STOCKHOLDERS' EQUITY (Reclass) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Unrecognized Net Periodic Benefit Costs
Significant reclassifications out of accumulated other comprehensive loss by component
Total, pre-tax	$ (2,989)	$ (2,022)
Tax benefit	1,162	787
Total, net of tax	(1,827)	(1,235)
Amortization of net actuarial loss
Significant reclassifications out of accumulated other comprehensive loss by component
Total, pre-tax	(1,079)	(1,169)
Amortization of prior service credit
Significant reclassifications out of accumulated other comprehensive loss by component
Total, pre-tax	47	47
Pension settlement expense
Significant reclassifications out of accumulated other comprehensive loss by component
Total, pre-tax	$ (1,957)	$ (900)