Note 2 - Securities (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Marketable Securities [Table Text Block]

	March 31, 2021
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Securities available for sale:
U.S. Treasury	$	30,152	$	—	$	106	$	30,046
Federal agencies and GSEs		108,465		1,539		677		109,327
Mortgage-backed and CMOs		262,898		4,384		2,369		264,913
State and municipal		63,410		1,597		434		64,573
Corporate		13,001		284		1		13,284
Total securities available for sale	$	477,926	$	7,804	$	3,587	$	482,143

	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]

	March 31, 2021		December 31, 2020
FRB stock	$	6,468	$	6,458
FHLB stock		1,556		2,257
Total restricted stock	$	8,024	$	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	$	30,046	$	106	$	30,046	$	106	$	—	$	—
Federal agencies and GSEs		56,948		677		55,779		660		1,169		17
Mortgage-backed and CMOs		123,513		2,369		119,315		2,363		4,198		6
State and municipal		18,278		434		18,278		434		—		—
Corporate		1,999		1		1,999		1		—		—
Total	$	230,784	$	3,587	$	225,417	$	3,564	$	5,367	$	23

	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 March 31, 2021
Realized gains (losses):
Gross realized gains	$	—
Gross realized losses		—
Net realized gains	$	—
Proceeds from sales of securities	$	—

	Three Months Ended March 31, 2020
Realized gains (losses):
Gross realized gains	$	814
Gross realized losses		—
Net realized gains	$	814
Proceeds from sales of securities	$	5,811