General Information on La Costa LLC (Parenthetical) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013
Investments in and Advances to Affiliates [Line Items]
Mortgage note expires	Jul. 19, 2016
La Costa LLC
Investments in and Advances to Affiliates [Line Items]
Real estate assets	23,500,000
Total assets	25,800,000
Mortgages payable	14,100,000
Total liabilities	14,900,000
Total revenues	1,900,000
Total expenses	1,400,000
Net loss	186,000
The mortgage note bears interest at the rate of LIBOR	6.00%
The mortgage note bears interest at the rate of LIBOR plus a margin of 325 basis points	5.75%
Mortgage note expires	Oct. 01, 2014
Mortgage note, number of maturity date extension options	3
Mortgage note, potential maturity date extension period	1 year
Interest rate cap related to mortgage note maximum	3.00%
Bay Hill Property
Investments in and Advances to Affiliates [Line Items]
The mortgage note bears interest at the rate of LIBOR	3.50%
The mortgage note bears interest at the rate of LIBOR plus a margin of 325 basis points	3.25%
Mortgage note expires	Apr. 02, 2015
Mortgage note, number of maturity date extension options	2
Mortgage note, potential maturity date extension period	1 year
Outstanding borrowings on mortgage note incurred	23,800,000