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BENEFIT PLANS (Employer Contributions for Plan) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Employer contribution	$ 5,488,000	$ 4,855,000	$ 4,509,000
Employer Contributions	44,068,000us-gaap_DefinedBenefitPlanBenefitsPaid	41,546,000us-gaap_DefinedBenefitPlanBenefitsPaid
2015 (estimated)	13,718,000
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Employer Contributions	7,739,000	6,258,000	6,834,000
2015 (estimated)	$ 8,964,000

The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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