Income Taxes (Summary Of Activity In Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of period	$ 30,558	$ 30,656	$ 29,956
Additions based on tax positions related to prior years	2,500	1,899	5,576
Reductions based on tax positions related to prior years		(1,864)	(4,671)
Reductions as a result of a lapse of the applicable statute of limitations		(133)	(205)
Reductions relating to settlements with taxing authorities	(19,852)
Unrecognized tax benefits at end of period	$ 13,206	$ 30,558	$ 30,656

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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