Goodwill and Intangible Assets, Net - Estimated Useful Life of Intangible Assets (Details)	6 Months Ended
	Jun. 30, 2018
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years
Technology
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years