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INCOME TAXES - Reconciliation of Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
INCOME TAXES
Expected provision									$ 4,875	$ 4,916
Tax-exempt interest income									(808)	(853)
Increase in cash surrender value and other income from life insurance, net									(170)	(91)
ESOP Dividends									(110)	(113)
State income tax, net of Federal benefit									172	122
Other, net									31	(76)
Income Tax Expense (Benefit), Total	$ 1,481	$ 438	$ 1,255	$ 816	$ 1,135	$ 1,096	$ 693	$ 981	$ 3,990	$ 3,905
Expected provision, percentage									21.00%	21.00%
Tax-exempt interest income, percentage									(3.50%)	(3.60%)
Increase in cash surrender value and other income from life insurance, net, percentage									(0.70%)	(0.40%)
ESOP Dividends, percentage									(0.50%)	(0.50%)
State income tax, net of federal benefit, percentage									0.70%	0.50%
Other, net, percentage									0.10%	(0.30%)
Effective income tax provision, percentage									17.20%	16.70%

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Cash surrender value of life insurance in percentage.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for dividend paid to employee stock ownership plan.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the increase in cash surrender value of life insurance.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.

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