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Quarterly Results of Operation (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2012
Quarterly Result of Operations (Unaudited) [Abstract] |
Summary of the quarterly consolidated results of operations |
Three Months Ended 2012 |  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
Interest income |  | $ | 16,826 |  |  | $ | 16,523 |  |  | $ | 18,719 |  |  | $ | 20,460 |
Interest expense |  |  | 3,628 |  |  |  | 3,517 |  |  |  | 3,720 |  |  |  | 3,457 |
Net interest income |  |  | 13,198 |  |  |  | 13,006 |  |  |  | 14,999 |  |  |  | 17,003 |
Provision for loan losses |  |  | 559 |  |  |  | 209 |  |  |  | 1,041 |  |  |  | 1,715 |
Gain (loss) on sale of securities |  |  | — |  |  |  | — |  |  |  | 2 |  |  |  | — |
Net income |  |  | 4,613 |  |  |  | 4,910 |  |  |  | 4,850 |  |  |  | 5,170 |
Net income available to common shareholders |  | $ | 4,457 |  |  | $ | 4,804 |  |  | $ | 4,787 |  |  | $ | 5,014 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.60 |  |  | $ | 0.65 |  |  | $ | 0.56 |  |  | $ | 0.58 |
Diluted |  |  | 0.59 |  |  |  | 0.62 |  |  |  | 0.54 |  |  |  | 0.56 |
Average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 7,422,860 |  |  |  | 7,434,537 |  |  |  | 8,503,475 |  |  |  | 8,617,466 |
Diluted |  |  | 7,598,490 |  |  |  | 7,728,519 |  |  |  | 8,838,659 |  |  |  | 8,964,315 |
Three Months Ended 2011 |  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
Interest income |  | $ | 15,431 |  |  | $ | 15,712 |  |  | $ | 16,011 |  |  | $ | 17,460 |
Interest expense |  |  | 4,364 |  |  |  | 4,249 |  |  |  | 4,020 |  |  |  | 3,868 |
Net interest income |  |  | 11,067 |  |  |  | 11,463 |  |  |  | 11,991 |  |  |  | 13,592 |
Provision for loan losses |  |  | 1,548 |  |  |  | 1,332 |  |  |  | 1,564 |  |  |  | 838 |
Gain (loss) on sale of securities |  |  | 274 |  |  |  | 365 |  |  |  | 1,115 |  |  |  | 23 |
Net income |  |  | 2,765 |  |  |  | 3,093 |  |  |  | 3,417 |  |  |  | 3,522 |
Net income available to common shareholders |  | $ | 2,489 |  |  | $ | 2,816 |  |  | $ | 2,707 |  |  | $ | 3,460 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.34 |  |  | $ | 0.38 |  |  | $ | 0.37 |  |  | $ | 0.47 |
Diluted |  |  | 0.33 |  |  |  | 0.37 |  |  |  | 0.36 |  |  |  | 0.46 |
Average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 7,387,072 |  |  |  | 7,406,624 |  |  |  | 7,414,043 |  |  |  | 7,421,544 |
Diluted |  |  | 7,612,144 |  |  |  | 7,598,180 |  |  |  | 7,596,570 |  |  |  | 7,576,052 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: 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=20225539&loc=d3e1280-108306 + Details
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