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Equity Compensation Class B Units (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Jan. 02, 2018
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common Stock, Dividends, Per Share, Declared   $ 0.175 $ 0.2625 $ 0.6125 $ 0.785  
Share-based Compensation   $ (152,000) $ 0 $ 5,463,000 $ 0  
market vesting condition capital increase threshhold       $ 5,660,580    
ClassBUnits [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
common stock fair value per share $ 20.19          
Common Stock, Dividends, Per Share, Declared         $ 0.25  
Share-based Compensation           $ 65,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum       20 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 256,087          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum       30 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 4,266,409          
Class B Units valuation assumption dividend yield 4.95%          
ClassBUnit valuation assumption expected volatility 25.70%          
Class B Unit valuation assumptions risk free rate 2.71%          
Performance based restricted stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
common stock fair value per share $ 7.23          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum       2 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 272,929          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum       3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 1,845,000          
Class B Units valuation assumption dividend yield 6.87%          
ClassBUnit valuation assumption expected volatility 44.40%          
Class B Unit valuation assumptions risk free rate 0.11%          
100percentvestinglevel [Member] | ClassBUnits [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 16.66          
100percentvestinglevel [Member] | Performance based restricted stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 6.76          
one year [Member] | ClassBUnits [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 171,988          
one year [Member] | Performance based restricted stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 136,462          
three year [Member] | ClassBUnits [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 84,099          
three year [Member] | Performance based restricted stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 136,467