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EMPLOYEE BENEFIT PLANS (Components of net periodic benefit costs, Defined benefit pension plan) (Details) (Defined benefit pension plan [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Defined benefit pension plan [Member]
Components of net periodic benefit costs, Defined benefit pension plan
Service Cost	$ 1,875	$ 1,750	$ 3,750	$ 3,500
Interest Cost	1,400	1,375	2,800	2,750
Expected Return on Plan Assets	(1,825)	(1,700)	(3,650)	(3,400)
Prior Service Cost Amortization	75	100	150	200
Net Loss Amortization	1,075	850	2,150	1,700
Net Periodic Benefit Cost	$ 2,600	$ 2,375	$ 5,200	$ 4,750
Discount Rate	4.25%	5.00%	4.25%	5.00%
Long-Term Rate of Return on Assets	8.00%	8.00%	8.00%	8.00%

X

- Definition

The amount of gains or losses recognized in net periodic benefit cost.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

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-Section 50

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- Definition

The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

+ References

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X

- Definition

The interest rate used to adjust for the time value of money for the plan.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

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-Glossary Expected Long-Term Rate of Return on Plan Assets

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- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

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-Number 87

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- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

+ References

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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

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