ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	$ (18,746)	$ (16,702)
Change during the period:
Before-tax amount	431	(430)
Adoption of accounting standards (Note 2)	87	0	$ (356)
Reclassification adjustment, net of taxes:
Amortization of net loss	347	328
Total activity for the period	(1,954)	(102)
Balance	(20,700)	(16,804)
ASU No. 2018-02, (Topic 220)
Change during the period:
Adoption of accounting standards (Note 2)	(2,732)
Pension Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(15,878)	(14,470)
Change during the period:
Before-tax amount	0	0
Reclassification adjustment, net of taxes:
Amortization of net loss	347	328
Total activity for the period	(2,385)	328
Balance	(18,263)	(14,142)
Pension Adjustment | ASU No. 2018-02, (Topic 220)
Change during the period:
Adoption of accounting standards (Note 2)	(2,732)
Unrealized Gain (Loss) On Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance		15
Change during the period:
Before-tax amount		(15)
Reclassification adjustment, net of taxes:
Amortization of net loss		0
Total activity for the period		(15)
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(2,868)	(2,247)
Change during the period:
Before-tax amount	431	(415)
Reclassification adjustment, net of taxes:
Amortization of net loss	0	0
Total activity for the period	431	(415)
Balance	$ (2,437)	$ (2,662)