Indebtedness - Additional Information (Detail) (USD $)	1 Months Ended													1 Months Ended
	May 31, 2013 Subsequent Event	Jun. 20, 2013 Subsequent Event Operating Partnership	May 13, 2013 Subsequent Event Operating Partnership	May 31, 2013 Subsequent Event Virginia Natural Gas	May 31, 2013 Subsequent Event Gainsborough Square	May 31, 2013 Subsequent Event Broad Creek Shopping Center Notes 2	May 13, 2013 Minimum Subsequent Event Operating Partnership	May 13, 2013 Maximum Subsequent Event Operating Partnership	Mar. 25, 2013 Predecessor Main Street Land	Jan. 02, 2013 Predecessor Main Street Land	Jan. 03, 2013 Predecessor Main Street Land	Jan. 16, 2013 Predecessor Virginia Natural Gas	Jan. 15, 2013 Predecessor Virginia Natural Gas	Feb. 18, 2013 Predecessor Gainsborough Square	Feb. 19, 2013 Predecessor Gainsborough Square	Apr. 15, 2013 Predecessor Subsequent Event Broad Creek Shopping Center Notes 2
Proforma Debt Instrument [Line Items]
Debt instrument maturity date									Jul. 03, 2013	Jan. 05, 2013	Apr. 03, 2013			Dec. 28, 2013	Jan. 28, 2014
Stated interest rate, prime rate basis spread on variable rate												3.00%	4.00%
Debt instrument, additional borrowed amount																$ 2,700,000
Repayment of debt	147,264,000			5,457,000	9,732,000	2,700,000
Revolving credit facility, borrowed amount			40,000,000
Revolving credit facility, repayment of debt		$ 15,000,000
Revolving credit facility, interest rate description							LIBOR plus 1.60%	LIBOR plus 2.20%
Revolving credit facility, percentage added to LIBOR							1.60%	2.20%