Goodwill And Intangible Assets, Net (Schedule Of Intangible Assets Categories) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets remaining amortization, Weighted Average Remaining Years	5 years
Intangible assets remaining amortization, Amount	$ 26,433	$ 28,727
Customer Lists and Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets remaining amortization, Weighted Average Remaining Years	5 years 4 months 24 days
Intangible assets remaining amortization, Amount	$ 22,254
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets remaining amortization, Weighted Average Remaining Years	3 years 4 months 24 days
Intangible assets remaining amortization, Amount	$ 2,311
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets remaining amortization, Weighted Average Remaining Years	2 years 9 months 18 days
Intangible assets remaining amortization, Amount	$ 1,868