BENEFIT PLANS, Amounts Recognized in AOCI, Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amounts recognized in AOCI, net of tax [Abstract]
Total	$ 2,045	$ 11,204	$ (168)
Pension Benefits [Member]
Amounts recognized in AOCI, net of tax [Abstract]
Prior service cost/(credit)	(49)	1,509
Net (gain) loss	1,920	9,431
Total	1,871	10,940
Post-retirement Benefits [Member]
Amounts recognized in AOCI, net of tax [Abstract]
Prior service cost/(credit)	136	135
Net (gain) loss	38	129
Total	$ 174	$ 264

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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