Goodwill and Other Intangible Assets (Schedule Of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Beginning balance	$ 686,407	$ 701,980
Impairment charge		(25,062)
Goodwill written off related to spin-off of a business unit	(476)
Additions	33,214
Amortization of "second component" goodwill	(1,344)	(1,343)
Foreign currency translation	(8,457)	10,832
Ending balance	709,344	686,407
Domestic Operations
Goodwill [Roll Forward]
Beginning balance	333,502	334,845
Impairment charge		0
Goodwill written off related to spin-off of a business unit	0
Additions	21,312
Amortization of "second component" goodwill	(1,344)	(1,343)
Foreign currency translation	0	0
Ending balance	353,470	333,502
International and Other
Goodwill [Roll Forward]
Beginning balance	352,905	367,135
Impairment charge		(25,062)
Goodwill written off related to spin-off of a business unit	(476)
Additions	11,902
Amortization of "second component" goodwill	0	0
Foreign currency translation	(8,457)	10,832
Ending balance	$ 355,874	$ 352,905