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Note 25 - Quarterly Results of Operations (Unaudited) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information [Text Block] | Note 25 – Quarterly Results of Operations (unaudited) The following table reports quarterly results of operations (unaudited) for 2015, 2014 and 2013:
|  | 2015 |
(dollars in thousands except per share data) |  | Fourth Quarter |  |  | Third Quarter |  |  | Second Quarter |  |  | First Quarter |
Total interest income |  | $ | 67,311 |  |  | $ | 63,981 |  |  | $ | 62,423 |  |  | $ | 59,465 |
Total interest expense |  |  | 4,735 |  |  |  | 4,896 |  |  |  | 4,873 |  |  |  | 4,734 |
Net interest income |  |  | 62,576 |  |  |  | 59,085 |  |  |  | 57,550 |  |  |  | 54,731 |
Provision for credit losses |  |  | 4,595 |  |  |  | 3,262 |  |  |  | 3,471 |  |  |  | 3,310 |
Net interest income after provision for credit losses |  |  | 57,981 |  |  |  | 55,823 |  |  |  | 54,079 |  |  |  | 51,421 |
Noninterest income |  |  | 6,492 |  |  |  | 6,099 |  |  |  | 6,233 |  |  |  | 7,804 |
Noninterest expense |  |  | 28,640 |  |  |  | 27,405 |  |  |  | 26,598 |  |  |  | 28,073 |
Income before income tax expense |  |  | 35,833 |  |  |  | 34,517 |  |  |  | 33,714 |  |  |  | 31,152 |
Income tax expense |  |  | 13,485 |  |  |  | 13,054 |  |  |  | 12,776 |  |  |  | 11,734 |
Net income |  |  | 22,348 |  |  |  | 21,463 |  |  |  | 20,938 |  |  |  | 19,418 |
Preferred stock dividends and discount accretion |  |  | 62 |  |  |  | 180 |  |  |  | 179 |  |  |  | 180 |
Net income available to common shareholders |  | $ | 22,286 |  |  | $ | 21,283 |  |  | $ | 20,759 |  |  | $ | 19,238 |
Earnings per common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (1) |  | $ | 0.67 |  |  | $ | 0.64 |  |  | $ | 0.62 |  |  | $ | 0.62 |
Diluted (1) |  | $ | 0.65 |  |  | $ | 0.63 |  |  | $ | 0.61 |  |  | $ | 0.61 |
|  | 2014 |
(dollars in thousands except per share data) |  | Fourth Quarter |  |  | Third Quarter |  |  | Second Quarter |  |  | First Quarter |
Total interest income |  | $ | 56,091 |  |  | $ | 47,886 |  |  | $ | 44,759 |  |  | $ | 42,837 |
Total interest expense |  |  | 4,275 |  |  |  | 3,251 |  |  |  | 2,739 |  |  |  | 2,830 |
Net interest income |  |  | 51,816 |  |  |  | 44,635 |  |  |  | 42,020 |  |  |  | 40,007 |
Provision for credit losses |  |  | 3,700 |  |  |  | 2,111 |  |  |  | 3,134 |  |  |  | 1,934 |
Net interest income after provision for credit losses |  |  | 48,116 |  |  |  | 42,524 |  |  |  | 38,886 |  |  |  | 38,073 |
Noninterest income |  |  | 5,310 |  |  |  | 4,761 |  |  |  | 3,811 |  |  |  | 4,463 |
Noninterest expense |  |  | 29,352 |  |  |  | 25,143 |  |  |  | 22,135 |  |  |  | 23,098 |
Income before income tax expense |  |  | 24,074 |  |  |  | 22,142 |  |  |  | 20,562 |  |  |  | 19,438 |
Income tax expense |  |  | 9,347 |  |  |  | 8,054 |  |  |  | 7,618 |  |  |  | 6,939 |
Net income |  |  | 14,727 |  |  |  | 14,088 |  |  |  | 12,944 |  |  |  | 12,499 |
Preferred stock dividends and discount accretion |  |  | 180 |  |  |  | 151 |  |  |  | 142 |  |  |  | 141 |
Net income available to common shareholders |  | $ | 14,547 |  |  | $ | 13,937 |  |  | $ | 12,802 |  |  | $ | 12,358 |
Earnings per common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (1) |  | $ | 0.51 |  |  | $ | 0.54 |  |  | $ | 0.49 |  |  | $ | 0.48 |
Diluted (1) |  | $ | 0.49 |  |  | $ | 0.52 |  |  | $ | 0.48 |  |  | $ | 0.47 |
|  | 2013 |
(dollars in thousands except per share data) |  | Fourth Quarter |  |  | Third Quarter |  |  | Second Quarter |  |  | First Quarter |
Total interest income |  | $ | 41,652 |  |  | $ | 39,724 |  |  | $ | 37,985 |  |  | $ | 37,933 |
Total interest expense |  |  | 2,938 |  |  |  | 3,021 |  |  |  | 3,121 |  |  |  | 3,424 |
Net interest income |  |  | 38,714 |  |  |  | 36,703 |  |  |  | 34,864 |  |  |  | 34,509 |
Provision for credit losses |  |  | 2,508 |  |  |  | 1,372 |  |  |  | 2,357 |  |  |  | 3,365 |
Net interest income after provision for credit losses |  |  | 36,206 |  |  |  | 35,331 |  |  |  | 32,507 |  |  |  | 31,144 |
Noninterest income |  |  | 4,304 |  |  |  | 5,236 |  |  |  | 7,065 |  |  |  | 8,111 |
Noninterest expense |  |  | 21,524 |  |  |  | 21,673 |  |  |  | 20,685 |  |  |  | 20,697 |
Income before income tax expense |  |  | 18,986 |  |  |  | 18,894 |  |  |  | 18,887 |  |  |  | 18,558 |
Income tax expense |  |  | 6,983 |  |  |  | 7,137 |  |  |  | 7,212 |  |  |  | 6,986 |
Net income |  |  | 12,003 |  |  |  | 11,757 |  |  |  | 11,675 |  |  |  | 11,572 |
Preferred stock dividends and discount accretion |  |  | 141 |  |  |  | 142 |  |  |  | 142 |  |  |  | 141 |
Net income available to common shareholders |  | $ | 11,862 |  |  | $ | 11,615 |  |  | $ | 11,533 |  |  | $ | 11,431 |
Earnings per common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (1 & 2) |  | $ | 0.46 |  |  | $ | 0.45 |  |  | $ | 0.45 |  |  | $ | 0.45 |
Diluted (1 & 2) |  | $ | 0.45 |  |  | $ | 0.44 |  |  | $ | 0.44 |  |  | $ | 0.44 |
(1) Earnings per common share are calculated on a quarterly basis and may not be additive to the year to date amount.
(2) Per share amounts have been adjusted to give effect to the 10% common stock dividend paid on June 14, 2013.

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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=51655806&loc=d3e765-108305 Reference 2: 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=51825399&loc=d3e1280-108306 Reference 3: 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=51655806&loc=d3e725-108305 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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