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Notes Payable - Summary of Aggregate Future Minimum Payments of Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
2017 $ 1,213  
2018 6,163  
2019 167,641  
2020 166  
2021 175  
Thereafter 327,118  
Total $ 502,476 $ 418,698