Note 6 - Commitments and Contingencies (Detail) - The Contractual Amount of the Company’s Financial instruments with Off-Balance Sheet Risk (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Off-Balance Sheet Risk	$ 148,665	$ 134,690
Standby Letters of Credit [Member]
Off-Balance Sheet Risk	10,835	15,765
Commitments to Extend Credit [Member]
Off-Balance Sheet Risk	119,581	105,049
Commercial Letters Of Credit [Member]
Off-Balance Sheet Risk	10,582	5,818
Operating Leases [Member]
Off-Balance Sheet Risk	$ 7,667	$ 8,058