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Related Party Transactions (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Related Party Transaction [Line Items]          
Revenues $ 210,337,000 $ 107,660,000 $ 641,669,000 $ 323,428,000  
Mr. Sartini [Member]          
Related Party Transaction [Line Items]          
Reimbursement expense paid     200,000 100,000  
Mr. Sartini [Member] | Maximum [Member]          
Related Party Transaction [Line Items]          
Reimbursement expense paid 100,000 100,000      
Due to related parties         $ 100,000
Executive Vice President and Chief Legal Officer [Member]          
Related Party Transaction [Line Items]          
Due to related parties         0
Revenues $ 200,000 $ 300,000 $ 700,000 $ 900,000  
Type of Revenue [Extensible List] us-gaap:CasinoMember us-gaap:CasinoMember us-gaap:CasinoMember us-gaap:CasinoMember  
Gaming expenses $ 200,000 $ 300,000 $ 700,000 $ 800,000  
Type of Cost, Good or Service [Extensible List] us-gaap:CasinoMember us-gaap:CasinoMember us-gaap:CasinoMember us-gaap:CasinoMember  
Lyle A. Berman [Member]          
Related Party Transaction [Line Items]          
Due to related parties $ 0   $ 0   0
Consulting agreement expiry date Jul. 31, 2018        
Lyle A. Berman [Member] | Maximum [Member] | Selling General and Administrative Expenses [Member]          
Related Party Transaction [Line Items]          
Consulting agreement expenses, related party $ 100,000 $ 100,000 $ 200,000 $ 200,000  
Office Headquarters and Tavern Lease [Member] | Mr. Sartini [Member]          
Related Party Transaction [Line Items]          
Percentage of counterparty ownership by related party     33.00%    
Office Headquarters and Tavern Lease [Member] | Mr. Sartini's Immediate Family Members [Member]          
Related Party Transaction [Line Items]          
Percentage of counterparty ownership by related party     5.00%    
Office Headquarters and Tavern Lease [Member] | Stephen Arcana [Member]          
Related Party Transaction [Line Items]          
Percentage of counterparty ownership by related party     3.00%    
Office Headquarters [Member] | Mr. Sartini [Member]          
Related Party Transaction [Line Items]          
Related party transaction, amounts of transaction 300,000 300,000 $ 1,000,000 900,000  
Rent expense payable to related party 0   0   100,000
Tavern Leases [Member] | Mr. Sartini [Member]          
Related Party Transaction [Line Items]          
Related party transaction, amounts of transaction 100,000 200,000 400,000 700,000  
Rent expense payable to related party 0   0   0
Office Headquarters Lease [Member] | Mr. Sartini [Member]          
Related Party Transaction [Line Items]          
Rental income for sublet portion   $ 0      
Due from related parties 0   0   $ 0
Office Headquarters Lease [Member] | Mr. Sartini [Member] | Maximum [Member]          
Related Party Transaction [Line Items]          
Rental income for sublet portion $ 100,000   $ 100,000 $ 100,000