Earnings Per Common Share - Computations of Basic Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income available to common shareholders:
Net income	$ 701,624	$ 362,174
Less: Preferred stock dividends	(24,941)	(21,765)
Net income available to common equity	676,683	340,409
Less: Income attributable to unvested stock-based compensation awards	(1,175)	(820)
Net income available to common shareholders	$ 675,508	$ 339,589
Weighted-average shares outstanding:
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards	168,010	129,274
Less: Unvested stock-based compensation awards	(278)	(329)
Weighted-average shares outstanding	167,732	128,945
Basic earnings per common share	$ 4.03	$ 2.63