Earnings per common share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Computations of Basic Earnings Per Common Share

The computations of basic earnings per common share follow:

	Year Ended December 31
	2022			2021			2020
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	1,991,663		$	1,858,746		$	1,353,152
Less: Preferred stock dividends		(96,587	)		(72,915	)		(68,228	)
Net income available to common equity		1,895,076			1,785,831			1,284,924
Less: Income attributable to unvested stock-based    compensation awards		(3,607	)		(8,854	)		(5,858	)
Net income available to common shareholders	$	1,891,469		$	1,776,977		$	1,279,066
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation awards		163,489			129,539			129,404
Less: Unvested stock-based compensation awards		(315	)		(890	)		(766	)
Weighted-average shares outstanding		163,174			128,649			128,638
Basic earnings per common share	$	11.59		$	13.81		$	9.94

Computations of Diluted Earnings Per Common Share

The computations of diluted earnings per common share follow:

	Year Ended December 31
	2022			2021			2020
	(In thousands, except per share)
Net income available to common equity	$	1,895,076		$	1,785,831		$	1,284,924
Less: Income attributable to unvested stock-based    compensation awards		(3,596	)		(8,844	)		(5,856	)
Net income available to common shareholders	$	1,891,480		$	1,776,987		$	1,279,068
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		163,489			129,539			129,404
Less: Unvested stock-based compensation awards		(315	)		(890	)		(766	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		856			163			66
Adjusted weighted-average shares outstanding		164,030			128,812			128,704
Diluted earnings per common share	$	11.53		$	13.80		$	9.94