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Long-Term Debt - Schedule of Long-Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Long-term debt $ 462,967 $ 72,441
Less current portion of long-term debt 9,262 4,798
Long-term debt due after one year 453,705 67,643
Working Capital Revolver Loan [Member]
   
Debt Instrument [Line Items]    
Long-term debt      
7.75% Senior Secured Notes due 2019 [Member]
   
Debt Instrument [Line Items]    
Long-term debt 425,000  
Secured Promissory Note [Member]
   
Debt Instrument [Line Items]    
Long-term debt 29,555  
Secured Term Loan [Member]
   
Debt Instrument [Line Items]    
Long-term debt   68,438
Other, with a current weighted-average interest rate of 3.99%, most of which is secured primarily by machinery, equipment [Member]
   
Debt Instrument [Line Items]    
Long-term debt $ 8,412 $ 4,003