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CONTRIBUTING EMPLOYEE OWNERSHIP PLAN (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Defined Contribution Plan Disclosure [Line Items] |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 6.6 | $ 6.6
Employer matching contributions to employee ownership plan | $ 2.7 | $ 2.7
Minimum |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Contribution To Individual Retirement Account Percentage Of Employees Eligible Compensation | 5.00% |
Maximum |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Contribution To Individual Retirement Account Percentage Of Employees Eligible Compensation | 10.00% |

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- Definition Contribution to an individual retirement account as a percentage of employee's eligible compensation. + 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 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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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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