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Leases - Schedule of Future Minimum Lease Payments for Capital Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Leases [Abstract]    
2014 $ 2,697  
2015 2,697  
2016 2,145  
2017 1,315  
2018     
Thereafter     
Total minimum lease payments 8,854  
Amount representing interest (958)  
Present value of minimum lease payments with average interest rates of 7.04% 7,895  
Current portion of capital lease obligation 2,216 3,295
Capital lease obligation, less current portion $ 5,679 $ 9,179