Notes Receivable From Real Estate Joint Ventures And Partnerships (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Contract	Sep. 30, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Number of outstanding notes receivable				0
Interest rate on notes receivable - range minimum						2.90%
Interest rate on notes receivable - range maximum						5.70%
Notes due through various dates						Jun. 30, 2017
Write-off of uncollectible notes receivable				$ 0
Interest income on notes receivable		0.02	0.50	0.10	1.80
Ownership percentage in joint ventures	50.00%					50.00%
Notes receivable settlement	$ 54.8