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Loans and Asset Quality Information (Details 6) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011
Impaired loans at period end | $ 152,731 | $ 149,845 | $ 140,976
Average amount of impaired loans for period | 143,172 | 160,289 | 152,312
Impaired loans with related allowance - Related Allowance | 16,209 | 10,746 | 10,910
Impaired loans with no related allowance - Recorded Investment | 62,848 | 81,269 | 79,423
Non-covered |  |  |
Impaired loans at period end | 94,602 | 88,463 | 85,286
Average amount of impaired loans for period | 86,723 | 91,187 | 89,023
Impaired loans with related allowance - Related Allowance | 11,051 | 6,019 | 5,804
Impaired loans with no related allowance - Recorded Investment | 22,235 | 31,514 | 35,721
Covered |  |  |
Impaired loans at period end | 58,129 | 61,382 | 55,690
Average amount of impaired loans for period | 56,449 | 69,102 | 63,289
Impaired loans with related allowance - Related Allowance | 5,158 | 4,727 | 5,106
Impaired loans with no related allowance - Recorded Investment | $ 40,613 | $ 49,755 | $ 43,702

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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 + Details
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