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Leases - Summary of additional information regarding Company's Leases (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Lease cost:        
Operating lease cost $ 795 $ 857 $ 1,590 $ 1,600
Short-term lease cost 383 432 772 716
Total lease cost 1,178 $ 1,289 2,362 $ 2,316
Other information:        
Cash paid for amounts included in the measurement of operating liabilities (operating leases) $ 875   $ 1,760  
Weighted-average remaining lease term (in years) – operating leases 9 years 9 months 18 days   9 years 9 months 18 days  
Weighted-average discount rate – operating leases 6.30%   6.30%