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Basis Of Presentation (Effect On Consolidated Condensed Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2011 | Jun. 30, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Dec. 31, 2009
--- | --- | --- | --- | --- | --- | ---
Allowance for loan losses | $ 107,310 | $ 120,174 | $ 143,575 | $ 117,405 | $ 120,676 | $ 116,717
Net loans | 4,573,265 |  | 4,589,110 |  |  |
Other assets | 163,973 |  | 148,852 |  |  |
Total assets | 7,095,098 |  | 7,282,261 | 7,090,456 |  |
Retained earnings | 430,121 |  | 406,342 |  |  |
Total stockholders' equity | 755,053 |  | 729,708 |  |  |
Total liabilities and stockholders' equity | 7,095,098 |  | 7,282,261 |  |  |
As Previously Reported [Member] |  |  |  |  |  |
Allowance for loan losses | 100,248 |  |  |  |  |
Net loans | 4,580,327 |  |  |  |  |
Other assets | 161,501 |  |  |  |  |
Total assets | 7,099,688 |  |  |  |  |
Retained earnings | 434,711 |  | 422,458 |  |  |
Total stockholders' equity | 759,643 |  |  |  |  |
Total liabilities and stockholders' equity | 7,099,688 |  |  |  |  |
Effect Of Change [Member] |  |  |  |  |  |
Allowance for loan losses | 7,062 |  |  |  |  |
Net loans | (7,062) |  |  |  |  |
Other assets | 2,472 |  |  |  |  |
Total assets | (4,590) |  |  |  |  |
Retained earnings | (4,590) |  | (16,116) |  |  |
Total stockholders' equity | (4,590) |  |  |  |  |
Total liabilities and stockholders' equity | $ (4,590) |  |  |  |  |

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