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Note 8 - Employee Benefit Plans - Defined Benefit Plan Activity (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Fair value of plan assets at beginning of year $ 32,415  
Fair value of plan assets at end of year 36,187 $ 32,415
Other assets (liabilities) 875 (2,437)
Net (gain) loss (4,106) 1,871
Deferred income tax expense (benefit) 860 (416)
Pension Plan [Member]    
Projected benefit obligation at beginning of year 34,852 29,641
Service cost (1) [1] 1,445 1,080
Interest cost 736 820
Actuarial loss (gain) (2) [2] (786) 4,621
Benefits paid (935) (1,310)
Projected benefit obligation at end of year 35,312 34,852
Fair value of plan assets at beginning of year 32,415 25,007
Actual return on plan assets 4,707 3,718
Employer contribution 0 5,000
Benefits paid (935) (1,310)
Fair value of plan assets at end of year 36,187 32,415
Funded status at the end of the year 875 (2,437)
Deferred tax asset (liability) (184) 512
Total amounts recognized in the Consolidated Balance Sheet 691 (1,925)
Net loss (8,749) (12,855)
Prior service cost 0 11
Deferred tax asset 1,837 2,697
Amount recognized (6,912) (10,147)
Benefit obligation (35,312) (34,852)
Fair value of assets 36,187 32,415
Unrecognized net actuarial loss 8,749 12,855
Unrecognized prior service cost 0 (11)
Deferred tax liability (2,021) (2,185)
Prepaid benefit cost included in other assets 7,603 8,222
Expected return on plan assets (2,220) (1,679)
Amortization of prior service cost (11) (110)
Recognized net actuarial loss 833 710
Net periodic benefit cost 783 821
Amortization of prior service cost 11 110
Total recognized (3,235) 1,565
Total recognized in net periodic benefit cost and other comprehensive (loss) income $ (3,312) $ 2,802
Discount rate used for net periodic pension cost 2.25% 3.00%
Discount rate used for disclosure 2.50% 2.25%
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] Actuarial loss (gain) 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).