Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

v2.4.0.6
Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Basic earnings per common share:    
Net income $ 153,270 $ 126,446
Preferred stock dividends, deemed dividend and accretion of discount (8,049) (7,703)
Net income applicable to common shareholders 145,221 118,743
Average common shares issued and outstanding 864,499 863,359
Basic earnings per common share $ 0.17 $ 0.14
Diluted earnings per common share    
Net income applicable to common shareholders 145,221 118,743
Effect of assumed preferred stock conversion 8,049 7,703
Net income applicable to diluted earnings per share $ 145,221 $ 118,743
Average common shares issued and outstanding 864,499 863,359
Dilutive potential common shares:    
Stock options and restricted stock units 3,463,000 2,996,000
Shares held in deferred compensation plans 1,202,000 882,000
Dilutive potential common shares: 4,665,000 3,878,000
Total diluted average common shares issued and outstanding 869,164 867,237
Diluted earnings (loss) per common share $ 0.17 $ 0.14
Earnings Loss Per Share (Textuals) [Abstract]    
Weighted average exercise price options $ 12.38 $ 20.71
Stock Options [Member]
    
Earnings Loss Per Share (Textuals) [Abstract]    
Options outstanding to purchase common stock shares having antidilutive effect 22,900,000 14,700,000