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Consolidation of Certain Interests (Borgata Results of Operations) (Details) (USD $)
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3 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2010
Borgata
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Dec. 31, 2010
Borgata
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| Condensed Financial Statements, Captions [Line Items] | |||||||||||||
| Gaming | $ 2,110,233,000 | $ 1,986,644,000 | $ 1,812,487,000 | $ 506,073,000 | |||||||||
| Food and beverage | 417,506,000 | 388,148,000 | 347,588,000 | 116,534,000 | |||||||||
| Room | 264,903,000 | 246,209,000 | 211,046,000 | 91,045,000 | |||||||||
| Other | 145,460,000 | 135,176,000 | 123,603,000 | 33,752,000 | |||||||||
| Gross revenues | 2,938,102,000 | 2,756,177,000 | 2,494,724,000 | 747,404,000 | |||||||||
| Less promotional allowances | 450,676,000 | 419,939,000 | 353,825,000 | 167,264,000 | |||||||||
| Net revenues | 625,842,000 | 613,279,000 | 615,222,000 | 633,083,000 | 606,674,000 | 590,215,000 | 574,403,000 | 564,946,000 | 2,487,426,000 | 2,336,238,000 | 2,140,899,000 | 580,140,000 | |
| Gaming | 1,011,064,000 | 924,451,000 | 859,818,000 | 203,962,000 | |||||||||
| Food and beverage | 219,921,000 | 200,165,000 | 180,840,000 | 55,989,000 | |||||||||
| Room | 55,531,000 | 56,111,000 | 49,323,000 | 11,806,000 | |||||||||
| Other | 111,075,000 | 108,907,000 | 99,458,000 | 27,209,000 | |||||||||
| Selling, general and administrative | 452,926,000 | 394,991,000 | 369,217,000 | 94,983,000 | |||||||||
| Maintenance and utilities | 155,016,000 | 153,512,000 | 140,722,000 | 49,913,000 | 141,000 | ||||||||
| Depreciation and amortization | 214,332,000 | 195,343,000 | 199,275,000 | 52,886,000 | 2,221,000 | ||||||||
| Other operating items, net | 6,650,000 | 8,007,000 | 4,713,000 | (8,000) | (61,000) | ||||||||
| Total operating costs and expenses | 3,342,301,000 | 2,103,134,000 | 1,959,686,000 | 496,740,000 | 2,301,000 | ||||||||
| Operating income (loss) | (1,038,044,000) | 48,348,000 | 58,239,000 | 76,582,000 | 54,846,000 | 68,164,000 | 61,990,000 | 48,104,000 | (854,875,000) | 233,104,000 | 189,359,000 | 83,400,000 | |
| Interest expense, net of amounts capitalized | 290,004,000 | 250,731,000 | 180,558,000 | 45,139,000 | 3,458,000 | ||||||||
| Total other expense, net | 288,972,000 | 239,382,000 | 168,873,000 | 45,139,000 | 3,458,000 | ||||||||
| Income before provision for state income taxes | 38,261,000 | ||||||||||||
| Provision for state income taxes | (4,067,000) | ||||||||||||
| Net income (loss) attributable to Boyd Gaming Corporation | $ (899,898,000) | $ (15,796,000) | $ 977,000 | $ 5,852,000 | $ (491,000) | $ 3,109,000 | $ (2,951,000) | $ (3,521,000) | $ (908,865,000) | $ (3,854,000) | $ 10,310,000 | $ 34,194,000 | |