Other Current and Long-Term Assets (Schedule Of Other Long-term Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Other Assets, Noncurrent [Abstract]
Contract assets, net	$ 152,209	$ 148,971
Customer acquisition costs	107,971	107,205
Deferred income taxes	57,136	55,215
Equity investments	30,250	30,250
Investment in long-term product supply arrangements	24,021	25,250
Deferred sales commissions	12,765	12,718
Taxes receivable	1,548	717
Other assets	35,250	37,403
Other long-term assets	$ 421,150	$ 417,729