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Note 19 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Results of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total interest income | $ 22,028,027 us-gaap_InterestIncomeOperating | $ 21,796,642 us-gaap_InterestIncomeOperating | $ 21,105,376 us-gaap_InterestIncomeOperating | $ 21,035,211 us-gaap_InterestIncomeOperating | $ 21,198,832 us-gaap_InterestIncomeOperating | $ 21,996,243 us-gaap_InterestIncomeOperating | $ 20,139,401 us-gaap_InterestIncomeOperating | $ 18,537,482 us-gaap_InterestIncomeOperating |  |  |
Total interest expense | 4,246,814 us-gaap_InterestExpense | 4,321,311 us-gaap_InterestExpense | 4,140,033 us-gaap_InterestExpense | 4,185,970 us-gaap_InterestExpense | 4,303,100 us-gaap_InterestExpense | 4,685,907 us-gaap_InterestExpense | 4,431,349 us-gaap_InterestExpense | 4,346,165 us-gaap_InterestExpense | 16,894,128 us-gaap_InterestExpense | 17,766,521 us-gaap_InterestExpense | 19,726,613 us-gaap_InterestExpense
Net interest income | 17,781,213 us-gaap_InterestIncomeExpenseNet | 17,475,331 us-gaap_InterestIncomeExpenseNet | 16,965,343 us-gaap_InterestIncomeExpenseNet | 16,849,241 us-gaap_InterestIncomeExpenseNet | 16,895,732 us-gaap_InterestIncomeExpenseNet | 17,310,336 us-gaap_InterestIncomeExpenseNet | 15,708,052 us-gaap_InterestIncomeExpenseNet | 14,191,317 us-gaap_InterestIncomeExpenseNet | 69,071,128 us-gaap_InterestIncomeExpenseNet | 64,105,437 us-gaap_InterestIncomeExpenseNet | 57,649,260 us-gaap_InterestIncomeExpenseNet
Provision for loan/lease losses | 3,647,636 us-gaap_ProvisionForLoanAndLeaseLosses | 1,063,323 us-gaap_ProvisionForLoanAndLeaseLosses | 1,001,879 us-gaap_ProvisionForLoanAndLeaseLosses | 1,094,162 us-gaap_ProvisionForLoanAndLeaseLosses | 1,985,517 us-gaap_ProvisionForLoanAndLeaseLosses | 1,366,984 us-gaap_ProvisionForLoanAndLeaseLosses | 1,520,137 us-gaap_ProvisionForLoanAndLeaseLosses | 1,057,782 us-gaap_ProvisionForLoanAndLeaseLosses | 6,807,000 us-gaap_ProvisionForLoanAndLeaseLosses | 5,930,420 us-gaap_ProvisionForLoanAndLeaseLosses | 4,370,767 us-gaap_ProvisionForLoanAndLeaseLosses
Noninterest income | 5,838,604 us-gaap_NoninterestIncome | 5,067,642 us-gaap_NoninterestIncome | 5,344,213 us-gaap_NoninterestIncome | 4,746,841 us-gaap_NoninterestIncome | 7,726,390 us-gaap_NoninterestIncome | 5,934,653 us-gaap_NoninterestIncome | 6,948,756 us-gaap_NoninterestIncome | 5,204,029 us-gaap_NoninterestIncome | 20,997,300 us-gaap_NoninterestIncome | 25,813,828 us-gaap_NoninterestIncome | 16,621,295 us-gaap_NoninterestIncome
Noninterest expense | 16,634,863 us-gaap_NoninterestExpense | 16,388,109 us-gaap_NoninterestExpense | 16,106,529 us-gaap_NoninterestExpense | 16,140,420 us-gaap_NoninterestExpense | 18,212,541 us-gaap_NoninterestExpense | 17,027,268 us-gaap_NoninterestExpense | 15,234,349 us-gaap_NoninterestExpense | 13,958,500 us-gaap_NoninterestExpense | 65,269,921 us-gaap_NoninterestExpense | 64,432,658 us-gaap_NoninterestExpense | 52,258,947 us-gaap_NoninterestExpense
Income before taxes | 3,337,318 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 5,091,541 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 5,201,148 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 4,361,500 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 4,424,064 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 4,850,737 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 5,902,322 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 4,379,064 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 17,991,507 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 19,556,187 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 17,640,841 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Federal and state income tax expense | 344,497 us-gaap_IncomeTaxExpenseBenefit | 1,028,876 us-gaap_IncomeTaxExpenseBenefit | 1,193,312 us-gaap_IncomeTaxExpenseBenefit | 472,285 us-gaap_IncomeTaxExpenseBenefit | 608,138 us-gaap_IncomeTaxExpenseBenefit | 1,038,793 us-gaap_IncomeTaxExpenseBenefit | 1,857,091 us-gaap_IncomeTaxExpenseBenefit | 1,113,920 us-gaap_IncomeTaxExpenseBenefit | 3,038,970 us-gaap_IncomeTaxExpenseBenefit | 4,617,942 us-gaap_IncomeTaxExpenseBenefit | 4,534,601 us-gaap_IncomeTaxExpenseBenefit
Net income | $ 2,992,821 us-gaap_NetIncomeLoss | $ 4,062,665 us-gaap_NetIncomeLoss | $ 4,007,836 us-gaap_NetIncomeLoss | $ 3,889,215 us-gaap_NetIncomeLoss | $ 3,815,926 us-gaap_NetIncomeLoss | $ 3,811,944 us-gaap_NetIncomeLoss | $ 4,045,231 us-gaap_NetIncomeLoss | $ 3,265,144 us-gaap_NetIncomeLoss | $ 14,952,537 us-gaap_NetIncomeLoss | $ 14,938,245 us-gaap_NetIncomeLoss | $ 12,617,767 us-gaap_NetIncomeLoss
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |
Basic (in Dollars per share) | $ 0.38 us-gaap_EarningsPerShareBasic | $ 0.51 us-gaap_EarningsPerShareBasic | $ 0.46 us-gaap_EarningsPerShareBasic | $ 0.40 us-gaap_EarningsPerShareBasic | $ 0.51 us-gaap_EarningsPerShareBasic | $ 0.52 us-gaap_EarningsPerShareBasic | $ 0.60 us-gaap_EarningsPerShareBasic | $ 0.50 us-gaap_EarningsPerShareBasic | $ 1.75 us-gaap_EarningsPerShareBasic | $ 2.13 us-gaap_EarningsPerShareBasic | $ 1.88 us-gaap_EarningsPerShareBasic
Diluted (in Dollars per share) | $ 0.37 us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted | $ 0.45 us-gaap_EarningsPerShareDiluted | $ 0.40 us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted | $ 0.51 us-gaap_EarningsPerShareDiluted | $ 0.59 us-gaap_EarningsPerShareDiluted | $ 0.49 us-gaap_EarningsPerShareDiluted | $ 1.72 us-gaap_EarningsPerShareDiluted | $ 2.08 us-gaap_EarningsPerShareDiluted | $ 1.85 us-gaap_EarningsPerShareDiluted

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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.23) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
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