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Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Stock-based Compensation [Abstract]    
Stock based compensation expense $ 484 $ 213
Restricted Stock [Member]    
Stock-based Compensation [Abstract]    
Stock based compensation expense 484 213
Dividend paid on stock based compensation 23 $ 18
Unrecognized compensation expense related to restricted stock grants $ 2,200  
Unrecognized compensation expense, weighted average period 3 years 1 month 6 days  
Granted (in shares) 35,438 9,193
Stock Options [Member]    
Stock-based Compensation [Abstract]    
Stock based compensation expense $ 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]    
Accelerated vesting of restricted stock related to employee retirement $ 245  
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