BENEFIT PLANS - Amounts Recognized in AOCI, Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amounts recognized in AOCI, net of tax [Abstract]
Total	$ (13,403)	$ (6,009)	$ 2,045
Pension Benefits [Member]
Amounts recognized in AOCI, net of tax [Abstract]
Prior service cost/(credit)	(288)	222
Net (gain) loss	(13,152)	(6,423)
Total	(13,440)	(6,201)
Post-retirement Benefits [Member]
Amounts recognized in AOCI, net of tax [Abstract]
Prior service cost/(credit)	136	136
Net (gain) loss	(99)	56
Total	$ 37	$ 192

Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.

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