Lease Commitments - Summary of Weighted Average Remaining Lease Terms, Discount Rates and Supplemental Cash Flow Information for All Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2020	Mar. 29, 2019
Lease Cost [Abstract]
Weighted average remaining lease term (years)	6 years 4 months 24 days	3 years 6 months 14 days
Weighted average remaining discount rate	2.06%	1.73%
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflow from operating leases	$ 1,570
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 667