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EMPLOYEE BENEFIT PLANS (Deferred Comp Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Deferred salary agreements
Deferred Compensation Plans
Recorded liabilities	$ 2.9	$ 3.4
Voluntary Savings Plan - mutual funds held in trust
Deferred Compensation Plans
Minimum period for election to defer receipt of a portion of salary and incentive compensation	6 months
Voluntary Savings Plan - mutual funds held in trust | Other long-term assets
Deferred Compensation Plans
VSP assets	$ 2.4	2.2
Voluntary Savings Plan - mutual funds held in trust | Other long-term liabilities
Deferred Compensation Plans
VSP liabilities	$ 2.4	$ 2.2

X

- Definition

Represents the minimum period prior to the end of the performance period for making an election to defer receipt of a portion of salary and incentive compensation.

+ References

No definition available.

+ Details

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X

- References

No definition available.

+ Details

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X

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

+ References

No definition available.

+ Details

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X

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

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X

- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Details

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- Details

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