Pension Plans (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) plan	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) plan	Sep. 30, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans | plan	2		2
Net periodic pension cost (income)	$ 244,000	$ 136,000	$ 732,000	$ 408,000
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension cost (income)	289,000	$ 58,000	690,000	$ 174,000
Contributions to plan			0
Expected contributions to plan	$ 0		$ 0