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PENSION PLANS (Asset Allocations) (Details) - Pension Plan - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS |  |
Asset allocations by asset category | 100.00% | 100.00%
Equity Securities |  |
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS |  |
Asset allocations by asset category | 53.90% | 50.60%
Equity securities included the entity's common stock | $ 0.1 | $ 0.1
Debt Securities |  |
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS |  |
Asset allocations by asset category | 42.30% | 34.00%
Other |  |
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS |  |
Asset allocations by asset category | 3.80% | 15.40%

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- Definition 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 + Details
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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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