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INVESTMENT SECURITIES - Continuous Unrealized Loss on Investment (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Gross unrealized losses	$ (2,346)	$ (486)
Less than 12 months, Fair value	111,712	26,711
Twelve months or more, Gross unrealized losses	(717)	(327)
Twelve months or more, Fair value	18,848	16,790
Total, Gross unrealized losses	(3,063)	(813)
Total, Fair value	130,560	43,501
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Gross unrealized losses	(70)	(7)
Less than 12 months, Fair value	1,115	1,196
Twelve months or more, Gross unrealized losses	(228)	(185)
Twelve months or more, Fair value	1,322	1,432
Total, Gross unrealized losses	(298)	(192)
Total, Fair value	2,437	2,628
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Gross unrealized losses	(176)	(8)
Less than 12 months, Fair value	10,954	925
Twelve months or more, Gross unrealized losses	0	0
Twelve months or more, Fair value	0	0
Total, Gross unrealized losses	(176)	(8)
Total, Fair value	10,954	925
Residential collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Gross unrealized losses	(701)	(95)
Less than 12 months, Fair value	21,942	7,391
Twelve months or more, Gross unrealized losses	(282)	0
Twelve months or more, Fair value	7,159	0
Total, Gross unrealized losses	(983)	(95)
Total, Fair value	29,101	7,391
Commercial collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Gross unrealized losses	(184)	(39)
Less than 12 months, Fair value	9,875	6,687
Twelve months or more, Gross unrealized losses	(62)	(142)
Twelve months or more, Fair value	1,956	15,358
Total, Gross unrealized losses	(246)	(181)
Total, Fair value	11,831	22,045
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Gross unrealized losses	(1,163)	(337)
Less than 12 months, Fair value	49,953	10,512
Twelve months or more, Gross unrealized losses	(145)	0
Twelve months or more, Fair value	8,411	0
Total, Gross unrealized losses	(1,308)	(337)
Total, Fair value	58,364	$ 10,512
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Gross unrealized losses	(52)
Less than 12 months, Fair value	17,873
Twelve months or more, Gross unrealized losses	0
Twelve months or more, Fair value	0
Total, Gross unrealized losses	(52)
Total, Fair value	$ 17,873

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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