XML 19 R26.htm IDEA: XBRL DOCUMENT v2.4.0.8
Share-Based Compensation (Details 2) (USD $)
 9 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Options
Sep. 30, 2012
Options
Sep. 30, 2013
Options
Sep. 30, 2012
Options
Sep. 30, 2013
Options
Maximum
Sep. 30, 2013
Options
Minimum
Sep. 12, 2013
Employee options
Mar. 31, 2013
Employee options
Jun. 12, 2013
Director options
Sep. 30, 2013
RSUs
Sep. 30, 2012
RSUs
Sep. 30, 2013
RSUs
Sep. 30, 2012
RSUs
Feb. 18, 2013
2003 Incentive Plan
Chairman, Chief Executive Officer, and President
Common Stock
Sep. 30, 2013
2003 Incentive Plan
Chairman, Chief Executive Officer, and President
Common Stock
Sep. 30, 2012
2003 Incentive Plan
Chairman, Chief Executive Officer, and President
Common Stock
Sep. 30, 2013
2003 Incentive Plan
Chairman, Chief Executive Officer, and President
Common Stock
Sep. 30, 2012
2003 Incentive Plan
Chairman, Chief Executive Officer, and President
Common Stock
Dec. 31, 2012
2003 Incentive Plan
Chairman, Chief Executive Officer, and President
Common Stock
Shares Under Options                                          
Outstanding at the beginning of the period (in shares)         493,888                                
Granted (in shares)         97,362       30,000 60,000 7,362                    
Exercised (in shares)         (117,500)                                
Outstanding at the end of the period (in shares)     473,750   473,750                                
Options exercisable at the end of the period (in shares)     367,500   367,500                                
Vested and expected to vest at the end of the period (in shares)     473,750   473,750                                
Weighted Average Exercise Price                                          
Outstanding at the beginning of the period (in dollars per share)         $ 5.47                                
Granted (in dollars per share)         $ 19.74       $ 21.67 $ 18.85 $ 19.08                    
Exercised (in dollars per share)         $ 2.85                                
Outstanding at the end of the period (in dollars per share)     $ 9.05   $ 9.05                                
Options exercisable at the end of the period (in dollars per share)     $ 6.31   $ 6.31                                
Vested and expected to vest at the end of the period (in dollars per share)     $ 9.05   $ 9.05                                
Aggregate Intrinsic Value                                          
Outstanding at the end of the period     $ 6,498,890   $ 6,498,890                                
Options exercisable at the end of the period     6,048,878   6,048,878                                
Vested and expected to vest at the end of the period     6,498,890   6,498,890                                
Assumptions used to determine the intrinsic fair market value of options using Black Scholes option pricing model                                          
Expected volatility (as a percent)             50.00% 34.00%                          
Expected dividends (as a percent)         0.00%                                
Risk free interest rate (as a percent)             0.70% 0.40%                          
Expected term             5 years 3 years 3 months 18 days                          
Weighted average grant date fair value of options granted (in dollars per share)         $ 5.84                                
The total intrinsic value of all options exercised         2,070,527 2,028,138                              
Restricted Stock Units                                          
Unvested at the beginning of the period (in shares)                           108,866              
Awards                               400,000         300,000
Awarded (in shares)                           10,600              
Shares vested (in shares)                           (61,635)              
Forfeited / cancelled (in shares)                           (6,931)              
Unvested at the end of the period (in shares)                       50,900   50,900              
Weighted Average Award Date Fair Value                                          
Unvested at the beginning of the period (in dollars per share)                           $ 8.77              
Awarded (in dollars per share)                           $ 19.97              
Shares vested (in dollars per share)                           $ 6.67              
Forfeited / cancelled (in dollars per share)                           $ 13.23              
Unvested at the end of the period (in dollars per share)                       $ 11.64   $ 11.64              
Additional share-based compensation disclosures                                          
Total amount of consideration received from the exercised options         334,475 491,036                              
Compensation expense     40,178 18,186 165,384 115,809           59,789 89,100 182,069 278,531   100,000 75,000 300,000 225,000  
Shares surrendered in lieu of payment of withholding taxes (in shares) 37,796 39,700                                      
Average market price of shares surrendered in lieu of payment of withholding taxes (in dollars per share) $ 19.81 $ 16.93                                      
Unrecognized compensation expense $ 1,019,771                                        
Weighted average period of recognition of unrecognized compensation expense 1 year 2 months 5 days