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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Components of AOCL (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (1,793,000)	$ (9,162,000)	$ (6,127,000)
Other comprehensive income (loss) before reclassification		7,352,000	(2,589,000)
Amounts reclassified from accumulated other comprehensive loss	0	17,000	40,000
Total other comprehensive income (loss)	11,422,000	7,369,000	(2,549,000)
Reclassification of certain tax effects from accumulated other comprehensive loss			(486,000)
Ending balance	9,629,000	(1,793,000)	(9,162,000)
(Losses) and Gains on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(526,000)	(393,000)	(571,000)
Other comprehensive income (loss) before reclassification		(133,000)	178,000
Amounts reclassified from accumulated other comprehensive loss		0	0
Total other comprehensive income (loss)	(625,000)	(133,000)	178,000
Reclassification of certain tax effects from accumulated other comprehensive loss			0
Ending balance	(1,151,000)	(526,000)	(393,000)
Unrealized (Losses) and Gains on Securities | Available-for-sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,221,000)	(8,705,000)	(5,460,000)
Other comprehensive income (loss) before reclassification		7,467,000	(2,799,000)
Amounts reclassified from accumulated other comprehensive loss		17,000	40,000
Total other comprehensive income (loss)	12,001,000	7,484,000	(2,759,000)
Reclassification of certain tax effects from accumulated other comprehensive loss			(486,000)
Ending balance	10,780,000	(1,221,000)	(8,705,000)
Unrealized (Losses) and Gains on Securities | Held-to-maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(46,000)	(64,000)	(96,000)
Other comprehensive income (loss) before reclassification		18,000	32,000
Amounts reclassified from accumulated other comprehensive loss		0	0
Total other comprehensive income (loss)	46,000	18,000	32,000
Reclassification of certain tax effects from accumulated other comprehensive loss			0
Ending balance	$ 0	$ (46,000)	$ (64,000)

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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