Note 6 - Fair Value (Detail) - Fair Values of Company's Financial Assets (USD $)	Jun. 30, 2012		Dec. 31, 2011
Loans/leases receivable, net *	$ 1,214,239,000		$ 1,202,817,000
Time deposits	1,318,758,000		1,209,197,000
Federal Home Loan Bank advances	222,454,000		223,678,000
Other borrowings	185,399,038		213,536,450
Junior subordinated debentures	18,670,000		18,444,000
Excluding Impaired Loans [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Loans/leases receivable, net *	1,201,406,249	[1]
Excluding Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
Loans/leases receivable, net *		[1]
Excluding Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Loans/leases receivable, net *	1,201,406,249	[1]
Excluding Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Loans/leases receivable, net *		[1]
Estimate of Fair Value, Fair Value Disclosure [Member]
Loans/leases receivable, net *	12,832,751		18,361,757
Time deposits	371,942,000
Federal Home Loan Bank advances	222,454,000
Other borrowings	153,872,000
Junior subordinated debentures	18,670,000
Fair Value, Inputs, Level 1 [Member]
Loans/leases receivable, net *	0		0
Fair Value, Inputs, Level 2 [Member]
Loans/leases receivable, net *	0		0
Time deposits	371,942,000
Federal Home Loan Bank advances	222,454,000
Other borrowings	153,872,000
Junior subordinated debentures	18,670,000
Fair Value, Inputs, Level 3 [Member]
Loans/leases receivable, net *	$ 12,832,751		$ 18,361,757

[1] Excludes impaired loans/leases totaling $12,832,751 measured at fair value on a non-recurring basis and reported separately.