Income Taxes (Summary Of The Activity Related To Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Unrecognized tax benefits – gross beginning balance	$ 4,709	$ 3,123	$ 11,480
Gross increase (decrease) - prior year tax positions	(148)	2,304	(7,905)
Settlements	(479)	(718)	(452)
Unrecognized tax benefits – gross ending balance	$ 4,082	$ 4,709	$ 3,123