Other Current and Long-Term Assets (Schedule Of Other Long-term Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Other Assets, Noncurrent [Abstract]
Contract assets, net	$ 159,196	$ 148,971
Customer acquisition costs	110,996	107,205
Deferred income taxes	68,969	55,215
Equity investments	30,250	30,250
Investment in long-term product supply arrangements	24,083	25,250
Deferred sales commissions	12,795	12,718
Other assets	42,107	38,120
Other long-term assets	$ 448,396	$ 417,729