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Adoption of ASC 842 - Maturities of Operating Lease Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Leases [Abstract]    
For the remainder of 2019 $ 1,947  
2020 4,999  
2021 3,742  
2022 3,071  
2023 2,758  
Thereafter 3,103  
Total lease payments 19,620  
Less imputed interest (3,431)  
Lease obligations $ 16,189 $ 15,900