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SUBORDINATED DEBT - Additional Information (Details) - Subordinated Debt [Member] - USD ($) | 1 Months Ended
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Dec. 31, 2020 | Dec. 31, 2017
Debt Instrument [Line Items] |  |
Principal amount | $ 100,000,000.0 | $ 35,000,000.0
Non-callable term | 5 years | 5 years
Notes maturity date | Dec. 22, 2030 | Dec. 15, 2027
Fixed interest rate | 3.50% | 4.75%
LIBOR spread | 3.26% | 2.54%
Debt issuance costs | $ 1,900,000 | $ 875,000

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