Property And Equipment (Summary Of Investment And Development Property) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Investment and development property	$ 76,698	$ 94,922
Land [Member]
Property, Plant and Equipment [Line Items]
Investment and development property	61,983	77,020
Construction-In-Progress (Including Capitalized Interest) [Member]
Property, Plant and Equipment [Line Items]
Investment and development property	$ 14,715	$ 17,902