Quarterly report pursuant to Section 13 or 15(d)

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

v3.24.3
SECURITIES AND OTHER INVESTMENTS (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
HTM Securities, Amortized Cost $ 807,080 $ 837,378
Moody's AAA/AA/A    
HTM Securities, Amortized Cost 691,244 698,219
Moody's BBB/BB/B    
HTM Securities, Amortized Cost 1,150 1,166
Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 67,416 68,039
Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost 47,270 69,954
US States and Political Subdivisions Debt Securities [Member]    
HTM Securities, Amortized Cost 695,460 699,189
US States and Political Subdivisions Debt Securities [Member] | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 684,805 688,499
US States and Political Subdivisions Debt Securities [Member] | Moody's BBB/BB/B    
HTM Securities, Amortized Cost 1,150 1,166
US States and Political Subdivisions Debt Securities [Member] | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 0 0
US States and Political Subdivisions Debt Securities [Member] | Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost 9,505 9,524
Corporate Bond Securities [Member]    
HTM Securities, Amortized Cost 3,484 4,349
Corporate Bond Securities [Member] | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 0 0
Corporate Bond Securities [Member] | Moody's BBB/BB/B    
HTM Securities, Amortized Cost 0 0
Corporate Bond Securities [Member] | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 0 0
Corporate Bond Securities [Member] | Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost 3,484 4,349
Collateralized Mortgage-Backed Securities [Member]    
HTM Securities, Amortized Cost 108,136 133,840
Collateralized Mortgage-Backed Securities [Member] | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 6,439 9,720
Collateralized Mortgage-Backed Securities [Member] | Moody's BBB/BB/B    
HTM Securities, Amortized Cost 0 0
Collateralized Mortgage-Backed Securities [Member] | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 67,416 68,039
Collateralized Mortgage-Backed Securities [Member] | Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost $ 34,281 $ 56,081