Segment and Geographic Information (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment	1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 29,697,844	$ 24,996,056	$ 20,156,447
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 12,100,000	$ 10,800,000	$ 9,500,000