Long-Term Debt (Details) (USD $)	12 Months Ended
Jan. 03, 2015	Dec. 28, 2013	Apr. 06, 2006
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt	$ 197,791,000us-gaap_LongTermDebt	$ 150,455,000us-gaap_LongTermDebt
Less: current portion	(55,000)us-gaap_LongTermDebtCurrent	(364,000)us-gaap_LongTermDebtCurrent
Long-term debt	197,736,000us-gaap_LongTermDebtNoncurrent	150,091,000us-gaap_LongTermDebtNoncurrent
Long-term Debt, by Maturity [Abstract]
2014	55,000
2015	197,736,000
2016	0
2017	0
2018	0
Thereafter	0
Amount outstanding			150,000,000
Long-term debt, fair value	154,000,000us-gaap_LongTermDebtFairValue
Notes Payable to Banks [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt	47,700,000	0
Note payable, interest rate	1.80%	0.00%
Senior Notes Due In 2016 [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt	150,000,000	150,000,000
Senior notes, interest rate	5.54%	5.54%	5.54%
Other Notes and Amounts [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt	91,000	455,000
Loan Term, September 28, 2011 [Member]
Long-term Debt, by Maturity [Abstract]
Current borrowing capacity	150,000,000
Maximum borrowing capacity	250,000,000
Option to increase, additional borrowings capacity	100,000,000
Payments of debt issuance costs	$ 1,200,000

Line of Credit Facility, Option to Increase, Additional Borrowings

No definition available.

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- Definition

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

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

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-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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- Definition

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.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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-Subparagraph (SX 210.5-02.19(b),22(b))

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-Number 210

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- Definition

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.

+ References

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- Definition

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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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-Name Accounting Standards Codification

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year.

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-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year.

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year.

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year.

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year.

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year.

+ References

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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-Publisher SEC

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-Subparagraph (SX 210.5-02.22)

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- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 230

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-Section 45

-Paragraph 15

-Subparagraph (e)

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