Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Stock Based Compensation (Details2)

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Stockholders' Equity and Stock Based Compensation (Details2) (Options, USD $)
In Millions, except Share data, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Options
  
Number of Options  
Outstanding at the beginning of the period (in shares) 374,140
Exercised (in share) 53,375
Outstanding at the end of the period (in shares) 320,765
Exercisable at the end of the period (in shares) 320,765
Weighted Average Exercise Price  
Outstanding at the beginning of the period (in dollars per share) $ 8.33
Exercised (in dollars per share) $ 7.66
Outstanding at the end of the period (in dollars per share) $ 8.44
Exercisable at the end of the period (in dollars per share) $ 8.44
Weighted Average Remaining Contractual Term  
Outstanding at the end of the period 2 years
Exercisable at the end of the period 2 years
Aggregate Intrinsic Value  
Outstanding at the end of the period (in dollars) $ 1.3
Exercisable at the end of the period (in dollars) $ 1.3
Market value (in dollars per share) $ 12.25