Note 8 - Deposits and Borrowed Funds (Detail) - Deposits and borrowed funds (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Time Deposits Over $100 Thousand [Member]
Balance	$ 419,082	$ 536,836
Average Balance	460,833	535,866
Weighted Average Rate	0.33%	0.43%
Securities Sold under Agreements to Repurchase [Member]
Balance	53,687	115,689
Average Balance	81,315	103,127
Weighted Average Rate	0.07%	0.15%
Federal Home Loan Bank Advances [Member]
Balance	25,799	26,023
Average Balance	25,916	41,741
Weighted Average Rate	1.86%	1.25%
Term Repurchase Agreements [Member]
Balance	10,000	10,000
Average Balance	10,000	3,945
Weighted Average Rate	0.99%	0.98%
Line of Credit [Member]
Average Balance		1,933
Weighted Average Rate		2.95%
Federal Funds Purchased [Member]
Average Balance	$ 8	$ 96
Weighted Average Rate	0.58%	0.11%