XML 70 R47.htm IDEA: XBRL DOCUMENT v3.24.0.1
Compensation Plans - Textual (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
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 $ 13,800,000 $ 9,100,000 $ 5,200,000
Deferred compensation equity 15,392,418 17,011,144  
Proceeds received under employee stock purchase plan $ 409,790 526,285 $ 603,268
Deferred compensation arrangement, fully vested employee elected deferral period 5 years    
Deferred compensation liability, current and noncurrent $ 36,087,170 $ 30,744,990  
2022 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) 300,000    
2011 Equity and Cash Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common Shares available for awards (in shares) 234,952    
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grants issued (in dollars per share) $ 186.85 $ 176.46 $ 158.92
Employee Stock Purchase 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) 89,426    
ESPP shares purchased during year (in shares) 2,904 3,392  
Proceeds received under employee stock purchase plan $ 400,000 $ 500,000  
Share based payment expense $ 100,000 $ 100,000