Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 10,549,961	$ 9,184,965
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,020,975	896,952
Provision for loan/lease losses	2,539,839	2,105,109
Stock-based compensation expense	495,493	388,753
Deferred compensation expense accrued	511,502	404,723
Losses on other real estate owned, net	118,159
Amortization of premiums on securities, net	438,641	347,178
Loans originated for sale	(12,939,466)	(21,416,325)
Proceeds on sales of loans	13,763,966	22,547,789
Gains on sales of residential real estate loans	(100,815)	(96,323)
Gains on sales of government guaranteed portions of loans	(358,434)	(950,641)
Amortization of core deposit intangible	304,551	230,867
Accretion of acquisition fair value adjustments, net	(732,689)	(1,915,001)
Increase in cash value of bank-owned life insurance	(417,987)	(469,687)
Decrease (increase) in other assets	(4,403,592)	5,427,798
Decrease in other liabilities	(2,886,830)	(5,852,341)
Net cash provided by operating activities	7,903,274	10,833,816
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease in federal funds sold	15,692,000	6,459,000
Net decrease (increase) in interest-bearing deposits at financial institutions	10,713,457	(93,471,781)
Proceeds from sales of other real estate owned	736,370	34,191
Activity in securities portfolio:
Purchases	(7,100,109)	(12,138,040)
Calls, maturities and redemptions	4,540,000	17,385,968
Paydowns	9,085,377	8,486,628
Activity in restricted investment securities:
Purchases	(4,450,550)	(7,600)
Redemptions	1,820,000	1,315,500
Net increase in loans/leases originated and held for investment	(90,378,382)	(29,236,438)
Purchase of premises and equipment	(704,413)	(1,396,902)
Net cash used in investing activities	(60,046,250)	(102,569,474)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposit accounts	13,377,517	136,704,261
Net increase (decrease) in short-term borrowings	2,866,631	(20,501,291)
Activity in Federal Home Loan Bank advances:
Calls and maturities		(4,000,000)
Net change in short-term and overnight advances	24,345,000	(26,950,000)
Activity in other borrowings:
Calls, maturities and scheduled principal payments	(1,937,500)	(8,000,000)
Payment of cash dividends on common stock	(692,874)	(522,574)
Net cash provided by financing activities	38,267,301	77,491,634
Net decrease in cash and due from banks	(13,875,675)	(14,244,024)
Cash and due from banks, beginning	75,721,663	70,569,993
Cash and due from banks, ending	61,845,988	56,325,969
Supplemental disclosure of cash flow information, cash payments for:
Interest	3,654,713	3,747,218
Income/franchise taxes	74,604	4,842
Supplemental schedule of noncash investing activities:
Change in accumulated other comprehensive income, unrealized gains on securities available for sale and derivative instruments, net	(3,201,540)	410,739
Exchange of shares of common stock in connection with payroll taxes for restricted stock and in connection with stock options exercised	(177,923)	(290,290)
Transfers of loans to other real estate owned	46,244	136,450
Dividends payable	833,730	656,574
Increase in the fair value of interest rate swap assets and liabilities	103,080	303,383
Transfer of equity securities from securities available for sale to other assets at fair value	2,614,261
Common Stock Offering 2 [Member]
Activity in other borrowings:
Net proceeds from common stock offering	$ 308,527	$ 761,238