Note 19 - Fair Value (Tables)

12 Months Ended

Dec. 31, 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)
December 31, 2012:
Securities available for sale:
U.S. govt. sponsored agency securities	$	338,609,371	$	-	$	338,609,371	$	-
Residential mortgage-backed 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	$	-
December 31, 2011:
Securities available for sale:
U.S. govt. sponsored agency securities	$	428,955,220	$	-	$	428,955,220	$	-
Residential mortgage-backed 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 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)
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
December 31, 2011:
Impaired loans/leases	$	19,603,360	$	-	$	-	$	19,603,360
Other real estate owned		9,056,619		-		-		9,056,619
	$	28,659,979	$	-	$	-	$	28,659,979

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

		As of December 31, 2012				As of December 31, 2011
	Fair Value Heirarchy Level	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Cash and due from banks	Level 1	$	61,568,446	$	61,568,446	$	53,136,710	$	53,136,710
Federal funds sold	Level 2		26,560,000		26,560,000		20,785,000		20,785,000
Interest-bearing deposits at financial institutions	Level 2		22,359,490		22,359,490		26,750,602		26,750,602
Investment securities:
Held to maturity	Level 3		72,079,385		73,005,706		200,000		200,000
Available for sale	See Previous Table		530,159,986		530,159,986		565,029,291		565,029,291
Loans/leases receivable, net	Level 3		16,716,883		18,054,234		18,151,259		19,603,360
Loans/leases receivable, net	Level 2		1,250,745,552		1,262,090,766		1,163,804,976		1,183,213,640
Deposits:
Nonmaturity deposits	Level 2		1,039,572,326		1,039,572,326		867,972,148		867,972,148
Time deposits	Level 2		334,541,774		337,343,000		337,485,640		341,224,852
Short-term borrowings	Level 2		171,082,961		171,082,961		213,536,450		213,536,450
Federal Home Loan Bank advances	Level 2		202,350,000		220,815,000		204,750,000		223,678,000
Other borrowings	Level 2		138,239,762		154,101,000		136,231,663		151,813,000
Junior subordinated debentures	Level 2		36,085,000		18,786,000		36,085,000		18,444,000