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Commitments and Contingencies - Future Minimum Rental Payments under Non-Cancelable Operating Leases with Original Maturities of Greater than 12 Months (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2017 $ 3,788
2018 2,043
2019 847
2020 741
Thereafter 3,243
Total $ 10,662