Earnings Per Share (Details) - USD ($) shares in Millions, $ in Millions |
3 Months Ended | ||
---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Jun. 15, 2018 |
|
Unvested Restricted Stock | |||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
Antidilutive securities (shares) | 7.2 | 7.0 | |
Convertible Debt Securities | |||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
Antidilutive securities (shares) | 13.8 | ||
Warrant | |||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
Antidilutive securities (shares) | 10.8 | ||
Convertible Senior Notes Due June 2018 | Convertible notes payable | |||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
Principal | $ 316.3 | ||
Interest rate | 2.75% | ||
Maximum number of convertible instruments (shares) | 3.0 |