Annual report pursuant to Section 13 and 15(d)

Quarterly Results of Operations (unaudited) (Details)

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Quarterly Results of Operations (unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 4 Months Ended 12 Months Ended
Dec. 30, 2012
Sep. 30, 2012
Jul. 08, 2012
Dec. 25, 2011
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Oct. 02, 2011
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Jul. 10, 2011
Apr. 15, 2012
Apr. 17, 2011
Dec. 30, 2012
Dec. 25, 2011
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Dec. 26, 2010
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Quarterly Results of Operations (unaudited)                      
Total revenues $ 240,679 $ 213,317 $ 223,677 $ 205,981 $ 206,244 $ 215,795 $ 299,459 $ 286,830 $ 977,132 $ 914,850 $ 864,269
Income from operations 12,203 5,836 11,423 4,479 3,256 9,070 15,747 11,195 45,209 28,001 9,733
Net income 6,492 3,533 7,748 2,905 2,069 6,894 10,558 8,708 28,331 20,577 7,299
Basic earning per share (in dollars per share) $ 0.46 $ 0.25 $ 0.53 $ 0.20 $ 0.14 $ 0.45 $ 0.72 $ 0.56 $ 1.97 $ 1.36 $ 0.47
Diluted earning per share (in dollars per share) $ 0.45 $ 0.24 $ 0.52 $ 0.20 $ 0.14 $ 0.44 $ 0.71 $ 0.56 $ 1.93 $ 1.34 $ 0.46
Number of restaurants impaired       2 1         3 4
Pre-tax non-cash impairment charge       $ 2,400 $ 1,900         $ 4,337 $ 6,116