STOCKHOLDERS' EQUITY (Reclass) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Unrecognized Net Periodic Benefit Costs
Significant reclassifications out of accumulated other comprehensive loss by component
Total, pre-tax	$ (1,745)	$ (1,505)
Tax benefit	449	387
Total, net of tax	(1,296)	(1,118)
Amortization of net actuarial loss
Significant reclassifications out of accumulated other comprehensive loss by component
Total, pre-tax	(398)	(874)
Amortization of prior service credit
Significant reclassifications out of accumulated other comprehensive loss by component
Total, pre-tax	9	23
Pension settlement expense
Significant reclassifications out of accumulated other comprehensive loss by component
Total, pre-tax	$ (1,356)	$ (654)