Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill [Abstract]

Changes In The Carrying Amount Of Goodwill By Geographic Reporting Unit

(in thousands)	Americas		EMEA		Asia Pacific		Total
Balance at December 31, 2015	$	—	$	150,521	$	37,354	$	187,875
Acquisitions and adjustments		—		(137)		189		52
Effect of foreign currency exchange rates		—		(5,413)		(1,284)		(6,697)
Balance at December 31, 2016		—		144,971		36,259		181,230
Acquisitions and adjustments		—		31,438		41		31,479
Effect of foreign currency exchange rates		—		15,539		2,634		18,173
Balance at December 31, 2017	$	—	$	191,948	$	38,934	$	230,882