Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) $ in Thousands	9 Months Ended
	Sep. 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	(9)
Accretion	591
Fair value adjustments	(1,885)
Net foreign currency translation adjustment	269
Balance at end of the period	6,158
Less current portion in accrued expenses and other current liabilities	(4,163)
Total long-term portion in other long-term liabilities	1,995
Contingent consideration, total remaining estimated payments	$ 7,300