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INVESTMENT SECURITIES - Qualified Affordable Housing Projects (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) investment	Dec. 31, 2020 USD ($)
Summary of Investment Holdings [Line Items]
Gain (loss) on funds	$ 0
Affordable Housing Investment Fund
Summary of Investment Holdings [Line Items]
Investment amount	$ 3,200,000	$ 2,800,000
Number of investments | investment	4
Gain (loss) on funds	$ 2,300,000	$ 1,200,000

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Number Of Investments

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 740
-Section 50
-Paragraph 2
-Subparagraph (d)
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