Quarterly report pursuant to Section 13 or 15(d)

Quarterly Results of Operations (Unaudited) (Details)

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Quarterly Results of Operations (Unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Selected Quarterly Financial Information [Abstract]    
Interest income $ 465,319 $ 479,937
Interest Expense 41,149 62,728
Net interest income 424,170 417,209
Provision for credit losses 29,592 34,406
Noninterest Income 252,209 285,320
Noninterest Expense 442,793 462,676
Income before income taxes 203,994 205,447
Provision for income taxes 52,214 52,177
Net income 151,780 153,270
Dividends on preferred shares 7,970 8,049
Net income applicable to common shareholders $ 143,810 $ 145,221
Earnings Per Share, Basic $ 0.17 $ 0.17
Earnings Per Share, Diluted $ 0.17 $ 0.17