PENSION PLAN AND OTHER BENEFIT PLANS, Changes in Projected Benefit Obligation and Plan Assets, and Funded Status (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plan [Member]
Changes in projected benefit obligation [Roll Forward]
Benefit obligation, beginning of period	$ 36,186	$ 38,051
Service cost	1,045	1,195	1,074
Interest cost	1,738	1,587	1,606
Actuarial (gain) loss	8,064	(3,269)
Benefits paid	(1,489)	(1,378)
Benefit obligation, end of period	45,544	36,186	38,051
Changes in plan assets [Roll Forward]
Fair value of plan assets, beginning of period	41,782	37,239
Actual return on plan assets	3,043	5,921
Employer contributions	0	0
Benefits paid	(1,489)	(1,378)
Fair value of plan assets, end of period	43,336	41,782	37,239
Funded status [Abstract]
Funded (unfunded) status	(2,207)	5,596
Defined Benefit Health Care Plan [Member]
Changes in projected benefit obligation [Roll Forward]
Benefit obligation, beginning of period	1,490	1,534
Service cost	39	44	39
Interest cost	72	66	71
Participant contributions	84	74
Actuarial (gain) loss	177	(61)
Benefits paid	(199)	(167)
Benefit obligation, end of period	1,663	1,490	1,534
Changes in plan assets [Roll Forward]
Fair value of plan assets, beginning of period	0	0
Employer contributions	115	93
Participant contributions	84	74
Benefits paid	(199)	(167)
Fair value of plan assets, end of period	0	0	0
Funded status [Abstract]
Funded (unfunded) status	(1,663)	(1,490)
Executive Supplemental Pension Plan [Member]
Changes in projected benefit obligation [Roll Forward]
Benefit obligation, beginning of period	1,116	1,162
Service cost	38	40	35
Interest cost	55	48	51
Actuarial (gain) loss	110	(59)
Benefits paid	(75)	(75)
Benefit obligation, end of period	1,244	1,116	1,162
Changes in plan assets [Roll Forward]
Fair value of plan assets, beginning of period	0	0
Employer contributions	75	75
Benefits paid	(75)	(75)
Fair value of plan assets, end of period	0	0	0
Funded status [Abstract]
Funded (unfunded) status	$ (1,244)	$ (1,116)

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Actual Return on Plan Assets (Component of Net Periodic Postretirement Benefit Cost)

-URI http://asc.fasb.org/extlink&oid=6504192

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(1)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost)

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Gain or Loss

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ References

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-Paragraph 1

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Projected Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6522206

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

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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.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Postretirement Benefits

-URI http://asc.fasb.org/extlink&oid=6521376

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Benefits

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The increase in the fair value of plan assets from contributions made by the employer.

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The amount of contributions made by plan participants. This item represents a periodic increase to the plan obligation and an increase to plan assets.

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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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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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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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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.

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