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EMPLOYEE RETIREMENT PLANS (Details 3)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Discount rate for determining projected benefit obligation	3.71%	4.35%
Long-term rate of return on plan assets	7.00%
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate for determining projected benefit obligation	4.33%	4.60%	4.17%
Long-term rate of return on plan assets	7.00%	7.50%	7.50%
Discount rate in effect for determining service cost	0.00%	4.81%	4.17%
Discount rate in effect for determining interest cost	3.63%	3.93%	4.17%
Rate of compensation increase	0.00%	4.00%	4.00%
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate for determining projected benefit obligation	4.41%	4.67%	4.17%
Long-term rate of return on plan assets	0.00%	0.00%	0.00%
Discount rate in effect for determining service cost	4.62%	4.84%	4.17%
Discount rate in effect for determining interest cost	3.92%	4.18%	4.17%
Rate of compensation increase	0.00%	4.00%	4.00%

X

- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

+ 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 (k)(1)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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X

- Definition

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.

+ 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 (k)(3)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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X

- Definition

Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

+ 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 (k)(2)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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X

- Definition

The interest rate used to adjust for the time value of money relating to determining interest cost.

+ References

No definition available.

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X

- Definition

The interest rate used to adjust for the time value of money relating to determining service cost.

+ References

No definition available.

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