Mortgages Payable Net (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended
	Apr. 30, 2013	Mar. 31, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		$ 332,160		$ 333,310
Less: premium		572	[1]	625	[1]
Mortgage notes payable, net		332,732		333,935
Maturity date		Jul. 19, 2016
Westwood Village
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		50,000	[2]	50,000	[2]
Contractual Interest Rate		2.69%	[2]
Effective Interest Rate		2.69%	[2]
Monthly Payment		112	[2],[3]
Maturity Date		2013	[2]
Maturity date		May 01, 2020
Five Forks Place
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		4,833		4,882
Contractual Interest Rate		5.50%
Effective Interest Rate		5.50%
Monthly Payment		39	[3]
Maturity Date	2013	2013
Grant Creek Town Center
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		15,247		15,342
Contractual Interest Rate		5.75%
Effective Interest Rate		5.75%
Monthly Payment		105	[3]
Maturity Date		2013
Park West Place
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		55,800	[4]	55,800	[4]
Contractual Interest Rate		2.50%	[4]
Effective Interest Rate		3.66%	[4]
Monthly Payment		120	[3],[4]
Maturity Date		2013	[4]
Red Rock Commons
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		13,884	[5]	13,800	[5]
Contractual Interest Rate		1.86%	[5]
Effective Interest Rate		1.86%	[5]
Monthly Payment		29	[3],[5]
Maturity Date		2014	[5]
Maturity date		Mar. 31, 2015
Excel Centre
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		12,216		12,284
Contractual Interest Rate		6.08%
Effective Interest Rate		6.08%
Monthly Payment		85	[3]
Maturity Date		2014
Merchant Central
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		4,443		4,468
Contractual Interest Rate		5.94%
Effective Interest Rate		6.75%
Monthly Payment		30	[3]
Maturity Date		2014
Edwards Theatres
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		11,774		11,859
Contractual Interest Rate		6.74%
Effective Interest Rate		5.50%
Monthly Payment		95	[3]
Maturity Date		2014
Gilroy Crossing
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		46,439		46,646
Contractual Interest Rate		5.01%
Effective Interest Rate		5.01%
Monthly Payment		263	[3]
Maturity Date		2014
Promenade Corporate Center
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		49,266		49,703
Contractual Interest Rate		4.80%
Effective Interest Rate		4.80%
Monthly Payment		344	[3]
Maturity Date		2015
5000 South Hulen
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		13,598		13,655
Contractual Interest Rate		5.60%
Effective Interest Rate		6.90%
Monthly Payment		83	[3]
Maturity Date		2017
Lake Pleasant Pavilion
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		28,092		28,176
Contractual Interest Rate		6.09%
Effective Interest Rate		5.00%
Monthly Payment		143	[3]
Maturity Date		2017
Rite Aid - Vestavia Hills
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		1,143		1,184
Contractual Interest Rate		7.25%
Effective Interest Rate		7.25%
Monthly Payment		21	[3]
Maturity Date		2018
Lowe's, Shippensburg
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		13,425		13,511
Contractual Interest Rate		7.20%
Effective Interest Rate		7.20%
Monthly Payment		110	[3]
Maturity Date		2031
Northside Mall
Debt Instrument [Line Items]
Carrying Amount of Mortgage Notes		12,000	[6]	12,000	[6]
Contractual Interest Rate		0.13%	[6]
Effective Interest Rate		1.13%	[6]
Monthly Payment		$ 1	[3],[6]
Maturity Date		2035	[6]

[1] Represents (a) the fair value adjustment on assumed debt on acquired properties at the time of acquisition to account for below- or above-market interest rates and (b) an underwriter's discount for the issuance of redevelopment bonds.

[2] The loan at the West Broad Village property was refinanced and the maturity date extended subsequent to May 1, 2020; see Note 18 for further discussion.

[3] Amount represents the monthly payment of principal and interest at March 31, 2013.

[4] The loan bears interest at a rate of LIBOR plus 2.25% (variable interest rate of 2.50% at March 31, 2013). In December 2010, the Company entered into interest rate swap contracts, which fix LIBOR at an average of 1.41% for the term of the loan. The maturity date may be extended for an additional one-year period through December 2014 at the Company's option and upon the satisfaction of conditions precedent and the payment of an extension fee.

[5] The maturity date for the Red Rock Commons construction loan was extended to March 2014 and may be extended for an additional one-year period through March 2015 at the Company's option and upon the satisfaction of conditions precedent and the payment of an extension fee. The construction loan bears interest at the rate of LIBOR plus a margin of 165 basis points to 225 basis points, depending on the Company's leverage ratio (variable interest rate of 1.86% at March 31, 2013).

[6] The debt represents redevelopment revenue bonds to be used for the redevelopment of this property, which mature in November 2035. Interest is reset weekly and determined by the bond remarketing agent based on the market value of the bonds (interest rate of 0.13% at March 31, 2013). The interest rate on the bonds is currently priced off of the Securities Industry and Financial Markets Association index but could change based on the credit of the bonds. The bonds are secured by a $12.1 million letter of credit issued by the Company from the Company's unsecured revolving credit facility. An underwriter's discount related to the original issuance of the bonds with a remaining balance of $108,000 at March 31, 2013 will be amortized as additional interest expense through November 2035.