Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans (Details 2)

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Benefit Plans (Details 2) (Employee Stock Option [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
 6 Months Ended
Jun. 30, 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) 1,120
Granted, Weighted Average Exercise Price (in dollars per share) $ 1.98
Exercised, Shares (in shares) (69,942)
Exercised, Weighted Average Exercise Price (in dollars per share) $ 0.55
Forfeited, cancelled or expired, Shares (in shares) (7,386)
Forfeited, cancelled or expired, Weighted Average Exercise Price (in dollars per share) $ 3.33
Outstanding Shares, Ending (in shares) 363,372
Outstanding, Weighted Average Exercise Price, Ending (in dollars per share) $ 1.34
Exercisable Shares, Ending (in shares) 142,613
Exercisable, Weighted Average Exercise Price (in dollars per share) $ 1.76
Outstanding, Weighted Average Remaining Contractual Term, Ending (in years) 6.06
Exercisable, Weighted Average Remaining Contractual Term (in years) 4.00
Outstanding, Aggregate Intrinsic Value, Ending $ 296,646
Exercisable, Aggregate Intrinsic Value $ 119,270