v3.26.1
FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS - Federal Home Loan Bank Advances (Details) - USD ($)
1 Months Ended 6 Months Ended 12 Months Ended
Sep. 01, 2025
Jul. 07, 2025
Apr. 30, 2027
Oct. 31, 2025
Feb. 28, 2023
Mar. 31, 2022
Aug. 31, 2020
Jun. 30, 2026
Dec. 31, 2025
Aug. 30, 2020
Jun. 30, 2019
Summary of Federal Home Loan Bank advances                      
Federal Home Loan Bank advances               $ 0 $ 0    
Total other borrowings               51,885,000 51,804,000    
Totals               51,885,000 51,804,000    
Banks available and unused portion of borrowing agreement               427,527,000 433,654,000    
Maximum month-end amounts outstanding               0 5,000,000    
Advances from FHLB                      
Summary of Federal Home Loan Bank advances                      
Federal home loan bank advances               0 0    
Federal Home Loan Bank advances               0 0    
FHLB advances               $ 1,054,168,000 $ 1,017,631,000    
Weighted-average interest rate (as a percent)               0.00% 0.00%    
Advances from FHLB | Minimum                      
Summary of Federal Home Loan Bank advances                      
Federal home loan bank advances, interest rate               0.00% 0.00%    
Advances from FHLB | Maximum                      
Summary of Federal Home Loan Bank advances                      
Federal home loan bank advances, interest rate               0.00% 0.00%    
Senior Notes                      
Summary of Federal Home Loan Bank advances                      
Long-term debt, gross               $ 17,000,000 $ 17,000,000    
Unamortized debt issuance costs               (115,000) (196,000)    
Senior Notes | Senior Notes due 2039                      
Summary of Federal Home Loan Bank advances                      
Long-term debt, gross               $ 12,000,000 $ 12,000,000    
Debt instrument, face amount                     $ 12,000,000
Senior Notes | Senior Notes due 2039 | Prime Rate                      
Summary of Federal Home Loan Bank advances                      
Basis spread on variable rate (as a percent)         0.75%            
Senior Notes | Senior Notes due 2039 | Minimum                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)               6.00% 6.00%    
Debt instrument, interest rate, floor         3.00%            
Senior Notes | Senior Notes due 2039 | Maximum                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)               6.00% 6.75%    
Senior Notes | Senior Notes due 2040                      
Summary of Federal Home Loan Bank advances                      
Long-term debt, gross               $ 5,000,000 $ 5,000,000    
Senior Notes | Senior Notes due 2040 | Minimum                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)               6.00% 6.00%    
Senior Notes | Senior Notes due 2040 | Maximum                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)               6.00% 6.25%    
Senior Notes | Senior Notes, Variable Rate Due In October 2040                      
Summary of Federal Home Loan Bank advances                      
Debt instrument, face amount       $ 5,000,000              
Senior Notes | Senior Notes, Variable Rate Due In October 2040 | Prime Rate                      
Summary of Federal Home Loan Bank advances                      
Basis spread on variable rate (as a percent)       0.75%              
Senior Notes | Senior Notes, Variable Rate Due In October 2040 | Minimum                      
Summary of Federal Home Loan Bank advances                      
Debt instrument, interest rate, floor       4.00%              
Subordinated Notes                      
Summary of Federal Home Loan Bank advances                      
Long-term debt, gross               $ 35,000,000 $ 35,000,000    
Subordinated Notes | Subordinated Notes due 2030                      
Summary of Federal Home Loan Bank advances                      
Long-term debt, gross               $ 0 $ 0    
Subordinated Notes | Subordinated Notes due 2030 | Minimum                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)               0.00% 0.00%    
Subordinated Notes | Subordinated Notes due 2030 | Maximum                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)               0.00% 0.00%    
Subordinated Notes | Subordinated Notes due 2032                      
Summary of Federal Home Loan Bank advances                      
Long-term debt, gross               $ 35,000,000 $ 35,000,000    
Subordinated Notes | Subordinated Notes due 2032 | Minimum                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)               4.75% 4.75%    
Subordinated Notes | Subordinated Notes due 2032 | Maximum                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)               4.75% 4.75%    
Subordinated Notes | Subordinated Notes due 2030                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)   6.00%               6.00%  
Debt instrument, term (in years)             5 years        
Stock redeemed or called during period, value   $ 15,000                  
Subordinated Notes | Subordinated Notes due 2030 | SOFR                      
Summary of Federal Home Loan Bank advances                      
Basis spread on variable rate (as a percent) 5.91%                    
Subordinated Notes | Subordinated Notes due 2032                      
Summary of Federal Home Loan Bank advances                      
Stated interest rate (as a percent)           4.75%          
Debt instrument, term (in years)           5 years          
Subordinated Notes | Subordinated Notes due 2032 | SOFR | Forecast                      
Summary of Federal Home Loan Bank advances                      
Basis spread on variable rate (as a percent)     3.29%