Equity - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended		3 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended					3 Months Ended
	Mar. 31, 2013 Property Person	Mar. 31, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Partnership Interest	Mar. 31, 2011 Edwards Theatres	Mar. 31, 2013 Edwards Theatres	Oct. 31, 2012 West Broad Village	Mar. 31, 2013 Common Stock	Mar. 31, 2012 Common Stock	Mar. 31, 2013 Common Stock	Mar. 31, 2013 Stock Compensation Plan	Mar. 31, 2013 Hundred Percentage Employee Deferrals	Mar. 31, 2013 Fifty Percentage Employee Deferrals	Mar. 31, 2013 Issuance of Equity	Mar. 31, 2013 7.00% Series A cumulative convertible perpetual preferred stock	Dec. 31, 2012 7.00% Series A cumulative convertible perpetual preferred stock	Mar. 31, 2013 8.125% Series B cumulative redeemable preferred stock	Dec. 31, 2012 8.125% Series B cumulative redeemable preferred stock
Equity [Line Items]
Issuance of restricted common stock awards, shares			1,141,542						41,500	5,000
Forfeitures of restricted common stock awards, shares											3,000
Preferred stock dividend rate percentage	7.00%															7.00%		8.125%
Preferred stock, liquidation preference per share																$ 25.00	$ 25.00	$ 25.00	$ 25.00
Annual dividend on preferred stock																$ 1.75		$ 2.03125
Outstanding shares																2,000,000	2,000,000	3,680,000	3,680,000
Preferred stock conversion rate	1.6667		1.6667
Preferred stock conversion price per share, initial	$ 15.00
Closing price of common stock as minimum percentage of conversion price for conversion of preferred stock	140.00%
Minimum trading days for calculating closing price of common stock	20 days
Number of consecutive trading days	30 days		30 days
Series B preferred stock redeemable price on and after January 31, 2017																		$ 25.00
Number of days to redeem the Series B preferred stock, in whole or in part																		120 days
Stock repurchase program, authorized amount	$ 30,000,000
Stock repurchase program, remaining amount	23,300,000
Common stock offering price		50,000,000
Initial public offering shares	2,063,828								2,063,828						801,300
Net proceeds of Equity Distribution Agreements	25,600,000
Average stock issuance of Equity Distribution Agreements	$ 12.63
Number of sales agents	4
Net proceeds from issuance of shares	25,610,000														10,700,000
Shares issued, average stock issuance price															$ 13.60
Exchange of common stock and partnership interests					641,062
Number of OP units issued in connection with acquisition						764,343	591,474	411,184
Issuance of additional shares of common stock	531,768		531,768
Cash payments for number of OP Units issued	1,900,000		1,900,000
Formation transaction interest in properties	4
Maximum number of shares issued under equity incentive award plan	1,350,000		1,350,000
Common stock available for issuance												208,458
Compensation expense recognized	562,000	785,000
Estimated forfeitures	0
Unrecognized compensation expense	3,400,000		3,400,000	3,400,000
Unrecognized compensation expense, weighted-average	1 year 10 months 24 days
Company matching contributions Percentage													100.00%	50.00%
Eligible Compensation Percentage													3.00%	2.00%
Costs related to the matching portion	$ 36,000	$ 27,000