Pension Plans (Narrative) (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2023 USD ($) plan	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) plan	Sep. 30, 2022 USD ($)
Retirement Benefits [Abstract]
Number of defined benefit plans | plan	2			2
Net periodic pension cost (income)	$ 51,000		$ 51,000	$ 152,000	$ 153,000
Contributions to plan				0
Expected contributions to plan	$ 0			$ 0
Termination cost, estimate		$ 2,400,000