Note 14 - Financial Instruments With Off-Balance Sheet Risk (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Commitments to Extend Credit [Member]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 129,000	$ 118,000
Standby Letters of Credit [Member]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 24,400	$ 25,000