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EMPLOYEE BENEFIT PLANS (Details) - Pension Plan [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Defined Contribution Plan Disclosure [Line Items] |  |  |
Credited service period | 1 year |  |
Pension expense | $ 3,087 | $ 3,126 | $ 3,100
Employer contributions to profit sharing and retirement savings-investment plan | $ 2,512 | $ 2,493 | $ 2,533

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- Definition Amount of contributions made to profit sharing and retirement savings-investment plans. + References No definition available. + Details
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- Definition Service period for non-union employees, for the company to sponsor defined contribution pension plan. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References 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 + Details
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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. + Details
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- Details
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