PENSION PLANS (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 26,873	$ 25,262	$ 40,170
Interest cost	30,050	30,403	27,777
Expected return on plan assets	(54,629)	(41,746)	(36,303)
Prior service cost	618	662	883
Recognized net actuarial loss	16,890	6,827	15,013
Curtailment charge	7,461	377	13
Defined Benefit Plan, Net Periodic Benefit Cost	27,263	21,785	47,553
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	286	246	373
Interest cost	842	877	839
Expected return on plan assets	0	0	0
Prior service cost	(657)	(657)	(638)
Recognized net actuarial loss	(551)	(811)	(614)
Curtailment charge	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ (80)	$ (345)	$ (40)