Real Estate Investments (Details) (USD $)				12 Months Ended													12 Months Ended			12 Months Ended						0 Months Ended	12 Months Ended
	Dec. 31, 2013 Macquarie Country Wide - Regency III, LLC [Member]	Mar. 20, 2013 Macquarie Country Wide - Regency III, LLC [Member]	Dec. 31, 2012 Macquarie Country Wide - Regency III, LLC [Member]	Dec. 31, 2013 Wholly Owned Properties [Member]	Dec. 31, 2012 Wholly Owned Properties [Member]	Dec. 31, 2011 Wholly Owned Properties [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Shops on Main [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Juanita Tate Marketplace [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Preston Oaks [Member] [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Southpark at Cinco Ranch [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Fontainebleau Square [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Holly Park [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Shoppes on Riverside [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Fellsway Plaza [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Glen Gate [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Shops at Erwin Mill - Operating Component [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Grand Ridge Plaza [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Grand Ridge Plaza [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Grand Ridge Plaza - Operating Component [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Balboa Mesa Shopping Center [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Sandy Springs [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Uptown District [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] South Bay Village [Member]	Dec. 31, 2013 Wholly Owned Properties [Member] Shops at Erwin Mill [Member]	Dec. 31, 2012 Wholly Owned Properties [Member] Shops at Erwin Mill [Member]	Mar. 20, 2013 Consolidated Entities [Member] Hilltop Village [Member]	Dec. 31, 2013 Consolidated Entities [Member] Hilltop Village [Member]	Dec. 31, 2013 Unconsolidated Properties [Member]	Dec. 31, 2012 Unconsolidated Properties [Member]	Dec. 31, 2011 Unconsolidated Properties [Member]	Dec. 31, 2013 Fixed Rate Mortgage Loans [Member] Consolidated Entities [Member] Hilltop Village [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition							Jan. 16, 2013	May 16, 2013	May 30, 2013	Feb. 03, 2012	Jul. 22, 2013	Dec. 27, 2013	Oct. 24, 2013	Oct. 16, 2013	Oct. 07, 2013			Jun. 21, 2012		Aug. 31, 2012	Dec. 21, 2012	Dec. 27, 2012	Feb. 06, 2012		May 31, 2012
Business Acquisition, Name of Acquired Entity							Shops on Main	Juanita Tate Marketplace	Preston Oaks	Southpark at Cinco Ranch	Fontainebleau Square	Holly Park	Shoppes on Riverside	Fellsway Plaza	Glen Gate		Grand Ridge Plaza	Grand Ridge Plaza		Balboa Mesa Shopping Center	Sandy Springs	Uptown District	South Bay Village	Shops at Erwin Mill	Shops at Erwin Mill
Real estate received through foreclosure on notes receivable																							$ 12,585,000
Business Acquisition Location, City and State							Schererville, IN	Los Angeles, CA	Dallas, TX	Katy, TX	Miami, FL	Raleigh, NC	Jacksonville, FL	Medford, MA	Glenview, IL			Issaquah, WA		San Diego, CA	Sandy Springs, GA	San Diego, CA	Torrance, CA		Durham, NC
Business Acquisition, Property type							Development	Development	Operating	Development	Development	Operating	Development	Operating	Development			-4		Operating	Operating	Operating	Development		-3
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds				140,127,000	230,237,000		85,000	1,100,000	27,000,000	13,009,000	17,092,000	33,900,000	3,500,000	42,500,000	14,950,000	358,000		20,000,000	11,761,000	59,500,000	35,250,000	81,115,000	15,600,000		5,800,000
Noncash or Part Noncash Acquisition, Debt Assumed				0	30,467,000		0	0	0	0	0	0	0	0	0			12,810,000		0	17,657,000	0	0		0						7,500,000
Acquired Finite-lived Intangible Asset, Amount				11,681,000	20,651,000		0	0	3,396,000	0	0	3,146,000	0	5,139,000	0			2,346,000		9,711,000	2,761,000	5,833,000	0		0
Acquired Finite Lived Intangible Liability Amount				10,086,000	9,661,000		0	0	7,597,000	0	0	1,526,000	0	963,000	0			144,000		6,977,000	1,386,000	1,154,000	0		0
Accrual for Environmental Loss Contingencies				1,536,000	4,263,000		0	0	0	0	0	300,000	0	600,000	636,000			0		145,000	60,000	4,058,000	0		0
Equity Method Investment, Ownership Percentage	0.00%	24.95%	0.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest				100.00%	100.00%	100.00%																				100.00%		100.00%	100.00%	100.00%
Equity Method Investment Sold, Carrying Amount																											$ 7,600,000