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Note 20 - Parent Company Only Financial Statements - Condensed Statements of Income (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Total interest income | $ 37,878,086 | $ 33,840,865 | $ 32,453,268 | $ 31,345,099 | $ 32,235,657 | $ 26,816,735 | $ 23,913,284 | $ 23,502,059 |  |  |
Securities gains |  |  |  |  |  |  |  |  | $ (87,885) | $ 4,592,398 | $ 798,983
Total revenue |  |  |  |  |  |  |  |  | 165,999,610 | 137,502,624 | 114,366,574
Total interest expense | 6,084,733 | 5,284,517 | 4,406,571 | 3,676,216 | 2,955,992 | 3,185,958 | 2,904,471 | 2,904,537 | 19,452,037 | 11,950,958 | 13,706,529
Salaries and employee benefits |  |  |  |  |  |  |  |  | 55,722,288 | 46,317,060 | 42,967,915
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  | 1,068,918 | 1,400,004 |
Post-acquisition compensation, transition and integration costs |  |  |  |  |  |  |  |  | 4,309,565 | 1,041,169 |
Losses on debt extinguishment, net |  |  |  |  |  |  |  |  |  | 4,577,668 | 7,185,601
Income tax benefit | 2,000,105 | (1,921,533) | (2,635,576) | (2,389,446) | (2,872,412) | (1,858,208) | (2,153,144) | (2,019,023) | (4,946,450) | (8,902,787) | (3,669,242)
Net income (loss) | $ 9,901,590 | $ 7,853,935 | $ 8,766,017 | $ 9,184,965 | $ 8,529,330 | $ 6,107,501 | $ 6,676,467 | $ 6,373,489 | 35,706,507 | 27,686,787 | 16,927,881
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Total interest income |  |  |  |  |  |  |  |  | 12,802 | 74,489 | 69,774
Securities gains |  |  |  |  |  |  |  |  | 6,312 | 37,596 | 262,801
Other |  |  |  |  |  |  |  |  | 2,700 | (2,933) | (4,436)
Total revenue |  |  |  |  |  |  |  |  | 45,200,751 | 33,609,538 | 22,420,047
Total interest expense |  |  |  |  |  |  |  |  | 2,658,414 | 1,735,769 | 1,679,909
Salaries and employee benefits |  |  |  |  |  |  |  |  | 5,021,998 | 4,607,887 | 4,847,507
Professional fees |  |  |  |  |  |  |  |  | 1,344,721 | 949,442 | 1,121,094
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  | 1,068,918 | 1,400,004 |
Post-acquisition compensation, transition and integration costs |  |  |  |  |  |  |  |  | 3,151,384 | 313,598 |
Losses on debt extinguishment, net |  |  |  |  |  |  |  |  |  | (1,200,000) | (300,000)
Other |  |  |  |  |  |  |  |  | 1,134,139 | 988,057 | 949,041
Total expenses |  |  |  |  |  |  |  |  | 14,379,574 | 8,794,757 | 8,297,551
Income before income tax benefit |  |  |  |  |  |  |  |  | 30,821,177 | 24,814,781 | 14,122,496
Income tax benefit |  |  |  |  |  |  |  |  | 4,885,330 | 2,872,006 | 2,805,385
Net income (loss) |  |  |  |  |  |  |  |  | 35,706,507 | 27,686,787 | 16,927,881
Parent Company [Member] | Bank Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Equity in net income of bank subsidiaries |  |  |  |  |  |  |  |  | 45,103,593 | 33,467,712 | 22,059,086
Parent Company [Member] | Non-bank Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Equity in net income of bank subsidiaries |  |  |  |  |  |  |  |  | $ 75,344 | $ 32,674 | $ 32,823

X
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs. + References No definition available. + Details
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- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(f)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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