Annual report [Section 13 and 15(d), not S-K Item 405]

SECURITIES AND OTHER INVESTMENTS (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details)

v3.25.4
SECURITIES AND OTHER INVESTMENTS (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost $ 884,216 $ 803,851
Moody's AAA/AA/A    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 784,155 692,671
Moody's BBB/BB/B    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 1,122 1,144
Moody's Not Rated - Agency    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 64,867 64,595
Moody's Not Rated - Non-Agency    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 34,072 45,441
US States and Political Subdivisions Debt Securities [Member]    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 793,162 697,683
US States and Political Subdivisions Debt Securities [Member] | Moody's AAA/AA/A    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 782,453 686,923
US States and Political Subdivisions Debt Securities [Member] | Moody's BBB/BB/B    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 1,122 1,144
US States and Political Subdivisions Debt Securities [Member] | Moody's Not Rated - Agency    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 0 0
US States and Political Subdivisions Debt Securities [Member] | Moody's Not Rated - Non-Agency    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 9,587 9,616
Corporate Bond Securities [Member]    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 2,255 3,322
Corporate Bond Securities [Member] | Moody's AAA/AA/A    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 0 0
Corporate Bond Securities [Member] | Moody's BBB/BB/B    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 0 0
Corporate Bond Securities [Member] | Moody's Not Rated - Agency    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 0 0
Corporate Bond Securities [Member] | Moody's Not Rated - Non-Agency    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 2,255 3,322
Collateralized Mortgage-Backed Securities [Member]    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 88,799 102,846
Collateralized Mortgage-Backed Securities [Member] | Moody's AAA/AA/A    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 1,702 5,748
Collateralized Mortgage-Backed Securities [Member] | Moody's BBB/BB/B    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 0 0
Collateralized Mortgage-Backed Securities [Member] | Moody's Not Rated - Agency    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost 64,867 64,595
Collateralized Mortgage-Backed Securities [Member] | Moody's Not Rated - Non-Agency    
Schedule of Held-to-Maturity Securities [Line Items]    
HTM Securities, Amortized Cost $ 22,230 $ 32,503