Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plan - Stock Options Outstanding (Details)

v2.4.0.8
Stock Incentive Plan - Stock Options Outstanding (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Outstanding Options - Number Outstanding (in shares) 4,573,378
Exercisable Options - Number Exercisable (in shares) 3,067,015
2000 Plan | Exercise Price $2.750
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 2.750
Outstanding Options - Number Outstanding (in shares) 324,231
Outstanding Options - Weighted-Average Remaining Term 5 months 27 days
Outstanding Options - Weighted-Average Exercise Price $ 2.750
Exercisable Options - Number Exercisable (in shares) 324,231
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 2.750
2000 Plan | Exercise Price $3.000
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 3.000
Outstanding Options - Number Outstanding (in shares) 13,600
Outstanding Options - Weighted-Average Remaining Term 1 year 26 days
Outstanding Options - Weighted-Average Exercise Price $ 3.000
Exercisable Options - Number Exercisable (in shares) 13,600
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 3.000
2000 Plan | Exercise Price $3.250
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 3.250
Outstanding Options - Number Outstanding (in shares) 580,044
Outstanding Options - Weighted-Average Remaining Term 2 years 2 months 9 days
Outstanding Options - Weighted-Average Exercise Price $ 3.250
Exercisable Options - Number Exercisable (in shares) 580,044
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 3.250
2000 Plan | Exercise Price $3.410
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 3.410
Outstanding Options - Number Outstanding (in shares) 442,462
Outstanding Options - Weighted-Average Remaining Term 3 years 18 days
Outstanding Options - Weighted-Average Exercise Price $ 3.410
Exercisable Options - Number Exercisable (in shares) 442,462
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 3.410
2000 Plan | Exercise Price $4.220
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 4.220
Outstanding Options - Number Outstanding (in shares) 210,050
Outstanding Options - Weighted-Average Remaining Term 3 years 7 months 28 days
Outstanding Options - Weighted-Average Exercise Price $ 4.220
Exercisable Options - Number Exercisable (in shares) 210,050
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 4.220
2000 Plan | Exercise Price $6.055
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 6.055
Outstanding Options - Number Outstanding (in shares) 966,400
Outstanding Options - Weighted-Average Remaining Term 5 years 6 months
Outstanding Options - Weighted-Average Exercise Price $ 6.055
Exercisable Options - Number Exercisable (in shares) 839,100
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 6.055
2000 Plan | Exercise Price $13.045
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 13.045
Outstanding Options - Number Outstanding (in shares) 558,000
Outstanding Options - Weighted-Average Remaining Term 6 years 3 months 26 days
Outstanding Options - Weighted-Average Exercise Price $ 13.045
Exercisable Options - Number Exercisable (in shares) 414,100
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 13.045
2010 Plan | Exercise Price $7.150
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 7.150
Outstanding Options - Number Outstanding (in shares) 30,000
Outstanding Options - Weighted-Average Remaining Term 9 years 3 months 22 days
Outstanding Options - Weighted-Average Exercise Price $ 7.150
Exercisable Options - Number Exercisable (in shares) 0
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 7.150
2010 Plan | Exercise Price $8.390
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 8.390
Outstanding Options - Number Outstanding (in shares) 50,000
Outstanding Options - Weighted-Average Remaining Term 9 years 4 months 28 days
Outstanding Options - Weighted-Average Exercise Price $ 8.390
Exercisable Options - Number Exercisable (in shares) 0
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 8.390
2010 Plan | Exercise Price $8.480
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 8.480
Outstanding Options - Number Outstanding (in shares) 100,000
Outstanding Options - Weighted-Average Remaining Term 9 years 8 months 9 days
Outstanding Options - Weighted-Average Exercise Price $ 8.480
Exercisable Options - Number Exercisable (in shares) 0
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 8.480
2010 Plan | Exercise Price $8.860
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 8.860
Outstanding Options - Number Outstanding (in shares) 24,360
Outstanding Options - Weighted-Average Remaining Term 9 years 5 months 9 days
Outstanding Options - Weighted-Average Exercise Price $ 8.860
Exercisable Options - Number Exercisable (in shares) 0
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 8.860
2010 Plan | Exercise Price $9.450
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 9.450
Outstanding Options - Number Outstanding (in shares) 374,000
Outstanding Options - Weighted-Average Remaining Term 9 years 6 months 22 days
Outstanding Options - Weighted-Average Exercise Price $ 9.450
Exercisable Options - Number Exercisable (in shares) 0
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 9.450
2010 Plan | Exercise Price $10.690
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 10.690
Outstanding Options - Number Outstanding (in shares) 20,000
Outstanding Options - Weighted-Average Remaining Term 9 years 9 months 22 days
Outstanding Options - Weighted-Average Exercise Price $ 10.690
Exercisable Options - Number Exercisable (in shares) 0
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 10.690
2010 Plan | Exercise Price $10.750
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 10.750
Outstanding Options - Number Outstanding (in shares) 50,000
Outstanding Options - Weighted-Average Remaining Term 8 years 4 months 28 days
Outstanding Options - Weighted-Average Exercise Price $ 10.750
Exercisable Options - Number Exercisable (in shares) 10,000
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 10.750
2010 Plan | Exercise Price $10.950
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 10.950
Outstanding Options - Number Outstanding (in shares) 140,000
Outstanding Options - Weighted-Average Remaining Term 7 years 8 months 16 days
Outstanding Options - Weighted-Average Exercise Price $ 10.950
Exercisable Options - Number Exercisable (in shares) 72,000
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 10.950
2010 Plan | Exercise Price $11.630
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 11.630
Outstanding Options - Number Outstanding (in shares) 155,093
Outstanding Options - Weighted-Average Remaining Term 8 years 5 months 16 days
Outstanding Options - Weighted-Average Exercise Price $ 11.630
Exercisable Options - Number Exercisable (in shares) 36,028
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 11.630
2010 Plan | Exercise Price $11.980
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 11.980
Outstanding Options - Number Outstanding (in shares) 446,450
Outstanding Options - Weighted-Average Remaining Term 8 years 3 months 26 days
Outstanding Options - Weighted-Average Exercise Price $ 11.980
Exercisable Options - Number Exercisable (in shares) 89,930
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 11.980
2010 Plan | Exercise Price $14.810
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 14.810
Outstanding Options - Number Outstanding (in shares) 60,000
Outstanding Options - Weighted-Average Remaining Term 7 years 4 months 24 days
Outstanding Options - Weighted-Average Exercise Price $ 14.810
Exercisable Options - Number Exercisable (in shares) 24,000
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 14.810
2010 Plan | Exercise Price $16.290
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Exercise Price $ 16.290
Outstanding Options - Number Outstanding (in shares) 28,688
Outstanding Options - Weighted-Average Remaining Term 7 years 26 days
Outstanding Options - Weighted-Average Exercise Price $ 16.290
Exercisable Options - Number Exercisable (in shares) 11,470
Exercisable Options - Weighted-Average Exercise Price (in dollars per share) $ 16.290