Fair Value of Financial Instruments (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011
Fair Value of Financial Instruments (Additional Textual) [Abstract]
Marketable securities, net unrealized holding loss	$ 166	$ 492
Realized gain on available for sale securities	22	37
Nonrecurring [Member]
Fair Value of Financial Instruments (Textual) [Abstract]
Fair value adjustments for assets measured at fair value	0	0
Fair value adjustments for liabilities measured at fair value	0	0
Deferred director stock units and phantom stock units liability [Member]
Fair Value of Financial Instruments (Textual) [Abstract]
Liability, recognized income	$ 20	$ 22

The aggregate net change in the difference between the fair value and the carrying value, or in the comparative fair values, of marketable securities categorized as trading held at each balance sheet date, that was included in earnings for the period, which may have arisen from (a) securities classified as trading, (b) the unrealized holding gain (loss) on held-to-maturity securities transferred to the trading security category, and (c) the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) on available-for-sale securities transferred to trading securities during the period.

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The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items.

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