Note 2 - Acquisitions (Detail) (USD $)	12 Months Ended						0 Months Ended			1 Months Ended
	Dec. 31, 2012	Dec. 31, 2010	Sep. 14, 2012 Payable to FDIC [Member] "Truman" [Member]	Oct. 19, 2012 FHLB Borrowings [Member] "Excel" [Member]	Sep. 14, 2012 "Truman" [Member] Cash Received from FDIC [Member]	Sep. 14, 2012 "Truman" [Member] Real Estate, Banking Facilities, Furniture And Equipment [Member]	Sep. 14, 2012 "Truman" [Member]	Oct. 19, 2012 "Excel" [Member] Cash Received from FDIC [Member]	Oct. 19, 2012 "Excel" [Member] Real Estate, Banking Facilities, Furniture And Equipment [Member]	Oct. 19, 2012 "Excel" [Member]	Dec. 31, 2012 "Truman" And "Excel" [Member]
Business Combination, Bargain Purchase, Gain Recognized, Amount	$ 3,411,000	$ 21,314,000					$ 1,100,000			$ 2,300,000
Payments for Merger Related Costs							815,000,000,000			1,100,000
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents					10,500,000			13,800,000
Business Acquisition, Purchase Price Allocation, Other Liabilities			1,300,000	8,200,000
Business Acquisition, Purchase Price Allocation, Other Assets						$ 1,400,000			$ 2,600,000
Business Acquisition, Option To Assume Lease, Expiration											90 days