Earnings per common share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Computations of Basic Earnings Per Common Share

The computations of basic earnings per common share follow:

	Three Months Ended September 30						Nine Months Ended September 30
	2021			2020			2021			2020
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	495,460			372,136			1,400,778			882,012
Less: Preferred stock dividends		(17,050	)		(17,050	)		(51,150	)		(51,178	)
Net income available to common equity		478,410			355,086			1,349,628			830,834
Less: Income attributable to unvested stock-based    compensation awards		(2,452	)		(1,687	)		(6,823	)		(3,631	)
Net income available to common shareholders	$	475,958			353,399			1,342,805			827,203
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation    awards		129,580			129,061			129,529			129,518
Less: Unvested stock-based compensation awards		(891	)		(776	)		(897	)		(768	)
Weighted-average shares outstanding		128,689			128,285			128,632			128,750
Basic earnings per common share	$	3.70			2.75			10.44		$	6.42

Computations of Diluted Earnings Per Common Share

The computations of diluted earnings per common share follow:

	Three Months Ended September 30						Nine Months Ended September 30
	2021			2020			2021			2020
	(In thousands, except per share)
Net income available to common equity	$	478,410			355,086			1,349,628			830,834
Less: Income attributable to unvested stock-based    compensation awards		(2,449	)		(1,686	)		(6,816	)		(3,630	)
Net income available to common shareholders	$	475,961			353,400			1,342,812			827,204
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation    awards		129,580			129,061			129,529			129,518
Less: Unvested stock-based compensation awards		(891	)		(776	)		(897	)		(768	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		155			70			154			63
Adjusted weighted-average shares outstanding		128,844			128,355			128,786			128,813
Diluted earnings per common share	$	3.69			2.75			10.43		$	6.42