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Selected Quarterly Results (Notes) | 12 Months Ended
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Dec. 31, 2013
Selected Quarterly Results [Abstract] |
Quarterly Financial Information [Text Block] | SELECTED QUARTERLY INFORMATION (UNAUDITED)
| Year Ended December 31, 2013
| First Quarter | Second Quarter | Third Quarter | Fourth Quarter
Operating results: |  |  |  |
Net interest income | $ | 22,526 |  | $ | 22,444 |  | $ | 22,948 |  | $ | 20,186 |
Net interest income after provision for loan losses | 22,265 |  | 22,444 |  | 22,948 |  | 20,186 |
Net income to common shareholders | 18,381 |  | 29,442 |  | (6,921 | ) | 19,266 |
Comprehensive income (loss) to common shareholders | 27,427 |  | (67,215 | ) | (6,184 | ) | 19,813 |
Basic net income per common share | $ | 0.34 |  | $ | 0.54 |  | $ | (0.13 | ) | $ | 0.35 |
Diluted net income per common share | $ | 0.34 |  | $ | 0.54 |  | $ | (0.13 | ) | $ | 0.35 |
Cash dividends declared per common share | $ | 0.29 |  | $ | 0.29 |  | $ | 0.27 |  | $ | 0.27 |
| Year Ended December 31, 2012
| First Quarter | Second Quarter | Third Quarter | Fourth Quarter
Operating results: |  |  |  |
Net interest income | $ | 19,147 |  | $ | 19,008 |  | $ | 19,100 |  | $ | 21,145 |
Net interest income after provision for loan losses | 19,087 |  | 19,008 |  | 18,990 |  | 21,123 |
Net income to common shareholders | 16,476 |  | 18,847 |  | 18,353 |  | 18,330 |
Comprehensive income to common shareholders | 42,655 |  | 17,429 |  | 52,737 |  | 14,951 |
Basic net income per common share | $ | 0.33 |  | $ | 0.35 |  | $ | 0.34 |  | $ | 0.34 |
Diluted net income per common share | $ | 0.33 |  | $ | 0.35 |  | $ | 0.34 |  | $ | 0.34 |
Cash dividends declared per common share | $ | 0.28 |  | $ | 0.29 |  | $ | 0.29 |  | $ | 0.29 |
| Year Ended December 31, 2011
| First Quarter | Second Quarter | Third Quarter | Fourth Quarter
Operating results: |  |  |  |
Net interest income | $ | 12,731 |  | $ | 15,033 |  | $ | 14,559 |  | $ | 16,972 |
Net interest income after provision for loan losses | 12,481 |  | 14,833 |  | 14,259 |  | 16,851 |
Net income to common shareholders | 10,280 |  | 13,594 |  | 1,532 |  | 14,406 |
Comprehensive income (loss) to common shareholders | 6,606 |  | 13,910 |  | (6,772 | ) | 12,756 |
Basic net income per common share | $ | 0.31 |  | $ | 0.34 |  | $ | 0.04 |  | $ | 0.36 |
Diluted net income per common share | $ | 0.31 |  | $ | 0.34 |  | $ | 0.04 |  | $ | 0.36 |
Cash dividends declared per common share | $ | 0.27 |  | $ | 0.27 |  | $ | 0.27 |  | $ | 0.28 |

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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