Segment Information (Schedule Of Revenue And Long-Lived Assets, By Geographical Areas) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 2,734,372	$ 2,372,178	$ 2,463,701
Long-lived assets	1,613,243	1,543,258	1,526,276
United States
Segment Reporting Information [Line Items]
Revenues	2,532,720	2,144,105	2,191,560
Long-lived assets	1,583,766	1,506,862	1,487,591
Mexico
Segment Reporting Information [Line Items]
Revenues	156,405	149,438	197,470
Long-lived assets	29,421	36,222	38,428
Other
Segment Reporting Information [Line Items]
Revenues	45,247	78,635	74,671
Long-lived assets	56	174	257
Total Foreign Countries [Member]
Segment Reporting Information [Line Items]
Revenues	201,652	228,073	272,141
Long-lived assets	$ 29,477	$ 36,396	$ 38,685