Summary of Maturities of Lease Liabilities and Reconciliation of Lease Liabilities Recognized Under Topic 842 (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
Maturity of lease liability
2020	$ 11,718
2021	12,891
2022	11,080
2023	11,230
2024	11,471
Thereafter	9,654
Total minimum lease payments	68,044
Less: imputed interest	(12,478)
Total operating lease liabilities	55,566	$ 60,100
Included in the condensed consolidated balance sheet:
Current portion of lease liabilities within other current liabilities	$ 7,846
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Lease liabilities	$ 47,720
Total operating lease liabilities	$ 55,566	$ 60,100