Net Income (Loss) Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Earnings Per Share [Abstract] |
|
|
|
|
| Net income (loss) |
$ 14,402
|
$ (65,145)
|
$ (4,390)
|
$ (73,783)
|
| Less: Net income attributable to participating securities |
(109)
|
0
|
0
|
0
|
| Net income (loss) attributable to common stockholders |
$ 14,293
|
$ (65,145)
|
$ (4,390)
|
$ (73,783)
|
| Denominator (basic): |
|
|
|
|
| Weighted average number of shares outstanding, basic (in shares) |
92,034,474
|
95,340,136
|
93,052,376
|
94,659,931
|
| Denominator (diluted): |
|
|
|
|
| Weighted average number of shares outstanding, basic (in shares) |
92,034,474
|
95,340,136
|
93,052,376
|
94,659,931
|
| Dilutive stock options outstanding (in shares) |
3,716,283
|
0
|
0
|
0
|
| Dilutive restricted stock units and awards (in shares) |
1,557,016
|
0
|
0
|
0
|
| Dilutive shares purchased under ESPP (in shares) |
13,530
|
0
|
0
|
0
|
| Net weighted average common shares, diluted (in shares) |
97,321,303
|
95,340,136
|
93,052,376
|
94,659,931
|
| Earnings per share, basic (in dollars per share) |
$ 0.16
|
$ (0.68)
|
$ (0.05)
|
$ (0.78)
|
| Earnings per share, diluted (in dollars per share) |
$ 0.15
|
$ (0.68)
|
$ (0.05)
|
$ (0.78)
|