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EMPLOYEE BENEFIT PLANS (Details Textual)	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Minimum Number Of Annual Employee Hours	1,000
Defined Benefit Plan Maximum Percent Of Assets Comprised Of Entity Common Stock	10.00%
Defined Contribution Plan Maximum Annual Contribution Per Union Employee Percent	4.00%	4.00%
Defined Contribution Plan Amount Of Entity Common Stock And Securities Held	$ 1,100,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match				6.00%	2.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent				3.00%	1.00%
Defined Contribution Plan, Cost Recognized	469,000	$ 447,000	$ 433,000
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	$ 1,561,000
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	60.00%
Equity Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	50.00%
Equity Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	60.00%
Debt Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	40.00%
Debt Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	50.00%
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amount of Employer and Related Party Securities Included in Plan Assets	$ 1,200,000
Defined Benefit Plan Maximum Percent Of Assets Comprised Of Entity Common Stock	10.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.75%	7.75%	8.00%
Defined Benefit Plan Percent Of Assets Comprised Of Entity Common Stock	3.40%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 3,500,000

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- Definition

Defined Benefit Plan, Maximum Percent Of Assets Comprised Of Entity Common Stock.

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Defined Benefit Plan, Minimum Number Of Annual Employee Hours.

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The percentage of assets comprised of common stock.

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Maximum percentage of union employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

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The amount of employer securities or securities of parties related to the employer that are included in plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (n)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

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-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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Amount of cost for defined contribution plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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Percentage employer matches of the employee's percentage contribution matched.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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