Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS (Narrative) (Details)

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BORROWINGS (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Feb. 26, 2021
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Subordinated Borrowing [Line Items]        
Remaining available balance for the federal funds lines   $ 997,000   $ 847,000
Maximum collateral dependent line of credit with the FHLB   6,000,000    
Long-term debt, early repayments $ 200,000 214,695 $ 230,306 550,000
Long-term debt, prepayment penalties $ 14,700     31,200
Remaining borrowing capacity   $ 25,000   $ 25,000