Benefit Plans (Net Periodic Pension Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 80	$ 65
Interest cost	241	262
Expected return on plan assets	(267)	(257)
Recognized net actuarial loss	(136)	(133)
Recognized actuarial loss due to settlements		106
Net periodic cost	$ 190	$ 309
Obligation	4.22%	3.61%
Expense	3.61%	4.09%
Expected long-term rate of return on assets	5.50%	5.50%
Estimated 2018 Net Periodic Benefit Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 82
Interest cost	248
Expected return on plan assets	(239)
Amortization of net loss	126
Net periodic cost	$ 217