Note 17 - Commitments and Credit Risk (Detail) (USD $)								6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Credit Card Commitments to Extend Credit [Member]	Dec. 31, 2011 Credit Card Commitments to Extend Credit [Member]	Jun. 30, 2012 Other Loan Commitments to Extend Credit [Member]	Dec. 31, 2011 Other Loan Commitments to Extend Credit [Member]	Dec. 31, 2011 Standby Letters of Credit [Member]	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Maximum [Member]
Other Commitment Other Loans			$ 380,367,000	$ 343,400,000
Other Commitment Credit Cards					368,187,000	285,487,000
Letters of Credit Outstanding, Amount	8,892,000	9,269,000
Letters of Credit Term								12 years	21 years
Deferred Revenue							$ 33,000