Employee Benefit Plan (Components of Net Periodic Benefit Cost for Plan) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Components of net periodic cost (income)
Interest cost	$ 33	$ 41	$ 99	$ 122
Expected return on plan assets	(54)	(53)	(161)	(159)
Amortization of prior service cost	1	1	3	3
Recognized net loss due to settlement		40		93
Recognized net actuarial loss	12	12	36	36
Net periodic (income) cost	$ (8)	$ 41	$ (23)	$ 95