INVESTMENT SECURITIES (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Net Investment Income [Line Items]
Amortized cost	$ 298,227	$ 259,421
Gross unrealized gains	9,572	3,718
Gross unrealized losses	(833)	(1,174)
Estimated fair value	306,966	261,965
US Government Agencies Debt Securities [Member]
Net Investment Income [Line Items]
Amortized cost	276,191	239,617
Gross unrealized gains	8,474	3,371
Gross unrealized losses	(832)
Estimated fair value	283,833	241,887
Gross Realized Losses		(1,101)
US States and Political Subdivisions Debt Securities [Member]
Net Investment Income [Line Items]
Amortized cost	15,288	13,308
Gross unrealized gains	1,013	212
Gross unrealized losses		(73)
Estimated fair value	16,301	13,447
Corporate Debt Securities [Member]
Net Investment Income [Line Items]
Amortized cost	6,748	6,496
Gross unrealized gains	85	135
Gross unrealized losses	(1)
Estimated fair value	$ 6,832	$ 6,631

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454

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