PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Detail) - Pension Plans Defined Benefit [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6,347	$ 5,914	$ 18,832	$ 20,187
Interest cost	7,503	7,422	22,915	22,410
Expected return on plan assets	(13,462)	(13,601)	(40,633)	(40,968)
Amortization of prior service cost	(11)	151	(34)	462
Amortization of unrecognized actuarial loss	2,837	5,180	9,023	12,911
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		7,345		7,345
Net postretirement benefit cost (income)	$ 3,214	$ 12,411	$ 10,103	$ 22,347