Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Stock Based Compensation (Details 3)

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Stockholders' Equity and Stock Based Compensation (Details 3) (2006 Plan and 2012 Plan, Restricted stock awards, USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
2006 Plan and 2012 Plan | Restricted stock awards
   
Shares    
Nonvested shares at the beginning of the period 199,550  
Granted (in shares) 45,689  
Vested (in shares) (30,174)  
Forfeited (in shares) (25,275)  
Nonvested shares at the end of the period 189,790  
Weighted Average Grant Date Fair Value    
Nonvested shares at the beginning of period (in dollars per share) $ 12.02  
Granted (in dollars per share) $ 15.12  
Vested (in dollars per share) $ 10.84  
Forfeited (in dollars per share) $ 11.28  
Nonvested shares at the end of period (in dollars per share) $ 12.70  
Unrecognized compensation cost (in dollars) $ 2.4  
Weighted average period for recognition of unrecognized compensation cost 2 years 9 months 18 days  
Share-based compensation cost (in dollars) $ 0.3 $ 0.3