Recently Adopted Accounting Standards - Narrative (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 29, 2019	Dec. 28, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for doubtful accounts	$ 5,170		$ 3,559
Retained earnings	491,429		529,723
Debt securities available-for-sale amortized cost	$ 13,000		$ 12,500
Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for doubtful accounts		$ 100
Retained earnings		$ (100)