PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Detail) - Pension Plans Defined Benefit [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5,914	$ 6,227	$ 20,187	$ 18,969
Interest cost	7,422	7,799	22,410	22,895
Expected return on plan assets	(13,601)	(10,521)	(40,968)	(31,359)
Amortization of prior service cost	151	157	462	472
Amortization of unrecognized actuarial loss	5,180	2,147	12,911	5,113
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	7,345	0	7,345	0
Net postretirement benefit cost (income)	$ 12,411	$ 5,809	$ 22,347	$ 16,090