Note 8 - Fair Value (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

			Fair Value Measurements at Reporting Date Using
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2013:
Securities available for sale:
U.S. govt. sponsored agency securities	$	367,524,887	$	-	$	367,524,887	$	-
Residential mortgage-backed and related securities		166,544,470		-		166,544,470		-
Municipal securities		36,459,170		-		36,459,170		-
Other securities		1,808,802		285,214		1,523,588		-
	$	572,337,329	$	285,214	$	572,052,115	$	-
December 31, 2012:
Securities available for sale:
U.S. govt. sponsored agency securities	$	338,609,371	$	-	$	338,609,371	$	-
Residential mortgage-backed and related securities		163,601,103		-		163,601,103		-
Municipal securities		26,185,736		-		26,185,736		-
Trust preferred securities		139,400		-		139,400		-
Other securities		1,624,376		234,453		1,389,923		-
	$	530,159,986	$	234,453	$	529,925,533	$	-

			Fair Value Measurements at Reporting Date Using
	Fair Value		Level 1		Level 2		Level 3
September 30, 2013:
Impaired loans/leases	$	11,239,694	$	-	$	-	$	11,239,694
Other real estate owned		9,175,463		-		-		9,175,463
	$	20,415,157	$	-	$	-	$	20,415,157
December 31, 2012:
Impaired loans/leases	$	18,054,234	$	-	$	-	$	18,054,234
Other real estate owned		4,270,901		-		-		4,270,901
	$	22,325,135	$	-	$	-	$	22,325,135

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

	Quantitave Information about Level Fair Value Measurments
	Fair Value		Valuation Technique	Unobservable Input	Range
September 30, 2013:
Impaired loans/leases	$	11,239,694	Appraisal of collateral	Appraisal adjustments		-10.00%	to	-40.00%
Other real estate owned		9,175,463	Appraisal of collateral	Appraisal adjustments		-25.00%	to	-50.00%

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Fair Value	As of September 30, 2013				As of December 31, 2012
	Hierarchy Level	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Cash and due from banks	Level 1	$	58,724,270	$	58,724,270	$	61,568,446	$	61,568,446
Federal funds sold	Level 2		48,192,000		48,192,000		26,560,000		26,560,000
Interest-bearing deposits at financial institutions	Level 2		15,862,796		15,862,796		22,359,490		22,359,490
Investment securities:
Held to maturity	Level 3		131,361,845		125,292,362		72,079,385		73,005,706
Available for sale	See Previous Table		572,337,329		572,337,329		530,159,986		530,159,986
Loans/leases receivable, net	Level 3		10,407,124		11,239,694		16,716,883		18,054,234
Loans/leases receivable, net	Level 2		1,506,914,312		1,521,560,306		1,250,745,552		1,262,090,766
Deposits:
Nonmaturity deposits	Level 2		1,295,910,195		1,295,910,195		1,039,572,326		1,039,572,326
Time deposits	Level 2		445,921,780		447,290,000		334,541,774		337,343,000
Short-term borrowings	Level 2		169,259,562		169,259,562		171,082,961		171,082,961
Federal Home Loan Bank advances	Level 2		205,350,000		216,440,000		202,350,000		220,815,000
Other borrowings	Level 2		142,646,212		154,164,000		138,239,762		154,101,000
Junior subordinated debentures	Level 2		40,257,438		27,903,509		36,085,000		18,786,000