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EMPLOYEE BENEFIT PLANS (Details 6) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Pension Plan
EMPLOYEE BENEFIT PLANS
Total investments	$ 152,187	$ 125,058	$ 117,856
Employer contribution receivable		2,270
Total	152,187	127,328
Defined Benefit Pension Plan \| Cash
EMPLOYEE BENEFIT PLANS
Total investments	6,222	1,004
Defined Benefit Pension Plan \| Equity securities: Collective Russell 3000 Equity Index Fund
EMPLOYEE BENEFIT PLANS
Total investments	61,451	52,792
Defined Benefit Pension Plan \| Equity securities: Fidelity Spartan U.S. Equity Index Fund
EMPLOYEE BENEFIT PLANS
Total investments	34,482	29,735
Defined Benefit Pension Plan \| Fixed Income
EMPLOYEE BENEFIT PLANS
Total investments	50,032	41,527
Group life insurance plan \| Money Market Fund
EMPLOYEE BENEFIT PLANS
Total investments	$ 6,174	$ 6,193	$ 6,217

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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