Summary Of Significant Accounting Policies And Recent Accounting Pronouncements (Schedule Of Estimated Useful Lives) (Details) - Customer Relationships [Member]	12 Months Ended
	Dec. 31, 2019
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	5 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	8 years