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Equity and Stock Based-Compensation (Details 1) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Stock options activity  
Number of Options Outstanding, beginning of year, shares 6,460
Weighted Average Exercise Price Per Option Outstanding, beginning of year $ 21.30
Number of Options, Granted 213
Weighted Average Exercise Price Per Option, Granted $ 8.43
Number of Options, Exercised (4)
Weighted Average Exercise Price Per Option Exercised $ 8.35
Number of Options, Forfeited/Expired (709)
Weighted Average Exercise Price Per Option, Forfeited/Expired $ 21.49
Number of Options Outstanding, end of year, shares 5,960
Weighted Average Exercise Price Per Option Outstanding, end of year $ 20.83
Number of Options exercisable at end of year 5,396
Weighted Average Exercise Price Per Option Exercisable at End of Year $ 22.17