Subsequent Events (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Subsequent Event [Line Items]
Total net proceeds, after underwriting discounts and estimated offering expenses	$ 250,000	$ 182,500
Common Stock, par value	$ 0.01		$ 0.01
Common Stock, authorized	215,000,000		215,000,000
Preferred Stock, par value	$ 0.01		$ 0.01
Preferred Stock, authorized	70,000,000		70,000,000
Digital Realty Trust, L.P. [Member]
Subsequent Event [Line Items]
Shares issued	$ (290)