Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS (Short-Term Borrowings) (Details)

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BORROWINGS (Short-Term Borrowings) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
Securities sold under agreements to repurchase $ 67,260 $ 39,197
Federal Funds Purchased 0 0
FHLB 344,600 1,043,600
Other short-term borrowings 0 5,000
Total short-term borrowings 411,860 1,087,797
Maximum month-end outstanding balance 509,949 1,087,797
Average outstanding balance during the period $ 804,644 $ 968,014
Average interest rate (during the period) 2.38% 1.91%
Average interest rate at end of period 1.97% 2.43%