Earnings Per Common Share (Earnings Per Share Basic And Diluted) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share Reconciliation [Abstract]
Net income	$ 182,311	$ 94,035	$ 165,564	$ 202,113
Less: Preferred stock dividends	4,163	1,969	7,594	3,938
Earnings applicable to common shareholders	178,148	92,066	157,970	198,175
Net income available to common shareholders	178,148	92,066	157,970	198,175
Less: (Loss) earnings allocated to participating securities, basic	1,718	511	1,456	1,090
Less: (Loss) earnings allocated to participating securities, diluted	1,718	511	1,456	1,090
Earnings applicable to common shareholders	176,430	91,555	156,514	197,085
Earnings applicable to common shareholders	$ 176,430	$ 91,555	$ 156,514	$ 197,085
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding - basic (in shares)	175,845	90,027	161,698	89,918
Effect of dilutive securities (in shares)	50	194	87	246
Weighted-average common shares outstanding - diluted (in shares)	175,895	90,221	161,785	90,164
Earnings Per Share, Basic and Diluted [Abstract]
Basic (loss) earnings per common share (in dollars per share)	$ 1.00	$ 1.02	$ 0.97	$ 2.19
Diluted (loss) earnings per common share (in shares)	$ 1.00	$ 1.01	$ 0.97	$ 2.19