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Fair Value Measurements (Fair Value Balance Sheet Long-Term Debt Grouping) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Parent
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 2,753,275	$ 2,309,725
Long-term Debt, Gross	2,753,275	2,309,725
Long-term debt, net	2,712,098	2,277,299
Parent | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	2,712,098	2,277,299
Parent | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	2,854,782	2,348,120
Subsidiary, Peninsula Gaming [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	960,525	1,012,750
Long-term Debt, Gross	960,525	1,012,750
Long-term debt, net	945,764	992,250
Subsidiary, Peninsula Gaming [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	945,764	992,250
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	963,489	1,018,131
Consolidated, Excluding Borgata [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	3,713,800	3,322,475
Long-term Debt, Gross	3,713,800	3,322,475
Long-term debt, net	3,657,862	3,269,549
Consolidated, Excluding Borgata [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, net	3,657,862	3,269,549
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	3,818,271	3,366,251
Level 1 | 9.00% Senior Notes Due 2020 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	350,000	350,000
Long-term debt, net	343,750	342,956
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		342,956
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	367,500	372,750
Level 1 | 6.875 % Senior Notes Due 2023 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	750,000	750,000
Long-term debt, net	737,913	737,066
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		737,066
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	798,750	772,500
Level 1 | 6.375% Senior Notes Due 2026 | Fair Value, Measurements, Nonrecurring [Member] | Parent | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	750,000
Long-term debt, net	737,446
Level 1 | 6.375% Senior Notes Due 2026 | 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	785,625
Level 2 | Bank Credit Facility [Member] | Fair Value, Measurements, Nonrecurring [Member] | Parent | Bank Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	903,275	1,209,725
Long-term debt, net	892,989	1,197,277
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		1,197,277
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	902,907	1,202,870
Level 2 | Bank Credit Facility [Member] | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Bank Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	610,525	662,750
Long-term debt, net	600,737	648,607
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	611,301	661,131
Level 2 | Peninsula Senior Notes due 2018 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Subsidiary, Peninsula Gaming [Member] | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	350,000	350,000
Long-term debt, net	345,027	343,643
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	$ 352,188	$ 357,000

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
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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