Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details Textual)

v2.4.0.6
Fair Value of Financial Instruments (Details Textual) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 29, 2012
Dec. 31, 2011
Sep. 29, 2012
Deferred director stock units and phantom stock units liability [Member]
Oct. 01, 2011
Deferred director stock units and phantom stock units liability [Member]
Fair Value of Financial Instruments (Textual) [Abstract]        
Liability, recognized expense     $ 74 $ 194
Fair Value of Financial Instruments (Additional Textual) [Abstract]        
Available-for-sale securities, fair value 40,502 21,832    
Available-for-sale securities, net unrealized holding loss 175 492    
Liability, fair value $ 338 $ 1,182