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Condensed Consolidating Financial Information (Balance Sheets) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and cash equivalents | $ 440,963 | $ 203,104 | $ 158,832 | $ 193,862
Restricted cash | 33,596 | 24,175 | 26,705 | 16,488
Other current assets | 107,545 | 101,384 |  |
Property and equipment, net | 2,547,005 | 2,539,786 |  |
Investments in subsidiaries | 0 | 0 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 99,960 | 86,311 |  |
Intangible assets, net | 844,222 | 842,946 |  |
Goodwill, net | 1,201,862 | 888,224 |  |
Total assets | 5,275,153 | 4,685,930 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Long-term Debt, Current Maturities | 18,007 | 23,981 |  |
Other current liabilities | 407,846 | 361,490 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 0 | 0 |  |
Long-term debt, net of current maturities and debt issuance costs | 3,531,076 | 3,051,899 |  |
Other long-term liabilities | 176,389 | 151,333 |  |
Total stockholders' equity (deficit) | 1,141,835 | 1,097,227 | $ 1,030,438 | $ 930,180
Total liabilities and stockholders' equity | 5,275,153 | 4,685,930 |  |
Subsidiary, BAC [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Restricted cash | 0 | 0 |  |
Other current assets | 234 | 234 |  |
Property and equipment, net | 0 | 0 |  |
Investments in subsidiaries | 0 | 0 |  |
Intercompany receivable | 374,065 | 373,718 |  |
Other assets, net | 0 | 0 |  |
Intangible assets, net | 0 | 0 |  |
Goodwill, net | 0 | 0 |  |
Total assets | 374,299 | 373,952 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Long-term Debt, Current Maturities | 0 | 0 |  |
Other current liabilities | 0 | 0 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 0 | 0 |  |
Long-term debt, net of current maturities and debt issuance costs | 0 | 0 |  |
Other long-term liabilities | 900 | 900 |  |
Total stockholders' equity (deficit) | 373,399 | 373,052 |  |
Total liabilities and stockholders' equity | 374,299 | 373,952 |  |
Parent |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 257,199 | 347 |  |
Restricted cash | 0 | 0 |  |
Other current assets | 81,149 | 78,226 |  |
Property and equipment, net | 108,002 | 88,464 |  |
Investments in subsidiaries | 5,587,729 | 4,913,592 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 30,514 | 14,725 |  |
Intangible assets, net | 0 | 0 |  |
Goodwill, net | 0 | 0 |  |
Total assets | 6,064,593 | 5,095,354 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Long-term Debt, Current Maturities | 17,921 | 23,895 |  |
Other current liabilities | 164,388 | 130,030 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 1,303,777 | 888,444 |  |
Long-term debt, net of current maturities and debt issuance costs | 3,530,192 | 3,051,481 |  |
Other long-term liabilities | (93,520) | (95,723) |  |
Total stockholders' equity (deficit) | 1,141,835 | 1,097,227 |  |
Total liabilities and stockholders' equity | 6,064,593 | 5,095,354 |  |
Guarantor Subsidiaries [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 162,607 | 199,574 |  |
Restricted cash | 17,243 | 14,389 |  |
Other current assets | 18,325 | 20,687 |  |
Property and equipment, net | 2,357,101 | 2,424,361 |  |
Investments in subsidiaries | 0 | 0 |  |
Intercompany receivable | 1,976,784 | 1,560,841 |  |
Other assets, net | 29,970 | 33,369 |  |
Intangible assets, net | 816,999 | 818,887 |  |
Goodwill, net | 887,442 | 887,442 |  |
Total assets | 6,266,471 | 5,959,550 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Long-term Debt, Current Maturities | 86 | 86 |  |
Other current liabilities | 206,624 | 212,146 |  |
Accumulated losses of subsidiaries in excess of investment | 20,173 | 73,130 |  |
Intercompany payable | 0 | 0 |  |
Long-term debt, net of current maturities and debt issuance costs | 320 | 418 |  |
Other long-term liabilities | 279,385 | 256,584 |  |
Total stockholders' equity (deficit) | 5,759,883 | 5,417,186 |  |
Total liabilities and stockholders' equity | 6,266,471 | 5,959,550 |  |
Non-Guarantor Subsidiaries (100% Owned) |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 21,157 | 3,183 |  |
Restricted cash | 16,353 | 9,786 |  |
Other current assets | 8,385 | 2,782 |  |
Property and equipment, net | 81,902 | 26,961 |  |
Investments in subsidiaries | 3,604 | 18,097 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 39,476 | 38,217 |  |
Intangible assets, net | 27,223 | 24,059 |  |
Goodwill, net | 314,420 | 782 |  |
Total assets | 512,520 | 123,867 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Long-term Debt, Current Maturities | 0 | 0 |  |
Other current liabilities | 36,773 | 19,578 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 1,047,404 | 1,046,114 |  |
Long-term debt, net of current maturities and debt issuance costs | 564 | 0 |  |
Other long-term liabilities | (10,376) | (10,428) |  |
Total stockholders' equity (deficit) | (561,845) | (931,397) |  |
Total liabilities and stockholders' equity | 512,520 | 123,867 |  |
Non-Guarantor Subsidiaries (Not 100% Owned) |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Restricted cash | 0 | 0 |  |
Other current assets | 0 | 0 |  |
Property and equipment, net | 0 | 0 |  |
Investments in subsidiaries | 0 | 0 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 0 | 0 |  |
Intangible assets, net | 0 | 0 |  |
Goodwill, net | 0 | 0 |  |
Total assets | 0 | 0 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Long-term Debt, Current Maturities | 0 | 0 |  |
Other current liabilities | 0 | 0 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 0 | 0 |  |
Long-term debt, net of current maturities and debt issuance costs | 0 | 0 |  |
Other long-term liabilities | 0 | 0 |  |
Total stockholders' equity (deficit) | 0 | 0 |  |
Total liabilities and stockholders' equity | 0 | 0 |  |
Eliminations |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Restricted cash | 0 | 0 |  |
Other current assets | (548) | (545) |  |
Property and equipment, net | 0 | 0 |  |
Investments in subsidiaries | (5,591,333) | (4,931,689) |  |
Intercompany receivable | (2,350,849) | (1,934,559) |  |
Other assets, net | 0 | 0 |  |
Intangible assets, net | 0 | 0 |  |
Goodwill, net | 0 | 0 |  |
Total assets | (7,942,730) | (6,866,793) |  |
Liabilities and Stockholders’ Equity |  |  |  |
Long-term Debt, Current Maturities | 0 | 0 |  |
Other current liabilities | 61 | (264) |  |
Accumulated losses of subsidiaries in excess of investment | (20,173) | (73,130) |  |
Intercompany payable | (2,351,181) | (1,934,558) |  |
Long-term debt, net of current maturities and debt issuance costs | 0 | 0 |  |
Other long-term liabilities | 0 | 0 |  |
Total stockholders' equity (deficit) | (5,571,437) | (4,858,841) |  |
Total liabilities and stockholders' equity | $ (7,942,730) | $ (6,866,793) |  |

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