Earnings Per Share - Basic and Diluted Components (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Numerator: | |||||||||||
| Net loss attributable to common shareholders | $ (16,860) | $ (15,578) | $ (25,881) | $ (19,848) | $ (19,451) | $ (41,008) | $ (42,645) | $ (27,074) | $ (78,167) | $ (130,178) | $ (57,591) |
| Denominator: | |||||||||||
| Weighted average number of common shares outstanding | 218,882,337 | 216,343,985 | 180,619,860 | ||||||||