Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2013 Credit Card Issuing Operations [Member]	Dec. 31, 2013 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]
Cash Flows from Operating Activities:
Net income	$ 14,938,245		$ 13,106,240		$ 10,129,869
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	2,695,578		2,350,303		2,442,896
Provision for loan/lease losses	5,930,420		4,370,767		6,616,014
Deferred income taxes	(1,021,991)		2,684,367		3,673,064
Stock-based compensation expense	792,279		849,760		696,407
Deferred compensation expense accrued	822,335		844,844		604,583
Losses on other real estate owned, net	545,340		1,332,972		374,910
Amortization of premiums on securities, net	3,574,097		3,946,551		3,487,361
Securities gains, net	(432,492)		(104,600)		(1,472,528)
Other-than-temporary impairment losses on securities			62,400		118,847
Loans originated for sale	(80,027,780)		(120,430,173)		(100,789,010)
Proceeds on sales of loans	86,231,767		122,143,407		113,606,152
Gains on sales of residential real estate loans, net	(836,065)		(1,388,142)		(999,162)
Gains on sales of government guaranteed portions of loans, net	(2,148,979)		(1,069,565)		(1,565,881)
Gain on sale of credit card loan receivables	(495,405)
Gain on sale of business	(2,334,216)						(355,268)
Prepayment fees on Federal Home Loan Bank advances					832,099
Increase in cash value of bank-owned life insurance	(1,786,023)		(1,609,208)		(1,445,891)
Decrease (increase) in other assets	7,650,490		771,424		(1,588,258)
Increase in other liabilities	1,017,133		2,793,570		1,918,804
Net cash provided by operating activities	32,036,253		30,654,917		36,640,276
Bargain purchase gain on Community National acquisition	(1,841,385)
Amortization of core deposit intangible	178,881
Accretion of acquisition fair value adjustments, net	(1,060,708)
Cash Flows from Investing Activities:
Net (increase) decrease in federal funds sold	(540,000)		(5,775,000)		41,175,000
Net (increase) decrease in interest-bearing deposits at financial institutions	(8,660,888)		4,391,112		12,995,009
Proceeds from sales of other real estate owned	1,345,479		5,241,265		9,220,631
Activity in securities portfolio:
Purchases	(312,970,498)		(474,461,164)		(622,245,920)
Calls, maturities and redemptions	147,264,900		374,292,050		422,870,000
Paydowns	46,098,773		39,956,569		9,094,080
Sales	37,393,047		19,215,075		54,326,191
Activity in restricted investment securities:
Purchases	(7,264,600)		(4,584,300)		(292,800)
Redemptions	7,244,200		4,090,050		1,707,900
Purchases of bank-owned life insurance			(2,000,000)		(7,000,000)
Net increase in loans/leases originated and held for investment	(55,311,462)		(91,275,511)		(56,096,989)
Purchase of premises and equipment	(2,430,353)		(1,871,942)		(3,064,903)
Proceeds from sale of credit card loan receivables	10,674,723
Net cash received from Community National Acquisition	3,025,073
Net cash paid on sales of certain branches of Community National Bank	(30,425,618)
Net cash used in investing activities	(164,557,224)		(132,781,796)		(137,311,801)
Cash Flows from Financing Activities:
Net increase in deposits	108,923,293		168,656,312		90,641,931
Net (decrease) increase in short-term borrowings	(21,789,994)		(42,453,489)		72,381,951
Activity in Federal Home Loan Bank advances:
Advances	77,000,000		13,000,000		5,000,000
Calls and maturities	(48,000,000)		(15,400,000)		(24,000,000)
Prepayments					(15,832,099)
Net (decrease) increase in other borrowings	(200,000)		8,099		(14,939,122)
Proceeds from other borrowings term note	10,000,000
Advance (payment) on 364-day revolving note	(5,600,000)		2,000,000		1,100,000
Repayment of Community National's other borrowings at acquisition	(3,950,000)
Payment of cash dividends on common and preferred stock	(4,062,726)		(4,088,949)		(3,712,493)
Repurchase of 521,888 shares of common stock warrants issued in conjunction with Series D Cumulative Perpetual Preferred Stock					(1,100,000)
Proceeds from issuance of stock								582,742	994,174	477,339
Purchase of noncontrolling interests			(1,934,532)
Net cash provided by financing activities	112,903,315		110,558,615		111,777,429
Net (decrease) increase in cash and due from banks	(19,617,656)		8,431,736		11,105,904
Cash and due from banks, beginning	61,568,446		53,136,710		42,030,806
Cash and due from banks, ending	41,950,790		61,568,446		53,136,710
Supplemental Disclosures of Cash Flow Information, cash payments for:
Interest	17,953,357		19,962,937		24,194,198
Income and franchise taxes	3,011,244		1,345,000		1,246,489
Supplemental Schedule of Noncash Investing Activities:
Change in accumulated other comprehensive income (loss), unrealized gains (losses) on on securities available for sale, net	(18,350,669)		(48,031)		4,050,549
Exchange of shares of common stock in connection with payroll taxes for restricted stock and options exercised	(434,545)		(10,415)		(19,651)
Transfers of loans to other real estate owned	7,115,008		2,143,017		9,446,588
Liability established for purchase of noncontrolling interest			2,847,687
Fair value of assets acquired:
Cash and due from banks *	9,286,757
Federal funds sold	12,335,000
Interest-bearing deposits at financial institutions	2,024,539
Securities available for sale	45,853,826
Loans/leases receivable held for investment, net	195,658,486
Premises and equipment, net	8,132,021
Core deposit intangible	3,440,076
Bank-owned life insurance	4,595,529
Restricted investment securities	1,259,375
Other real estate owned	550,326
Other assets	5,178,583
Total assets acquired	288,314,518
Fair value of liabilities assumed:
Deposits	255,045,071
Other borrowings	3,950,000
Junior subordinated debentures	4,125,175
Other liabilities	3,911,053
Total liabilities assumed	267,031,299
Net assets acquired	21,283,219
Consideration paid:
Cash paid *	6,261,684	[1]		[1]		[1]
Issuance of 834,715 shares of common stock	13,180,150
Total consideration paid	19,441,834
Bargain purchase gain	1,841,385
Assets sold:
Cash **	30,425,618	[2]		[2]		[2]
Loans receivable	54,458,870
Premises and equipment, net	2,373,822
Core deposit intangible	1,390,762
Other assets	138,899
Total assets sold	88,787,971
Liabilities sold:
Deposits	91,022,098
Other liabilities	100,089
Total liabilities sold	91,122,187
Gains on sales of certain branches of Community National Bank	$ 2,334,216						$ 355,268

[1] Net cash received at closing totaled $3,025,073

[2] Net cash paid at closing totaled $30,425,618