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INVESTMENT SECURITIES - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
INVESTMENT SECURITIES
Available-for-sale Securities, Gross Realized Gains	$ 0	$ 0	$ 0	$ 78,000
Securities classified as held to maturity	0		0		$ 0
Fair Value of Debt Securities Reported Less Than Their Historical Cost	$ 99,000,000.0		$ 99,000,000.0		$ 24,200,000
Debt Securities Reported Less Than Their Historical Cost Percent of Investment Portfolio	22.90%		22.90%		5.80%
Unrealized gains on available-for-sale securities reclassified out of AOCI	$ 0	$ 0	$ 0	$ 0

X

- Definition

Represents the Debt Securities Reported Less Than Their Historical Cost Percent of Investment Portfolio, as of the indicated date.

+ References

No definition available.

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- Definition

Represents the monetary amount of Fair Value of Debt Securities Reported Less Than Their Historical Cost, as of the indicated date.

+ References

No definition available.

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- Definition

Represents the monetary amount of Unrealized gains on available-for-sale securities reclassified out of AOCI, during the indicated time period.

+ References

No definition available.

+ Details

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- Definition

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563

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- Definition

Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26626-111562

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563

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- References

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