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EMPLOYEE BENEFIT PLANS - Additional Information (Details) (USD $)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]          
Pension Contributions         $ 0
Pension settlement charges 4,316,000 0 4,316,000 0  
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax     (17,369,000) (1,140,000)  
Pension Expense 4,170,000 (142,000) 4,185,000 (285,000)  
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year $ 0   $ 0