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Long-Term Obligations (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 27, 2014	Sep. 27, 2014	Dec. 28, 2013	Aug. 03, 2012
Debt obligations [Line Items]
Total Long-Term Obligations	$ 23,000,000	$ 23,000,000	$ 38,635,000
Less: Current Maturities	(625,000)	(625,000)	(625,000)
Long-Term Obligations, less Current Maturities	22,375,000	22,375,000	38,010,000
Weighted average interest rate for long-term obligations (in hundredths)	2.56%	2.56%
Line of Credit Facility, Maximum Unrestricted Domestic Cash	25,000,000	25,000,000
Revolving Credit Facility
Debt obligations [Line Items]
Total Long-Term Obligations	17,000,000	17,000,000	32,260,000
Term of unsecured revolving credit facility	5 years
Borrowing capacity available under committed portion				100,000,000
Additional borrowing capacity				50,000,000
Maturity date		Nov. 01, 2018
Interest rate description	Interest on any loans outstanding under the 2012 Credit Agreement accrues and is payable quarterly in arrears at one of the following rates selected by the Company: (i) the highest of (a) the federal funds rate plus 0.50% plus an applicable margin of 0% to 1%, (b) the prime rate, as defined, plus an applicable margin of 0% to 1% and (c) the Eurocurrency rate, as defined, plus 0.50% plus an applicable margin of 0% to 1% or (ii) the Eurocurrency rate, as defined, plus an applicable margin of 1% to 2%. The applicable margin is determined based upon the ratio of the Company's total debt to earnings before interest, taxes, depreciation, and amortization (EBITDA), as defined in the 2012 Credit Agreement. For this purpose, total debt is defined as total debt less up to $25,000,000 of unrestricted U.S. cash.
Maximum consolidated leverage ratio	3.5
Minimum consolidated interest coverage ratio	3
Remaining Borrowing Capacity	80,025,000	80,025,000
Face amount of debt	100,000,000	100,000,000
Revolving Credit Facility | Federal Funds Rate
Debt obligations [Line Items]
Basis spread on variable rate		federal funds rate
Basis spread on variable rate (in hundredths)		0.50%
Revolving Credit Facility | Federal Funds Rate | Minimum
Debt obligations [Line Items]
Basis spread on variable rate (in hundredths)	0.00%
Revolving Credit Facility | Federal Funds Rate | Maximum
Debt obligations [Line Items]
Basis spread on variable rate (in hundredths)	1.00%
Revolving Credit Facility | Prime Rate
Debt obligations [Line Items]
Basis spread on variable rate		prime rate
Revolving Credit Facility | Prime Rate | Minimum
Debt obligations [Line Items]
Basis spread on variable rate (in hundredths)	0.00%
Revolving Credit Facility | Prime Rate | Maximum
Debt obligations [Line Items]
Basis spread on variable rate (in hundredths)	1.00%
Revolving Credit Facility | Eurocurrency Rate
Debt obligations [Line Items]
Basis spread on variable rate		Eurocurrency rate
Basis spread on variable rate (in hundredths)		0.50%
Revolving Credit Facility | Eurocurrency Rate | Minimum
Debt obligations [Line Items]
Basis spread on variable rate (in hundredths)	0.00%
Revolving Credit Facility | Eurocurrency Rate | Maximum
Debt obligations [Line Items]
Basis spread on variable rate (in hundredths)	1.00%
Revolving Credit Facility | Eurocurrency Rate Two
Debt obligations [Line Items]
Basis spread on variable rate		Eurocurrency rate
Revolving Credit Facility | Eurocurrency Rate Two | Minimum
Debt obligations [Line Items]
Basis spread on variable rate (in hundredths)	1.00%
Revolving Credit Facility | Eurocurrency Rate Two | Maximum
Debt obligations [Line Items]
Basis spread on variable rate (in hundredths)	2.00%
Commercial Real Estate Loan
Debt obligations [Line Items]
Total Long-Term Obligations	$ 6,000,000	$ 6,000,000	$ 6,375,000

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

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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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Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

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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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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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