Subsequent Events (Details Textual) (USD $) In Thousands, unless otherwise specified	9 Months Ended			1 Months Ended
	Sep. 30, 2014 Properties	Sep. 30, 2013 Properties	Sep. 30, 2014 Non Core [Member] Properties	Nov. 07, 2014 Non Core [Member] Discontinued Operations [Member] Properties	Nov. 07, 2014 Retail [Member] Discontinued Operations [Member] Properties
Subsequent Event [Line Items]
Number Of Disposed Assets	249	304	236	2	1
Discontinued Operation, Gross Disposition Price	$ 1,476,500	$ 1,815,900		$ 16,385	$ 16,850