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Long-Term Debt and Financing Arrangements - Summary of Aggregate Principal Payments (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Debt Disclosure [Abstract]  
2013 $ 437
2014 1,771
2015 1,806
2016 1,841
2017 1,877
2018 and thereafter 952
Total Notes $ 8,684