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EMPLOYEE BENEFIT PLANS (Additional Information) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Maximum age to receive health care coverage 65 years    
Accumulated benefit obligation $ 45,005 $ 24,555  
Defined Contribution Pension [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Required service period for employee participation P30D    
Basic contributions as a percentage of annual salary 50.00%    
Company matching contribution, percent of match 200.00%    
Company matching contribution, percent of employees' annual pay 3.00%    
Contribution to the qualified defined contribution plans 10,450 9,969 7,204
Pension Benefits [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Estimated future contributions in 2014 $ 15,500    
Pension Benefits [Member] | Equity Securities [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Plan asset allocations 60.00%    
Pension Benefits [Member] | Fixed Income Securities [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Plan asset allocations 40.00%