Earnings per common share (Tables)

3 Months Ended

Mar. 31, 2019

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
	2019			2018
	(In thousands, except per share)
Income available to common shareholders:
Net income	$	482,742			352,610
Less: Preferred stock dividends (a)		(18,130	)		(18,130	)
Net income available to common equity		464,612			334,480
Less: Income attributable to unvested stock-based    compensation awards		(2,526	)		(1,732	)
Net income available to common shareholders	$	462,086			332,748
Weighted-average shares outstanding:
Common shares outstanding (including common stock    issuable) and unvested stock-based compensation awards		138,637			149,470
Less: Unvested stock-based compensation awards		(748	)		(782	)
Weighted-average shares outstanding		137,889			148,688
Basic earnings per common share	$	3.35			2.24

(a)Including impact of not as yet declared cumulative dividends.

Computations of Diluted Earnings Per Common Share

8. Earnings per common share, continued

The computations of diluted earnings per common share follow:

	Three Months Ended March 31
	2019			2018
	(In thousands, except per share)
Net income available to common equity	$	464,612			334,480
Less: Income attributable to unvested stock-based    compensation awards		(2,526	)		(1,731	)
Net income available to common shareholders	$	462,086			332,749
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		138,637			149,470
Less: Unvested stock-based compensation awards		(748	)		(782	)
Plus: Incremental shares from assumed conversion of    stock-based compensation awards and warrants to    purchase common stock		31			217
Adjusted weighted-average shares outstanding		137,920			148,905
Diluted earnings per common share	$	3.35			2.23