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Pension Plans (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) plan	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) plan	Sep. 30, 2020 USD ($)
Retirement Benefits [Abstract]
Number of defined benefit plans | plan	2		2
Net periodic pension cost (income)	$ 158,000	$ 186,000	$ 475,000	$ 617,000
Contributions to plan			0
Expected contributions to plan	$ 0		$ 0

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

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