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Summary of Significant Accounting Policies - Basic and Diluted Income (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Accounting Policies [Abstract]    
Net income (loss) attributable to common stock $ (138,440) $ 29,956
Income allocable to unvested restricted shares 0 (37)
Basic income (loss) attributable to common stock (138,440) 29,919
Diluted income (loss) attributable to common stock $ (138,440) $ 41,991
Basic income (loss) attributable to common stock (in shares) 231,377 188,916
Effect of Dilutive Securities, Convertible preferred stock $ 0 $ 12,072
Effect of Dilutive Securities, Convertible preferred stock (in shares) 0 96,250
Diluted income (loss) attributable to common stock (in shares) 231,377 285,166
Basic income (loss) attributable to common stock (in dollars per share) $ (0.60) $ 0.16
Diluted income (loss) attributable to common stock (in dollars per share) $ (0.60) $ 0.15