Income Taxes (Schedule Of Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Balances as of January 1	$ 708	$ 7,791	$ 13,114
Additions related to current year tax positiions	137	220	0
Decreases as a result of a lapse of applicable statute of limitations in current year	0	0	5,079
Additions related to prior year tax positions	0	894	89
Decreases related to prior year tax positions	(532)	(8,197)	(333)
Balance as of December 31	$ 313	$ 708	$ 7,791

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Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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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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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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