v3.26.1
Equity Incentive Plan - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Feb. 20, 2024
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expected future compensation expense $ 1,468   $ 1,468      
Weighted average remaining life of grants related to unvested awards not yet recognized     2 years 10 months 28 days      
Civista Board of Directors            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common shares issued 10,890 10,270        
Common shares issued, value $ 270 $ 200        
Restricted Stock [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted shares vesting service period     3 years      
Restricted Stock [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted shares vesting service period     5 years      
2014 Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Maximum number of shares under stock option plan authorized for issuance           375,000
Plan expiration date     Apr. 16, 2024      
Share based compensation expense 164 $ 197 $ 883 $ 352    
Expected future compensation expense $ 1,468   $ 1,468      
Weighted average remaining life of grants related to unvested awards not yet recognized     2 years 10 months 28 days      
2024 Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Maximum number of shares under stock option plan authorized for issuance         450,000  
Number of shares available for grant under stock option plan 329,487   329,487      
Options granted 0 0 0 0