Annual report pursuant to Section 13 and 15(d)

Payment of Dividends (Details)

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Payment of Dividends (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
0 Months Ended 12 Months Ended
Dec. 10, 2012
Dec. 05, 2011
Dec. 08, 2010
Mar. 22, 2010
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Payments of Dividends [Abstract]              
Dividends paid (in dollars per share) $ 0.25 $ 0.25 $ 0.25 $ 0.25 $ 0.25 $ 0.25 $ 0.50
Dividend payment dates Dec. 10, 2012 Dec. 05, 2011 Dec. 08, 2010 Mar. 22, 2010      
Total outlay for dividends $ 1,596 $ 1,580         $ 3,166