Leases - Summary of Supplemental Balance Sheet Information Related to Operating Leases (Detail) $ in Thousands	Sep. 28, 2019 USD ($)
Leases [Abstract]
Operating lease right-of-use assets	$ 33,870
Other accrued liabilities	$ 5,303
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent
Long-term operating lease liabilities	$ 31,413
Total operating lease liabilities	$ 36,716
Weighted average remaining lease term (years)	9 years 5 months 4 days
Weighted average discount rate	5.18%