Defined Benefit Plans (Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 42	$ 33
Interest cost	46	40
Expected return on plan assets	(59)	(57)
Amortization of net loss (gain)	(2)	(49)
Net periodic benefit expense (income)	27	(33)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	1
Interest cost	17	2
Accretion of prior service cost	(5)	(5)
Amortization of net loss (gain)	4
Net periodic benefit expense (income)	$ 20	$ (2)