| COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | 
|---|---|---|
| Deposits with other financial institutions | $ 290.5 | $ 131.4 | 
| Uninsured deposits with other financial institutions | 36.4 | 11.6 | 
| Reserve for Off-balance Sheet Activities | ||
| Off-balance sheet credit risks, amount, liability | 10.8 | 2.6 | 
| Cash Flow Hedging | ||
| Deposits with other financial institutions serves as collateral for cash flow hedge | $ 251.0 | $ 116.8 | 
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- Definition Deposits with other financial institutions. No definition available. 
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- Definition Deposits with other financial institutions serves as collateral for cash flow hedge. No definition available. 
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- Definition The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available. 
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- Definition Amount of valuation and qualifying accounts and reserves. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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