Income Taxes (Schedule Of Accrued Liability For Unrecognized Tax Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits at beginning of year	$ 1,208	$ 1,228
Gross increases – tax positions in prior period	31	5
Gross increases – current-period tax positions	322	268
Lapse of statute of limitations	(304)	(293)
Unrecognized tax benefits at end of year	$ 1,257	$ 1,208