Earnings Per Common Share (Earnings Per Share Basic And Diluted) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share Reconciliation [Abstract]
Net income	$ 867,840	$ 644,283	$ 408,864
Less: Preferred stock dividends	16,650	15,919	7,875
Net income available to common shareholders, basic	851,190	628,364	400,989
Net income available to common shareholders, diluted	851,190	628,364	400,989
Less: Earnings applicable to participating securities, basic	7,922	5,672	2,302
Less: Earnings applicable to participating securities, diluted	7,922	5,672	2,302
Earnings applicable to common shareholders	843,268	622,692	398,687
Earnings applicable to common shareholders, diluted	$ 843,268	$ 622,692	$ 398,687
Earnings per common share:
Earnings per common share, Basic (in dollars per share)	$ 4.91	$ 3.72	$ 4.43
Earnings per common share, Diluted (in dollars per share)	$ 4.91	$ 3.72	$ 4.42
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding - basic	171,775	167,452	89,983
Stock options and restricted stock (in shares)	108	95	223
Weighted Average Number of Shares Outstanding, Diluted	171,883	167,547	90,206