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Note 12 - Retirement, Savings and Deferred Compensation Plans - Components of SERP Expense (Details) - Supplemental Employee Retirement Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Service cost	$ 126	$ 169	$ 377	$ 508
Interest cost	159	135	477	405
Net amortization	78	127	234	382
Net periodic benefit cost	$ 363	$ 431	$ 1,088	$ 1,295

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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X

- Definition

Amount of cost recognized for passage of time related to defined benefit plan.

+ References

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X

- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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X

- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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