General form of registration statement for all companies including face-amount certificate companies

Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Detail)

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Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 23, 2012
Sep. 25, 2011
Dec. 25, 2011
Dec. 26, 2010
Dec. 27, 2009
Numerator:          
Net income $ 2,902 $ 3,147 $ 3,464 $ 3,291 $ 2,653
Less liquidation preference and preferred return on series X preferred stock 577 821 1,121 5,617  
Less undistributed earnings allocated to participating interests 1,594 2,289 2,302   2,620
Net income (loss) available to common stockholders 731 37 41 (2,326) 33
Less undistributed earnings allocated to participating interests 91 130 131    
Net income (loss) available to common and participating stockholders $ 2,234 $ 2,196 $ 2,212 $ (2,326) $ 2,653
Denominator:          
Weighted-average common shares outstanding 3,539,732 181,117 191,166 135,392 126,218
Basic earnings (loss) per common share $ 0.21 $ 0.20 $ 0.21 $ (17.18) $ 0.26
Weighted-average common shares outstanding 3,539,732 181,117 191,166 135,392 126,218
Dilutive effect of preferred stock conversion 7,279,884 10,049,572 10,049,572   10,049,572
Dilutive effect of stock options 682,254 615,005 611,913   462,724
Weighted-average of diluted shares 11,501,870 10,845,694 10,852,651 135,392 10,638,514
Diluted earnings (loss) per common share $ 0.19 $ 0.20 $ 0.20 $ (17.18) $ 0.25