Acquisitions and Dispositions (Summary of Allocation of Fair Value of Amounts Recognized) (Details) (Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Other Two Thousand Thirteen Acquisitions [Member] [Domain] [Member]
Real estate assets	$ 422,538
Lease related intangible assets	58,826
Total acquired assets	481,364
Secured debt	103,638
Below Market Lease, Gross	1,469
Other liabilities	1,448
Total assumed liabilities	106,555
Fair value of acquired assets	$ 374,809