Note 3 - Loans/Leases Receivable (Detail) - Delinquency Status (USD $)	Sep. 30, 2012	Dec. 31, 2011
Delinquent Loan Status	$ 1,224,875,461	$ 1,181,956,235
Performing [Member] | Leases receivable [Member]
Delinquent Loan Status	100,944,144	91,905,699
Performing [Member] | Residential Real Estate [Member]
Delinquent Loan Status	110,974,915	96,973,576
Performing [Member] | Installment and Other Consumer [Member]
Delinquent Loan Status	76,078,511	77,126,064
Performing [Member]
Delinquent Loan Status	287,997,570	266,005,339
Nonperforming [Member] | Leases receivable [Member]
Delinquent Loan Status	1,094,724	1,306,663
Nonperforming [Member] | Residential Real Estate [Member]
Delinquent Loan Status	1,517,304	1,133,475
Nonperforming [Member] | Installment and Other Consumer [Member]
Delinquent Loan Status	759,478	1,097,016
Nonperforming [Member]
Delinquent Loan Status	3,371,506	3,537,154
Delinquent Loans [Member] | Leases receivable [Member]
Delinquent Loan Status	102,038,868	93,212,362
Delinquent Loans [Member] | Residential Real Estate [Member]
Delinquent Loan Status	112,492,219	98,107,051
Delinquent Loans [Member] | Installment and Other Consumer [Member]
Delinquent Loan Status	76,837,989	78,223,080
Delinquent Loans [Member]
Delinquent Loan Status	291,369,076	269,542,493
Leases receivable [Member]
Delinquent Loan Status	$ 103,881,635	$ 95,089,877