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Debt Parenthetical (Details) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Line of Credit Facility [Line Items]    
Long-term Debt $ 301,516,000 $ 301,613,000
Asset-based revolving credit facility [Member]
   
Line of Credit Facility [Line Items]    
Long-term Debt $ 0 $ 0