Fair Value Measurements and Fair Value of Financial Instruments - Carrying Value and Fair Value of Debt Obligations (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019
Carrying Value
Debt Obligations:
Revolving credit facility	$ 260,485	$ 265,419
Commercial real estate loan	19,163	19,425
Senior promissory notes	10,000	10,000
Debt obligations	289,648	294,844
Fair Value
Debt Obligations:
Revolving credit facility	260,485	265,419
Commercial real estate loan	21,656	20,541
Senior promissory notes	10,662	10,803
Debt obligations	$ 292,803	$ 296,763