Segment Information (Revenues by geographic region) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenues, net	$ 771,392	$ 646,291	$ 1,463,133	$ 1,380,666
United States
Segment Reporting Information [Line Items]
Revenues, net	612,326	523,395	1,189,474	1,148,388
Europe
Segment Reporting Information [Line Items]
Revenues, net	119,555	91,836	201,591	164,315
Other
Segment Reporting Information [Line Items]
Revenues, net	$ 39,511	$ 31,060	$ 72,068	$ 67,963