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Business Segments (Financial Information For Segments Of The Corporation) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2012 | Mar. 31, 2011 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |
Interest income | $ 107,287 | $ 97,371 |
Interest expense | 16,366 | 20,088 |
Net interest income | 90,921 | 77,283 |
Provision for loan losses | 6,572 | 8,228 |
Non-interest income | 31,745 | 28,432 |
Non-interest expense | 84,392 | 72,761 |
Intangible amortization | 2,281 | 1,796 |
Income tax expense (benefit) | 7,839 | 5,755 |
Net income (loss) | 21,582 | 17,175 |
Total assets | 11,726,063 | 9,755,281 | 9,786,483
Total intangibles | 714,176 | 601,475 |
Number of reportable segments | 4 |  |
Community Banking [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest income | 97,427 | 87,783 |
Interest expense | 12,824 | 16,394 |
Net interest income | 84,603 | 71,389 |
Provision for loan losses | 5,238 | 6,836 |
Non-interest income | 23,447 | 20,081 |
Non-interest expense | 71,793 | 60,057 |
Intangible amortization | 2,095 | 1,606 |
Income tax expense (benefit) | 7,734 | 5,836 |
Net income (loss) | 21,190 | 17,135 |
Total assets | 11,534,775 | 9,553,213 |
Total intangibles | 689,570 | 576,112 |
Wealth Management [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest income | 2 | 3 |
Net interest income | 2 | 3 |
Non-interest income | 5,882 | 5,938 |
Non-interest expense | 4,689 | 4,933 |
Intangible amortization | 80 | 84 |
Income tax expense (benefit) | 403 | 333 |
Net income (loss) | 712 | 591 |
Total assets | 19,212 | 19,518 |
Total intangibles | 11,552 | 11,883 |
Insurance [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest income | 30 | 33 |
Net interest income | 30 | 33 |
Non-interest income | 3,503 | 3,558 |
Non-interest expense | 2,937 | 3,291 |
Intangible amortization | 106 | 106 |
Income tax expense (benefit) | 174 | 70 |
Net income (loss) | 316 | 124 |
Total assets | 16,951 | 18,718 |
Total intangibles | 11,245 | 11,671 |
Consumer Finance [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest income | 8,356 | 8,070 |
Interest expense | 971 | 1,117 |
Net interest income | 7,385 | 6,953 |
Provision for loan losses | 1,166 | 1,328 |
Non-interest income | 497 | 522 |
Non-interest expense | 4,605 | 4,324 |
Income tax expense (benefit) | 808 | 683 |
Net income (loss) | 1,303 | 1,140 |
Total assets | 167,758 | 168,643 |
Total intangibles | 1,809 | 1,809 |
Parent And Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest income | 1,472 | 1,482 |
Interest expense | 2,571 | 2,577 |
Net interest income | (1,099) | (1,095) |
Provision for loan losses | 168 | 64 |
Non-interest income | (1,584) | (1,667) |
Non-interest expense | 368 | 156 |
Income tax expense (benefit) | (1,280) | (1,167) |
Net income (loss) | (1,939) | (1,815) |
Total assets | $ (12,633) | $ (4,811) |

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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 9, 51, 54 -IssueDate 2006-05-01 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 9 -Section 04 -Paragraph 1, 2 , 3, 4, 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-5) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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