|
Equity Compensation (Details) (Stock options, USD $)
|
12 Months Ended |
0 Months Ended |
|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Jan. 01, 2015
|
Aug. 07, 2013
|
| Shares Subject to Options Outstanding |
|
|
|
|
| Balance at the beginning of the period (in shares) |
4,905,214 |
4,649,238 |
|
|
| Granted (in shares) |
1,592,268 |
480,698 |
|
|
| Exercised (in shares) |
(1,512,514) |
(107,042) |
|
|
| Expired (in shares) |
(136) |
(27,772) |
|
|
| Forfeited (in shares) |
(133,611) |
(89,908) |
|
|
| Balance at the end of the period (in shares) |
4,851,221 |
4,905,214 |
|
|
| Exercisable options (in shares) |
2,494,711 |
3,285,695 |
|
|
| Vested and expected to vest at the end of the period (in shares) |
4,615,485 |
4,544,942 |
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|
| Weighted Average Grant Date Fair Value |
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|
|
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| Granted (in dollars per share) |
$ 9.99 |
$ 10.08 |
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|
| Weighted Average Exercise Price |
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|
|
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| Balance at the beginning of the period (in dollars per share) |
$ 6.31 |
$ 5.56 |
|
|
| Granted (in dollars per share) |
$ 18.00 |
$ 13.20 |
|
|
| Exercised (in dollars per share) |
$ 4.24 |
$ 4.17 |
|
|
| Expired (in dollars per share) |
$ 7.40 |
$ 5.79 |
|
|
| Forfeited (in dollars per share) |
$ 13.77 |
$ 7.14 |
|
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| Balance at the end of the period (in dollars per share) |
$ 10.57 |
$ 6.31 |
|
|
| Exercisable options at the end of the period (in dollars per share) |
$ 6.33 |
$ 4.88 |
|
|
| Vested and expected to vest (in dollars per share) |
$ 10.30 |
$ 6.15 |
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|
| Weighted-Average Remaining Contractual Life |
|
|
|
|
| Exercisable options |
5 years 7 months 6 days |
4 years 10 months 24 days |
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| Vested and expected to vest |
7 years |
5 years 10 months 24 days |
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|
2013 Plan
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| Stock options |
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| Annual increase in shares authorized for issuance as a percentage of shares outstanding as of the preceding December 31 |
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|
|
5.00% |
| Increase in number of shares authorized for issuance |
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|
1,215,269 |
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