Disaggregation of Revenue (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
Disaggregation of Revenue [Line Items]
Revenue	$ 1,775,589	$ 1,825,345	$ 1,810,706	$ 1,724,757	$ 1,808,950	$ 1,747,403	$ 1,798,094	$ 1,637,671
United States
Disaggregation of Revenue [Line Items]
Revenue									$ 3,806,033	$ 3,619,717	$ 3,654,102
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue									1,571,901	1,572,788	1,476,686
Asia [Member]
Disaggregation of Revenue [Line Items]
Revenue									863,050	867,268	754,845
Other Americas [Member]
Disaggregation of Revenue [Line Items]
Revenue									625,707	631,164	621,831
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue									$ 269,706	$ 301,181	$ 313,422