Real Estate Investments (Details) (USD $)	12 Months Ended		0 Months Ended
Real Estate Investments (Details) (USD $)	Dec. 31, 2014 property	Dec. 31, 2013	Mar. 20, 2013	Dec. 31, 2012
Macquarie Country Wide - Regency III, LLC [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage		0.00%	24.95%	0.00%
Fairfield Portfolio [Member]
Business Acquisition [Line Items]
Number of real estate properties acquired	3
Equity Method Investment, Ownership Percentage	80.00%
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	$ 15,400,000
East San Marco [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Payment to acquire business	5,200,000
Indian Springs [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	18,300,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	14,100,000
Fair Value Inputs, Cap Rate	6.07%
Fair Value Inputs, Long-term Revenue Growth Rate	3.00%
Fair Value Inputs, Discount Rate	7.00%
Wholly Owned Properties [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	282,728,000	140,127,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	103,187,000	0
Acquired Finite-lived Intangible Asset, Amount	20,532,000	11,681,000
Acquired Finite Lived Intangible Liability Amount	10,802,000	10,086,000
Wholly Owned Properties [Member] \| Shops on Main [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Jan. 16, 2013
Business Acquisition, Name of Acquired Entity		Shops on Main
Business Acquisition Location, City and State		Schererville, IN
Business Acquisition, Property type		Development
Payments to Acquire Businesses, Gross		85,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums		0
Acquired Finite-lived Intangible Asset, Amount		0
Acquired Finite Lived Intangible Liability Amount		0
Wholly Owned Properties [Member] \| Persimmon Place [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Jan. 31, 2014
Business Acquisition, Name of Acquired Entity	Persimmon Place
Business Acquisition Location, City and State	Dublin, CA
Business Acquisition, Property type	Development
Payments to Acquire Businesses, Gross	14,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	0
Acquired Finite-lived Intangible Asset, Amount	0
Acquired Finite Lived Intangible Liability Amount	0
Wholly Owned Properties [Member] \| Shops at Mira Vista [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Feb. 14, 2014
Business Acquisition, Name of Acquired Entity	Shops at Mira Vista
Business Acquisition Location, City and State	Austin, TX
Business Acquisition, Property type	Operating
Payments to Acquire Businesses, Gross	22,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	319,000
Acquired Finite-lived Intangible Asset, Amount	2,329,000
Acquired Finite Lived Intangible Liability Amount	291,000
Wholly Owned Properties [Member] \| Fairfield Portfolio [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Mar. 07, 2014
Business Acquisition, Name of Acquired Entity	Fairfield Portfolio (1)
Business Acquisition Location, City and State	Fairfield, CT
Business Acquisition, Property type	Operating
Payments to Acquire Businesses, Gross	149,344,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	77,730,000
Acquired Finite-lived Intangible Asset, Amount	12,650,000
Acquired Finite Lived Intangible Liability Amount	5,601,000
Wholly Owned Properties [Member] \| Willow Oaks Crossing [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Jun. 02, 2014
Business Acquisition, Name of Acquired Entity	Willow Oaks Crossing
Business Acquisition Location, City and State	Concord, NC
Business Acquisition, Property type	Development
Payments to Acquire Businesses, Gross	3,342,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	0
Acquired Finite-lived Intangible Asset, Amount	0
Acquired Finite Lived Intangible Liability Amount	0
Wholly Owned Properties [Member] \| Clybourn Commons [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Jul. 15, 2014
Business Acquisition, Name of Acquired Entity	Clybourn Commons
Business Acquisition Location, City and State	Chicago, IL
Business Acquisition, Property type	Operating
Payments to Acquire Businesses, Gross	19,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	0
Acquired Finite-lived Intangible Asset, Amount	1,686,000
Acquired Finite Lived Intangible Liability Amount	3,298,000
Wholly Owned Properties [Member] \| Belmont Chase [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Sep. 10, 2014
Business Acquisition, Name of Acquired Entity	Belmont Chase
Business Acquisition Location, City and State	Ashburn, VA
Business Acquisition, Property type	Development
Payments to Acquire Businesses, Gross	4,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	0
Acquired Finite-lived Intangible Asset, Amount	0
Acquired Finite Lived Intangible Liability Amount	0
Wholly Owned Properties [Member] \| City Line Market [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Sep. 19, 2014
Business Acquisition, Name of Acquired Entity	CityLine Market
Business Acquisition Location, City and State	Dallas, TX
Business Acquisition, Property type	Development
Payments to Acquire Businesses, Gross	4,913,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	0
Acquired Finite-lived Intangible Asset, Amount	0
Acquired Finite Lived Intangible Liability Amount	0
Wholly Owned Properties [Member] \| East San Marco [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Oct. 24, 2014
Business Acquisition, Name of Acquired Entity	East San Marco (2)
Business Acquisition Location, City and State	Jacksonville, FL
Business Acquisition, Property type	Development
Payments to Acquire Businesses, Gross	5,223,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	0
Acquired Finite-lived Intangible Asset, Amount	0
Acquired Finite Lived Intangible Liability Amount	0
Wholly Owned Properties [Member] \| Grand Ridge Plaza [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Jul. 22, 2013
Business Acquisition, Name of Acquired Entity		Fontainebleau Square
Business Acquisition Location, City and State		Miami, FL
Business Acquisition, Property type		Development
Payments to Acquire Businesses, Gross		17,092,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums		0
Acquired Finite-lived Intangible Asset, Amount		0
Acquired Finite Lived Intangible Liability Amount		0
Wholly Owned Properties [Member] \| Balboa Mesa Shopping Center [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Oct. 07, 2013
Business Acquisition, Name of Acquired Entity		Glen Gate
Business Acquisition Location, City and State		Glenview, IL
Business Acquisition, Property type		Development
Payments to Acquire Businesses, Gross		14,950,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums		0
Acquired Finite-lived Intangible Asset, Amount		0
Acquired Finite Lived Intangible Liability Amount		0
Wholly Owned Properties [Member] \| Sandy Springs [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Oct. 16, 2013
Business Acquisition, Name of Acquired Entity		Fellsway Plaza
Business Acquisition Location, City and State		Medford, MA
Business Acquisition, Property type		Operating
Payments to Acquire Businesses, Gross		42,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums		0
Acquired Finite-lived Intangible Asset, Amount		5,139,000
Acquired Finite Lived Intangible Liability Amount		963,000
Wholly Owned Properties [Member] \| Uptown District [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Oct. 24, 2013
Business Acquisition, Name of Acquired Entity		Shoppes on Riverside
Business Acquisition Location, City and State		Jacksonville, FL
Business Acquisition, Property type		Development
Payments to Acquire Businesses, Gross		3,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums		0
Acquired Finite-lived Intangible Asset, Amount		0
Acquired Finite Lived Intangible Liability Amount		0
Wholly Owned Properties [Member] \| South Bay Village [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		May 16, 2013
Business Acquisition, Name of Acquired Entity		Juanita Tate Marketplace
Business Acquisition Location, City and State		Los Angeles, CA
Business Acquisition, Property type		Development
Payments to Acquire Businesses, Gross		1,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums		0
Acquired Finite-lived Intangible Asset, Amount		0
Acquired Finite Lived Intangible Liability Amount		0
Wholly Owned Properties [Member] \| Shops at Erwin Mill [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		May 30, 2013
Business Acquisition, Name of Acquired Entity		Preston Oaks
Business Acquisition Location, City and State		Dallas, TX
Business Acquisition, Property type		Operating
Payments to Acquire Businesses, Gross		27,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums		0
Acquired Finite-lived Intangible Asset, Amount		3,396,000
Acquired Finite Lived Intangible Liability Amount		7,597,000
Wholly Owned Properties [Member] \| The Village at La Floresta [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Dec. 04, 2014
Business Acquisition, Name of Acquired Entity	The Village at La Floresta
Business Acquisition Location, City and State	Brea, CA
Business Acquisition, Property type	Development
Payments to Acquire Businesses, Gross	6,750,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	0
Acquired Finite-lived Intangible Asset, Amount	0
Acquired Finite Lived Intangible Liability Amount	0
Wholly Owned Properties [Member] \| Southpark at Cinco Ranch [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Dec. 27, 2013
Business Acquisition, Name of Acquired Entity		Holly Park
Business Acquisition Location, City and State		Raleigh, NC
Business Acquisition, Property type		Operating
Payments to Acquire Businesses, Gross		33,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums		0
Acquired Finite-lived Intangible Asset, Amount		3,146,000
Acquired Finite Lived Intangible Liability Amount		1,526,000
Wholly Owned Properties [Member] \| Indian Springs [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Dec. 16, 2014
Business Acquisition, Name of Acquired Entity	Indian Springs (3)
Business Acquisition Location, City and State	Houston, TX
Business Acquisition, Property type	Operating
Payments to Acquire Businesses, Gross	53,156,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt Assumed, Net of Premiums	25,138,000
Acquired Finite-lived Intangible Asset, Amount	3,867,000
Acquired Finite Lived Intangible Liability Amount	1,612,000
Consolidated Entities [Member] \| Hilltop Village [Member]
Business Acquisition [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest			100.00%
Equity Method Investment Sold, Carrying Amount		7,600,000
Fixed Rate Mortgage Loans [Member] \| Consolidated Entities [Member] \| Hilltop Village [Member]
Business Acquisition [Line Items]
Mortgage loans assumed for the acquisition of real estate		$ 7,500,000