Note 8 - Employee Benefit Plans - Defined Benefit Plan Activity (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Fair value of plan assets at beginning of year		$ 36,187
Fair value of plan assets at end of year		29,746	$ 36,187
Pension Plan [Member]
Projected benefit obligation at beginning of year		35,312	34,852
Service cost (1)	[1]	1,297	1,445
Interest cost	[2]	817	736
Actuarial gain (2)	[3]	(11,566)	(786)
Benefits paid		(2,732)	(935)
Projected benefit obligation at end of year		23,128	35,312
Fair value of plan assets at beginning of year		36,187	32,415
Actual return on plan assets		(3,709)	4,707
Benefits paid		(2,732)	(935)
Fair value of plan assets at end of year		29,746	36,187
Funded status at the end of the year		6,618	875
Deferred tax liabilities		(1,390)	(184)
Other assets		6,618	875
Total amounts recognized in the Consolidated Balance Sheet		5,228	691
Net loss		(2,968)	(8,749)
Deferred tax asset		623	1,837
Amount recognized		(2,345)	(6,912)
Benefit obligation		(23,128)	(35,312)
Fair value of assets		29,746	36,187
Unrecognized net actuarial loss		2,968	8,749
Deferred tax liability		(2,013)	(2,021)
Prepaid benefit cost included in other assets		7,573	7,603
Expected return on plan assets	[2]	(2,517)	(2,220)
Amortization of prior service cost	[2]	0	(11)
Recognized net actuarial loss	[2]	441	833
Net periodic benefit cost		38	783
Net gain		(5,781)	(4,106)
Amortization of prior service cost		0	11
Deferred income tax expense		1,214	860
Total recognized		(4,567)	(3,235)
Total recognized in net periodic benefit cost and other comprehensive loss		$ (5,743)	$ (3,312)
Discount rate used for net periodic pension cost		2.50%	2.25%
Discount rate used for disclosure		5.00%	2.50%
Expected return on plan assets		7.50%	7.50%
Rate of compensation increase		3.00%	3.00%

[1] Cost is included in Salaries and Employee Benefits expense.

[2] Cost is included in other operating expense on the Consolidated Statements of Income.

[3] Actuarial (gain) loss in 2022 is composed of loss due to demographic changes of $66 and gain due to change in discount rate of ($11,632). Actuarial (gain) loss in 2021 is composed of loss due to demographic changes of $764, loss due to change in mortality table of $40 and gain due to change in discount rate of ($1,590).