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Compensation Plans - Narrative (Detail) - USD ($)
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred compensation equity $ (23,250,408)   $ (15,268,705)
Fully vested employee elected deferral period 5 years    
Deferred compensation liability $ 29,278,306   $ 37,348,294
Proceeds received under employee stock purchase plan $ 424,435 $ 413,635  
Employer 401(k) match, contributions equal to 250.00%    
401(k) plan, percent of employee's compensation matched 6.00%    
2014 Equity and Cash Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common shares available for issuance (in shares) 293,058    
Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Purchased During Period, Shares, Employee Stock Purchase Plans 2,692 3,083  
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent 85.00%    
Proceeds received under employee stock purchase plan $ 400,000 $ 400,000  
Share-based payment expense $ 100,000 $ 100,000