Earnings per common share (Tables)

6 Months Ended

Jun. 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 June 30						Six Months Ended June 30
	2021			2020			2021			2020
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	458,069			241,054			905,318			509,876
Less: Preferred stock dividends		(17,050	)		(17,050	)		(34,100	)		(34,128	)
Net income available to common equity		441,019			224,004			871,218			475,748
Less: Income attributable to unvested stock-based    compensation awards		(2,263	)		(906	)		(4,370	)		(1,954	)
Net income available to common shareholders	$	438,756			223,098			866,848			473,794
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation    awards		129,589			129,059			129,502			129,750
Less: Unvested stock-based compensation awards		(918	)		(784	)		(898	)		(764	)
Weighted-average shares outstanding		128,671			128,275			128,604			128,986
Basic earnings per common share	$	3.41			1.74			6.74			3.67

Computations of Diluted Earnings Per Common Share

The computations of diluted earnings per common share follow:

	Three Months Ended June 30						Six Months Ended June 30
	2021			2020			2021			2020
	(In thousands, except per share)
Net income available to common equity	$	441,019			224,004			871,218			475,748
Less: Income attributable to unvested stock-based    compensation awards		(2,260	)		(905	)		(4,366	)		(1,953	)
Net income available to common shareholders	$	438,759			223,099			866,852			473,795
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation    awards		129,589			129,059			129,502			129,750
Less: Unvested stock-based compensation awards		(918	)		(784	)		(898	)		(764	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		171			58			152			58
Adjusted weighted-average shares outstanding		128,842			128,333			128,756			129,044
Diluted earnings per common share	$	3.41			1.74			6.73			3.67