Summary of Significant Accounting Policies (Schedule Of Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of Beginning of Year	[1]	$ 470	$ 514	$ 788
Charges to Operations	[1]	671	1,321	489
Deductions	[1]	(900)	(1,365)	(763)
Balance as of End of Year	[1]	$ 241	$ 470	$ 514

[1] Deductions in the allowance for doubtful accounts represent write-offs, net of recoveries, of amounts determined to be uncollectible.