Note 5 - Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

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

	Three months ended
	March 31,
(In thousands)	2018		2017
Current income tax expense
Federal	$	2,436	$	3,003
State		128		114
Total current income tax expense		2,564		3,117
Deferred income tax (benefit) expense
Federal		467		(26	)
State		21		38
Total deferred income tax expense		488		12
Change in valuation allowance		-		13
Total income tax expense	$	3,052	$	3,142

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

	Three months ended March 31,
	2018			2017
U.S. federal statutory income tax rate		21.0	%		35.0	%
Excess tax benefits from share-based compensation arrangements		(1.9	)		(7.1	)
Tax credits		(0.4	)		(5.5	)
Tax exempt interest income		(0.5	)		(1.1	)
Increase in cash surrender value of life insurance		(0.4	)		(1.3	)
State income taxes, net of federal benefit		0.7			0.7
Other, net		-			1.9
Effective income tax rate		18.5	%		22.6	%