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Financial Instruments and Fair Value Measurements (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 19, 2016
USD ($)
Jan. 29, 2016
USD ($)
payment
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
payment
Dec. 31, 2015
USD ($)
Apr. 22, 2016
USD ($)
Jul. 31, 2015
USD ($)
Land [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Tangible Asset Impairment Charges       $ 0 $ 0    
Jamul Land [Member] | Scenario, Forecast [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Gain on sale of land held for sale     $ 4,200,000        
Jamul Land [Member] | Subsequent Event [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Proceeds from sale of land held for sale $ 5,500,000            
Initial Montana Acquisition [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Business Combination, Contingent Consideration Maximum   $ 2,000,000          
Business Combination, Contingent Consideration, Liability       $ 2,000,000      
Business Combination, Contingent Consideration Arrangements, Number of Periodic Payment | payment   4   4      
Initial Montana Acquisition [Member] | Fair Value, Inputs, Level 3 [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Fair Value of Identified Intangible Assets   $ 14,200,000          
Initial Montana Acquisition [Member] | Property and Equipment [Member] | Fair Value, Inputs, Level 3 [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Estimated Fair Value of Property and Equipment   $ 2,400,000          
Sartini Gaming [Member] | Fair Value, Inputs, Level 3 [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Fair Value of Identified Intangible Assets             $ 80,500,000
Sartini Gaming [Member] | Land and Land Improvements [Member] | Fair Value, Inputs, Level 3 [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Estimated Fair Value of Property and Equipment             37,800,000
Sartini Gaming [Member] | Other Assets Acquired [Member] | Fair Value, Inputs, Level 3 [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Estimated Fair Value of Property and Equipment             $ 45,400,000
Second Montana Acquisition [Member] | Fair Value, Inputs, Level 3 [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Fair Value of Identified Intangible Assets           $ 11,100,000  
Second Montana Acquisition [Member] | Property and Equipment [Member] | Fair Value, Inputs, Level 3 [Member]              
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]              
Estimated Fair Value of Property and Equipment           $ 7,800,000