Amount of the total principal payments to be made at final maturity of debt.

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Debt Instrument, Average Remaining Term

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Applicable marginal rate of debt instrument basis spread.

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Debt Instrument, Net Purchase Option

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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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The term of the unsecured revolving credit facility agreement and commercial real estate loan.

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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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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments applied to principal.

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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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Weighted average interest rate of debt outstanding.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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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 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.

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The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Short- and Long-Term Obligations - Additional Information (Details)				3 Months Ended	12 Months Ended
	Apr. 04, 2016 USD ($)	Mar. 29, 2016 USD ($)	May 04, 2006 USD ($)	Apr. 02, 2016 USD ($)	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)
Debt Instrument [Line Items]
Unamortized debt issuance costs					$ 266,000
Loans receivable					233,000
Outstanding capital lease obligations					4,309,000	$ 0
Revolving credit facility
Debt Instrument [Line Items]
Term of debt agreement		5 years
Borrowing capacity available under committed portion		$ 100,000,000			100,000,000
Additional borrowing capacity		$ 50,000,000
Maturity date		Nov. 01, 2018
Maximum amount of unrestricted U.S. cash					$ 25,000,000
Maximum consolidated leverage ratio		3.5			3.5
Minimum consolidated interest coverage ratio		3			3
Long-term debt					$ 61,494,000	$ 26,000,000
Remaining borrowing capacity					$ 36,518,000
Weighted average interest rate for long-term obligations (in hundredths)					1.52%	1.81%
Revolving credit facility \| Euro-Denominated Borrowing
Debt Instrument [Line Items]
Proceeds from credit facility				$ 29,866,000
Long-term debt					$ 27,494,000
Revolving credit facility \| Federal funds rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percentage)		0.50%
Revolving credit facility \| Federal funds rate \| Minimum
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)		0.00%
Revolving credit facility \| Federal funds rate \| Maximum
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)		1.00%
Revolving credit facility \| Prime rate \| Minimum
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)		0.00%
Revolving credit facility \| Prime rate \| Maximum
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)		1.00%
Revolving credit facility \| Eurocurrency rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percentage)		0.50%
Revolving credit facility \| Eurocurrency rate \| Minimum
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)		0.00%
Revolving credit facility \| Eurocurrency rate \| Maximum
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)		1.00%
Revolving credit facility \| Eurocurrency rate two \| Minimum
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)		1.00%
Revolving credit facility \| Eurocurrency rate two \| Maximum
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)		2.00%
Commercial real estate loan
Debt Instrument [Line Items]
Long-term debt					0	$ 5,250,000
Weighted average interest rate for long-term obligations (in hundredths)						6.38%
Face amount of debt instrument			$ 10,000,000
Quarterly payment of principal			$ 125,000
Terms of debt agreements			10 years
Amount due at maturity			$ 5,000,000
Commercial real estate loan \| LIBOR
Debt Instrument [Line Items]
Margin rate of debt instrument (in hundredths)			0.75%
Capital Lease Obligations \| Sale Leaseback Arrangement
Debt Instrument [Line Items]
Sale-leaseback financing arrangement, interest rate	3.30%
Net purchase option	$ 1,390,000
Outstanding capital lease obligations					4,188,000
Capital Lease Obligations \| PAAL Equipment Capital Lease
Debt Instrument [Line Items]
Capital lease obligations, interest rate	3.44%
Capital lease obligations, average remaining term	3 years 1 month 6 days
Outstanding capital lease obligations					121,000
Other Borrowings, due 2017 to 2023
Debt Instrument [Line Items]
Other borrowings					$ 608,000	$ 0