Long-Term Obligations - Narrative (Details) - USD ($)	6 Months Ended	12 Months Ended
Jun. 29, 2019	Dec. 29, 2018
Debt Instrument [Line Items]
Weighted average interest rate for revolving credit facility (in hundredths)	3.80%
Loan receivable	$ 804,000
Commercial Real Estate Loan
Debt Instrument [Line Items]
Interest rate	4.60%
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 310,354,000	$ 141,106,000
Remaining borrowing capacity	$ 89,772,000
Revolving Credit Facility \| Credit Agreement
Debt Instrument [Line Items]
Term of debt agreement		5 years
Borrowing capacity available under committed portion		$ 400,000,000
Additional borrowing capacity under uncommitted portion		$ 150,000,000
Basis spread on variable rate floor (as a percentage)		0.00%
Maximum amount of unrestricted U.S. cash		$ 30,000,000
Maximum consolidated leverage ratio after acquisition		3.75
Maximum consolidated interest charge coverage ratio after acquisition		4.00
Revolving Credit Facility \| Credit Agreement \| Minimum
Debt Instrument [Line Items]
Term of debt agreement	1 month
Revolving Credit Facility \| Credit Agreement \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percentage)		0.00%
Revolving Credit Facility \| Credit Agreement \| Base Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percentage)		1.25%
Revolving Credit Facility \| Credit Agreement \| LIBOR \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percentage)		1.00%
Revolving Credit Facility \| Credit Agreement \| LIBOR \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percentage)		2.25%
Revolving Credit Facility \| Credit Agreement \| Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percentage)		0.50%
Revolving Credit Facility \| Credit Agreement \| Thirty-Day LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percentage)		0.50%
Revolving Credit Facility \| Canadian Denominated Borrowing
Debt Instrument [Line Items]
Long-term debt	$ 35,288,000
Revolving Credit Facility \| Euro-Denominated Borrowing
Debt Instrument [Line Items]
Long-term debt	16,066,000
Secured Debt \| Commercial Real Estate Loan
Debt Instrument [Line Items]
Term of debt agreement		10 years
Long-term debt		$ 10,500,000
Principal amount		21,000,000
Quarterly installment amount		$ 262,500
Fixed interest rate		4.45%
Senior Promissory Notes, due 2023 to 2028
Debt Instrument [Line Items]
Long-term debt	$ 10,000,000	$ 10,000,000
Senior Promissory Notes, due 2023 to 2028 \| Note Purchase Agreement
Debt Instrument [Line Items]
Additional borrowing capacity under uncommitted portion		115,000,000
Principal amount		$ 10,000,000
Fixed interest rate		4.90%
Senior Promissory Notes, due 2023 to 2028 \| Note Purchase Agreement \| Minimum
Debt Instrument [Line Items]
Minimum debt prepayment increment		$ 1,000,000
Capital Lease Obligations \| Sale Leaseback Arrangement
Debt Instrument [Line Items]
Interest rate	1.79%
Net purchase option	$ 1,513,000
Outstanding balance	$ 3,930,000
Debt Covenant Period One \| Secured Debt \| Commercial Real Estate Loan
Debt Instrument [Line Items]
Prepayment fee		2.00%
Debt Covenant Period Two \| Secured Debt \| Commercial Real Estate Loan
Debt Instrument [Line Items]
Prepayment fee		1.00%

Debt Instrument, Basis Spread on Variable Rate, Floor

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Debt Instrument, Net Purchase Option

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Debt Instrument, Prepayment Fee, Percentage

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The additional amount available over and above the maximum borrowing capacity under the credit facility.

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The maximum amount of unrestricted U.S. cash that can be netted against total debt.

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The maximum consolidated leverage ratio under the negative covenants of the credit facility.

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The minimum consolidated interest charge coverage ratio (calculated as income before interest and taxes, divided by interest) to be in compliance with the financial covenant under an existing debt agreement.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the required periodic payments including both interest and principal payments.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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