Note 8 - Securities Sold Under Agreements to Repurchase and Other Long-term Borrowings (Detail) - Long-Term Borrowings (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2007
Federal Home Loan Bank advances (in Dollars)	$ 29,297	$ 40,694
Federal Home Loan Bank advances	4.04%	4.14%
Subordinated notes payable (in Dollars)	48,970	48,970
Subordinated notes payable	1.77%	4.27%
Securities sold under agreements to repurchase (in Dollars)	100,000	150,000	200,000
Securities sold under agreements to repurchase	3.95%	3.96%	3.95%
Total long-term borrowings (in Dollars)	$ 178,267	$ 239,664
Total long-term borrowings	3.36%	4.05%