Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
SECURITIES (Amortized Cost of AFS Securities by Security Type and Credit Rating) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]    
AFS Securities, Amortized Cost $ 1,929,987 $ 1,893,427
U.S. government and agency securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]    
AFS Securities, Amortized Cost 14,198 21,149
Obligations of states and political subdivisions    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]    
AFS Securities, Amortized Cost 504,866 421,344
Corporate and other bonds    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]    
AFS Securities, Amortized Cost 132,489 134,342
Other securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]    
AFS Securities, Amortized Cost $ 3,099 $ 3,079