Related Parties	12 Months Ended
Dec. 31, 2012
Related Party Transactions [Abstract]
Related Parties	Related Parties Through our management activities and transactions with our real estate joint ventures and partnerships, we had net accounts receivable of $1.8 million and $2.2 million outstanding as of December 31, 2012 and 2011, respectively. We also had accounts payable and accrued expenses of $6.3 million and $8.2 million outstanding as of December 31, 2012 and 2011, respectively. For the year ended December 31, 2012, 2011 and 2010, we recorded joint venture fee income of $6.1 million, $6.0 million and $5.8 million, respectively. In February 2012, we sold our 47.8% unconsolidated joint venture interest in a Colorado development project to our partner with gross sales proceeds totaling $29.1 million, which includes the assumption of our share of debt, generating a gain of $3.5 million. In November 2012, we sold three unconsolidated joint venture interests, ranging from 20% to 50%, in nine industrial properties to our partner with gross sales proceeds totaling $20.9 million, which includes the assumption of our share of debt, generating a gain of $8.6 million.

Related Parties

12 Months Ended

Dec. 31, 2012

Through our management activities and transactions with our real estate joint ventures and partnerships, we had net accounts receivable of $1.8 million and $2.2 million outstanding as of December 31, 2012 and 2011, respectively. We also had accounts payable and accrued expenses of $6.3 million and $8.2 million outstanding as of December 31, 2012 and 2011, respectively. For the year ended December 31, 2012, 2011 and 2010, we recorded joint venture fee income of $6.1 million, $6.0 million and $5.8 million, respectively.

In February 2012, we sold our 47.8% unconsolidated joint venture interest in a Colorado development project to our partner with gross sales proceeds totaling $29.1 million, which includes the assumption of our share of debt, generating a gain of $3.5 million.

In November 2012, we sold three unconsolidated joint venture interests, ranging from 20% to 50%, in nine industrial properties to our partner with gross sales proceeds totaling $20.9 million, which includes the assumption of our share of debt, generating a gain of $8.6 million.