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Earnings Per Share - Calculation of Basic Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Basic earnings (loss) per share:        
Net income (loss) available to common stockholders $ 19,381 $ (3,529) $ 61,794 $ 71,950
Basic weighted-average shares of common stock outstanding 363,244 346,060 360,629 341,940
Basic earnings (loss) per share $ 0.05 $ (0.01) $ 0.17 $ 0.21