Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Business Combination, Contingent Consideration, Reconciliation of Change in Liability [Roll Forward]
Balance at beginning of period	$ 4,396
Acquisitions	2,796
Payments	(3)
Accretion	237
Fair value adjustments	30
Net foreign currency translation adjustment	(123)
Balance at end of the period	7,333
Less current portion in accrued expenses and other current liabilities	(5,244)
Total long-term portion in other long-term liabilities	2,089
Contingent consideration, total remaining estimated payments	$ 8,700