EMPLOYEE BENEFIT PLANS (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	$ 13,633	$ 12,307	$ 11,582
Return On Plan Assets Over Last 15 Years	7.39%
Defined Benefit Plan, Contributions by Employer	$ 0	$ 10,000
Assumed discount rate	5.50%	6.00%	6.00%
Expected long-term rate of return on plan assets	7.75%	8.00%	8.00%
Assumed rate of salary increases	4.50%	4.50%	4.50%
Return On Plan Assets Over Last 10 Years	6.89%
Return Plan Assets Over Last 5 Years	4.66%
Number Of Days Until Elgible For 401 K Plan	31 days
Percent Of Employee Contribution Match To 401 K	75.00%