Fair Value Of Financial Instruments (Schedule Of Assets And Liabilities Measured On A Recurring Basis) (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Cash Flow Hedge Derivative Instrument Assets at Fair Value	$ 559	$ 1,297
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	$ (219)	$ 0

Fair value of all liability derivatives designated as cash flow hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

Name:	us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant