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Long-term Debt and Obligations - Scheduled Future Principal Payments under Outstanding Debt Obligations (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Debt Disclosure [Abstract]    
2014 $ 63  
2015 251  
2016 207  
2017 48  
2018 and thereafter 20,179  
Long-term debt $ 20,748 $ 18,807