Goodwill And Other Intangible Assets (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Business Combinations [Line Items]
Purchase price paid	$ 2,700
Goodwill	$ 500
Minimum [Member] | Customer Relationships [Member]
Goodwill And Other Intangible Assets [Line Items]
Estimated useful life	10 years
Minimum [Member] | Purchased Software Costs [Member]
Goodwill And Other Intangible Assets [Line Items]
Estimated useful life	2 years
Maximum [Member] | Customer Relationships [Member]
Goodwill And Other Intangible Assets [Line Items]
Estimated useful life	14 years
Maximum [Member] | Purchased Software Costs [Member]
Goodwill And Other Intangible Assets [Line Items]
Estimated useful life	10 years