Segment Reporting (Schedule Of Net Revenues Earned On Major Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Total net revenues	$ 1,045,051	$ 1,045,139	$ 3,202,565	$ 3,269,792
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues	979,282	987,770	2,982,274	3,085,241
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total net revenues	45,095	40,980	131,855	134,836
Canada [Member]
Segment Reporting Information [Line Items]
Total net revenues	8,364	7,798	37,195	21,182
Other [Member]
Segment Reporting Information [Line Items]
Total net revenues	$ 12,310	$ 8,591	$ 51,241	$ 28,533