Quarterly report pursuant to Section 13 or 15(d)

Share - Based Compensation (Details)

v2.4.0.6
Share - Based Compensation (Details) (USD $)
 6 Months Ended
Jun. 30, 2012
Stock options granted pursuant to Equity Incentive Plan  
Outstanding, Shares, Beginning of Period 206,400
Outstanding, Weighted average exercise price, Beginning of Period $ 7.62
Stock options granted 0
Granted, Weighted average exercise price $ 0.00
Exercised, Shares (25,042)
Exercised, Weighted average exercise price $ 6.95
Cancelled, Shares (208)
Cancelled, Weighted average exercise price $ 6.95
Outstanding, Shares, End of Period 181,150
Outstanding, Weighted average exercise price, End of Period $ 7.71
Exercisable, Shares 181,150
Exercisable, Weighted Average Exercise Price $ 7.71
Outstanding, Weighted Average Remaining Contractual Term 1 year
Exercisable, Weighted Average Remaining Contractual Term 1 year
Outstanding, Aggregate Intrinsic Value $ 2,293,725
Exercisable, Aggregate Intrinsic Value $ 2,293,725
Summary of nonvested shares related to Equity Incentive Plan  
Nonvested, Shares, Beginning of Period 740,493
Nonvested, Weighted average grant - date fair value, Beginning of period $ 19.02
Granted, Shares 0
Granted, Weighted average grant - date fair value $ 0.00
Vested, Shares (26,667)
Vested, Weighted average grant - date fair value $ 30.55
Cancelled, Shares (33,000)
Cancelled, Weighted average grant - date fair value $ 27.6
Nonvested, Shares, End of Period 680,286
Nonvested, Weighted average grant - date fair value, End of period $ 18.15