v3.26.1
SECURITIES (Debt Securities, Held-to-Maturity, Credit Rating) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity $ 929,592 $ 961,487
Credit Rating, Not Credit Rated    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 498,367 522,743
U.S. Government and agency obligations    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 221 262
U.S. Government and agency obligations | Credit Rating, Not Credit Rated    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 221 262
Municipal bonds    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 422,397 430,571
Municipal bonds | Credit Rating, Not Credit Rated    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 7,512 8,296
Corporate bonds    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 2,488 2,544
Corporate bonds | Credit Rating, Not Credit Rated    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 1,988 2,044
Mortgage-backed or related securities    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 504,486 528,110
Mortgage-backed or related securities | Credit Rating, Not Credit Rated    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 488,646 512,141
Standard & Poor's, AAA to A Rating    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 431,225 438,744
Standard & Poor's, AAA to A Rating | U.S. Government and agency obligations    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 0 0
Standard & Poor's, AAA to A Rating | Municipal bonds    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 414,885 422,275
Standard & Poor's, AAA to A Rating | Corporate bonds    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity 500 500
Standard & Poor's, AAA to A Rating | Mortgage-backed or related securities    
Financing Receivable, Credit Quality Indicator [Line Items]    
Debt securities, held-to-maturity $ 15,840 $ 15,969