Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Business Combination, Contingent Consideration, Reconciliation of Change in Liability [Roll Forward]
Balance at beginning of period	$ 7,302
Payments	(1)
Accretion	201
Net foreign currency translation adjustment	(82)
Balance at end of the period	7,420
Less current portion in accrued expenses and other current liabilities	(39)
Total long-term portion in other long-term liabilities	7,381
Contingent consideration, total remaining estimated payments	$ 9,100