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Condensed Consolidating Financial Information (Balance Sheets) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | --- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Cash and cash equivalents | $ 158,821 |  | $ 145,341 | $ 177,838 | $ 192,545
Other current assets | 98,411 |  | 96,609 |  |
Property and equipment, net | 2,225,342 |  | 2,286,108 |  |
Investments in subsidiaries | 244,621 | $ 221,400 | 222,717 |  |
Intercompany receivable | 0 |  | 0 |  |
Other assets, net | 48,341 |  | 52,050 |  |
Assets |  |  |  |  |
Intangible assets, net | 890,054 |  | 934,249 | 1,070,660 | 1,119,638
Goodwill, net | 685,310 |  | 685,310 |  |
Assets | 4,350,900 |  | 4,422,384 |  |
Liabilities and Stockholders’ Equity |  |  |  |  |
Current maturities of long-term debt | 29,750 |  | 29,753 |  |
Current liabilities | 325,321 |  | 327,442 |  |
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 | 3,239,799 |  | 3,375,098 |  |
Other long-term liabilities | 248,019 |  | 252,004 |  |
Preferred stock | 0 |  | 0 |  |
Common stock | 1,117 |  | 1,093 |  |
Additional paid-in capital | 945,041 |  | 922,112 |  |
Retained earnings (deficit) | (437,881) |  | (485,115) |  |
Accumulated other comprehensive income (loss) | (316) |  | (53) |  |
Total Boyd Gaming Corporation stockholders’ equity | 507,961 |  | 438,037 |  |
Noncontrolling interest | 50 |  | 50 | 180,450 | 163,336
Total stockholders’ equity | 508,011 |  | 438,087 | 650,437 | 467,127
Total liabilities and stockholders’ equity | 4,350,900 |  | 4,422,384 |  |
Boyd |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Cash and cash equivalents | 2 |  | 2 | 0 | 2,520
Other current assets | 14,602 |  | 10,234 |  |
Property and equipment, net | 68,515 |  | 65,365 |  |
Investments in subsidiaries | 3,547,690 |  | 3,345,735 |  |
Intercompany receivable | 0 |  | 0 |  |
Other assets, net | 12,521 |  | 12,595 |  |
Assets |  |  |  |  |
Intangible assets, net | 0 |  | 0 |  |
Goodwill, net | 0 |  | 0 |  |
Assets | 3,643,330 |  | 3,433,931 |  |
Liabilities and Stockholders’ Equity |  |  |  |  |
Current maturities of long-term debt | 21,500 |  | 21,500 |  |
Current liabilities | 102,946 |  | 82,711 |  |
Accumulated losses of subsidiaries in excess of investment | 0 |  | 0 |  |
Intercompany payable | 720,400 |  | 668,310 |  |
Long-term debt, net of current maturities and debt issuance costs | 2,255,800 |  | 2,183,485 |  |
Other long-term liabilities | 34,723 |  | 39,888 |  |
Common stock | 1,117 |  | 1,093 |  |
Additional paid-in capital | 945,041 |  | 922,112 |  |
Retained earnings (deficit) | (437,881) |  | (485,115) |  |
Accumulated other comprehensive income (loss) | (316) |  | (53) |  |
Total Boyd Gaming Corporation stockholders’ equity | 507,961 |  | 438,037 |  |
Noncontrolling interest | 0 |  | 0 |  |
Total stockholders’ equity | 507,961 |  | 438,037 |  |
Total liabilities and stockholders’ equity | 3,643,330 |  | 3,433,931 |  |
Guarantor Subsidiaries |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Cash and cash equivalents | 124,426 |  | 111,452 | 106,445 | 118,714
Other current assets | 61,157 |  | 69,012 |  |
Property and equipment, net | 1,745,203 |  | 1,775,486 |  |
Investments in subsidiaries | 138,116 |  | 150,694 |  |
Intercompany receivable | 1,867,783 |  | 1,637,101 |  |
Other assets, net | 8,982 |  | 9,149 |  |
Assets |  |  |  |  |
Intangible assets, net | 406,540 |  | 425,083 |  |
Goodwill, net | 212,794 |  | 212,794 |  |
Assets | 4,565,001 |  | 4,390,771 |  |
Liabilities and Stockholders’ Equity |  |  |  |  |
Current maturities of long-term debt | 0 |  | 0 |  |
Current liabilities | 146,178 |  | 160,542 |  |
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 | 154,633 |  | 169,824 |  |
Total Boyd Gaming Corporation stockholders’ equity | 4,264,190 |  | 4,060,405 |  |
Noncontrolling interest | 0 |  | 0 |  |
Total stockholders’ equity | 4,264,190 |  | 4,060,405 |  |
Total liabilities and stockholders’ equity | 4,565,001 |  | 4,390,771 |  |
Non-Guarantor Subsidiaries (100% Owned) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Cash and cash equivalents | 34,172 |  | 33,668 | 33,766 | 36,619
Other current assets | 23,660 |  | 21,980 |  |
Property and equipment, net | 411,624 |  | 445,257 |  |
Investments in subsidiaries | 0 |  | 0 |  |
Intercompany receivable | 0 |  | 0 |  |
Other assets, net | 26,838 |  | 30,306 |  |
Assets |  |  |  |  |
Intangible assets, net | 483,514 |  | 509,166 |  |
Goodwill, net | 472,516 |  | 472,516 |  |
Assets | 1,452,324 |  | 1,512,893 |  |
Liabilities and Stockholders’ Equity |  |  |  |  |
Current maturities of long-term debt | 8,250 |  | 8,253 |  |
Current liabilities | 76,482 |  | 84,427 |  |
Accumulated losses of subsidiaries in excess of investment | 3,192 |  | 3,619 |  |
Intercompany payable | 1,147,082 |  | 972,425 |  |
Long-term debt, net of current maturities and debt issuance costs | 983,999 |  | 1,191,613 |  |
Other long-term liabilities | 58,663 |  | 42,292 |  |
Total Boyd Gaming Corporation stockholders’ equity | (825,344) |  | (789,736) |  |
Noncontrolling interest | 0 |  | 0 |  |
Total stockholders’ equity | (825,344) |  | (789,736) |  |
Total liabilities and stockholders’ equity | 1,452,324 |  | 1,512,893 |  |
Non-Guarantor Subsidiaries (Not 100% Owned) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Cash and cash equivalents | 221 |  | 219 | 37,627 | 34,692
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 |  |
Assets | 221 |  | 219 |  |
Liabilities and Stockholders’ Equity |  |  |  |  |
Current maturities of long-term debt | 0 |  | 0 |  |
Current liabilities | 0 |  | 0 |  |
Accumulated losses of subsidiaries in excess of investment | 0 |  | 0 |  |
Intercompany payable | 475 |  | 397 |  |
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) |  | (178) |  |
Noncontrolling interest | 0 |  | 0 |  |
Total stockholders’ equity | (254) |  | (178) |  |
Total liabilities and stockholders’ equity | 221 |  | 219 |  |
Eliminations |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Cash and cash equivalents | 0 |  | 0 | $ 0 | $ 0
Other current assets | (1,008) |  | (4,617) |  |
Property and equipment, net | 0 |  | 0 |  |
Investments in subsidiaries | (3,441,185) |  | (3,273,712) |  |
Intercompany receivable | (1,867,783) |  | (1,637,101) |  |
Other assets, net | 0 |  | 0 |  |
Assets |  |  |  |  |
Intangible assets, net | 0 |  | 0 |  |
Goodwill, net | 0 |  | 0 |  |
Assets | (5,309,976) |  | (4,915,430) |  |
Liabilities and Stockholders’ Equity |  |  |  |  |
Current maturities of long-term debt | 0 |  | 0 |  |
Current liabilities | (285) |  | (238) |  |
Accumulated losses of subsidiaries in excess of investment | (3,192) |  | (3,619) |  |
Intercompany payable | (1,867,957) |  | (1,641,132) |  |
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 | (3,438,592) |  | (3,270,491) |  |
Noncontrolling interest | 50 |  | 50 |  |
Total stockholders’ equity | (3,438,542) |  | (3,270,441) |  |
Total liabilities and stockholders’ equity | $ (5,309,976) |  | $ (4,915,430) |  |

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