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EMPLOYEE BENEFIT PLANS - Components of net periodic cost (benefit) (Details) - Retirement Income Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
EMPLOYEE BENEFIT PLANS
Interest cost	$ 37	$ 58	$ 111	$ 116
Expected return on plan assets	(72)	(73)	(216)	(146)
Amortization of net losses	18	24	54	48
Net periodic cost (benefit)	$ (17)	$ 9	$ (51)	$ 18

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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- Definition

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