Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jul. 27, 2017
Finite-Lived Intangible Assets [Line Items]
Impact of foreign exchange rates on intangible assets	$ 53,800
Amortization expense of intangible assets	$ 158,897	$ 112,455
NexTraq | Held-for-sale
Finite-Lived Intangible Assets [Line Items]
Disposal group intangible assets			$ 41,800