Note 17 - Fair Values of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

	Level in		2017				2016
	Fair Value		Carrying		Fair		Carrying		Fair
	Hierarchy		Amount		Value		Amount		Value
Financial assets
Cash	Level 1	$	11,565	$	11,565	$	11,493	$	11,493
Cash equivalents	Level 2		188,536		188,536		172,103		172,103
Securities available for sale	(1)		335,744		335,744		328,060		328,060
Federal Home Loan Bank stock	(2)		11,036		11,036		8,026		8,026
Loans, net	Level 3		2,536,498		2,520,063		2,359,624		2,353,276
Loans held for sale	Level 2		2,553		2,553		1,035		1,035
Mortgage servicing rights	Level 2		5,106		8,373		5,544		7,997
Accrued interest receivable	Level 2		8,770		8,770		7,714		7,714
Financial liabilities
Deposits	Level 2		2,522,365		2,368,188		2,374,985		2,286,548
Securities sold under agreements to repurchase	Level 2		118,748		118,748		131,710		131,710
Federal Home Loan Bank advances	Level 2		220,000		217,130		175,000		174,734
Subordinated debentures	Level 2		45,517		45,732		44,835		45,220
Accrued interest payable	Level 2		1,919		1,919		1,592		1,592
Interest rate swap	(1)		2		2		84		84