Quarterly report pursuant to Section 13 or 15(d)

Benefits Plans (Details 2)

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Benefits Plans (Details 2) (Employee Stock Option [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Year
Employee Stock Option [Member]
  
Stock options activity under share based payment plans  
Outstanding Shares, Beginning (in shares) 439,580
Outstanding, Weighted Average Exercise Price, Beginning (in dollars per share) $ 1.25
Granted, Shares (in shares) 275
Granted, Weighted Average Exercise Price (in dollars per share) $ 2.04
Exercised, Shares (in shares) (34,955)
Exercised, Weighted Average Exercise Price (in dollars per share) $ 0.65
Forfeited, cancelled or expired, Shares (4,281)
Forfeited, cancelled or expired, Weighted Average Exercise Price (in dollars per share) $ 2.67
Outstanding Shares, Ending (in shares) 400,619
Outstanding, Weighted Average Exercise Price, Ending (in dollars per share) $ 1.29
Outstanding, Weighted Average Remaining Contractual Term, Ending (in years) 6.00
Outstanding, Aggregate Intrinsic Value, Ending $ 501,494
Exercisable Shares, Ending (in shares) 148,585
Exercisable, Weighted Average Exercise Price (in dollars per share) $ 1.78
Exercisable, Weighted Average Remaining Contractual Term (in years) 4.20
Exercisable, Aggregate Intrinsic Value $ 169,371