Summary Of Significant Accounting Policies (Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary Of Significant Accounting Policies [Abstract]
Beginning balance	$ 1,681	$ 889	$ 686
Provision for doubtful accounts	22,516	896	365
Write-offs, net of recoveries	(614)	(72)	(135)
Currency translation adjustment	935	(32)	(27)
Ending balance	$ 24,518	$ 1,681	$ 889