Earnings Per Common Share - Computations of Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income available to common equity	$ 676,683	$ 340,409
Less: Income attributable to unvested stock-based compensation awards	(1,172)	(819)
Net income available to common shareholders	$ 675,511	$ 339,590
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards	168,010	129,274
Less: Unvested stock-based compensation awards	(278)	(329)
Plus: Incremental shares from assumed conversion of stock-based compensation awards and warrants to purchase common stock	678	471
Adjusted weighted-average shares outstanding	168,410	129,416
Diluted earnings per common share	$ 4.01	$ 2.62