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COMPREHENSIVE INCOME (LOSS) - Components (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) on available-for-sale debt securities, Before-Tax Amount	$ 2,609	$ (812)	$ 7,778	$ (3,586)
Unrealized holding (losses) gains on available-for-sale debt securities, Income Tax Effect	(576)	173	(1,711)	754
Unrealized holding (losses) gains on available-for-sale debt securities, Net of Tax Amount	2,033	(639)	6,067	(2,832)
Reclassification adjustment for (gains) losses realized in income, Before-Tax Amount	0	0	0	0
Reclassification adjustment for gains (losses) realized in income, Income Tax Effect	0	0	0	0
Reclassification adjustment for (gains) losses realized in income. Net of Tax Amount	0	0	0	0
Other comprehensive (loss) income from available-for-sale debt securities, Before-Tax Amount	2,609	(812)	7,778	(3,586)
Other comprehensive loss (income) from available-for-sale debt securities, Income tax effect	(576)	173	(1,711)	754
Other comprehensive (loss) income from available-for-sale debt securities, Net-of-Tax Amount	2,033	(639)	6,067	(2,832)
Changes from plan amendments and actuarial gains and losses, Before-Tax Amount	0	0	69	394
Changes from plan amendments and actuarial gains and losses, Income Tax Effect			(15)	(83)
Changes from plan amendments and actuarial gains and losses, Net-of-Tax Amount			54	311
Amortization of prior service cost and net actuarial loss and curtailment gain included in net periodic benefit cost, Before-Tax Amount	(22)	(20)	(44)	(510)
Amortization of prior service cost and net actuarial loss and curtailment gain included in net periodic benefit cost, Income Tax Effect	5	4	10	107
Amortization of prior service cost and net actuarial loss and curtailment gain included in net periodic benefit cost, Net-of-Tax Amount	(17)	(16)	(34)	(403)
Other comprehensive loss on unfunded retirement obligations, Before-Tax Amount	(22)	(20)	25	(116)
Other comprehensive loss on unfunded retirement obligations, Income Tax Effect	5	4	(5)	24
Other comprehensive loss on unfunded retirement obligations, Net-of-Tax Amount	(17)	(16)	20	(92)
Total other comprehensive (income) loss, Before-Tax Amount	2,587	(832)	7,803	(3,702)
Total other comprehensive income (loss), Income Tax Effect	(571)	177	(1,716)	778
Total other comprehensive income (loss), Net-of-Tax Amount	$ 2,016	$ (655)	$ 6,087	$ (2,924)

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