Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Business Combination, Contingent Consideration, Reconciliation of Change in Liability [Roll Forward]
Balance at beginning of period	$ 4,396
Acquisitions	2,796
Payments	(7)
Accretion	416
Fair value adjustments	(1,769)
Net foreign currency translation adjustment	11
Balance at end of the period	5,843
Less current portion in accrued expenses and other current liabilities	(3,898)
Total long-term portion in other long-term liabilities	1,945
Contingent consideration, total remaining estimated payments	$ 7,300