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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
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