Note 2 - Acquisitions (Detail) - A summary, at fair value, of the assets acquired and liabilities assumed in the Truman transaction, as of the acquisition date: (USD $) In Thousands, unless otherwise specified	12 Months Ended																																						0 Months Ended			0 Months Ended
	Dec. 31, 2012	Dec. 31, 2010	Sep. 14, 2012 Acquired From the FDIC [Member] Non-Interest Bearing Transaction Accounts [Member] "Truman" [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] Interest Bearing Transaction Accounts and Savings Deposits [Member] "Truman" [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] Time Deposits [Member] "Truman" [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] Total Deposits [Member] "Truman" [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] Fed Funds Purchased and Other Borrowings [Member] "Truman" [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] Payable to FDIC [Member] "Truman" [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] "Truman" [Member] Cash and Due from banks [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] "Truman" [Member] Cash Received from FDIC [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] "Truman" [Member] Federal Funds Sold [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] "Truman" [Member] Loans Acquired, Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] "Truman" [Member] Loans Acquired, Not Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] "Truman" [Member] Foreclosed Assets Covered by FDIC Loss Share [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] "Truman" [Member] Foreclosed Assets Not Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Acquired From the FDIC [Member] "Truman" [Member]	Sep. 14, 2012 Fair Value Adjustments [Member] "Truman" [Member] Loans Acquired, Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Fair Value Adjustments [Member] "Truman" [Member] Loans Acquired, Not Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Fair Value Adjustments [Member] "Truman" [Member] Foreclosed Assets Covered by FDIC Loss Share [Member]	Sep. 14, 2012 Fair Value Adjustments [Member] "Truman" [Member] Foreclosed Assets Not Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Fair Value Adjustments [Member] "Truman" [Member] FDIC Indemnification Asset [Member]	Sep. 14, 2012 Fair Value Adjustments [Member] "Truman" [Member] Core Deposit Premium [Member]	Sep. 14, 2012 Fair Value Adjustments [Member] "Truman" [Member]	Sep. 14, 2012 Fair Value [Member] Non-Interest Bearing Transaction Accounts [Member] "Truman" [Member]	Sep. 14, 2012 Fair Value [Member] Interest Bearing Transaction Accounts and Savings Deposits [Member] "Truman" [Member]	Sep. 14, 2012 Fair Value [Member] Time Deposits [Member] "Truman" [Member]	Sep. 14, 2012 Fair Value [Member] Total Deposits [Member] "Truman" [Member]	Sep. 14, 2012 Fair Value [Member] Fed Funds Purchased and Other Borrowings [Member] "Truman" [Member]	Sep. 14, 2012 Fair Value [Member] Payable to FDIC [Member] "Truman" [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] Cash and Due from banks [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] Cash Received from FDIC [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] Federal Funds Sold [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] Loans Acquired, Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] Loans Acquired, Not Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] Foreclosed Assets Covered by FDIC Loss Share [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] Foreclosed Assets Not Covered By FDIC Loss Share [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] FDIC Indemnification Asset [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member] Core Deposit Premium [Member]	Sep. 14, 2012 Fair Value [Member] "Truman" [Member]	Sep. 14, 2012 Payable to FDIC [Member] "Truman" [Member]	Sep. 14, 2012 "Truman" [Member] Cash Received from FDIC [Member]	Sep. 14, 2012 "Truman" [Member]
Assets Acquired
Cash and equivalents									$ 22,467	$ 10,495	$ 12,338																			$ 22,467	$ 10,495	$ 12,338									$ 10,500
Investment securities																23,540																							23,540
Loans acquired												87,620	89,360				(30,479)	(15,965)															57,141	73,395
Foreclosed assets														20,723	10,314				(5,607)	(2,563)															15,116	7,751
Intangible assets																					26,723	1,191															26,723	1,191
Other assets																1,478							149																1,627
Total assets acquired	433,710	559,629														279,725							(26,551)																253,174
Premises and equipment																1,390																							1,390
Deposits:
Other liabilities			22,275	70,705	135,573	228,553	21,456	1,285																22,275	70,705	135,573	228,553	21,456	1,285											1,300
Accrued interest and other liabilities																403							357																760
Total liabilities assumed	430,299	538,315														251,697							357																252,054
Pre-tax gain on FDIC-assisted transaction	$ 3,411	$ 21,314																																					$ 1,120			$ 1,100