PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6,370	$ 10,819
Interest cost	7,544	6,735
Expected return on plan assets	(10,413)	(8,886)
Amortization of prior service cost	158	300
Amortization of unrecognized actuarial loss	1,483	4,272
Net postretirement benefit cost (income)	5,142	13,240
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	71	100
Interest cost	219	208
Amortization of prior service cost	(164)	(157)
Amortization of unrecognized actuarial loss	(203)	(160)
Net postretirement benefit cost (income)	$ (77)	$ (9)