FAIR VALUE - Summary of Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial Assets
Investment securities	$ 445,018	$ 466,465
U.S. Treasury securities
Financial Assets
Investment securities	19,831
States and political subdivisions
Financial Assets
Investment securities	181,521	112,670
GSE residential MBSs
Financial Assets
Investment securities	20,518	4,293
GSE residential CMOs
Financial Assets
Investment securities	70,187	58,011
Non-agency CMOs
Financial Assets
Investment securities	25,657	16,918
Asset-backed
Financial Assets
Investment securities	126,907	211,966
Other
Financial Assets
Investment securities	397	371
Fair Value, Measurements, Recurring
Financial Assets
Loans held for sale	6,412	11,734
Totals	452,253	479,562
Financial Liabilities
Derivatives	272	1,956
Fair Value, Measurements, Recurring \| Derivatives
Financial Assets
Derivatives	823	1,363
Fair Value, Measurements, Recurring \| U.S. Treasury securities
Financial Assets
Investment securities	19,831
Fair Value, Measurements, Recurring \| States and political subdivisions
Financial Assets
Investment securities	181,521	112,670
Fair Value, Measurements, Recurring \| GSE residential MBSs
Financial Assets
Investment securities	20,518	4,293
Fair Value, Measurements, Recurring \| GSE residential CMOs
Financial Assets
Investment securities	70,187	58,011
Fair Value, Measurements, Recurring \| Non-agency CMOs
Financial Assets
Investment securities	25,657	16,918
Fair Value, Measurements, Recurring \| Private label commercial CMOs
Financial Assets
Investment securities		62,236
Fair Value, Measurements, Recurring \| Asset-backed
Financial Assets
Investment securities	126,907	211,966
Fair Value, Measurements, Recurring \| Other
Financial Assets
Investment securities	397	371
Fair Value, Measurements, Recurring \| Level 1
Financial Assets
Loans held for sale	0	0
Totals	20,228	371
Financial Liabilities
Derivatives	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Derivatives
Financial Assets
Derivatives	0	0
Fair Value, Measurements, Recurring \| Level 1 \| U.S. Treasury securities
Financial Assets
Investment securities	19,831
Fair Value, Measurements, Recurring \| Level 1 \| States and political subdivisions
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| GSE residential MBSs
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| GSE residential CMOs
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Non-agency CMOs
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Private label commercial CMOs
Financial Assets
Investment securities		0
Fair Value, Measurements, Recurring \| Level 1 \| Asset-backed
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Other
Financial Assets
Investment securities	397	371
Fair Value, Measurements, Recurring \| Level 2
Financial Assets
Loans held for sale	6,412	11,734
Totals	408,005	447,015
Financial Liabilities
Derivatives	272	1,956
Fair Value, Measurements, Recurring \| Level 2 \| Derivatives
Financial Assets
Derivatives	277	690
Fair Value, Measurements, Recurring \| Level 2 \| U.S. Treasury securities
Financial Assets
Investment securities	0
Fair Value, Measurements, Recurring \| Level 2 \| States and political subdivisions
Financial Assets
Investment securities	171,304	103,591
Fair Value, Measurements, Recurring \| Level 2 \| GSE residential MBSs
Financial Assets
Investment securities	20,518	4,293
Fair Value, Measurements, Recurring \| Level 2 \| GSE residential CMOs
Financial Assets
Investment securities	70,187	58,011
Fair Value, Measurements, Recurring \| Level 2 \| Non-agency CMOs
Financial Assets
Investment securities	12,400	0
Fair Value, Measurements, Recurring \| Level 2 \| Private label commercial CMOs
Financial Assets
Investment securities		56,730
Fair Value, Measurements, Recurring \| Level 2 \| Asset-backed
Financial Assets
Investment securities	126,907	211,966
Fair Value, Measurements, Recurring \| Level 2 \| Other
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 3
Financial Assets
Loans held for sale	0	0
Totals	24,020	32,176
Financial Liabilities
Derivatives	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Derivatives
Financial Assets
Derivatives	546	673
Fair Value, Measurements, Recurring \| Level 3 \| U.S. Treasury securities
Financial Assets
Investment securities	0
Fair Value, Measurements, Recurring \| Level 3 \| States and political subdivisions
Financial Assets
Investment securities	10,217	9,079
Fair Value, Measurements, Recurring \| Level 3 \| GSE residential MBSs
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 3 \| GSE residential CMOs
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Non-agency CMOs
Financial Assets
Investment securities	13,257	16,918
Fair Value, Measurements, Recurring \| Level 3 \| Private label commercial CMOs
Financial Assets
Investment securities		5,506
Fair Value, Measurements, Recurring \| Level 3 \| Asset-backed
Financial Assets
Investment securities	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Other
Financial Assets
Investment securities	$ 0	$ 0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

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