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PENSION AND POST-RETIREMENT PLANS - DEFINED CONTRIBUTION PLANS (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
401(K) plan |  |  |
Defined Contribution Plans |  |  |
Employer matching contribution (as a percent) | 6.00% |  |
Employer matching contribution expenses | $ 2.1 | $ 2.0 | $ 1.6
Profit sharing plan |  |  |
Defined Contribution Plans |  |  |
Profit sharing expense recorded | $ 0.0 | $ 1.9 | $ 1.6

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- Definition Represents the amount of the profit sharing expenses recorded during the period for defined contribution plans. + References No definition available. + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + 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 Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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