Quarterly report pursuant to Section 13 or 15(d)

Non-Cash Activities (Notes)

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Non-Cash Activities (Notes)
6 Months Ended
Jun. 30, 2012
Non Cash Activities [Abstract]  
Nonmonetary Transactions Disclosure [Text Block]
Non-Cash Activities
We purchase capital equipment and incur costs relating to construction of facilities, including tenant finishing allowances. Expenditures included in construction trade payables as of June 30, 2012 and 2011 amounted to $14.7 million and $27.3 million, respectively.