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Earnings (Loss) per Share - Calculation of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Numerator:    
Numerator for basic EPS - Net income (loss) $ 18,234 $ (285,865)
Effect of dilutive securities:    
Interest expense associated with convertible debt instruments (1,567) 0
Numerator for diluted EPS - net income (loss) available to common stockholders after the effect of dilutive securities $ 16,667 $ (285,865)
Denominator:    
Denominator for basic EPS - weighted average number of shares of common stock outstanding (in shares) 102,840 94,089
Effect of dilutive securities:    
Convertible debt instruments (in shares) 699 0
Dilutive potential common shares (in shares) 3,842 0
Denominator for diluted EPS - adjusted weighted-average number of shares of common stock outstanding after the effect of dilutive securities (in shares) 106,682 94,089
Earnings (loss) per share:    
Basic (in usd per share) $ 0.18 $ (3.04)
Diluted (in usd per share) $ 0.16 $ (3.04)
Employee stock options    
Effect of dilutive securities:    
Incremental common shares attributable to dilutive effect of share-based payment award (in shares) 15 0
Restricted stock units    
Effect of dilutive securities:    
Incremental common shares attributable to dilutive effect of share-based payment award (in shares) 3,128 0