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Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Beginning of year	$ 9,360	$ 8,937	$ 4,211
Increase resulting from prior year tax position	5,855	0	0
Increase resulting from current year tax position	758	751	4,726
Settlements with taxing authorities	(736)	0	0
Lapsing of statutes of limitations	(209)	(328)	0
End of year	$ 15,028	$ 9,360	$ 8,937

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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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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