Note 6 - Fair Value (Tables)

9 Months Ended

Sep. 30, 2012

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, 2012:
Securities available for sale:
U.S. govt. sponsored agency securities	$	343,243,622	$	-	$	343,243,622	$	-
Residential mortgage-backed and related securities		155,690,575		-		155,690,575		-
Municipal securities		90,031,631		-		90,031,631		-
Trust preferred securities		130,400		-		130,400		-
Other securities		1,605,221		235,027		1,370,194		-
	$	590,701,449	$	235,027	$	590,466,422	$	-
December 31, 2011:
Securities available for sale:
U.S. govt. sponsored agency securities	$	428,955,220	$	-	$	428,955,220	$	-
Residential mortgage-backed and related securities		108,853,749		-		108,853,749		-
Municipal securities		25,689,364		-		25,689,364		-
Trust preferred securities		80,800		-		80,800		-
Other securities		1,450,158		191,506		1,258,652		-
	$	565,029,291	$	191,506	$	564,837,785	$	-

Fair Value Measurements, Nonrecurring [Table Text Block]

			Fair Value Measurements at Reporting Date Using
	Fair Value		Level 1		Level 2		Level 3
September 30, 2012:
Impaired loans/leases	$	13,367,633	$	-	$	-	$	13,367,633
Other real estate owned		5,403,014		-		-		5,403,014
	$	18,770,647	$	-	$	-	$	18,770,647
December 31, 2011:
Impaired loans/leases	$	18,361,757	$	-	$	-	$	18,361,757
Other real estate owned		9,056,619		-		-		9,056,619
	$	27,418,376	$	-	$	-	$	27,418,376

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

	As of September 30, 2012				As of December 31, 2011
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Cash and due from banks	$	40,564,561	$	40,564,561	$	53,136,710	$	53,136,710
Federal funds sold		5,725,000		5,725,000		20,785,000		20,785,000
Interest-bearing deposits at financial institutions		49,436,938		49,436,938		26,750,602		26,750,602
Investment securities:
Held to maturity		650,000		650,000		200,000		200,000
Available for sale		590,701,449		590,701,449		565,029,291		565,029,291
Loans/leases receivable, net		1,224,875,461		1,243,192,000		1,181,956,235		1,202,817,000
Accrued interest receivable		6,640,822		6,640,822		6,510,021		6,510,021
Deposits		1,343,235,434		1,346,256,000		1,205,457,788		1,209,197,000
Short-term borrowings		140,888,698		140,888,698		213,536,450		213,536,450
Federal Home Loan Bank advances		196,350,000		216,052,000		204,750,000		223,678,000
Other borrowings		138,237,737		154,663,000		136,231,663		151,813,000
Junior subordinated debentures		36,085,000		18,753,000		36,085,000		18,444,000
Accrued interest payable		1,373,671		1,373,671		1,551,842		1,551,842

Fair Value, by Balance Sheet Grouping [Table Text Block]

	Fair Value		Level 1		Level 2		Level 3
Loans/leases receivable, net *	$	1,229,824,367	$	-	$	1,229,824,367	$	-
Time deposits		361,397,000		-		361,397,000		-
Federal Home Loan Bank advances		216,052,000		-		216,052,000		-
Other borrowings		154,663,000		-		154,663,000		-
Junior subordinated debentures		18,753,000		-		18,753,000		-