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Stock-Based Compensation Shares Authorized by Exercise Price Range (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price, lower range limit (in usd per share) $ 7.68
Exercise price, upper range limit (in usd per share) $ 23.16
$15.05
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price, lower range limit (in usd per share) $ 15.05
Options Outstanding and Exercisable, Shares 63
Options Outstanding and Exercisable, Weighted average exercise price (in usd per share) $ 15.05
Options Outstanding and Exercisable, Weighted average remaining life 1 month
Options Outstanding and Exercisable, Aggregate Intrinsic Value $ 0
$23.16
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price, upper range limit (in usd per share) $ 23.16
Options Outstanding and Exercisable, Shares 325
Options Outstanding and Exercisable, Weighted average exercise price (in usd per share) $ 23.16
Options Outstanding and Exercisable, Weighted average remaining life 1 month
Options Outstanding and Exercisable, Aggregate Intrinsic Value $ 0