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Commitments and Contingencies PGL Commitments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 20, 2011
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Sponsor Fees [Line Items]        
Accrued liabilities   $ (251,082) $ (249,518)  
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
Sponsor Fee Percentage   4.50%    
Diamond Jo Worth        
Sponsor Fees [Line Items]        
Sponsor Fees   $ 4,900 5,000 $ 4,800
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   (8,900) (9,600)  
Mulvane Special Tax Assessment for Utilities, Discount [Member] | Kansas Star        
Sponsor Fees [Line Items]        
Accrued liabilities   (4,000) (4,600)  
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   14,100 14,400  
Other Commitment, Discount on Obligation   $ 2,800 $ 2,900