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Quarterly Financial Information (Unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income (Loss) from Operations before Extraordinary Items [Abstract]                      
Net revenues $ 70,675 $ 71,017 $ 102,446 $ 100,150 $ 109,794 $ 113,263 $ 118,021 $ 61,784 $ 344,288 $ 402,862 $ 338,942
Gross profit 13,558 14,646 23,251 20,988 25,726 26,690 26,182 5,994 72,443 84,592 66,294
Net loss applicable to common stockholders $ (14,912) $ (31,933) $ (4,500) $ (37,921) $ (3,404) $ 4,498 $ (3,898) $ (22,088) $ (89,266) $ (24,892) $ (33,450)
Basic and diluted net loss per common share $ (0.44) $ (0.97) $ (0.14) $ (1.17) $ (0.11) $ 0.14 $ (0.12) $ (0.69) $ (2.72) $ (0.78) $ (1.06)