Note 17 - Fair Value Measurements and Fair Values of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Financial Assets Measured at Fair Value on a Recurring and Nonrecurring Basis

December 31, 2017	Quotedprices in active markets for identical assets (Level 1)		Significant other observable input (Level 2)		Significant unobservable inputs (Level 3)		Balance at end of period
Recurring fair value measurements
Securities available-for-sale
U.S. Government agency securities		—	$	70,524		—	$	70,524
State and municipal securities		—		76,804		—		76,804
U.S. Government agencies and sponsored    enterprises (GSEs):
Mortgage-backed securities		—		142,703		—		142,703
Collateralized mortgage obligations (CMOs)		—		76,302		—		76,302
Pooled trust preferred securities		—		—	$	215		215
Corporate debt securities		—		8,022		—		8,022
Equity securities	$	4,975		—		—		4,975
Total securities available-for-sale	$	4,975	$	374,355	$	215	$	379,545
Total recurring fair value measurements	$	4,975	$	374,355	$	215	$	379,545
Nonrecurring fair value measurements *
Impaired loans	$	—	$	—	$	1,067	$	1,067
Mortgage servicing rights		—		—		34		34
Total nonrecurring fair value measurements	$	—	$	—	$	1,101	$	1,101

* impairment

December 31, 2016	Quotedprices in active markets for identical assets (Level 1)		Significant other observable input (Level 2)		Significant unobservable inputs (Level 3)		Balance at end of period
Recurring fair value measurements
Trading Securities
State and municipal securities	$	—	$	3,596	$	—	$	3,596
Securities available-for-sale
U.S. Government agency securities		—	$	76,650		—	$	76,650
State and municipal securities		—		72,295		—		72,295
U.S. Government agencies and sponsored    enterprises (GSEs):
Mortgage-backed securities		—		145,301		—		145,301
Collateralized mortgage obligations (CMOs)		—		77,415		—		77,415
Pooled trust preferred securities		—		—	$	2,281		2,281
Corporate debt securities		—		8,030		—		8,030
Equity securities	$	8,503		—		—		8,503
Total securities available-for-sale	$	8,503	$	379,691	$	2,281	$	390,475
Total recurring fair value measurements	$	8,503	$	383,287	$	2,281	$	394,071
Nonrecurring fair value measurements *
Impaired loans	$	—	$	—	$	2,899	$	2,899
Mortgage servicing rights		—		—		58		58
Total nonrecurring fair value measurements	$	—	$	—	$	2,957	$	2,957

* impairment

Quantitative Information about Assets Measured at Fair Value

	Quantitative information about Level 3 fair value measurements
December 31, 2017	Fairvalue		Valuation techniques		Unobservable input		Valueor range of values
Impaired loans	$	943	Appraisalof collateral	(1)	Appraisal adjustments	(2)	-15% to -90%
					Liquidation expenses	(3)	-10%
Impaired loans		124	Financial statement values for UCC collateral		Financial statement value discounts	(5)	-25% to -50%
Mortgage servicing rights		34	Discounted cash flow		Remaining term		2 - 26 yrs
					Discount rate		13% to 15%

	Quantitative information about Level 3 fair value measurements
December 31, 2016	Fairvalue		Valuation techniques		Unobservable input		Valueor range of values
Impaired loans	$	938	Appraisalof collateral	(1)	Appraisal adjustments	(2)	-10% to -80%
					Liquidation expenses	(3)	-10%
Impaired loans		76	Used commercial vehicle and equipment guides		Guide value discounts	(4)	0% to -25%
Impaired loans		1,880	Financial statement values for UCC collateral		Financial statement value discounts	(5)	-20% to -50%
Impaired loans		5	Agreement of sale	(6)
Mortgage servicing rights		58	Discounted cash flow		Remaining term		2 - 27 yrs
					Discount rate		14% to 16%

Available-for-sale Securities Measured at Fair Value Using Significant Unobservable Inputs

	Fair value measurements using significant unobservable inputs (Level 3)
Securities available-for-sale	2017			2016
Balance, beginning of year	$	2,281		$	2,653
Payments received		(55	)		(381	)
Sale of securities		(2,026	)		—
Total gains or losses (realized/unrealized)
Included in earnings		(15	)		—
Included in other comprehensive    income		30			9
Transfers in and/or out of Level 3		—			—
Balance, end of year	$	215		$	2,281

Financial and Off-balance Sheet Instruments

					Fair value measurements
December 31, 2017	Carrying amount		Fair value		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 cash equivalents	$	16,331	$	16,331	$	16,331		—		—
Investment securities:
Trading		—		—		—		—		—
Available-for-sale		379,545		379,545		4,975	$	374,355	$	215
Restricted investment in bank stocks		1,501		1,501		—		1,501		—
Net loans		725,442		727,341		—		—		727,341
Mortgage servicing rights		483		585		—		—		585
Accrued interest receivable		3,545		3,545		—		3,545		—
Financial liabilities
Deposits with no stated maturities	$	768,766	$	768,766	$	768,766		—	$	—
Deposits with stated maturities		225,182		223,325		—	$	223,325		—
Short-term borrowings		55,756		55,756		55,756		—		—
Accrued interest payable		384		384		—		384		—
Off-balance sheet instruments
Commitments to extend credit	$	—	$	—	$	—	$	—	$	—
Standby letters of credit		—		—		—		—		—

					Fair value measurements
December 31, 2016	Carrying amount		Fair value		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 cash equivalents	$	10,721	$	10,721	$	10,721		—		—
Investment securities:
Trading		3,596		3,596		—	$	3,596		—
Available-for-sale		390,475		390,475		8,503		379,691	$	2,281
Restricted investment in bank stocks		1,017		1,017		—		1,017		—
Loans held-for-sale		789		789		—		789		—
Net loans		625,685		626,052		—		—		626,052
Mortgage servicing rights		498		579		—		—		579
Accrued interest receivable		3,128		3,128		—		3,128		—
Financial liabilities
Deposits with no stated maturities	$	687,773	$	687,773	$	687,773		—	$	—
Deposits with stated maturities		225,582		225,403		—	$	225,403		—
Short-term borrowings		52,660		52,660		52,660		—		—
Accrued interest payable		335		335		—		335		—
Off-balance sheet instruments
Commitments to extend credit	$	—	$	—	$	—	$	—	$	—
Standby letters of credit		—		—		—		—		—