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EMPLOYEE BENEFIT PLANS Projected Benefit Payments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 412,668	$ 350,974
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	0
2012	15,756
2013	16,794
2014	18,005
2015	19,542
2016	21,283
2017-2021	$ 131,733

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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