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Compensation Plans - Narrative (Detail) - USD ($)
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred compensation equity $ (18,214,588)   $ (17,011,144)
Fully vested employee elected deferral period 5 years    
Deferred compensation liability $ 32,355,274   $ 30,744,990
Proceeds received under employee stock purchase plan $ 375,306 $ 492,317  
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]      
Shares authorized for issuance (in shares) 300,000    
Common shares available for issuance (in shares) 236,595    
Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Purchased During Period, Shares, Employee Stock Purchase Plans 2,659 3,176  
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 $ 500,000  
Share-based payment expense $ 100,000 $ 100,000