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Summary of Significant Accounting Policies (Details 5) - USD ($) | Jan. 02, 2016 | Dec. 27, 2014
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Level 1 [Member] |  |  |
Asset |  |  |
Financial Liabilities Fair Value Disclosure |  | $ 0 |
Level 2 [Member] |  |  |
Asset |  |  |
Financial Liabilities Fair Value Disclosure |  | 28,000 |
Level 3 [Member] |  |  |
Asset |  |  |
Financial Liabilities Fair Value Disclosure |  | 0 |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] |  |  |
Asset |  |  |
Total assets measured at fair value |  | 110,817,000 | $ 109,843,000
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Money Market Funds [Member] |  |  |
Asset |  |  |
Total assets measured at fair value |  | 110,817,000 | 109,843,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] |  |  |
Asset |  |  |
Total assets measured at fair value |  | 33,124,000 | 36,166,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Bonds [Member] |  |  |
Asset |  |  |
Total assets measured at fair value | [1] | 33,124,000 | $ 36,166,000
Derivative Financial Instruments, Liabilities [Member] | Level 1 [Member] |  |  |
Asset |  |  |
Financial Liabilities Fair Value Disclosure | [2] | 0 |
Derivative Financial Instruments, Liabilities [Member] | Level 2 [Member] |  |  |
Asset |  |  |
Financial Liabilities Fair Value Disclosure | [2] | 28,000 |
Derivative Financial Instruments, Liabilities [Member] | Level 3 [Member] |  |  |
Asset |  |  |
Financial Liabilities Fair Value Disclosure | [2] | $ 0 |
[1] | (1) The bond investments are valued based on observable market values as of the Company's reporting date. The bond investments are recorded at fair value and marked-to-market at the end of each reporting period. The realized and unrealized gains and losses are included in comprehensive income for that period.
[2] | (2) Derivative instruments are valued using an income approach based on the present value of the forward rate less the contract rate multiplied by the notional amount.

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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