Investments in Partnerships (Summary of Mortgage Loans Secured by Our Unconsolidated Properties) (Detail) (July 2012 [Member], Pavilion East [Member], USD $)	12 Months Ended
	Dec. 31, 2013
Partnership Mortgage Loan Activity [Line Items]
Property	Pavilion East	[1]
Amount Financed or Extended (in millions of dollars)	$ 9,400,000
Maturity	August 2017
LIBOR [Member]
Partnership Mortgage Loan Activity [Line Items]
Stated Interest Rate	2.75%

[1] The unconsolidated entity that owns Pavilion East entered into the mortgage loan. Our interest in the unconsolidated entity is 40%. The mortgage loan has a term of five years. In connection with this new mortgage loan financing, the unconsolidated entity repaid the previous $9.2 million mortgage loan using proceeds from the new mortgage loan.