INCOME TAXES - Section 42 Affordable Housing (Details)	12 Months Ended
Dec. 31, 2020 USD ($) investment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 investment
Schedule of Equity Method Investments [Line Items]
Gain (loss) on funds	$ 0
Affordable Housing Investment Fund
Schedule of Equity Method Investments [Line Items]
Number of investments \| investment	3		3
Investment amount	$ 2,800,000	$ 3,000,000.0

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Amount of investment in qualified affordable housing projects.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 740
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985

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- Definition

Amount of investment income (loss) of qualified affordable housing project investments accounted for using the equity method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 740
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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