Earnings per common share (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Computations of Basic Earnings Per Common Share

The computations of basic earnings per common share follow:

	Three Months Ended March 31
	2022			2021
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	362,174		$	447,249
Less: Preferred stock dividends		(21,765	)		(17,050	)
Net income available to common equity		340,409			430,199
Less: Income attributable to unvested stock-based    compensation awards		(820	)		(2,108	)
Net income available to common shareholders	$	339,589		$	428,091
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation    awards		129,274			129,414
Less: Unvested stock-based compensation awards		(329	)		(877	)
Weighted-average shares outstanding		128,945			128,537
Basic earnings per common share	$	2.63		$	3.33

Computations of Diluted Earnings Per Common Share

The computations of diluted earnings per common share follow:

	Three Months Ended March 31
	2022			2021
	(In thousands, except per share)
Net income available to common equity	$	340,409		$	430,199
Less: Income attributable to unvested stock-based    compensation awards		(819	)		(2,106	)
Net income available to common shareholders	$	339,590		$	428,093
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation    awards		129,274			129,414
Less: Unvested stock-based compensation awards		(329	)		(877	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		471			132
Adjusted weighted-average shares outstanding		129,416			128,669
Diluted earnings per common share	$	2.62		$	3.33