Debt (Schedule Of Interest Information) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Debt Instrument [Line Items]
Interest incurred, including commitment fees		$ 173	$ 304
Deferred finance cost amortization		60	97
Other interest not related to debt	[1]	121	2
Interest expense, net		$ 354	$ 403
Various Debt Instruments [Member]
Debt Instrument [Line Items]
Average effective interest rate, excluding commitment fees		7.61%	6.75%

[1] The "Other interest not related to debt" line item includes interest income.