Income Taxes (Schedule Of Company's Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of period	$ 4,307	$ 4,971
Changes for tax positions of current year	10	34
Settlement	0	(698)
Balance, end of period	$ 4,317	$ 4,307