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Quarterly Results of Operations (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Summary of Quarterly Consolidated Results of Operations | The following is a summary of the quarterly consolidated results of operations:
|  | Three Months Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | 2018 |  |  | 2018 |  |  | 2018 |  |  | 2018 |
Interest income |  | $ | 39,426 |  |  | $ | 40,741 |  |  | $ | 42,271 |  |  | $ | 43,730 |
Interest expense |  |  | 6,015 |  |  |  | 7,191 |  |  |  | 8,499 |  |  |  | 9,894 |
Net interest income |  |  | 33,411 |  |  |  | 33,550 |  |  |  | 33,772 |  |  |  | 33,836 |
Provision for loan losses |  |  | 567 |  |  |  | 635 |  |  |  | 1,176 |  |  |  | 528 |
Gain (loss) on sale of securities |  |  | 11 |  |  |  | — |  |  |  | (122 | ) |  |  | (332 | )
Net income |  | $ | 12,804 |  |  | $ | 14,115 |  |  | $ | 13,065 |  |  | $ | 13,133 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.33 |  |  | $ | 0.37 |  |  | $ | 0.34 |  |  | $ | 0.35 |
Diluted |  |  | 0.33 |  |  |  | 0.37 |  |  |  | 0.34 |  |  |  | 0.34 |
Average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 38,306,395 |  |  |  | 38,347,612 |  |  |  | 38,365,379 |  |  |  | 38,367,972 |
Diluted |  |  | 38,468,810 |  |  |  | 38,519,401 |  |  |  | 38,534,970 |  |  |  | 38,488,861 |
|  | Three Months Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | 2017 |  |  | 2017 |  |  | 2017 |  |  | 2017 |
Interest income |  | $ | 28,834 |  |  | $ | 30,805 |  |  | $ | 32,070 |  |  | $ | 36,774 |
Interest expense |  |  | 3,266 |  |  |  | 3,607 |  |  |  | 4,191 |  |  |  | 5,319 |
Net interest income |  |  | 25,568 |  |  |  | 27,198 |  |  |  | 27,879 |  |  |  | 31,455 |
Provision for loan losses |  |  | 330 |  |  |  | 330 |  |  |  | 710 |  |  |  | 1,100 |
Gain on sale of securities |  |  | 35 |  |  |  | (3 | ) |  |  | 6 |  |  |  | — |
Net income |  | $ | 8,224 |  |  | $ | 9,072 |  |  | $ | 8,171 |  |  | $ | 7,650 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.25 |  |  | $ | 0.27 |  |  | $ | 0.24 |  |  | $ | 0.20 |
Diluted |  |  | 0.25 |  |  |  | 0.27 |  |  |  | 0.24 |  |  |  | 0.20 |
Average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 33,263,289 |  |  |  | 33,264,697 |  |  |  | 33,870,240 |  |  |  | 37,711,200 |
Diluted |  |  | 33,489,106 |  |  |  | 33,483,584 |  |  |  | 34,072,909 |  |  |  | 37,893,014 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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