Summary of Repayment of Debt (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	$ 149,961
Armada Hoffler Tower
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	38,813
Richmond Tower
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	46,523
Two Columbus
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	18,785
Virginia Natural Gas
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	5,457
Sentara Williamsburg
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	10,915
North Point | Notes 3
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	9,242
Gainsborough Square
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	9,732
Parkway Marketplace
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	5,669
Courthouse 7-Eleven | Notes 1
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	1,485
Unencumbered
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	146,621
Broad Creek Shopping Center | Notes 2
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	2,697
Oyster Point
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	643
Other Financing Obligations Repayments
Scheduled Principal Payments For Borrowings [Line Items]
Repayment of debt	$ 3,340