Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Cash and due from banks	$ 85,522,685	$ 75,721,663
Federal funds sold	26,398,000	30,197,000
Interest-bearing deposits at financial institutions	133,198,095	55,765,012
Securities held to maturity, at amortized cost	401,912,885	379,474,205
Securities available for sale, at fair value	261,056,448	272,907,907
Total securities	662,969,333	652,382,112
Loans receivable held for sale	1,295,400	645,001
Loans/leases receivable held for investment	3,731,458,642	2,963,840,399
Gross loans/leases receivable	3,732,754,042	2,964,485,400
Less allowance for estimated losses on loans/leases	(39,847,108)	(34,355,728)
Net loans/leases receivable	3,692,906,934	2,930,129,672
Bank-owned life insurance	67,783,126	59,059,494
Premises and equipment, net	75,582,118	62,838,255
Restricted investment securities	25,688,775	19,782,525
Other real estate owned, net	9,377,735	13,558,308
Goodwill	77,831,902	28,334,092
Intangibles	17,450,182	9,078,953
Other assets	75,001,310	45,817,687
Total assets	4,949,710,195	3,982,664,773
Liabilities and Stockholders' Equity
Noninterest-bearing	791,101,467	789,547,696
Interest-bearing	3,185,929,107	2,477,107,360
Total deposits	3,977,030,574	3,266,655,056
Short-term borrowings	28,774,157	13,993,122
Federal Home Loan Bank advances	266,492,039	192,000,000
Other borrowings	72,032,318	66,000,000
Junior subordinated debentures	37,670,043	37,486,487
Other liabilities	94,572,661	53,242,979
Total liabilities	4,476,571,792	3,629,377,644
Stockholders' Equity:
Preferred stock, $1 par value; shares authorized 250,000 December 2018 and December 2017- No shares issued or outstanding
Common stock, $1 par value; shares authorized 20,000,000 December 2018 - 15,718,208 shares issued and outstanding December 2017 - 13,918,168 shares issued and outstanding	15,718,208	13,918,168
Additional paid-in capital	270,760,511	189,077,550
Retained earnings	192,203,333	151,962,661
Accumulated other comprehensive loss:
Securities available for sale	(4,267,461)	(866,223)
Derivatives	(1,276,188)	(805,027)
Total stockholders' equity	473,138,403	353,287,129
Total liabilities and stockholders' equity	$ 4,949,710,195	$ 3,982,664,773