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Investment In Marketable Securities (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
Jul. 01, 2012
Dec. 31, 2011
Investment in Marketable Securities (Textual) [Abstract]    
Common stock received 100,000 143,966
Common stock, market value $ 12.81 $ 12.15
Unrealized gain on marketable securities $ 1,236 $ 1,685