PENSION PLANS (Detail) (Pension Plans Defined Benefit [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 36,276	$ 33,332	$ 27,067
Interest cost	26,361	25,248	24,234
Expected return on plan assets	(31,635)	(28,904)	(29,039)
Prior Service Cost	1,210	1,111	646
Defined Benefit Plan, Amortization of Gains (Losses)	5,464	1,815	2,287
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	194	(1,245)	1,418
Net periodic postretirement benefit cost	$ 37,870	$ 31,357	$ 26,613