Note 2 - Securities (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Marketable Securities [Table Text Block]

	September 30, 2021
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Securities available for sale:
U.S. Treasury	$	110,154	$	92	$	205	$	110,041
Federal agencies and GSEs		89,680		1,298		482		90,496
Mortgage-backed and CMOs		358,910		3,933		2,436		360,407
State and municipal		62,813		1,336		282		63,867
Corporate		18,950		248		60		19,138
Total securities available for sale	$	640,507	$	6,907	$	3,465	$	643,949

	December 31, 2020
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Securities available for sale:
U.S. Treasury	$	34,997	$	1	$	—	$	34,998
Federal agencies and GSEs		104,092		1,976		45		106,023
Mortgage-backed and CMOs		246,770		6,117		105		252,782
State and municipal		57,122		1,979		2		59,099
Corporate		13,011		188		10		13,189
Total securities available for sale	$	455,992	$	10,261	$	162	$	466,091

Schedule of Cost of Investments in Restricted Stock [Table Text Block]

	September 30, 2021		December 31, 2020
FRB stock	$	6,490	$	6,458
FHLB stock		1,556		2,257
Total restricted stock	$	8,046	$	8,715

Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]

	Total				Less than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. Treasury	$	75,384	$	205	$	75,384	$	205	$	—	$	—
Federal agencies and GSEs		54,053		482		48,140		302		5,913		180
Mortgage-backed and CMOs		208,634		2,436		202,455		2,302		6,179		134
State and municipal		17,869		282		15,440		166		2,429		116
Corporate		7,690		60		7,690		60		—		—
Total	$	363,630	$	3,465	$	349,109	$	3,035	$	14,521	$	430

	Total				Less than 12 Months				12 Months or More
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
Federal agencies and GSEs	$	21,237	$	45	$	19,974	$	26	$	1,263	$	19
Mortgage-backed and CMOs		46,640		105		46,640		105		—		—
State and municipal		3,456		2		3,456		2		—		—
Corporate		5,990		10		5,990		10		—		—
Total	$	77,323	$	162	$	76,060	$	143	$	1,263	$	19

Realized Gain (Loss) on Investments [Table Text Block]

	Three Months Ended September 30, 2021		Nine Months Ended September 30, 2021
Realized gains:
Gross realized gains	$	—	$	—
Gross realized losses		—		—
Net realized gains	$	—	$	—
Proceeds from sales of securities	$	—	$	—

	Three Months Ended September 30, 2020		Nine Months Ended September 30, 2020
Realized gains:
Gross realized gains	$	—	$	814
Gross realized losses		—		—
Net realized gains	$	—	$	814
Proceeds from sales of securities	$	—	$	5,811