EMPLOYEE BENEFIT PLANS (Net Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 14,241	$ 13,265
Interest cost	23,711	23,810
Current year actuarial gain (loss)	44,315	58,630	6,815
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	14,241	13,265	12,191
Interest cost	23,711	23,810	22,930
Expected return on assets	(28,478)	(29,184)	(29,274)
Amortization of prior service cost	(210)	(210)	(210)
Amortization of net actuarial loss	11,026	6,861	3,800
Total pension expense	20,710	14,962	9,857
Current year actuarial gain (loss)	44,315	58,630	6,815
Total change in pension obligation, net of tax	33,079	51,559	2,805
Total recognized in net periodic benefit cost and other comprehensive income	$ 53,789	$ 66,521	$ 12,662