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EMPLOYEE BENEFIT PLANS - Pre-tax amounts recognized in other comprehensive income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
EMPLOYEE BENEFIT PLANS
Settlement loss		$ 600,000
Retirement Income Plan
EMPLOYEE BENEFIT PLANS
Net loss (gain)	$ 879,000	(154,000)	$ 300,000
Amortization of net loss	(73,000)	(98,000)	(87,000)
Net transition obligation (asset)	0	0	0
Settlement loss	0	(647,000)	0
Amount recognized in accumulated other comprehensive (loss) income	$ 806,000	$ (899,000)	$ 213,000

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