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Fair Value Measurements (Fair Value Balance Sheet Long-Term Debt Grouping) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Parent
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	$ 2,322,535	$ 2,389,165
Long-term debt, net	2,311,425	2,368,988
Parent | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	2,322,535	2,389,165
Parent | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	2,311,425	2,368,988
Parent | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	2,346,084	2,416,873
Subsidiary, Peninsula Gaming [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	1,018,950	1,092,403
Long-term debt, net	1,018,950	1,092,403
Subsidiary, Peninsula Gaming [Member] | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	1,018,950	1,092,403
Subsidiary, Peninsula Gaming [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	1,018,950	1,092,403
Subsidiary, Peninsula Gaming [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	1,030,433	1,117,492
Consolidated, Excluding Borgata [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	3,341,485	3,481,568
Long-term debt, net	3,330,375	3,461,391
Consolidated, Excluding Borgata [Member] | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	3,341,485	3,481,568
Consolidated, Excluding Borgata [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	3,330,375	3,461,391
Consolidated, Excluding Borgata [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	3,376,517	3,534,365
Holdco Note [Member] | Parent | Other
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	157,810	143,000
Level 1 | 9.125% Senior Notes Due 2018 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross		500,000
Level 1 | 9.125% Senior Notes Due 2018 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net		495,155
Level 1 | 9.125% Senior Notes Due 2018 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure		517,500
Level 1 | 9.00% Senior Notes Due 2020 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	350,000	350,000
Level 1 | 9.00% Senior Notes Due 2020 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	350,000	350,000
Level 1 | 9.00% Senior Notes Due 2020 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	374,500	359,625
Level 1 | 6.875 % Senior Notes Due 2023 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	750,000
Level 1 | 6.875 % Senior Notes Due 2023 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	750,000
Level 1 | 6.875 % Senior Notes Due 2023 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	759,375
Level 2 | Bank Credit Facility [Member] | Fair Value, Measurements, Nonrecurring [Member] | Parent | Bank Credit Facility | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	1,064,725	1,387,425
Level 2 | Bank Credit Facility [Member] | Fair Value, Measurements, Nonrecurring [Member] | Parent | Bank Credit Facility | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	1,061,872	1,383,836
Level 2 | Bank Credit Facility [Member] | Fair Value, Measurements, Nonrecurring [Member] | Parent | Bank Credit Facility | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	1,062,290	1,395,595
Level 2 | Bank Credit Facility [Member] | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Bank Credit Facility | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	668,950	742,400
Level 2 | Bank Credit Facility [Member] | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Bank Credit Facility | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	668,950	742,400
Level 2 | Bank Credit Facility [Member] | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Bank Credit Facility | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	667,308	754,364
Level 2 | Peninsula Senior Notes due 2018 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Senior Notes | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	350,000	350,000
Level 2 | Peninsula Senior Notes due 2018 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Senior Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	350,000	350,000
Level 2 | Peninsula Senior Notes due 2018 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Senior Notes | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	363,125	363,125
Level 3 | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Other | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross		3
Level 3 | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Other | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure		3
Level 3 | Holdco Note [Member] | Fair Value, Measurements, Nonrecurring [Member] | Parent | Other | Outstanding Face Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross		151,740
Level 3 | Holdco Note [Member] | Fair Value, Measurements, Nonrecurring [Member] | Parent | Other | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	149,553	139,997
Level 3 | Holdco Note [Member] | Fair Value, Measurements, Nonrecurring [Member] | Parent | Other | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 149,919	144,153
Level 3 | Other | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Senior Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross		$ 3

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- 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.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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