Income Taxes (Summary Of A Reconciliation Of The Beginning And Ending Amount Of Gross Unrecognized Tax Benefits ("UTB")) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross UTB balance at beginning of year	$ 2,461	$ 1,757
Additions based on tax positions related to the current year	167	139
Additions for tax positions of prior years	14	603
Reductions for tax positions of prior years	(100)	(38)
Reductions due to lapse of applicable statute of limitations	0	0
Gross UTB balance at end of year	2,542	2,461
Net UTB balance at end of year	$ 477	$ 159