Note 16 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

			Fair Value Measurements at December 31, 20 16 Using
Description	Balance as of December 31, 2016		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
U.S. Government agencies and corporations	$	285,598	$	---	$	285,598	$	---
States and political subdivisions		11,693		---		11,693		---
Mortgage-backed securities		930		---		930		---
Corporate debt securities		5,898		---		5,898		---
Other securities		163		---		163		---
Total securities available for sale	$	304,282	$	---	$	304,282	$	---

			Fair Value Measurements at December 31, 20 15 Using
Description	Balance as of December 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
U.S. Government agencies and corporations	$	212,464	$	---	$	212,464	$	---
States and political subdivisions		16,475		---		16,475		---
Mortgage-backed securities		1,319		---		1,319		---
Corporate debt securities		5,746		---		5,746		---
Other securities		127		---		127		---
Total securities available for sale	$	236,131	$	---	$	236,131	$	---

Fair Value Measurements, Nonrecurring [Table Text Block]

				Carrying value
Date	Description	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	Assets:
December 31, 201 6	Impaired loans net of valuation allowance	$	878	$	---	$	---	$	878
December 31, 201 5	Impaired loans net of valuation allowance		2,328		---		---		2,328

				Carrying Value
Date	Description	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	Assets:
December 31, 201 6	Other real estate owned net of valuation allowance	$	3,156	$	---	$	---	$	3,156
December 31, 201 5	Other real estate owned net of valuation allowance		4,165		---		---		4,165

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

	Valuation Technique	Unobservable Input	Range (Weighted Average)
Impaired loans	Present value of cash flows	Discount rate		6.75%	-	8.00%	(7.35%)

	Valuation Technique	Unobservable Input	Range (Weighted Average)
Impaired loans	Present value of cash flows	Discount rate		6.00%	-	7.38%	(6.56%)

	Valuation Technique	Unobservable Input	Range (Weighted Average)
Other real estate owned	Discounted appraised value	Selling cost		2.91% (1)	–	8.60%	(6.48%)
Other real estate owned	Discounted appraised value	Discount for lack of marketability and age of appraisal		0%	-	53.46%	(13.66%)

	Valuation Technique	Unobservable Input	Range (Weighted Average)
Other real estate owned	Discounted appraised value	Selling cost		0% (1)	–	10.00%	(5.89%)
Other real estate owned	Discounted appraised value	Discount for lack of marketability and age of appraisal		0%	-	50.01%	(10.16%)

Fair Value, by Balance Sheet Grouping [Table Text Block]

	December 31, 2016
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3
Financial assets:
Cash and due from banks	$	13,974	$	13,974	$	---	$	---
Interest-bearing deposits		80,268		80,268		---		---
Securities		439,239		---		441,974		---
Restricted securities		1,170		---		1,170		---
Mortgage loans held for sale		478		---		478		---
Loans, net		639,452		---		---		658,386
Accrued interest receivable		5,260		---		5,260		---
Bank-owned life insurance		22,998		---		22,998		---
Financial liabilities:
Deposits	$	1,043,442	$	---	$	874,001	$	166,946
Accrued interest payable		55		---		55		---

	December 31, 201 5
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3
Financial assets:
Cash and due from banks	$	12,152	$	12,152	$	---	$	---
Interest-bearing deposits		130,811		130,811		---		---
Securities		388,159		---		394,163		---
Restricted securities		1,129		---		1,129		---
Mortgage loans held for sale		634		---		634		---
Loans, net		610,711		---		---		621,590
Accrued interest receivable		5,769		---		5,769		---
Bank-owned life insurance		22,401		---		22,401		---
Financial liabilities:
Deposits	$	1,018,859	$	---	$	826,476	$	193,912
Accrued interest payable		56		---		56		---