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Deconsolidation of Certain Interests (Supplemental Pro Forma Information due to Consolidation of Borgata) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gaming |  |  |  |  |  |  |  |  | $ 1,847,167 | $ 1,799,724 | $ 1,863,249
Food and beverage |  |  |  |  |  |  |  |  | 307,442 | 303,404 | 306,075
Room |  |  |  |  |  |  |  |  | 163,509 | 157,427 | 150,258
Other |  |  |  |  |  |  |  |  | 123,959 | 122,237 | 122,813
Gross revenues |  |  |  |  |  |  |  |  | 2,442,077 | 2,382,792 | 2,442,395
Less promotional allowances |  |  |  |  |  |  |  |  | 242,645 | 240,537 | 243,657
Net Revenues | $ 542,674 | $ 546,313 | $ 559,867 | $ 550,578 | $ 531,593 | $ 528,897 | $ 540,680 | $ 541,085 | 2,199,432 | 2,142,255 | 2,198,738
Gaming |  |  |  |  |  |  |  |  | 900,922 | 888,414 | 921,486
Food and beverage |  |  |  |  |  |  |  |  | 168,096 | 168,730 | 169,033
Room |  |  |  |  |  |  |  |  | 41,298 | 41,132 | 41,404
Other |  |  |  |  |  |  |  |  | 80,508 | 86,166 | 86,958
Selling, general and administrative |  |  |  |  |  |  |  |  | 322,420 | 327,599 | 341,446
Maintenance and utilities |  |  |  |  |  |  |  |  | 104,548 | 109,526 | 106,695
Depreciation and amortization |  |  |  |  |  |  |  |  | 207,118 | 208,915 | 218,667
Corporate expense |  |  |  |  |  |  |  |  | 76,941 | 75,626 | 63,249
Project development, preopening and writedowns |  |  |  |  |  |  |  |  | 6,907 | 13,747 | 10,371
Total operating costs and expenses |  |  |  |  |  |  |  |  | 1,928,230 | 1,968,523 | 1,967,521
Operating Income (Loss) | 46,802 | 69,423 | 83,094 | 71,883 | 11,621 | 41,802 | 58,749 | 61,560 | 271,202 | 173,732 | 231,217
Interest income |  |  |  |  |  |  |  |  | (1,858) | (1,879) | (2,147)
Interest expense, net of amounts capitalized |  |  |  |  |  |  |  |  | 224,590 | 230,060 | 262,995
Loss on early extinguishments of debt |  |  |  |  |  |  |  |  | 40,733 | 1,536 | 28,346
Total other expense, net |  |  |  |  |  |  |  |  | 267,141 | 229,765 | 287,104
Income (loss) from continuing operations before income taxes |  |  |  |  |  |  |  |  | 4,061 | (56,033) | (55,887)
Income taxes benefit (provision) |  |  |  |  |  |  |  |  | 6,634 | 5,408 | (7,684)
Net income (loss) |  |  |  |  |  |  |  |  | 47,234 | (53,041) | (80,708)
Less: net income (loss) attributable to noncontrolling interest |  |  |  |  |  |  |  |  | 0 | 0 | (444)
Net Income (Loss) Attributable to Parent | $ (6,869) | $ 25,425 | $ (6,425) | $ 35,103 | $ (32,423) | $ (15,105) | $ 669 | $ (6,182) | $ 47,234 | $ (53,041) | $ (80,264)

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