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Compensation Plans - Textual (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
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, Vested in Period, Fair Value     $ 3,300,000 $ 5,800,000 $ 13,300,000
Deferred compensation equity   $ 22,008,054 20,331,890 22,008,054  
Deferred compensation liability, current and noncurrent   $ 22,387,874 $ 30,342,204 $ 22,387,874  
Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Deferred compensation arrangement, fully vested employee elected deferral period     5 years    
401K          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Defined contribution plan, employer matching contribution, percent of match 200.00% 250.00%      
Employee's compensation contributed to the plan 6.00% 6.00%      
Number of years of employment required to vest in contribution     6 years    
2011 Equity and Cash Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Authorizes the issuance of Common Shares in various forms of equity awards (in shares)     600,000    
Common Shares available for awards (in shares)     233,582    
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants issued (in dollars per share)     $ 146.59 $ 195.00 $ 204.46