Debt and Financing Arrangements - Narrative (Details) - USD ($)		12 Months Ended
	Feb. 21, 2017	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Line of Credit Facility [Line Items]
Interest expense		$ 1,700,000	$ 1,500,000
Amortization of debt issuance costs		300,000	300,000
Capitalized interest		0	0	$ 0
Outstanding amount on letters of credit		1,100,000	1,300,000
Available for borrowing under the bank credit facility		$ 63,900,000	$ 63,700,000
Weighted average interest rate		4.10%	3.90%	3.50%
Term Loan
Line of Credit Facility [Line Items]
Interest expense		$ 1,200,000	$ 1,200,000
Credit Agreement
Line of Credit Facility [Line Items]
Minimum interest coverage ratio	3.5
Maximum total leverage ratio	3.00
Aggregate consideration limit	$ 10,000,000.0
Leverage ratio at time of acquisition	3.25
Annual capital expenditures limit	$ 100,000,000.0
Percentage of EBITDA	35.00%
Credit Agreement | Bank Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 95,000,000.0
Credit Agreement | Bank Credit Facility | Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Credit Agreement | Bank Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Credit Agreement | Bank Credit Facility | LIBOR | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%
Credit Agreement | Bank Credit Facility | LIBOR | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%
Credit Agreement | Bank Credit Facility | Bank of America's Prime Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.75%
Credit Agreement | Bank Credit Facility | Bank of America's Prime Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%
Credit Agreement | Term Loan
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 30,000,000.0
Credit Agreement | Revolving Loan Portion
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 65,000,000.0