Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
SECURITIES (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details)
$ in Thousands
Sep. 30, 2020
USD ($)
HTM Securities, Amortized Cost $ 546,661
Moody's AAA/AA/A | Standard & Poor's AAA/AA/A  
HTM Securities, Amortized Cost 533,742
Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]  
HTM Securities, Amortized Cost 8,309
Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]  
HTM Securities, Amortized Cost 4,610
U.S. government and agency securities  
HTM Securities, Amortized Cost 2,767
U.S. government and agency securities | Moody's AAA/AA/A | Standard & Poor's AAA/AA/A  
HTM Securities, Amortized Cost 0
U.S. government and agency securities | Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]  
HTM Securities, Amortized Cost 2,767
U.S. government and agency securities | Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]  
HTM Securities, Amortized Cost 0
Obligations of states and political subdivisions  
HTM Securities, Amortized Cost 538,352
Obligations of states and political subdivisions | Moody's AAA/AA/A | Standard & Poor's AAA/AA/A  
HTM Securities, Amortized Cost 533,742
Obligations of states and political subdivisions | Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]  
HTM Securities, Amortized Cost 0
Obligations of states and political subdivisions | Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]  
HTM Securities, Amortized Cost 4,610
Total mortgage-back securities  
HTM Securities, Amortized Cost 5,542
Total mortgage-back securities | Moody's AAA/AA/A | Standard & Poor's AAA/AA/A  
HTM Securities, Amortized Cost 0
Total mortgage-back securities | Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]  
HTM Securities, Amortized Cost 5,542
Total mortgage-back securities | Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]  
HTM Securities, Amortized Cost $ 0