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Condensed Consolidating Financial Information (Balance Sheets) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and cash equivalents | $ 249,417 | $ 203,104 | $ 193,862 | $ 158,821
Restricted cash | 23,785 | 24,175 | 16,488 | 19,030
Other current assets | 126,549 | 101,384 |  |
Investments in subsidiaries | 0 | 0 |  |
Property and equipment, net | 2,716,064 | 2,539,786 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 111,752 | 86,311 |  |
Intangible assets, net | 1,466,670 | 842,946 | 881,954 | 890,054
Goodwill | 1,062,102 | 888,224 | 826,476 | 685,310
Total assets | 5,756,339 | 4,685,930 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 24,181 | 23,981 |  |
Other current liabilities | 445,520 | 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 | 3,955,119 | 3,051,899 |  |
Other long-term liabilities | 185,778 | 151,333 |  |
Preferred stock | 0 | 0 |  |
Common stock | 1,118 | 1,126 |  |
Additional paid-in capital | 892,331 | 931,858 |  |
Retained earnings (deficit) | 253,357 | 164,425 |  |
Accumulated other comprehensive loss | (1,065) | (182) |  |
Total Boyd Gaming Corporation stockholders’ equity | 1,145,741 | 1,097,227 |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 1,145,741 | 1,097,227 | $ 930,180 | $ 501,837
Total liabilities and stockholders’ equity | 5,756,339 | 4,685,930 |  |
Boyd |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 8,697 | 347 |  |
Restricted cash | 0 | 0 |  |
Other current assets | 15,636 | 78,226 |  |
Investments in subsidiaries | 6,381,321 | 4,913,592 |  |
Property and equipment, net | 117,642 | 88,464 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 33,513 | 14,725 |  |
Intangible assets, net | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Total assets | 6,556,809 | 5,095,354 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 23,895 | 23,895 |  |
Other current liabilities | 160,262 | 130,030 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 1,509,857 | 888,444 |  |
Long-term debt, net of current maturities and debt issuance costs | 3,896,699 | 3,051,481 |  |
Other long-term liabilities | (179,645) | (95,723) |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 1,145,741 | 1,097,227 |  |
Total liabilities and stockholders’ equity | 6,556,809 | 5,095,354 |  |
Guarantor Subsidiaries |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 184,544 | 199,574 |  |
Restricted cash | 12,989 | 14,389 |  |
Other current assets | 77,846 | 20,687 |  |
Investments in subsidiaries | 0 | 0 |  |
Property and equipment, net | 2,332,685 | 2,424,361 |  |
Intercompany receivable | 2,091,963 | 1,560,841 |  |
Other assets, net | 29,395 | 33,369 |  |
Intangible assets, net | 816,369 | 818,887 |  |
Goodwill | 887,443 | 887,442 |  |
Total assets | 6,433,234 | 5,959,550 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 86 | 86 |  |
Other current liabilities | 202,025 | 212,146 |  |
Accumulated losses of subsidiaries in excess of investment | 9,459 | 73,130 |  |
Intercompany payable | 0 | 0 |  |
Long-term debt, net of current maturities and debt issuance costs | 318 | 418 |  |
Other long-term liabilities | 379,356 | 256,584 |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 5,841,990 | 5,417,186 |  |
Total liabilities and stockholders’ equity | 6,433,234 | 5,959,550 |  |
Subsidiary, BAC [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Restricted cash | 0 | 0 |  |
Other current assets | 191 | 234 |  |
Investments in subsidiaries | 0 | 0 |  |
Property and equipment, net | 0 | 0 |  |
Intercompany receivable | 374,108 | 373,718 |  |
Other assets, net | 0 | 0 |  |
Intangible assets, net | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Total assets | 374,299 | 373,952 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 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 |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 373,399 | 373,052 |  |
Total liabilities and stockholders’ equity | 374,299 | 373,952 |  |
Non-Guarantor Subsidiaries (100% Owned) |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 56,176 | 3,183 |  |
Restricted cash | 10,796 | 9,786 |  |
Other current assets | 33,067 | 2,782 |  |
Investments in subsidiaries | 3,861 | 18,097 |  |
Property and equipment, net | 265,737 | 26,961 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 48,844 | 38,217 |  |
Intangible assets, net | 650,301 | 24,059 |  |
Goodwill | 174,659 | 782 |  |
Total assets | 1,243,441 | 123,867 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 200 | 0 |  |
Other current liabilities | 82,904 | 19,578 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 956,457 | 1,046,114 |  |
Long-term debt, net of current maturities and debt issuance costs | 58,102 | 0 |  |
Other long-term liabilities | (14,833) | (10,428) |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 160,611 | (931,397) |  |
Total liabilities and stockholders’ equity | 1,243,441 | 123,867 |  |
Non-Guarantor Subsidiaries (Not 100% Owned) |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Restricted cash | 0 | 0 |  |
Other current assets | 0 | 0 |  |
Investments in subsidiaries | 0 | 0 |  |
Property and equipment, net | 0 | 0 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 0 | 0 |  |
Intangible assets, net | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Total assets | 0 | 0 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 0 | 0 |  |
Other current liabilities | 0 | 0 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 0 |  |  |
Long-term debt, net of current maturities and debt issuance costs | 0 | 0 |  |
Other long-term liabilities | 0 | 0 |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 0 | 0 |  |
Total liabilities and stockholders’ equity | 0 | 0 |  |
Eliminations [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Restricted cash | 0 | 0 |  |
Other current assets | (191) | (545) |  |
Investments in subsidiaries | (6,385,182) | (4,931,689) |  |
Property and equipment, net | 0 | 0 |  |
Intercompany receivable | (2,466,071) | (1,934,559) |  |
Other assets, net | 0 | 0 |  |
Intangible assets, net | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Total assets | (8,851,444) | (6,866,793) |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 0 | 0 |  |
Other current liabilities | 329 | (264) |  |
Accumulated losses of subsidiaries in excess of investment | (9,459) | (73,130) |  |
Intercompany payable | (2,466,314) | (1,934,558) |  |
Long-term debt, net of current maturities and debt issuance costs | 0 | 0 |  |
Other long-term liabilities | 0 | 0 |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | (6,376,000) | (4,858,841) |  |
Total liabilities and stockholders’ equity | $ (8,851,444) | $ (6,866,793) |  |

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