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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclassified out of AOCI) (LOSS) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Amounts reclassified out of each component of accumulated other comprehensive income |  |
Tax benefit | $ (6,067) | $ (5,759)
Net income | 11,181 | 10,395
Amount Reclassified from AOCI |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |
Net income | (250) | (260)
Defined Benefit Plans | Amount Reclassified from AOCI |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |
Total before tax | (376) | (429)
Tax benefit | 126 | 169
Net actuarial losses | Amount Reclassified from AOCI |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |
Total before tax | (367) | (420)
Net transition obligation | Amount Reclassified from AOCI |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |
Total before tax | (4) | (4)
Prior service cost | Amount Reclassified from AOCI |  |
Amounts reclassified out of each component of accumulated other comprehensive income |  |
Total before tax | $ (5) | $ (5)

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