Goodwill and Other Intangible Assets Goodwill Activity by Segment (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 287,332
Foreign currency translation	4,415
Goodwill, end of period	291,747
North America [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	178,746
Foreign currency translation	0
Goodwill, end of period	178,746
EMEA [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	92,063
Foreign currency translation	3,741
Goodwill, end of period	95,804
ROW [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	16,523
Foreign currency translation	674
Goodwill, end of period	$ 17,197