Discontinued Operations (Summary) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended			1 Months Ended	3 Months Ended	1 Months Ended			12 Months Ended				1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended		3 Months Ended	1 Months Ended	3 Months Ended		1 Months Ended		3 Months Ended		12 Months Ended
	Jun. 30, 2013	Dec. 31, 2013 Properties	Dec. 31, 2012 Properties	Dec. 31, 2011	Aug. 31, 2013 Georgia Square, Panama City, and Rivergate [Member] Properties	Sep. 30, 2013 Georgia Square, Panama City, and Rivergate [Member]	Mar. 31, 2013 1500 Sunday Drive [Member]	Mar. 31, 2013 Peninsula I and II [Member]	Jan. 31, 2013 Lake Point and SunTrust [Member]	Dec. 31, 2013 706 and 708 Green Valley Road [Member]	Dec. 31, 2013 Various [Member]	Dec. 31, 2012 Various [Member]	Dec. 31, 2011 Various [Member]	Dec. 31, 2012 Willowbrook Plaza [Member]	Sep. 30, 2012 Willowbrook Plaza [Member]	Oct. 31, 2012 Towne Mall [Member]	Sep. 30, 2012 Towne Mall [Member]	Oct. 31, 2012 Hickory Hollow Mall [Member]	Sep. 30, 2012 Hickory Hollow Mall [Member]	Jul. 31, 2012 Massard Crossing [Member]	Mar. 31, 2012 Settlers Ridge Phase II [Member]	Jun. 30, 2011 Settlers Ridge Phase II [Member]	Jan. 31, 2012 Oak Hollow Square [Member]	Mar. 31, 2012 Oak Hollow Square [Member]	Dec. 31, 2011 Oak Hollow Square [Member]	Nov. 30, 2011 Westridge Square [Member]	Feb. 28, 2011 Oak Hollow Mall [Member]	Mar. 31, 2011 Oak Hollow Mall [Member]	Jun. 30, 2010 Oak Hollow Mall [Member]	Dec. 31, 2011 Settler's Ridge - Phase I [Member]	Dec. 31, 2011 Pemberton Square [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operation, Sales Price, Gross		$ 220,425	$ 67,594	$ 35,125	$ 176,000		$ 8,300	$ 5,250	$ 30,875					$ 24,450		$ 950		$ 1,000		$ 7,803	$ 19,144		$ 14,247			$ 26,125	$ 9,000
Discontinued operation, Sales Price, Net		215,450	66,208	34,615	171,977		7,862	5,121	30,490					24,171		892		966		7,432	18,951		13,796			25,768	8,847
Discontinued operation, Gain/(Loss)		1,144	938	(1)	(19)	(5,234)	(549)	598	823	281	10	(33)	47	0	(17,743)	(3)	(419)	(6)	(8,047)	98	883	(4,457)	(1)	(255)	(729)	(160)	6	(2,746)	(25,435)	67	39
Number of properties sold		2	2		6
Retirement of non-recourse loan and accrued interest																											40,281
Gain on extinguishment of debt	$ 9,108																											$ 31,434