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Notes Payable and Other Noncurrent Liabilities - Payments Due under Notes Payable (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Debt Disclosure [Abstract]    
2016 $ 6,625  
2017 6,636  
2018 6,691  
2019 59,925  
Notes Payable, Total $ 79,877 $ 86,493