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Derivatives Financial Instruments (Summary Amounts Included In Consolidated Statement Of Income Related To Derivatives) (Details) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Interest Rate Swaps and Floors [Member] | Other Income [Member]
       
Income related to derivative instruments not designated in hedge relationships $ (94) $ (227) $ (628) $ (303)
Mortgage Banking Derivatives [Member] | Mortgage Banking Revenue [Member]
       
Income related to derivative instruments not designated in hedge relationships (165) (6,458) (1,508) (8,601)
Covered Call Options [Member] | Other Expense [Member]
       
Income related to derivative instruments not designated in hedge relationships $ 2,287 $ 169 $ 4,757 $ 459