Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation and Employee Benefit Plans Stock-Based Compensation and Employee Benefits Plan - Fair Value of Stock Options (Details)

v2.4.0.8
Stock-Based Compensation and Employee Benefit Plans Stock-Based Compensation and Employee Benefits Plan - Fair Value of Stock Options (Details) (Stock Option [Member], USD $)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair value per share $ 4.03 $ 3.24
Risk-free interest rate 1.70% 0.71%
Dividend yield 0.00% 0.00%
Expected life (years) 4 years 6 months 23 days 4 years 275 days
Volatility 51.00% 56.00%