Short-term Investments

12 Months Ended

Dec. 31, 2012

Short-term Investments [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

SHORT-TERM INVESTMENTS

Our short-term investments consist of diversified depository accounts, money market funds and variable rate demand obligations, all of which have very short maturity periods and therefore earn an interest rate commensurate with low-risk instruments. We classify our short-term investments as "available for sale" and there is no significant difference between cost and fair value. We do not attempt to hedge our exposure to interest rate risk for our short-term investments. All short-term investments of REIT funds are made in compliance with the requirements of the Internal Revenue Code with respect to qualifying REIT investments.