Description of Business and Summary of Significant Accounting Policies Description of Business and Summary of Significant Accounting Policies - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 946,685	$ 666,863
Goodwill	17,931	317,410
Goodwill, purchase accounting adjustments	(741)	11,080
Goodwill, Foreign Currency Translation Gain (Loss)	(12,953)	(26,508)
Goodwill, ending balance	$ 952,404	$ 946,685