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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]      
Valuation Allowances and Reserves, Balance, Beginning of Year $ 608    
Valuation Allowances and Reserves, Additions Charged to Cost and Expense 7,100    
Valuation Allowances and Reserves, Additions Charged to Other Accounts 960    
Valuation Allowances and Reserves, Deductions 0    
Valuation Allowances and Reserves, Balance, End of Year 8,668    
Allowance for doubtful accounts [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Valuation Allowances and Reserves, Balance, Beginning of Year 608 608 1,308
Valuation Allowances and Reserves, Additions Charged to Cost and Expense 0 0 111
Valuation Allowances and Reserves, Additions Charged to Other Accounts 0 0 0
Valuation Allowances and Reserves, Deductions 0 0 (811)
Valuation Allowances and Reserves, Balance, End of Year 608 608 608
Valuation allowance [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Valuation Allowances and Reserves, Balance, Beginning of Year 0    
Valuation Allowances and Reserves, Additions Charged to Cost and Expense 7,100    
Valuation Allowances and Reserves, Additions Charged to Other Accounts 960    
Valuation Allowances and Reserves, Deductions 0    
Valuation Allowances and Reserves, Balance, End of Year $ 8,060