Summary Of Significant Accounting Policies (Foreign Currency Exchange Translation) (Narrative) (Details) - $ / €	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Trading Activity, Gains and Losses, Net [Line Items]
Exchange rate translation	1.122	1.144
Weighted Average [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Exchange rate translation	1.120	1.181	1.129

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

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Balance Type:	na
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