Annual report pursuant to Section 13 and 15(d)

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

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SECURITIES AND OTHER INVESTMENTS (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
HTM Securities, Amortized Cost $ 837,378 $ 847,732
Moody's AAA/AA/A    
HTM Securities, Amortized Cost 698,219 707,505
Moody's BBB/BB/B    
HTM Securities, Amortized Cost 1,166 1,187
Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 68,039 72,412
Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost 69,954 66,628
U.S. government and agency securities    
HTM Securities, Amortized Cost 0 687
U.S. government and agency securities | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 0 0
U.S. government and agency securities | Moody's BBB/BB/B    
HTM Securities, Amortized Cost 0 0
U.S. government and agency securities | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 0 687
U.S. government and agency securities | Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost 0 0
Obligations of states and political subdivisions    
HTM Securities, Amortized Cost 699,189 705,990
Obligations of states and political subdivisions | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 688,499 704,803
Obligations of states and political subdivisions | Moody's BBB/BB/B    
HTM Securities, Amortized Cost 1,166 1,187
Obligations of states and political subdivisions | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 0 0
Obligations of states and political subdivisions | Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost 9,524 0
Corporate and other bonds    
HTM Securities, Amortized Cost 4,349 5,159
Corporate and other bonds | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 0 0
Corporate and other bonds | Moody's BBB/BB/B    
HTM Securities, Amortized Cost 0 0
Corporate and other bonds | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 0 0
Corporate and other bonds | Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost 4,349 5,159
Mortgage-backed securities    
HTM Securities, Amortized Cost 133,840 135,896
Mortgage-backed securities | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 9,720 2,702
Mortgage-backed securities | Moody's BBB/BB/B    
HTM Securities, Amortized Cost 0 0
Mortgage-backed securities | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 68,039 71,725
Mortgage-backed securities | Moody's Not Rated - Non-Agency    
HTM Securities, Amortized Cost $ 56,081 $ 61,469