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CONTRIBUTING EMPLOYEE OWNERSHIP PLAN (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] |  |  |
Employer matching contributions to employee ownership plan | $ 5.2 | $ 5.2 | $ 5.2
Initial vesting period (in years) | 2 |  |
Initial vesting period vested percentage | 25.00% |  |
Additional vesting percentage for each additional year of service | 25.00% |  |
Years of service for full vesting | 5 |  |
Vesting percentage after five years | 100.00% |  |
Number of days an employee is prohibited from trading out of the fund to which the transfer was made | 7 |  |

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- Definition Additional vesting percentage for each year of service, after the initial two years of service. + References No definition available. + Details
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- Definition Minimum term of service before an employee becomes vested in the plan. + References No definition available. + Details
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- Definition Initial vesting percentage after an employee completes two years of service. + References No definition available. + Details
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- Definition Number of days employees are prohibited from trading out of the fund to which the transfer was made. + References No definition available. + Details
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- Definition Vesting percentage after an employee serves five years. + References No definition available. + Details
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- Definition Number of years an employee serves before full vesting in the plan. + References No definition available. + Details
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- 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=6414718&loc=d3e28014-114942 + Details
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