Earnings per common share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings per common share (Tables) [Abstract]

Computations of basic earnings per common share

	Three months ended						Six months ended
	June 30						June 30
	2011			2010			2011			2010
	(in thousands, except per share)
Income available to common shareholders:
Net income	$	322,358			188,749			528,631			339,704
Less: Preferred stock dividends (a)		(7,184	)		(10,056	)		(17,682	)		(20,113	)
Amortization of preferred stock discount (a)		(13,531	)		(2,605	)		(16,284	)		(5,162	)
Net income available to common equity		301,643			176,088			494,665			314,429
Less: Income attributable to unvested stock-based compensation awards		(4,479	)		(2,500	)		(7,382	)		(4,403	)
Net income available to common shareholders	$	297,164			173,588			487,283			310,026
Weighted-average shares outstanding:
Common shares outstanding (including common stock issuable) and unvested stock-based compensation awards		124,035			119,756			122,522			119,550
Less: Unvested stock-based compensation awards		(1,854	)		(1,702	)		(1,823	)		(1,640	)
Weighted-average shares outstanding		122,181			118,054			120,699			117,910
Basic earnings per common share	$	2.43			1.47			4.04			2.63

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

Computations of diluted earnings per common share

	Three months ended						Six months ended
	June 30						June 30
	2011			2010			2011			2010
				(in thousands, except per share)
Net income available to common equity	$	301,643			176,088			494,665			314,429
Less: Income attributable to unvested stock-based compensation awards		(4,464	)		(2,491	)		(7,357	)		(4,392	)
Net income available to common shareholders	$	297,179			173,597			487,308			310,037
Adjusted weighted-average shares outstanding:
Common and unvested stock-based compensation awards		124,035			119,756			122,522			119,550
Less: Unvested stock-based compensation awards		(1,854	)		(1,702	)		(1,823	)		(1,640	)
Plus: Incremental shares from assumed conversion of stock-based compensation awards and convertible preferred stock		615			824			633			659
Adjusted weighted-average shares outstanding		122,796			118,878			121,332			118,569
Diluted earnings per common share	$	2.42			1.46			4.02			2.61