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Commitments and contingencies (Tables)
3 Months Ended
Mar. 31, 2012
Schedule Of Fair Value Off Balance Sheet Risks Text Block
(In thousands)March 31, 2012December 31, 2011March 31, 2011
Commitments to extend credit:      
 Credit card lines$ 4,361,641$4,297,755$3,864,026
 Commercial lines of credit  2,092,520 2,039,629 2,471,756
 Other unused credit commitments   367,672 358,572 373,832
Commercial letters of credit  11,700 11,632 13,297
Standby letters of credit  131,785 124,709 133,178
Commitments to originate mortgage loans  66,908 53,323 40,002