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Stock-Based Compensation (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Stock-based Compensation [Abstract]          
Stock based compensation expense       $ 1,008 $ 636
Restricted Stock [Member]          
Stock-based Compensation [Abstract]          
Stock based compensation expense   $ 300 $ 200 1,000 600
Dividend paid on stock based compensation   27 $ 19 73 $ 55
Unrecognized compensation expense related to restricted stock grants   $ 2,000   $ 2,000  
Unrecognized compensation expense, weighted average period       2 years 10 months 24 days  
Granted (in shares)   0 0 40,438 9,193
Management Retention Restricted Stock [Member]          
Stock-based Compensation [Abstract]          
Granted (in shares) 5,000        
Award vesting period       5 years  
Stock Options [Member]          
Stock-based Compensation [Abstract]          
Stock based compensation expense   $ 0 $ 0 $ 0 $ 0
Unrecognized compensation expense related to unvested stock option awards   $ 0   $ 0  
Options granted to purchase shares of CTBI common stock (in shares)       0 0
2015 Plan [Member] | Restricted Stock [Member]          
Stock-based Compensation [Abstract]          
Award vesting period       4 years  
2015 Plan [Member] | Restricted Stock [Member] | Maximum [Member]          
Stock-based Compensation [Abstract]          
Period of certain participant employee termination events following change in control for restriction on restricted stock granted to lapse       24 months