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Long-Term Debt and Financing Arrangements - Schedule of Outstanding Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Equipment Notes $ 32,483 $ 8,246
Less current portion (5,974) (1,771)
Total long-term debt 26,509 6,475
Equipment Notes due by February 28, 2019 [Member]
   
Debt Instrument [Line Items]    
Equipment Notes 24,676   
Equipment Notes due by June 19, 2018 [Member]
   
Debt Instrument [Line Items]    
Equipment Notes $ 7,807 $ 8,246