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STOCKHOLDERS' EQUITY (Reclass) (Details) - USD ($) $ in Thousands | 3 Months Ended
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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)

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