Income Taxes (Schedule Of Accrued Liability For Unrecognized Tax Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits at beginning of year	$ 1,278	$ 1,312
Gross increases – tax positions in prior period	0	40
Gross decreases – tax positions in prior period	1	0
Gross increases – current-period tax positions	269	272
Lapse of statute of limitations	(318)	(346)
Unrecognized tax benefits at end of year	$ 1,228	$ 1,278