XML 117 R103.htm IDEA: XBRL DOCUMENT v3.21.1
Employee Benefit Plans - Compensation Expense Related To Stock Options (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 744,091 $ 606,626 $ 478,733
Income tax benefit 215,042 175,315 134,572
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense 667,241 664,484 574,236
Income tax benefit $ 192,833 $ 192,036 $ 161,418