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Stockholders' Equity - Breakdown of Options Outstanding (Details) | 12 Months Ended
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Dec. 31, 2018 $ / shares shares
$8.58 – $195.91 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | $ 8.58
Upper range of exercise prices (USD per share) | $ 195.91
Options outstanding (shares) | shares | 1,734,304
Weighted average remaining life in years | 5 years 5 months 19 days
Weighted average exercise price (USD per share) | $ 66.71
Options exercisable (shares) | shares | 1,313,374
Weighted average exercise price (USD per share) | $ 47.03
$8.58 - $10.05 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 8.58
Upper range of exercise prices (USD per share) | $ 10.05
Options outstanding (shares) | shares | 184,702
Weighted average remaining life in years | 1 year 10 months 13 days
Weighted average exercise price (USD per share) | $ 10.00
Options exercisable (shares) | shares | 184,702
Weighted average exercise price (USD per share) | $ 10.00
$10.12 - $12.81 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 10.12
Upper range of exercise prices (USD per share) | $ 12.81
Options outstanding (shares) | shares | 46,510
Weighted average remaining life in years | 2 years 11 months 1 day
Weighted average exercise price (USD per share) | $ 11.40
Options exercisable (shares) | shares | 46,510
Weighted average exercise price (USD per share) | $ 11.40
$14.47 - $14.47 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 14.47
Upper range of exercise prices (USD per share) | $ 14.47
Options outstanding (shares) | shares | 217,616
Weighted average remaining life in years | 3 years 1 month 9 days
Weighted average exercise price (USD per share) | $ 14.47
Options exercisable (shares) | shares | 203,616
Weighted average exercise price (USD per share) | $ 14.47
$16.14 - $17.88 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 16.14
Upper range of exercise prices (USD per share) | $ 17.88
Options outstanding (shares) | shares | 38,790
Weighted average remaining life in years | 2 months 1 day
Weighted average exercise price (USD per share) | $ 16.36
Options exercisable (shares) | shares | 38,790
Weighted average exercise price (USD per share) | $ 16.36
$21.92 - $21.92 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 21.92
Upper range of exercise prices (USD per share) | $ 21.92
Options outstanding (shares) | shares | 200,372
Weighted average remaining life in years | 4 years 1 month 17 days
Weighted average exercise price (USD per share) | $ 21.92
Options exercisable (shares) | shares | 200,372
Weighted average exercise price (USD per share) | $ 21.92
$32.00 - $56.26 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 32.00
Upper range of exercise prices (USD per share) | $ 56.26
Options outstanding (shares) | shares | 182,767
Weighted average remaining life in years | 5 years 8 months 12 days
Weighted average exercise price (USD per share) | $ 50.38
Options exercisable (shares) | shares | 174,470
Weighted average exercise price (USD per share) | $ 50.10
$63.58 - $67.53 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 63.58
Upper range of exercise prices (USD per share) | $ 67.53
Options outstanding (shares) | shares | 20,434
Weighted average remaining life in years | 5 years 5 months 8 days
Weighted average exercise price (USD per share) | $ 67.42
Options exercisable (shares) | shares | 20,153
Weighted average exercise price (USD per share) | $ 67.47
$74.42 - $74.42 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 74.42
Upper range of exercise prices (USD per share) | $ 74.42
Options outstanding (shares) | shares | 190,825
Weighted average remaining life in years | 5 years 1 month 13 days
Weighted average exercise price (USD per share) | $ 74.42
Options exercisable (shares) | shares | 190,825
Weighted average exercise price (USD per share) | $ 74.42
$85.79 - $100.38 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 85.79
Upper range of exercise prices (USD per share) | $ 100.38
Options outstanding (shares) | shares | 299,282
Weighted average remaining life in years | 7 years 6 months 25 days
Weighted average exercise price (USD per share) | $ 93.32
Options exercisable (shares) | shares | 157,872
Weighted average exercise price (USD per share) | $ 91.62
$101.15 - $195.91 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise prices (USD per share) | 101.15
Upper range of exercise prices (USD per share) | $ 195.91
Options outstanding (shares) | shares | 353,006
Weighted average remaining life in years | 8 years 9 months 14 days
Weighted average exercise price (USD per share) | $ 148.50
Options exercisable (shares) | shares | 96,064
Weighted average exercise price (USD per share) | $ 131.77

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