Segment Information - Summary of Revenues and Long-lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 941,422	$ 984,199	$ 1,000,006	$ 1,049,361	$ 923,928	$ 970,283	$ 984,376	$ 988,369	$ 3,974,988	$ 3,866,956	$ 3,598,484
Long-lived assets	641,722				790,372				641,722	790,372
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue									1,306,450	1,346,895	1,340,893
Long-lived assets	622,034				773,739				622,034	773,739
Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue									913,245	928,533	777,406
Long-lived assets	1,594				3,735				1,594	3,735
APAC
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue									822,679	820,711	715,740
Long-lived assets	11,521				7,254				11,521	7,254
All Other
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue									932,614	770,817	$ 764,445
Long-lived assets	$ 6,573				$ 5,644				$ 6,573	$ 5,644