INVESTMENT SECURITIES - Narrative (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($) security position	Dec. 31, 2019 USD ($)
Debt Securities, Available-for-sale [Line Items]
Current-period provision for expected credit losses	$ 112
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	$ (443)	$ (1,296)
Debt Securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in security portfolio \| security	510
Number of securities in unrealized loss position \| security	40
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position \| security	27
SBA pool securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position \| position	7
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	$ (96)	(409)
State, county and municipal securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	$ 0	(2)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Number of securities in unrealized loss position \| security	6
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	$ (233)	(2)
Collateral Pledged
Debt Securities, Available-for-sale [Line Items]
Pledged securities, carrying value	$ 438,700	$ 679,600

Number Of Securities In Security Portfolio

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563

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- Definition

Amount of increase in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and beneficial interest, purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 9
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455

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Amount of restricted 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 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455

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