Note 11 - Federal Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	2016			2015			2014
Current expense	$	15,786,000		$	7,399,000		$	3,359,000
Deferred expense		(699,000	)		4,592,000			4,506,000
Change in valuation allowance		(113,000	)		(180,000	)		0
Tax expense	$	14,974,000		$	11,811,000		$	7,865,000

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

	2016			2015			2014
Tax at statutory rate (35%)	$	16,410,000		$	13,591,000		$	8,819,000
Increase (decrease) from
Tax-exempt interest		(876,000	)		(781,000	)		(621,000	)
Bank owned life insurance		(440,000	)		(384,000	)		(415,000	)
Change in valuation allowance		(113,000	)		(180,000	)		0
Other		(7,000	)		(435,000	)		82,000
Tax expense	$	14,974,000		$	11,811,000		$	7,865,000

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

	2016			2015
Deferred income tax assets
Allowance for loan losses	$	6,286,000		$	5,488,000
Deferred compensation		1,175,000			1,367,000
Stock compensation		786,000			767,000
Nonaccrual loan interest income		623,000			602,000
Deferred loan fees		496,000			504,000
Capital loss carryforward		157,000			270,000
Fair value write-downs on foreclosed properties		24,000			115,000
Fair value of interest rate swap		30,000			89,000
Unrealized loss on securities		2,976,000			0
Other		408,000			283,000
Deferred tax asset before valuation allowance		12,961,000			9,485,000
Valuation allowance		(157,000	)		(270,000	)
Deferred tax asset after valuation allowance		12,804,000			9,215,000
Deferred income tax liabilities
Depreciation		928,000			1,128,000
Prepaid expenses		463,000			378,000
Core deposit intangible		3,423,000			4,349,000
Mortgage loan servicing rights		1,940,000			2,142,000
Unrealized gain on securities		0			768,000
Business combination adjustments		2,183,000			1,091,000
Other		199,000			188,000
Deferred tax liability		9,136,000			10,044,000
Total net deferred tax asset (liability)	$	3,668,000		$	(829,000	)