Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

(In thousands)	2015		2014			2013
Current tax expense
Federal	$	15,478	$	14,958		$	10,322
State		608		641			336
Total current tax expense		16,086		15,599			10,658
Deferred tax expense (benefit)
Federal		748		(385	)		450
State		54		26			120
Total deferred tax expense (benefit)		802		(359	)		570
Change in valuation allowance		45		41			-
Total income tax expense	$	16,933	$	15,281		$	11,228

Schedule of Income Tax Expense (Benefit) Recorded Directly to Stockholders' Equity [Table Text Block]

(In thousands)	2015			2014			2013
Unrealized (loss) gain on securities available for sale	$	(839	)	$	2,383		$	(4,234	)
Reclassification adjustment for securities losses realized in income		-			3			2
Reclassification adjustment for  securities impairment realized in income		36			-			-
Unrealized (loss) gain on derivatives		(41	)		-			8
Compensation expense for tax purposes in excess of amounts recognized for financial reporting purposes		(673	)		(378	)		(265	)
Minimum pension liability adjustment		61			(69	)		111
Total income tax (benefit) expense recorded directly to stockholders' equity	$	(1,456	)	$	1,939		$	(4,378	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2015			2014			2013
U.S. federal income tax rate		35.0	%		35.0	%		35.0	%
Tax exempt interest income		(1.4	)		(1.5	)		(2.1	)
Tax credits		(2.5	)		(3.1	)		(2.5	)
Cash surrender value of life insurance		(0.8	)		(1.4	)		(2.0	)
State income taxes		0.8			0.9			0.8
Nontaxable gain on acquisition		-			-			(0.4	)
Nondeductible acquisition costs		-			-			0.2
Other, net		0.2			0.6			0.2
		31.3	%		30.5	%		29.2	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
(In thousands)	2015		2014
Allowance for loan loss	$	8,029	$	8,929
Deferred compensation		5,730		5,442
Accrued expenses		1,515		1,854
Investments in partnerships		1,177		1,031
Write-downs and costs associated with other real estate owned		435		491
Loans		659		678
Other-than-temporary impairment		347		310
Other assets		187		219
Total deferred tax assets		18,079		18,954
Securities		1,655		2,594
Property and equipment		1,158		1,250
Loan costs		843		756
Prepayment penalty on modification of FHLB advances		-		76
Mortgage servicing rights		315		356
Leases		611		422
Core deposit intangible		573		652
Other liabilities		473		430
Total deferred tax liabilities		5,628		6,536
Valuation allowance		86		41
Net deferred tax asset	$	12,365	$	12,377

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

(In thousands)	2015			2014
Balance as of January 1	$	40		$	40
Increases - current year tax positions		11			11
Increases - prior year tax positions		-			-
Settlements		-			-
Lapse of statute of limitations		(11	)		(11	)
Balance as of December 31	$	40		$	40