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Commitments and Contingencies PGL Commitments (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Dec. 20, 2011 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Sponsor Fees [Line Items] |  |  |  |
Accrued liabilities |  | $ 249,518 | $ 239,266 |
Kansas Star |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Payment to option holder, term | 10 years |  |  |
Diamond Jo Dubuque |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Sponsor Fees |  | $ 3,000 | 2,800 | $ 3,000
Sponsor Fee Percentage |  | 4.50% |  |
Diamond Jo Worth |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Sponsor Fees |  | $ 5,000 | 4,800 | $ 5,000
Sponsor Fee Percentage |  | 5.76% |  |
Annual Donations for Education in Operating Area [Member] | Kansas Star |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Amount of other commitment |  | $ 1,500 |  |
Mulvane Special Tax Assessment for Utilities [Member] | Kansas Star |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Other Commitment, Time Period |  | 15 years |  |
Debt Issued by Counterparty |  | $ 19,700 |  |
Special Tax Assessment |  |  | 1,700 |
Accrued liabilities |  | 9,600 | 10,300 |
Mulvane Special Tax Assessment for Utilities, Discount [Member] | Kansas Star |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Accrued liabilities |  | 4,600 | 5,100 |
Additional Mulvane Special Tax Assessment for Utilities [Member] | Kansas Star |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Debt Issued by Counterparty |  | 5,000 |  |
Special Tax Assessment |  | 1,700 |  |
Dubuque Minimum Assessment Agreement [Member] | Diamond Jo Dubuque |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Property Taxes, Minimum Agreed Taxable Value |  | 57,900 |  |
Other Commitment, Minimum Annual Payments |  | 1,900 |  |
Accrued Liabilities [Member] | Dubuque Minimum Assessment Agreement [Member] | Diamond Jo Dubuque |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Other Commitment, Obligation |  | 1,900 |  |
Other Liabilities [Member] | Dubuque Minimum Assessment Agreement [Member] | Diamond Jo Dubuque |  |  |  |
Sponsor Fees [Line Items] |  |  |  |
Other Commitment, Obligation |  | 14,400 | 14,700 |
Other Commitment, Discount on Obligation |  | $ 2,900 | $ 3,000 |

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