Leases (Maturities of lease liabilities) (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
2019 (remaining six months)	$ 2,010
2020	4,657
2021	4,572
2022	3,620
2023	2,654
2024 and thereafter	10,945
Total future minimum lease payments	28,458
Less amount of lease payment representing interest	4,962
Total operating lease liabilities	$ 23,496