Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Period in which short-term investment become cash equivalents (days)			90
Assets or liabilities for uncertain tax positions	$ 0		$ 0		$ 0
Interest or penalties from uncertain tax positions	0	0	0	0
Asset retirement obligations	1,300,000		1,300,000		1,300,000
Amount reclassified from rental revenue to construction management revenue	740,000	1,715,000	1,421,000	2,548,000
Digital Realty Trust, Inc. [Member]
Amount reclassified from rental revenue to construction management revenue		1,000,000		2,500,000
Amount reclassified from rental property operating and maintenance expense to construction management expense		$ 500,000		$ 1,100,000