Note 3 - Loans/Leases Receivable (Detail) - Concentration By Industries (USD $)	Dec. 31, 2012	Dec. 31, 2011
Balance (in Dollars)	$ 1,284,211,234	$ 1,198,140,621
Lessors of Non-Residential Buildings [Member]
Balance (in Dollars)	178,060,120	179,510,937
Percentage of Total Loans/Leases	14.00%	15.00%
Lessors of Residential Buildings [Member]
Balance (in Dollars)	61,459,574	50,029,069
Percentage of Total Loans/Leases	5.00%	4.00%
Bank Holding Companies [Member]
Balance (in Dollars)	$ 47,662,055	$ 38,046,779
Percentage of Total Loans/Leases	4.00%	3.00%

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant