Note 6 - Fair Value (Detail) - Assets Measured at Fair Value on a Non-recurring Basis (USD $)	Jun. 30, 2012	Dec. 31, 2011
Impaired loans/leases	$ 1,214,239,000	$ 1,202,817,000
Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans/leases	12,832,751	18,361,757
Other real estate owned	9,866,918	9,056,619
Total	22,699,669	27,418,376
Fair Value, Inputs, Level 1 [Member]
Impaired loans/leases	0	0
Other real estate owned	0	0
Total	0	0
Fair Value, Inputs, Level 2 [Member]
Impaired loans/leases	0	0
Other real estate owned	0	0
Total	0	0
Fair Value, Inputs, Level 3 [Member]
Impaired loans/leases	12,832,751	18,361,757
Other real estate owned	9,866,918	9,056,619
Total	$ 22,699,669	$ 27,418,376