v3.25.4
Subordinated Debt - Additional Information (Detail) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jul. 17, 2025
Jun. 30, 2025
Feb. 10, 2025
Feb. 10, 2024
Sep. 26, 2023
Sep. 15, 2023
Jul. 12, 2023
Feb. 10, 2023
Jun. 29, 2020
Dec. 31, 2025
Dec. 31, 2024
Jul. 23, 2020
Subordinated Borrowing [Line Items]                        
Maturity date of trust preferred securities     Feb. 10, 2026 Feb. 10, 2025       Feb. 10, 2024        
Subordinated debentures                   $ 98,145 $ 97,477  
Subordinated Notes [Member]                        
Subordinated Borrowing [Line Items]                        
Quarterly distributions, trust preferred securities                 From June 29, 2020, through June 29, 2025, the Company will pay interest on the notes semi-annually in arrears on June 30 and December 30 of each year, commencing on December 30, 2020, at a fixed interest rate of 7.00%. Beginning June 30, 2025, the notes convert to a floating interest rate, to be reset quarterly, equal to the then-current Three-Month Term SOFR, as defined in the Indenture, plus 688 basis points. Interest payments during the floating-rate period will be paid quarterly in arrears on March 30, June 30, September 30 and December 30 of each year, commencing on September 30, 2025      
Maturity date of trust preferred securities                 Jun. 30, 2030      
Subordinated debentures                   $ 73,837 73,531  
Subordinated notes aggregate principal amount                 $ 42,000   75,000 $ 33,000
Realized loss from debt issuance   $ 1,361                    
Subordinated notes commencement date                 Dec. 30, 2020      
Subordinated notes fixed interest rate percentage                 7.00%      
Debt instrument, frequency of periodic payment                   semi-annually    
Subordinated Notes [Member] | SOFR plus [Member]                        
Subordinated Borrowing [Line Items]                        
Subordinated notes commencement date                 Sep. 30, 2025      
Debt instrument, frequency of periodic payment                 quarterly      
Subordinated notes variable interest rate percentage                 SOFR, as defined in the Indenture, plus 688 basis points      
7.125% Fixed-to-Floating Rate Subordinated Notes Due 2035 [Member]                        
Subordinated Borrowing [Line Items]                        
Quarterly distributions, trust preferred securities                   From July 17, 2025, through August 1, 2030, the Company will pay interest on the notes semi-annually in arrears on February 1 and August 1 of each year, commencing on February 1, 2026, at a fixed interest rate of 7.125%. Beginning August 1, 2030 the notes convert to a floating interest rate, to be reset quarterly, equal to the then-current Three-Month Term SOFR, as defined in the Indenture, plus 349 basis points for each quarterly interest period during the floating rate period. Interest payments during the floating-rate period will be paid quarterly in arrears on February 1, May 1, August 1 and November 1 of each year, commencing on November 1, 2030.    
Maturity date of trust preferred securities Aug. 01, 2035                      
Subordinated notes aggregate principal amount $ 75,000                 $ 75,000    
Subordinated notes commencement date Feb. 01, 2026                      
Subordinated notes fixed interest rate percentage 7.125%                      
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] SOFR plus [Member]                      
Debt instrument, frequency of periodic payment                   semi-annually    
Subordinated notes variable interest rate percentage SOFR, as defined in the Indenture, plus 349 basis                      
First Community Bancshares [Member]                        
Subordinated Borrowing [Line Items]                        
Estimated fair value of debentures                   $ 8,270    
Community First Bancshares, Inc. [Member]                        
Subordinated Borrowing [Line Items]                        
Estimated fair value of debentures                   4,187    
American State Bank Trust Company [Member]                        
Subordinated Borrowing [Line Items]                        
Estimated fair value of debentures                   7,732    
Trust Preferred Securities [Member] | FCB Capital Trust II [Member]                        
Subordinated Borrowing [Line Items]                        
Variable rate trust preferred securities                   $ 10,000 10,000  
Quarterly distributions, trust preferred securities             three-month CME term SOFR plus a tenor spread adjustment of 0.26% plus 2.00%     three-month LIBOR plus 2.00%    
LIBOR plus rate, percentage                   2.00%    
Preferred securities liquidation spread percent             2.00%          
Maturity date of trust preferred securities                   Apr. 15, 2035    
Proceeds from the sale of the trust preferred securities and the issuance of common securities                   $ 310    
Subordinated debentures                   10,310    
Trust Preferred Securities [Member] | FCB Capital Trust II [Member] | Tenor Spread Adjustment [Member]                        
Subordinated Borrowing [Line Items]                        
Preferred securities liquidation spread percent             0.26%          
Trust Preferred Securities [Member] | FCB Capital Trust III [Member]                        
Subordinated Borrowing [Line Items]                        
Variable rate trust preferred securities                   $ 5,000 5,000  
Quarterly distributions, trust preferred securities           three-month CME term SOFR plus a tenor spread adjustment of 0.26% plus 1.89%       three-month LIBOR plus 1.89%    
LIBOR plus rate, percentage                   1.89%    
Preferred securities liquidation spread percent           1.89%            
Maturity date of trust preferred securities                   Jun. 15, 2037    
Proceeds from the sale of the trust preferred securities and the issuance of common securities                   $ 155    
Subordinated debentures                   5,155    
Trust Preferred Securities [Member] | FCB Capital Trust III [Member] | Tenor Spread Adjustment [Member]                        
Subordinated Borrowing [Line Items]                        
Preferred securities liquidation spread percent           0.26%            
Trust Preferred Securities [Member] | Community First Statutory Trust I [Member]                        
Subordinated Borrowing [Line Items]                        
Preferred securities liquidation spread percent         3.25%              
Trust Preferred Securities [Member] | Community First Statutory Trust I [Member] | Tenor Spread Adjustment [Member]                        
Subordinated Borrowing [Line Items]                        
Preferred securities liquidation spread percent         0.26%              
Trust Preferred Securities [Member] | Community First Statutory Trust I [Member] | Community First Bancshares, Inc. [Member]                        
Subordinated Borrowing [Line Items]                        
Variable rate trust preferred securities                   $ 5,155 5,155  
Quarterly distributions, trust preferred securities         three-month CME term SOFR plus a tenor spread adjustment of 0.26% plus 3.25%         three-month LIBOR plus 3.25%    
LIBOR plus rate, percentage                   3.25%    
Maturity date of trust preferred securities                   Dec. 26, 2032    
Proceeds from the sale of the trust preferred securities and the issuance of common securities                   $ 5,000    
Subordinated debentures                   5,155    
Trust Preferred Securities [Member] | American State Bank Statutory Trust I [Member]                        
Subordinated Borrowing [Line Items]                        
Variable rate trust preferred securities                   $ 7,500 $ 7,500  
Preferred securities liquidation spread percent           1.80%            
Maturity date of trust preferred securities                   Sep. 15, 2035    
Proceeds from the sale of the trust preferred securities and the issuance of common securities                   $ 232    
Subordinated debentures                   $ 7,732    
Trust Preferred Securities [Member] | American State Bank Statutory Trust I [Member] | Tenor Spread Adjustment [Member]                        
Subordinated Borrowing [Line Items]                        
Preferred securities liquidation spread percent           0.26%            
Trust Preferred Securities [Member] | American State Bank Statutory Trust I [Member] | American State Bank Trust Company [Member]                        
Subordinated Borrowing [Line Items]                        
Quarterly distributions, trust preferred securities           three-month CME term SOFR plus a tenor spread adjustment of .26% plus 1.80%       hree-month LIBOR plus 1.80%    
LIBOR plus rate, percentage                   1.80%    
Maturity date of trust preferred securities                   Sep. 15, 2035