Segment Information - Revenue Classified by Major Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 234,770	$ 251,770
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	220,805	243,399
Europe/Middle East
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	12,367	7,669
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,598	$ 702