Income Taxes (Summary Of The Activity Related To Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Unrecognized tax benefits – gross beginning balance	$ 4,082	$ 4,709	$ 3,123
Gross increase (decrease) - prior year tax positions	(1,996)	(148)	2,304
Settlements		(479)	(718)
Unrecognized tax benefits – gross ending balance	$ 2,086	$ 4,082	$ 4,709