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STOCKHOLDERS' EQUITY (Reclass) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018
Unrecognized Net Periodic Benefit Costs |  |
Significant reclassifications out of accumulated other comprehensive loss by component |  |
Total, pre-tax | $ (2,323) | $ (2,600)
Tax benefit | 598 | 669
Total, net of tax | (1,725) | (1,931)
Amortization of net actuarial loss |  |
Significant reclassifications out of accumulated other comprehensive loss by component |  |
Total, pre-tax | (706) | (1,562)
Amortization of prior service credit |  |
Significant reclassifications out of accumulated other comprehensive loss by component |  |
Total, pre-tax | 17 | 47
Pension settlement expense |  |
Significant reclassifications out of accumulated other comprehensive loss by component |  |
Total, pre-tax | $ (1,634) | $ (1,085)

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