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LOANS AND ALLOWANCE FOR LOAN LOSSES (COVID-19 Loan Modifications) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($) loan	Dec. 31, 2020 loan
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	0	0
COVID 19 - Impact
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	30
Loan Restructuring, Trial Modifications, Amount	$ 65.3
Percentage of Loans and Leases Receivable, Modified	2.10%
COVID 19 - Impact | Principal Payment Deferrals
Financing Receivable, Impaired [Line Items]
Loan Restructuring, Trial Modifications, Amount	$ 37.4
Percentage of Loans and Leases Receivable, Modified	1.20%
COVID 19 - Impact | Full Payment Deferrals
Financing Receivable, Impaired [Line Items]
Loan Restructuring, Trial Modifications, Amount	$ 27.9
Percentage of Loans and Leases Receivable, Modified	0.90%

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- Definition

Percentage of loans and leases receivable modified.

+ References

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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