11. Earnings Per Unit of the Operating Partnership (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings per unit of the Operating Partnership [Line Items]
Weighted average common units – basic (includes redeemable partnership units and units of general and limited partners)	89,168,665	88,977,907	89,132,366	85,483,976
Effect of dilutive securities	1,001,676	861,057	991,329	857,089
Weighted average common units – diluted	90,170,341	89,838,964	90,123,695	86,341,065
Net income Loss attributable to common units, basic	$ 34,630	$ 44,766	$ 75,572	$ 74,652
Net income allocated to unvested restricted units	(175)	(159)	(351)	(312)
Net income attributable to common units, adjusted	$ 34,455	$ 44,607	$ 75,221	$ 74,340
Earnings per unit, basic	$ 0.39	$ 0.50	$ 0.84	$ 0.87
Earnings per unit, diluted	$ 0.38	$ 0.49	$ 0.83	$ 0.86
DuPont Fabros Technology, L.P. [Member]
Earnings per unit of the Operating Partnership [Line Items]
Net income Loss attributable to common units, basic	$ 34,630	$ 44,766	$ 75,572	$ 74,652
Earnings per unit, basic	$ 0.39	$ 0.50	$ 0.84	$ 0.87
Earnings per unit, diluted	$ 0.38	$ 0.49	$ 0.83	$ 0.86
Performance Shares [Member]
Earnings per unit of the Operating Partnership [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	100,000	100,000	100,000	100,000

DUPONT FABROS TECHNOLOGY, INC. 10-Q