ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
AOCI rollforward
Balance	$ (17,706)	$ (23,223)
Change during the period:
Before-tax amount	205	(398)
Reclassification adjustment, net of taxes:
Amortization of net loss	306	918
Total activity for the period	511	520
Balance	(17,195)	(22,703)
Pension Adjustment
AOCI rollforward
Balance	(15,181)	(20,908)
Reclassification adjustment, net of taxes:
Amortization of net loss	306	918
Total activity for the period	306	918
Balance	(14,875)	(19,990)
Foreign Currency Translation
AOCI rollforward
Balance	(2,525)	(2,315)
Change during the period:
Before-tax amount	205	(398)
Reclassification adjustment, net of taxes:
Total activity for the period	205	(398)
Balance	$ (2,320)	$ (2,713)