Note 8 - Income Taxes (Detail) - Deferred Tax Assets and Liabilites (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Deferred tax assets
Loans acquired	$ 15,191	$ 7,150
FDIC true-up liability	1,675	1,341
Allowance for loan losses	10,801	11,457
Valuation of foreclosed assets	792	393
Deferred compensation payable	1,621	1,591
FHLB advances	443	547
Vacation compensation	1,049	1,052
Accumulated depreciation	166
Loan interest	767	767
Other	565	522
Total deferred tax assets	33,070	24,820
Deferred tax liabilities
Accumulated depreciation		(189)
Deferred loan fee income and expenses, net	(2,214)	(1,742)
FHLB stock dividends	(410)	(430)
Goodwill and core deposit premium amortization	(10,824)	(9,725)
FDIC indemnification asset	(23,357)	(18,703)
Available-for-sale securities	(376)	(283)
Other	(2,889)	(569)
Total deferred tax liabilities	(40,070)	(31,641)
Net deferred tax liabilities included in other liabilities on balance sheets	$ (7,000)	$ (6,821)