Share Based Compensation - Schedule of Activity Related to Stock Options Awards, Restricted Stock Awards and Director Plan Restricted Stock Awards (Details) |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2019
$ / shares
shares
|
Dec. 31, 2018
$ / shares
shares
|
Dec. 31, 2017
$ / shares
shares
|
|
| Stock Options | |||
| Avg wtd grant-date fair value | |||
| Outstanding at beginning of period | $ 3.79 | $ 3.66 | $ 3.40 |
| Granted | 7.25 | 6.51 | 6.14 |
| Forfeited | 5.01 | 6.39 | 3.02 |
| Exercised | 3.19 | 3.01 | 2.54 |
| Modified to liability to be cash settled | 2.61 | ||
| Outstanding at end of the period | 3.83 | 3.79 | 3.66 |
| Vested | 3.61 | 3.35 | 3.17 |
| Unvested | 5.10 | 5.00 | 4.49 |
| Avg wtd exercise price | |||
| Outstanding at beginning of period | 6.12 | 5.71 | 4.90 |
| Granted | 17.64 | 14.25 | 13.52 |
| Forfeited | 9.68 | 14.00 | 3.81 |
| Exercised | 4.24 | 3.56 | 2.45 |
| Modified to liability to be cash settled | 2.62 | ||
| Outstanding at end of the period | 6.27 | 6.12 | 5.71 |
| Vested | 5.59 | 4.76 | 4.19 |
| Unvested | $ 10.25 | $ 9.88 | $ 8.31 |
| Units | |||
| Outstanding at beginning of period | shares | 9,070,052 | 9,078,728 | 8,669,475 |
| Total number of options granted | shares | 31,178 | 359,618 | 774,357 |
| Forfeited | shares | (274,774) | (16,791) | (132,972) |
| Exercised | shares | (946,289) | (351,503) | (73,406) |
| Modified to liability to be cash settled | shares | (158,726) | ||
| Outstanding at end of the period | shares | 7,880,167 | 9,070,052 | 9,078,728 |
| Vested | shares | 6,724,030 | 6,653,228 | 5,731,647 |
| Unvested | shares | 1,156,137 | 2,416,824 | 3,347,081 |
| Restricted Shares | |||
| Avg wtd grant-date fair value | |||
| Unvested at beginning of period | $ 13.17 | $ 11.82 | $ 9.48 |
| Granted | 16.27 | 13.77 | 13.52 |
| Vested | 12.83 | 10.42 | 7.99 |
| Forfeited | 13.42 | 14.27 | 8.81 |
| Unvested at end of period | $ 14.29 | $ 13.17 | $ 11.82 |
| Units | |||
| Unvested at beginning of period | shares | 2,997,856 | 1,293,107 | 1,018,228 |
| Granted | shares | 1,196,820 | 1,924,691 | 623,165 |
| Vested | shares | (521,701) | (217,630) | (339,701) |
| Forfeited | shares | (457,356) | (2,312) | (8,585) |
| Unvested at end of period | shares | 3,215,619 | 2,997,856 | 1,293,107 |
| Restricted Shares | Director Plan | |||
| Avg wtd grant-date fair value | |||
| Unvested at beginning of period | $ 5.71 | $ 5.71 | |
| Vested | 5.71 | ||
| Unvested at end of period | $ 5.71 | ||
| Units | |||
| Unvested at beginning of period | shares | 49,230 | ||
| Vested | shares | (49,230) | ||