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Segment Reporting | 9 Months Ended
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Sep. 30, 2013
Segment Reporting [Abstract] |
Segment Reporting | SEGMENT REPORTING The Company has two primary operating segments, Banking and Wealth Management, which are delineated by the products and services that each segment offers. The segments are evaluated separately on their individual performance, as well as their contribution to the Company as a whole. The Banking operating segment consists of a full-service commercial bank, with locations in St. Louis, Kansas City, and Phoenix. The majority of the Company’s assets and income result from the Banking segment. All banking locations have the same product and service offerings, have similar types and classes of customers and utilize similar service delivery methods. Pricing guidelines and operating policies for products and services are the same across all regions. The Banking operating segment also includes activities surrounding the assets acquired under FDIC loss share agreements. The Wealth Management operating segment includes the Trust division of the Bank and the state tax credit brokerage activities. The Trust division provides estate planning, investment management, and retirement planning as well as strategic planning and management succession issues. State tax credits are part of a fee initiative designed to augment the Company’s Wealth Management segment and Banking lines of business. The Company's Corporate and Intercompany activities represent the elimination of items between segments as well as Corporate related items that management feels are not allocable to either of the two respective segments. The financial information for each business segment reflects that information which is specifically identifiable or which is allocated based on an internal allocation method. There were no material intersegment revenues among the two segments. Management periodically makes changes to methods of assigning costs and income to its business segments to better reflect operating results. When appropriate, these changes are reflected in prior year information presented below. Following are the financial results for the Company’s operating segments.
(in thousands) | Banking |  | Wealth Management |  | Corporate and Intercompany |  | Total
| Three months ended September 30,
Income Statement Information | 2013
Net interest income (expense) | $ | 33,476 |  |  | $ | (166 | ) |  | $ | (736 | ) |  | $ | 32,574 |
Provision for loan losses | 2,159 |  |  | — |  |  | — |  |  | 2,159 |
Noninterest income | 1,684 |  |  | 2,006 |  |  | 26 |  |  | 3,716 |
Noninterest expense | 17,898 |  |  | 1,809 |  |  | 1,533 |  |  | 21,240 |
Income (loss) before income tax expense (benefit) | 15,103 |  |  | 31 |  |  | (2,243 | ) |  | 12,891 |
| 2012
Net interest income (expense) | $ | 38,627 |  |  | $ | (252 | ) |  | $ | (891 | ) |  | $ | 37,484 |
Provision for loan losses | 11,937 |  |  | — |  |  | — |  |  | 11,937 |
Noninterest income | 5,418 |  |  | 2,088 |  |  | 326 |  |  | 7,832 |
Noninterest expense | 18,063 |  |  | 1,968 |  |  | 1,251 |  |  | 21,282 |
Income (loss) before income tax expense (benefit) | 14,045 |  |  | (132 | ) |  | (1,816 | ) |  | 12,097 |
| Nine months ended September 30,
Income Statement Information | 2013
Net interest income (expense) | $ | 105,738 |  |  | $ | (292 | ) |  | $ | (2,665 | ) |  | $ | 102,781 |
Provision for loan losses | (305 | ) |  | — |  |  | — |  |  | (305 | )
Noninterest income | (1,758 | ) |  | 6,611 |  |  | 100 |  |  | 4,953 |
Noninterest expense | 53,137 |  |  | 5,644 |  |  | 4,355 |  |  | 63,136 |
Income (loss) before income tax expense (benefit) | 51,148 |  |  | 675 |  |  | (6,920 | ) |  | 44,903 |
| 2012
Net interest income (expense) | $ | 105,646 |  |  | $ | (566 | ) |  | $ | (2,834 | ) |  | $ | 102,246 |
Provision for loan losses | 16,221 |  |  | — |  |  | — |  |  | 16,221 |
Noninterest income | 5,571 |  |  | 6,718 |  |  | 371 |  |  | 12,660 |
Noninterest expense | 54,424 |  |  | 5,761 |  |  | 3,875 |  |  | 64,060 |
Income (loss) before income tax expense (benefit) | 40,572 |  |  | 391 |  |  | (6,338 | ) |  | 34,625 |
Balance Sheet Information | September 30, 2013 |  | December 31, 2012
Total assets: |  |  |
Banking | $ | 2,994,008 |  |  | $ | 3,195,096 |
Wealth Management | 96,943 |  |  | 112,020 |
Corporate and Intercompany | 17,111 |  |  | 18,670 |
Total | 3,108,062 |  |  | 3,325,786 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599 + Details
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