Operations In Foreign Currency (Summary Of Currency Exchange Rates) (Details)	Mar. 31, 2013	Dec. 31, 2012
Australian Dollar [Member]
Intercompany Foreign Currency Balance [Line Items]
Currency exchange rates	1.0409	1.0393
New Zealand Dollar [Member]
Intercompany Foreign Currency Balance [Line Items]
Currency exchange rates	0.8360	0.8267

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-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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