Quarterly report pursuant to Section 13 or 15(d)

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

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SECURITIES (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
HTM Securities, Amortized Cost $ 756,872 $ 628,000
Moody's AAA/AA/A    
HTM Securities, Amortized Cost 684,294 620,873
Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 72,578 7,127
U.S. government and agency securities    
HTM Securities, Amortized Cost 2,483 2,604
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 Not Rated - Agency    
HTM Securities, Amortized Cost 2,483 2,604
Obligations of states and political subdivisions    
HTM Securities, Amortized Cost 684,294 620,873
Obligations of states and political subdivisions | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 684,294 620,873
Obligations of states and political subdivisions | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost 0 0
Mortgage-backed securities    
HTM Securities, Amortized Cost 70,095 4,523
Mortgage-backed securities | Moody's AAA/AA/A    
HTM Securities, Amortized Cost 0 0
Mortgage-backed securities | Moody's Not Rated - Agency    
HTM Securities, Amortized Cost $ 70,095 $ 4,523