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Net income per common share (Tables)
6 Months Ended
Jun. 30, 2012
Schedule Of Earnings Per Share Basic And Diluted Table Text Block
  Quarter ended June 30,Six months ended June 30,
(In thousands, except per share information)2012201120122011
Net income$ 65,739$ 110,685$ 114,147$ 120,817
Preferred stock dividends  (930)  (931)  (1,861)  (1,861)
Net income applicable to common stock$ 64,809$ 109,754$ 112,286$ 118,956
Average common shares outstanding  102,295,113  102,122,591  102,318,459  102,138,020
Average potential dilutive common shares   115,505  67,023  161,071  116,300
Average common shares outstanding -         
 assuming dilution  102,410,618  102,189,614  102,479,530  102,254,320
Basic and dilutive EPS$ 0.63$ 1.07$ 1.10$ 1.16