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Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Oct. 02, 2015
Jul. 03, 2015
Apr. 03, 2015
Jan. 02, 2015
Oct. 03, 2014
Jun. 27, 2014
Mar. 28, 2014
Dec. 27, 2013
Oct. 02, 2015
Oct. 03, 2014
Sep. 27, 2013
Net income $ 1,167 $ 9,997 $ 3,646 $ (4,194) $ (786) $ 4,698 $ 7,404 $ (2,193) $ 10,616 $ 9,123 $ 19,327
Less: Undistributed earnings reallocated to non-vested shareholders                 (191) (304) (792)
Dilutive earnings                 $ 10,425 $ 8,819 $ 18,535
Dilutive stock options and restricted stock units                   3 6
Weighted average common shares - Dilutive                 9,727 9,635 9,523
Class A [Member]                      
Weighted average common shares - Basic                 8,515 8,420 8,305
Net (loss) income per common share - Basic $ 0.12 $ 1.01 $ 0.37 $ (0.42) $ (0.08) $ 0.48 $ 0.75 $ (0.22) $ 1.08 $ 0.93 $ 1.98
Net income per common Class A and B share - Diluted 0.12 1.00 0.36 (0.42) (0.08) 0.47 0.74 (0.22) $ 1.06 $ 0.90 $ 1.95
Class B [Member]                      
Weighted average common shares - Basic                 1,212 1,212 1,212
Net (loss) income per common share - Basic 0.11 0.92 0.34 (0.42) (0.07) 0.43 0.68 (0.22) $ 0.98 $ 0.84 $ 1.79
Net income per common Class A and B share - Diluted $ 0.12 $ 1.00 $ 0.36 $ (0.42) $ (0.08) $ 0.47 $ 0.74 $ (0.22) $ 1.06 $ 0.90 $ 1.95