PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6,372	$ 10,899	$ 12,742	$ 21,718
Interest cost	7,552	6,781	15,096	13,516
Expected return on plan assets	(10,425)	(8,875)	(20,838)	(17,761)
Amortization of prior service cost	157	254	315	554
Amortization of unrecognized actuarial loss	1,483	3,935	2,966	8,207
Curtailments	0	2,711	0	2,711
Net postretirement benefit cost (income)	5,139	15,705	10,281	28,945
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	70	99	141	199
Interest cost	219	209	438	417
Amortization of prior service cost	(164)	(157)	(328)	(314)
Amortization of unrecognized actuarial loss	(202)	(160)	(405)	(320)
Net postretirement benefit cost (income)	$ (77)	$ (9)	$ (154)	$ (18)