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Stock-based Compensation and Awards (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Y
Summary of stock option activity  
Granted, Stock Options 924
Exercised, Stock Options (33)
Cancelled, Stock Options (744)
Options outstanding, Stock Options, Ending balance 3,271
Options outstanding, Stock Options, Beginning balance 3,124
Options exercisable, Stock Options 2,029
Granted, Weighted Average Exercise Price $ 15.33
Exercised, Weighted Average Exercise Price $ 16.16
Cancelled, Weighted Average Exercise Price $ 28.90
Options outstanding, Weighted Average Exercise Price, Beginning balance $ 31.20
Options outstanding, Weighted Average Exercise Price, Ending balance $ 27.39
Options exercisable, Weighted Average Exercise Price $ 34.20
Options outstanding, Weighted Average Remaining Life 4.1
Options exercisable, Weighted Average Remaining Life 2.9
Options outstanding, Aggregate Intrinsic Value $ 0
Options exercisable, Aggregate Intrinsic Value $ 0