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Note 18 - Post-retirement Benefits (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 1.2	$ 1.0	$ 3.7	$ 2.8
Executive Officer [Member]
Deferred Compensation Arrangement with Individual, Requisite Service Period (Year)			5 years

X

- Definition

Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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