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Fair Value Measurements (Fair Value Balance Sheet Long-Term Debt Grouping) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | May. 21, 2015 | Dec. 31, 2014 | Aug. 16, 2012 | Nov. 10, 2010
--- | --- | --- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | $ 3,322,475 |  |  |  |
Fair Value, Measurements, Nonrecurring [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal |  |  | $ 3,481,568 |  |
Fair Value, Measurements, Nonrecurring [Member] | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt |  |  | 3,404,851 |  |
Fair Value, Measurements, Nonrecurring [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument |  |  | 3,534,365 |  |
Parent Company [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | 2,309,725 |  | 2,389,165 |  |
Long-term debt | 2,277,299 |  | 2,344,983 |  |
Parent Company [Member] | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt | 2,277,299 |  | 2,344,983 |  |
Parent Company [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument | 2,348,120 |  | 2,416,873 |  |
Parent Company [Member] | Bank Credit Facility | Bank Credit Facility |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal |  |  | 1,387,425 |  |
Long-term debt | 1,197,277 |  | 1,369,176 |  |
Parent Company [Member] | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | 1,209,725 |  |  |  |
Parent Company [Member] | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt | 1,197,277 |  | 1,369,176 |  |
Parent Company [Member] | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument | 1,202,870 |  | $ 1,395,595 |  |
Parent Company [Member] | 9.125% Senior Notes Due 2018 | Senior Notes |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument, stated interest rate |  |  | 9.13% |  | 9.125%
Outstanding principal |  |  | $ 500,000 |  |
Long-term debt |  |  | 487,765 |  |
Parent Company [Member] | 9.125% Senior Notes Due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt | 342,956 |  | 487,765 |  |
Parent Company [Member] | 9.125% Senior Notes Due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument | $ 372,750 |  | 517,500 |  |
Parent Company [Member] | Senior Notes Due 2023 [Member] | Senior Notes |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument, stated interest rate | 6.875% | 6.875% |  |  |
Long-term debt | $ 737,066 |  |  |  |
Parent Company [Member] | Senior Notes Due 2023 [Member] | Senior Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | 750,000 |  |  |  |
Parent Company [Member] | Senior Notes Due 2023 [Member] | Senior Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt | 737,066 |  |  |  |
Parent Company [Member] | Senior Notes Due 2023 [Member] | Senior Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument | 772,500 |  |  |  |
Parent Company [Member] | Holdco Note | Senior Subordinated Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt |  |  | 139,968 |  |
Parent Company [Member] | Holdco Note | Senior Subordinated Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument |  |  | 144,153 |  |
Parent Company [Member] | Holdco Note | Fixed Rate Debt | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | 143,000 |  |  |  |
Consolidated, Excluding Borgata |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | 3,322,475 |  | 3,481,568 |  |
Long-term debt | 3,269,549 |  | 3,404,851 |  |
Consolidated, Excluding Borgata | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt | 3,269,549 |  |  |  |
Consolidated, Excluding Borgata | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument | 3,366,251 |  |  |  |
Peninsula |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | 1,012,750 |  | 1,092,403 |  |
Long-term debt | 992,250 |  | 1,059,868 |  |
Peninsula | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt | 992,250 |  | 1,059,868 |  |
Peninsula | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument | 1,018,131 |  | 1,117,492 |  |
Peninsula | Other |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal |  |  | 3 |  |
Long-term debt |  |  | 3 |  |
Peninsula | Bank Credit Facility | Bank Credit Facility |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal |  |  | 742,400 |  |
Long-term debt | 648,607 |  | 718,807 |  |
Peninsula | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | 662,750 |  |  |  |
Peninsula | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt | 648,607 |  | 718,807 |  |
Peninsula | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument | $ 661,131 |  | 754,364 |  |
Peninsula | Other | Fixed Rate Debt | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument |  |  | $ 3 |  |
Peninsula | 8.375% Senior Notes due 2018 | Senior Notes |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument, stated interest rate | 8.375% |  | 8.38% | 8.375% |
Outstanding principal |  |  | $ 350,000 |  |
Long-term debt | $ 343,643 |  | 341,058 |  |
Peninsula | 8.375% Senior Notes due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Outstanding principal | 350,000 |  |  |  |
Peninsula | 8.375% Senior Notes due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Carrying Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Long-term debt | 343,643 |  | 341,058 |  |
Peninsula | 8.375% Senior Notes due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Debt instrument | $ 357,000 |  | $ 363,125 |  |

X
- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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