Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 647,077	$ 433,374	$ 421,563
Other intangible assets, net	870,517	347,212
Total goodwill and other intangible assets, net	$ 1,517,594	$ 780,586