ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Amounts Reclassified from AOCI
Total reclassifications, before income tax	$ 15,254	$ 13,487
Income tax benefit	(3,181)	(4,316)
Total reclassifications, net of income taxes	12,073	9,171
Amount Reclassified from Accumulated Other Comprehensive Income
Amounts Reclassified from AOCI
Total reclassifications, before income tax	(160)	(389)
Income tax benefit	47	159
Total reclassifications, net of income taxes	(113)	(230)
Amount Reclassified from Accumulated Other Comprehensive Income | Amortization of defined benefit pension plan and the defined benefit plan component of the SERP
Amounts Reclassified from AOCI
Prior service credit	19	19
Transition obligation	(1)	(7)
Actuarial losses	(113)	(126)
Amount Reclassified from Accumulated Other Comprehensive Income | Realized losses on cash flow hedges
Amounts Reclassified from AOCI
Realized losses on cash flow hedges	$ (65)	$ (275)