Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
SECURITIES (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details)
$ in Thousands
Mar. 31, 2020
USD ($)
HTM Securities, Amortized Cost $ 552,176
Moody's AAA/AA/A | Standard & Poor's AAA/AA/A  
HTM Securities, Amortized Cost 536,747
Moody's Not Rated - Agency [Member] | Standard Poors Not Rated - Agency [Member]  
HTM Securities, Amortized Cost 8,659
Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]  
HTM Securities, Amortized Cost 6,770
U.S. government and agency securities  
HTM Securities, Amortized Cost 2,797
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 2,797
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 543,517
Obligations of states and political subdivisions | Moody's AAA/AA/A | Standard & Poor's AAA/AA/A  
HTM Securities, Amortized Cost 536,747
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 6,770
Total mortgage-back securities  
HTM Securities, Amortized Cost 5,862
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 5,862
Total mortgage-back securities | Moody's Not Rated - Non-Agency [Member] | Standard Poors Not Rated - Non-Agency [Member]  
HTM Securities, Amortized Cost $ 0