PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 8,449	$ 10,061	$ 30,167	$ 30,194
Interest cost	7,163	6,564	20,679	19,695
Expected return on plan assets	(9,306)	(8,382)	(27,067)	(25,152)
Amortization of prior service cost	165	300	719	901
Amortization of unrecognized actuarial loss	3,560	2,755	11,767	8,266
Curtailments	(2,818)	0	(107)	0
Net postretirement benefit cost (income)	7,213	11,298	36,158	33,904
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	81	109	280	329
Interest cost	213	232	630	695
Amortization of prior service cost	(158)	(158)	(472)	(472)
Amortization of unrecognized actuarial loss	(140)	(180)	(460)	(539)
Net postretirement benefit cost (income)	$ (4)	$ 3	$ (22)	$ 13