7 | 20 | 19 |  |  |  |
Loss on early extinguishments and modifications of debt |  | 0 | 0 | 0 |  |  |  |
Other Nonoperating Income (Expense) | (17) | (18) | (50) | (52) |  |  |  |
Total other expense (income), net | (9) | (11) | (30) | (33) |  |  |  |
Income from continuing operations before income taxes | (7,375) | (4,005) | (17,751) | (10,313) |  |  |  |
Income tax provision | 1,455 | 1,279 | 3,571 | 3,344 |  |  |  |
Income from continuing operations, net of tax | (5,920) |  | (14,180) | (6,969) |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 |  | 0 | 0 |  |  |  |
Net income | (5,920) | (2,726) | (14,180) | (6,969) |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | (5,920) | (2,726) | (14,180) | (6,969) |  |  |  |
Non-Guarantor Subsidiaries (Not 100% Owned) |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue, Net | 0 | 0 | 0 | 0 |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 0 | 0 | 0 | 0 |  |  |  |
Selling, general and administrative | 0 | 0 | 0 | 0 |  |  |  |
Maintenance and utilities | 0 | 0 | 0 | 0 |  |  |  |
Depreciation and amortization | 0 | 0 | 0 | 0 |  |  |  |
Corporate expense | 0 | 0 | 0 | 0 |  |  |  |
Project development, preopening and writedowns | 0 | 0 | 0 | 0 |  |  |  |
Asset Impairment Charges | 0 |  | 0 | 0 |  |  |  |
Other operating items, net | 0 | 0 | 0 | 0 |  |  |  |
Intercompany Expense | 0 | 0 | 0 | 0 |  |  |  |
Total operating costs and expenses | 0 | 0 | 0 | 0 |  |  |  |
Equity in Earnings of Subsidiaries | 0 | 0 | 0 | 0 |  |  |  |
Operating income | 0 | 0 | 0 | 0 |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 0 | 0 | 0 | 0 |  |  |  |
Loss on early extinguishments and modifications of debt |  | 0 | 0 | 0 |  |  |  |
Other Nonoperating Income (Expense) | 0 | 0 | 0 | 0 |  |  |  |
Total other expense (income), net | 0 | 0 | 0 | 0 |  |  |  |
Income from continuing operations before income taxes | 0 | 0 | 0 | 0 |  |  |  |
Income tax provision | 0 | 0 | 0 | 0 |  |  |  |
Income from continuing operations, net of tax | 0 |  | 0 | 0 |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 |  | 0 | 0 |  |  |  |
Net income | 0 | 0 | 0 | 0 |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 0 | 0 | 0 | 0 |  |  |  |
Eliminations |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue, Net | (24,788) | (22,646) | (76,301) | (69,666) |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Operating | 0 | 0 | 0 | 0 |  |  |  |
Selling, general and administrative | (1) | 0 | (12) | (23) |  |  |  |
Maintenance and utilities | 0 | 0 | 0 | 0 |  |  |  |
Depreciation and amortization | 0 | 0 | 0 | 0 |  |  |  |
Corporate expense | 0 | 0 | 0 | 0 |  |  |  |
Project development, preopening and writedowns | 0 | 0 | 0 | 0 |  |  |  |
Other operating items, net | 0 | 0 | 0 | 0 |  |  |  |
Intercompany Expense | (24,787) | (22,646) | (76,289) | (69,643) |  |  |  |
Total operating costs and expenses | (24,788) | (22,646) | (76,301) | (69,666) |  |  |  |
Equity in Earnings of Subsidiaries | (70,985) | (55,153) | (234,423) | (206,832) |  |  |  |
Operating income | (70,985) | (55,153) | (234,423) | (206,832) |  |  |  |
Other expense (income) |  |  |  |  |  |  |  |
Interest expense, net | 0 | 0 | 0 | 0 |  |  |  |
Loss on early extinguishments and modifications of debt |  | 0 | 0 | 0 |  |  |  |
Other Nonoperating Income (Expense) | 0 | 0 | 0 | 0 |  |  |  |
Total other expense (income), net | 0 | 0 | 0 | 0 |  |  |  |
Income from continuing operations before income taxes | (70,985) | (55,153) | (234,423) | (206,832) |  |  |  |
Income tax provision | 0 | 0 | 0 | 0 |  |  |  |
Income from continuing operations, net of tax | (70,985) |  | (234,423) | (206,832) |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 |  | 0 | 0 |  |  |  |
Net income | (70,985) | (55,153) | (234,423) | (206,832) |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | (71,123) | (54,848) | (233,291) | (207,633) |  |  |  |
Corporate expense |  |  |  |  |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Corporate expense | (20,475) | (17,480) | (57,375) | (53,850) |  |  |  |
Investments [Member] |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 15,817 | $ 17,823 | 15,817 | 17,823 | $ 15,591 | $ 17,752 | $ 17,456 | $ 17,259
Consolidation, Eliminations [Member] |  |  |  |  |  |  |  |
Costs and Expenses |  |  |  |  |  |  |  |
Asset Impairment Charges | $ 0 |  | $ 0 | $ 0 |  |  |  |

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