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EMPLOYEE BENEFIT PLANS (Details 3) (Nonunion Defined Benefit Pension Plan, USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended | 1 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Minimum | Dec. 31, 2013 Maximum | Dec. 31, 2013 Large Cap U.S. Equity | Dec. 31, 2012 Large Cap U.S. Equity | Dec. 31, 2013 Mid Cap U.S. Equity | Dec. 31, 2012 Mid Cap U.S. Equity | Dec. 31, 2013 Small Cap U.S. Equity | Dec. 31, 2012 Small Cap U.S. Equity | Dec. 31, 2013 International Equity | Dec. 31, 2012 International Equity | Dec. 31, 2013 Emerging Market Equity | Dec. 31, 2012 Emerging Market Equity | Dec. 31, 2013 Debt Instruments | Dec. 31, 2012 Debt Instruments | Dec. 31, 2013 Floating Rate Loan Fund | Dec. 31, 2012 Floating Rate Loan Fund | Dec. 31, 2013 Cash and Cash Equivalents | Dec. 31, 2012 Cash and Cash Equivalents | Dec. 31, 2013 Actively managed portfolio of short-term debt instruments | Dec. 31, 2013 Actively managed portfolio of short duration debt instruments | Jan. 31, 2014 Subsequent Event participant | Jan. 31, 2014 Subsequent Event Minimum | Jan. 31, 2014 Subsequent Event Maximum | Jan. 31, 2014 Subsequent Event Debt Instruments | Jan. 31, 2014 Subsequent Event Cash and Cash Equivalents
Employee Benefit Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period over which the possibility of experiencing a substantial loss is limited by adequate diversification under the long-term asset allocation policy | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Target allocations, acceptable ranges, and actual asset allocations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Target allocation (as a percent) | 100.00% |  |  |  | 20.00% |  | 10.00% |  | 10.00% |  | 15.00% |  | 0.00% |  | 20.00% |  | 5.00% |  | 20.00% |  |  |  |  |  |  | 30.00% | 10.00%
Acceptable Range, minimum (as a percent) |  |  |  |  | 15.00% |  | 8.00% |  | 8.00% |  | 11.00% |  | 0.00% |  | 15.00% |  | 3.00% |  | 10.00% |  |  |  |  |  |  |  |
Acceptable Range, maximum (as a percent) |  |  |  |  | 30.00% |  | 12.00% |  | 12.00% |  | 19.00% |  | 0.00% |  | 25.00% |  | 10.00% |  | 25.00% |  |  |  |  |  |  |  |
Weighted-Average Allocation (as a percent) | 100.00% | 100.00% |  |  | 23.80% | 32.10% | 10.70% | 11.10% | 10.50% | 11.10% | 12.50% | 11.10% | 0.00% | 5.00% | 17.60% | 22.40% | 3.60% | 4.00% | 21.30% | 3.20% |  |  |  |  |  |  |
Performance period of recognized market indices used to compare investment performance |  |  | 3 years | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum performance period of investment fund used to compare investment performance | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum performance period of total fund used to compare investment performance | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of plan participants for which vested pension benefits were settled |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 375 |  |  |  |
Premium paid to purchase nonparticipating annuity contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.4 |  |  |  |
Pension benefit obligation settled with nonparticipating annuity contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23.3 |  |  |  |
Pension settlement expense, pre-tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.0 | $ 3.0 |  |
Maximum maturity period of investments under investment restrictions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |  |  |  |
Maximum percentage of portfolio investments under investment restrictions represented by a single issue or issuer other than U.S. government securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |
Maximum percentage of portfolio under investment restrictions invested in BBB rated debt or collectively in mortgage-backed securities and asset-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |
Maximum average effective duration period of investments under investment restrictions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |

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