Intangible Assets - Goodwill (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($)
Goodwill
Goodwill gross, beginning balance	$ 949,936
Accumulated impairment loss, beginning balance	(197,344)
Goodwill net, beginning balance	752,592
Foreign currency translation adjustments	(28,480)
Goodwill gross, ending balance	921,456
Accumulated impairment loss, ending balance	(197,343)
Goodwill net, ending balance	724,113
North America
Goodwill
Goodwill gross, beginning balance	561,513
Accumulated impairment loss, beginning balance	(7,303)
Goodwill net, beginning balance	554,210
Foreign currency translation adjustments	(8,579)
Goodwill gross, ending balance	552,934
Accumulated impairment loss, ending balance	(7,302)
Goodwill net, ending balance	545,632
Europe & Africa
Goodwill
Goodwill gross, beginning balance	236,992
Accumulated impairment loss, beginning balance	(50,003)
Goodwill net, beginning balance	186,989
Foreign currency translation adjustments	(18,484)
Goodwill gross, ending balance	218,508
Accumulated impairment loss, ending balance	(50,003)
Goodwill net, ending balance	168,505
Australia & New Zealand
Goodwill
Goodwill gross, beginning balance	151,431
Accumulated impairment loss, beginning balance	(140,038)
Goodwill net, beginning balance	11,393
Foreign currency translation adjustments	(1,417)
Goodwill gross, ending balance	150,014
Accumulated impairment loss, ending balance	(140,038)
Goodwill net, ending balance	$ 9,976

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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