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Condensed Consolidating Financial Information (Balance Sheets) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | $ 203,104 | $ 193,862 | $ 158,821 | $ 145,341
Other current assets | 125,559 | 114,085 |  |
Property and equipment, net | 2,539,786 | 2,605,169 |  |
Investments in subsidiaries | 0 | 0 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 86,311 | 49,205 |  |
Assets |  |  |  |
Intangible assets, net | 842,946 | 881,954 | 890,054 | 934,249
Goodwill, net | 888,224 | 826,476 | 685,310 | 685,310
Total assets | 4,685,930 | 4,670,751 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 23,981 | 30,336 |  |
Other current liabilities | 355,323 | 335,168 |  |
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 | 3,051,899 | 3,199,119 |  |
Other long-term liabilities | 153,751 | 172,002 |  |
Preferred stock | 0 | 0 |  |
Common stock | 1,126 | 1,129 |  |
Additional paid-in capital | 931,858 | 953,440 |  |
Retained earnings (deficit) | 168,174 | (19,878) |  |
Accumulated other comprehensive income (loss) | (182) | (615) |  |
Total Boyd Gaming Corporation stockholders’ equity | 1,100,976 | 934,076 |  |
Noncontrolling interest | 0 | 50 |  |
Total stockholders’ equity | 1,100,976 | 934,126 | 508,011 | 438,087
Total liabilities and stockholders’ equity | 4,685,930 | 4,670,751 |  |
Boyd |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 347 | 1,212 | 2 | 2
Other current assets | 78,226 | 78,915 |  |
Property and equipment, net | 88,464 | 73,180 |  |
Investments in subsidiaries | 4,917,341 | 4,505,897 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 14,725 | 13,598 |  |
Assets |  |  |  |
Intangible assets, net | 0 | 0 |  |
Goodwill, net | 0 | 0 |  |
Total assets | 5,099,103 | 4,672,802 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 23,895 | 30,250 |  |
Other current liabilities | 130,030 | 93,762 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 0 |  |
Intercompany payable | 888,444 | 521,002 |  |
Long-term debt, net of current maturities and debt issuance costs | 3,051,481 | 3,198,613 |  |
Other long-term liabilities | (95,723) | (104,901) |  |
Total Boyd Gaming Corporation stockholders’ equity |  | 934,076 |  |
Noncontrolling interest |  | 0 |  |
Total stockholders’ equity | 1,100,976 | 934,076 |  |
Total liabilities and stockholders’ equity | 5,099,103 | 4,672,802 |  |
Guarantor Subsidiaries |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 199,574 | 189,364 | 156,116 | 143,580
Other current assets | 35,310 | 26,715 |  |
Property and equipment, net | 2,424,361 | 2,503,127 |  |
Investments in subsidiaries | 0 | 139,465 |  |
Intercompany receivable | 1,934,559 | 1,491,017 |  |
Other assets, net | 33,369 | 31,899 |  |
Assets |  |  |  |
Intangible assets, net | 818,887 | 857,894 |  |
Goodwill, net | 887,442 | 825,694 |  |
Total assets | 6,333,502 | 6,065,175 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 86 | 86 |  |
Other current liabilities | 205,994 | 196,391 |  |
Accumulated losses of subsidiaries in excess of investment | 73,130 | 0 |  |
Intercompany payable | 0 | 0 |  |
Long-term debt, net of current maturities and debt issuance costs | 418 | 506 |  |
Other long-term liabilities | 259,902 | 298,624 |  |
Total Boyd Gaming Corporation stockholders’ equity |  | 5,569,568 |  |
Noncontrolling interest |  | 0 |  |
Total stockholders’ equity | 5,793,972 | 5,569,568 |  |
Total liabilities and stockholders’ equity | 6,333,502 | 6,065,175 |  |
Non-Guarantor Subsidiaries (100% Owned) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 3,183 | 3,286 | 2,482 | 1,540
Other current assets | 12,568 | 8,908 |  |
Property and equipment, net | 26,961 | 28,862 |  |
Investments in subsidiaries | 18,097 | 0 |  |
Intercompany receivable | 0 | 0 |  |
Other assets, net | 38,217 | 3,708 |  |
Assets |  |  |  |
Intangible assets, net | 24,059 | 24,060 |  |
Goodwill, net | 782 | 782 |  |
Total assets | 123,867 | 69,606 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 0 | 0 |  |
Other current liabilities | 19,563 | 46,444 |  |
Accumulated losses of subsidiaries in excess of investment | 0 | 8,257 |  |
Intercompany payable | 1,046,114 | 968,811 |  |
Long-term debt, net of current maturities and debt issuance costs | 0 | 0 |  |
Other long-term liabilities | (10,428) | (21,721) |  |
Total Boyd Gaming Corporation stockholders’ equity |  | (932,185) |  |
Noncontrolling interest |  | 0 |  |
Total stockholders’ equity | (931,382) | (932,185) |  |
Total liabilities and stockholders’ equity | 123,867 | 69,606 |  |
Non-Guarantor Subsidiaries (Not 100% Owned) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 0 | 221 | 219
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 |  |
Assets |  |  |  |
Intangible assets, net | 0 | 0 |  |
Goodwill, net | 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 | 254 |  |
Long-term debt, net of current maturities and debt issuance costs | 0 | 0 |  |
Other long-term liabilities | 0 | 0 |  |
Total Boyd Gaming Corporation stockholders’ equity |  | (254) |  |
Noncontrolling interest |  | 0 |  |
Total stockholders’ equity | 0 | (254) |  |
Total liabilities and stockholders’ equity | 0 | 0 |  |
Eliminations [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 0 | $ 0 | $ 0
Other current assets | (545) | (453) |  |
Property and equipment, net | 0 | 0 |  |
Investments in subsidiaries | (4,935,438) | (4,645,362) |  |
Intercompany receivable | (1,934,559) | (1,491,017) |  |
Other assets, net | 0 | 0 |  |
Assets |  |  |  |
Intangible assets, net | 0 | 0 |  |
Goodwill, net | 0 | 0 |  |
Total assets | (6,870,542) | (6,136,832) |  |
Liabilities and Stockholders’ Equity |  |  |  |
Current maturities of long-term debt | 0 | 0 |  |
Other current liabilities | (264) | (1,429) |  |
Accumulated losses of subsidiaries in excess of investment | (73,130) | (8,257) |  |
Intercompany payable | (1,934,558) | (1,490,067) |  |
Long-term debt, net of current maturities and debt issuance costs | 0 | 0 |  |
Other long-term liabilities | 0 | 0 |  |
Total Boyd Gaming Corporation stockholders’ equity |  | (4,637,129) |  |
Noncontrolling interest |  | 50 |  |
Total stockholders’ equity | (4,862,590) | (4,637,079) |  |
Total liabilities and stockholders’ equity | $ (6,870,542) | $ (6,136,832) |  |

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