Breakdown of Revenue and Non-Current Assets by Geographical Areas - Revenue by Geographical Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 1,799,146	$ 1,323,169	$ 988,249
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	730,873	505,653	303,436
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	660,523	541,105	485,986
Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 407,750	$ 276,411	$ 198,827