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Note 18 - Post-retirement Benefits (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 1,300	$ 900
Deferred Compensation Liability, Current and Noncurrent, Total	8,457		$ 9,339
Cash Surrender Value of Life Insurance	$ 11,210		$ 18,857
Executive Officer [Member]
Deferred Compensation Arrangement with Individual, Requisite Service Period (Year)	5 years
Deferred Compensation Liability, Current and Noncurrent, Total	$ 8,500
Cash Surrender Value of Life Insurance	$ 11,200

X

- Definition

Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

+ References

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