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EMPLOYEE BENEFIT PLANS - Change in Plan Assets and Benefit Obligations Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of actuarial (loss)	$ (163)	$ (176)
Actuarial (gain) loss	(351)	125
Total recognized in accumulated other comprehensive income	(514)	(51)
Total recognized in net periodic pension cost recognized and other comprehensive income	(369)	(63)
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of actuarial (loss)	0	0
Actuarial (gain) loss	(126)	(257)
Amortization of prior service credit	(83)	(83)
Total recognized in accumulated other comprehensive income	(209)	(340)
Accrued post-retirement liability recognized	$ 1,718	$ 1,555

X

- Definition

Represents the entire liability recognized in the balance sheet that is associated with the defined benefit plans including amount recognized in accumulated other comprehensive income.

+ References

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- Definition

Represents the amounts recognized in net periodic benefit cost and other comprehensive income (loss).

+ References

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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.

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- Definition

Amount after tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580

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-Publisher FASB
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

Amount after tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans.

+ References

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-Publisher FASB
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Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 220
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Amount after tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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-Paragraph 1
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