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Quarterly Operating Results (Unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 4 Months Ended 12 Months Ended
Sep. 09, 2011
Jun. 17, 2011
Mar. 25, 2011
Sep. 10, 2010
Jun. 18, 2010
Mar. 26, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Quarterly Financial Data [Abstract]                      
Total revenue $ 160,986 $ 150,168 $ 103,753 $ 132,423 $ 131,894 $ 94,148 $ 223,323 $ 180,858 $ 638,230 $ 539,323 $ 493,642
Total operating expenses 148,107 137,867 109,816 129,132 119,408 97,520 201,733 167,485 597,523 513,545 483,675
Operating (loss) income 12,879 12,301 (6,063) 3,291 12,486 (3,372) 21,590 13,373 40,707 25,778 9,967
(Loss) income from continuing operations (678) (729) (10,863) (4,773) 944 (7,547) 4,530 517 (7,740) (10,859) (9,665)
(Loss) income from discontinued operations (337) 173 (181) 1,239 (105) (799) 407 1,351 62 1,687 (1,425)
Net (loss) income $ (1,015) $ (556) $ (11,044) $ (3,534) $ 839 $ (8,346) $ 4,937 $ 1,868 $ (7,678) $ (9,172) $ (11,090)
Basic and diluted (loss) earnings per share:                      
Continuing operations (in dollars per share) $ (0.01) $ 0.00 $ (0.07) $ (0.03) $ 0.01 $ (0.06) $ 0.03 $ 0.00 $ (0.05) $ (0.07) $ (0.09)
Discontinued operations (in dollars per share) $ 0.00 $ 0.00 $ 0.00 $ 0.01 $ 0.00 $ (0.01) $ 0.00 $ 0.01 $ 0.00 $ 0.01 $ (0.01)
Basic and diluted (loss) earnings per share (in dollars per share) $ (0.01) $ 0.00 $ (0.07) $ (0.02) $ 0.01 $ (0.07) $ 0.03 $ 0.01 $ (0.05) $ (0.06) $ (0.10)