Note 7 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

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

			Fair Value Measurements at March 31, 2018 Using
Description	Balance as of March 31, 2018		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	$	314,889	$	---	$	314,889	$	---
States and political subdivisions		15,778		---		15,778		---
Mortgage-backed securities		608		---		608		---
Corporate debt securities		5,936		---		5,936		---
Total securities available for sale	$	337,211	$	---	$	337,211	$	---

			Fair Value Measurements at December 31, 2017 Using
Description	Balance as of December 31, 2017		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	$	307,719	$	---	$	307,719	$	---
States and political subdivisions		16,834		---		16,834		---
Mortgage-backed securities		659		---		659		---
Corporate debt securities		6,175		---		6,175		---
Total securities available for sale	$	331,387	$	---	$	331,387	$	---

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:
March 31, 2018	Impaired loans net of valuation allowance	$	1,279	$	---	$	---	$	1,279
December 31, 2017	Impaired loans net of valuation allowance		1,303		---		---		1,303

				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:
March 31, 2018	Other real estate owned net of valuation allowance	$	2,741					$	2,741
December 31, 2017	Other real estate owned net of valuation allowance		2,817		---		---		2,817

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

Impaired Loans	Valuation Technique	Unobservable Input	Range (Weighted Average)
March 31, 2018	Present value of cash flows	Discount rate		5.50%	–	13.25%	(5.92%)
December 31, 2017	Present value of cash flows	Discount rate		5.50%	–	13.25%	(5.92%)

March 31, 2018	Valuation Technique	Unobservable Input	Range (Weighted Average)
Other real estate owned	Discounted appraised value	Selling cost		5.00%	–	6.01%	(5.14%)
Other real estate owned	Discounted appraised value	Discount for lack of marketability and age of appraisal		1.68%	–	86.03%	(13.35%)

December 31, 2017	Valuation Technique	Unobservable Input	Range (Weighted Average)
Other real estate owned	Discounted appraised value	Selling cost		2.00%	–	6.01%	(4.72%)
Other real estate owned	Discounted appraised value	Discount for lack of marketability and age of appraisal		1.68%	–	68.33%	(11.07%)

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

	March 31, 2018
	Carrying Amount		Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3
Financial Assets:
Cash and due from banks	$	10,598	$	10,598	$	---	$	---
Interest-bearing deposits		76,571		76,571		---		---
Securities		460,116		---		461,760		---
Restricted securities		1,221		---		1,221		---
Loans, net		651,272		---		---		648,273
Accrued interest receivable		5,360		---		5,360		---
Bank-owned life insurance		33,984		---		33,984		---
Financial Liabilities:
Deposits	$	1,072,940	$	---	$	961,305	$	111,627
Accrued interest payable		55		---		55		---

	December 31, 201 7
	Carrying Amount		Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3
Financial Assets:
Cash and due from banks	$	12,926	$	12,926	$	---	$	---
Interest-bearing deposits		51,233		51,233		---		---
Securities		458,551		---		461,500		---
Restricted securities		1,200		---		1,200		---
Loans held for sale		260		---		260		---
Loans, net		660,144		---		---		656,399
Accrued interest receivable		5,297		---		5,297		---
Bank-owned life insurance		33,756		---		33,756		---
Financial Liabilities:
Deposits	$	1,059,734	$	---	$	944,850	$	113,053
Accrued interest payable		62		---		62		---