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           PENSION AND POSTRETIREMENT BENEFITS - Health Care Costs Trend Rates (Details 6) (Postretirement Plan, USD $) 
        In Thousands, unless otherwise specified  | 
        12 Months Ended | 
|---|---|
| 
           Dec. 31, 2013 
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      |
| 
           Postretirement Plan 
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        |
| Effect of increase in health care cost trend rates | |
| 1% increase in health care cost trend rates - APBO dollar change | $ 6,611 | 
| 1% increase in health care cost trend rates - Service cost dollar change | 405 | 
| 1% increase in health care cost trend rates - percentage change | 6.50% | 
| 1% decrease in health care cost trend rates - APBO dollar change | 5,863 | 
| 1% decrease in health care cost trend rates - Service cost dollar change | $ (343) | 
| 1% decrease in health care cost trend rates - percentage change | (5.50%) | 
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- Definition 
          The effect of a one-percentage-point decrease in the assumed health care cost trend rates on the pension benefit obligation, depicted as a percentage. No definition available. 
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- Definition 
          The effect of a one-percentage-point increase in the assumed health care cost trend rates on the pension benefit obligation, depicted as a percentage. No definition available. 
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- Details 
          
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- Definition 
          Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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