Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Business Combination, Contingent Consideration, Reconciliation of Change in Liability [Roll Forward]
Balance at beginning of period	$ 4,609
Acquisitions	5,000
Payments	(3,183)
Accretion	173
Fair value adjustments	394
Net foreign currency translation adjustment	(141)
Balance at end of the period	6,852
Less current portion in accrued expenses and other current liabilities	(5,006)
Total long-term portion in other long-term liabilities	1,846
Contingent consideration, total remaining estimated payments	$ 8,400