Earnings Per Share - Antidilutive Securities Excluded from Computation of EPS (Details) - $ / shares shares in Thousands |
12 Months Ended | |||
---|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Convertible Notes due 2021 [Member] | Senior notes [Member] | ||||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Debt instrument, convertible, conversion price (in dollars per share) | $ 9.33 | |||
Stock options and restricted stock awards [Member] | ||||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Weighted-average antidilutive securities excluded from computation of EPS (in shares) | 5,312 | 1,495 | 7,419 | |
Convertible notes [Member] | Convertible Notes due 2017 [Member] | ||||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Weighted-average antidilutive securities excluded from computation of EPS (in shares) | 0 | 0 | 5,702 |