Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation and Employee Benefit Plans Summary of Stock Option Activity (Details)

v2.4.0.8
Stock-Based Compensation and Employee Benefit Plans Summary of Stock Option Activity (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Schedule of Stock Option Activity[Roll Forward]  
Number of options outstanding, beginning balance 3,194
Stock options granted in the period (shares) 606
Stock options exercised in period (shares) (63)
Stock options canceled in the period (shares) 0
Number of options outstanding, ending balance 3,737
Schedule of Stock Option, Weighted Average Exercise Price[Roll Foward]  
Outstanding, weighted-average exercise price-beginning $ 4.81
Weighted-average exercise price, granted $ 6.93
Weighted-average exercise price, exercised $ 2.42
Weighted-average exercise price, canceled $ 0.00
Outstanding, weighted-average exercise price-ending $ 5.19
Schedule of Stock Option Activity, Additional Disclosures  
Stock options vested and expected to vest (shares) 3,713
Stock options exercisable(shares) 2,075
Outstanding, weighted-average contractual term(years) 5 years 4 months 20 days
Vested and expected to vest, weighted-average contractual term(years) 5 years 4 months 17 days
Exercisable, weighted-average contractual term(years) 4 years 11 months 19 days
Weighted-average exercise price, vested and expected to vest $ 5.19
Weighted-average exercise price, exercisable $ 4.62
Outstanding aggregate intrinsic value $ 19,703
Vested and expected to vest, aggregate intrinsic value 19,597
Exercisable, aggregate intrinsic value $ 12,181