ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
AOCI rollforward
Balance	$ (17,706)	$ (23,223)
Change during the period:
Before-tax amount	(34)	(423)
Reclassification adjustment, net of taxes:
Amortization of net loss	458	1,104
Total activity for the period	424	681
Balance	(17,282)	(22,542)
Pension Adjustment
AOCI rollforward
Balance	(15,181)	(20,908)
Reclassification adjustment, net of taxes:
Amortization of net loss	458	1,104
Total activity for the period	458	1,104
Balance	(14,723)	(19,804)
Foreign Currency Translation
AOCI rollforward
Balance	(2,525)	(2,315)
Change during the period:
Before-tax amount	(34)	(423)
Reclassification adjustment, net of taxes:
Total activity for the period	(34)	(423)
Balance	$ (2,559)	$ (2,738)