Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		12 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
	Mar. 31, 2013 Property	Mar. 31, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012 Restatement Adjustment	Mar. 31, 2012 Scenario, Previously Reported	Dec. 31, 2012 California Real Estate Geographic Concentration Risk	Mar. 31, 2013 California Real Estate Geographic Concentration Risk	Mar. 31, 2012 California Real Estate Geographic Concentration Risk	Dec. 31, 2012 Arizona Real Estate Geographic Concentration Risk	Mar. 31, 2013 Arizona Real Estate Geographic Concentration Risk	Mar. 31, 2012 Arizona Real Estate Geographic Concentration Risk	Dec. 31, 2012 Richmond, Virginia Real Estate Geographic Concentration Risk	Mar. 31, 2013 Richmond, Virginia Real Estate Geographic Concentration Risk	Mar. 31, 2013 Texas Real Estate Geographic Concentration Risk	Mar. 31, 2012 Texas Real Estate Geographic Concentration Risk	Mar. 31, 2012 Alabama Real Estate Geographic Concentration Risk	Oct. 31, 2012 West Broad Village	Mar. 31, 2013 Maximum	Mar. 31, 2011 Edwards Theatres property	Mar. 31, 2013 Edwards Theatres property
Summary Of Significant Accounting Policies [Line Items]
Highly liquid investments, maturity period																			3 months
Deferred rents	$ 4,100,000		$ 4,100,000	$ 4,400,000
Increase in Rental income	877,000	751,000
Straight-line rent adjustment	385,000	208,000
Allowances for uncollectible accounts	877,000		877,000	719,000
Bad debt expense	337,000	247,000
Number of properties on which interest is exchanged for OP units	4
OP units exchanged	641,062
OP units issued in connection with acquisition																				764,343
Number of OP units issued in connection with acquisition																		411,184
OP units tendered for redemption			591,474																		19,904
Common stock issued in connection with redemption shares			531,768																		22,074
OP units outstanding																					172,869
Consideration Per OP unit	14.00
Additional gains due to changes in fair value of financial instruments and gain on OP unit redemption	246,000	288,000
Loss on OP unit redemption	16,000
Guarantee by Federal deposit insurance corporation	250,000		250,000
Percentage of revenue	10.00%	10.00%
Concentration risk percentage							16.50%	22.10%		16.60%	18.30%		14.60%	16.10%
Concentration risk percentage of revenue								20.50%	29.20%		19.00%	21.70%		11.90%	11.00%	10.70%	10.30%
Net cash provided by operating activities	10,609,000	9,178,000			1,600,000	7,600,000
Net cash provided by financing activities	$ 27,071,000	$ 58,847,000			$ (1,600,000)	$ 60,400,000