Annual report pursuant to Section 13 and 15(d)

BORROWINGS (Short-Term Borrowings) (Details)

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BORROWINGS (Short-Term Borrowings) (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
Securities sold under agreements to repurchase $ 66,053,000 $ 39,197,000
FHLB Advances 370,200,000 1,043,600,000
Other short-term borrowings 0 5,000,000
Total short-term borrowings 436,253,000 1,087,797,000
Average outstanding balance during the period $ 673,116,000 $ 968,014,000
Average interest rate 2.30% 1.91%
Average interest rate at end of period 1.52% 2.43%