Income Taxes (Reconciliation Of Unrecognized Tax Benefits Table) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns
Unrecognized tax benefits at beginning of period:	$ 619	$ 582
Increases based on tax positions for prior periods	0	37
Decreases based on tax positions for prior periods	(20)	0
Balance at end of period	599	619
Unrecognized tax benefit that would impact effective tax rate	599
Accrued interest and tax penalties	$ 500	$ 464
IRS
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns
Open tax year	2013