Leases - Other Information Relating to Leases (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2020	Mar. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows relating to operating leases	$ (2,009)	$ (1,576)
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 14,605
Weighted average remaining lease term in years
Operating leases	7 years 3 months 7 days	4 years 7 months 17 days
Weighted average discount rate
Operating leases	5.90%	6.20%