13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes Supplemental Consolidating Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues:
Base rent	$ 91,268	$ 82,533
Recoveries from tenants	45,295	38,694
Other revenues	2,921	2,922
Total revenues	139,484	124,149
Expenses:
Property operating costs	40,191	35,955
Real estate taxes and insurance	5,010	5,316
Depreciation and amortization	28,207	25,843
General and administrative	6,812	5,575
Other expenses	2,705	2,349
Total expenses	82,925	75,038
Operating income	56,559	49,111
Interest:
Expense incurred	(11,459)	(11,569)
Amortization of deferred financing costs	(825)	(845)
Net income	44,275	36,697
Preferred stock dividends	(3,333)	(6,811)
Net income attributable to common units	40,942	29,886
DuPont Fabros Technology, L.P. [Member]
Revenues:
Base rent	91,268	82,533
Recoveries from tenants	45,295	38,694
Other revenues	2,921	2,922
Total revenues	139,484	124,149
Expenses:
Property operating costs	40,191	35,955
Real estate taxes and insurance	5,010	5,316
Depreciation and amortization	28,207	25,843
General and administrative	6,812	5,575
Other expenses	2,705	2,349
Total expenses	82,925	75,038
Operating income	56,559	49,111
Interest:
Expense incurred	(11,459)	(11,569)
Amortization of deferred financing costs	(825)	(845)
Equity in earnings	0	0
Net income	44,275	36,697
Preferred stock dividends	(3,333)	(6,811)
Net income attributable to common units	40,942	29,886
DuPont Fabros Technology, L.P. [Member] | Operating Partnership [Member]
Revenues:
Base rent	4,695	4,402
Recoveries from tenants	0	0
Other revenues	0	0
Total revenues	4,695	4,402
Expenses:
Property operating costs	0	0
Real estate taxes and insurance	0	0
Depreciation and amortization	44	15
General and administrative	6,546	5,433
Other expenses	512	106
Total expenses	7,102	5,554
Operating income	(2,407)	(1,152)
Interest:
Expense incurred	(14,870)	(14,174)
Amortization of deferred financing costs	(1,018)	(953)
Equity in earnings	62,570	52,976
Net income	44,275	36,697
Preferred stock dividends	(3,333)	(6,811)
Net income attributable to common units	40,942	29,886
DuPont Fabros Technology, L.P. [Member] | Subsidiary Guarantors [Member]
Revenues:
Base rent	66,692	69,366
Recoveries from tenants	36,093	34,375
Other revenues	420	464
Total revenues	103,205	104,205
Expenses:
Property operating costs	35,915	35,605
Real estate taxes and insurance	3,979	4,696
Depreciation and amortization	21,775	22,486
General and administrative	8	9
Other expenses	12	139
Total expenses	61,689	62,935
Operating income	41,516	41,270
Interest:
Expense incurred	1,037	0
Amortization of deferred financing costs	77	0
Equity in earnings	0	0
Net income	42,630	41,270
Preferred stock dividends	0	0
Net income attributable to common units	42,630	41,270
DuPont Fabros Technology, L.P. [Member] | Subsidiary Non-Guarantors [Member]
Revenues:
Base rent	24,576	13,204
Recoveries from tenants	9,202	4,319
Other revenues	2,501	2,482
Total revenues	36,279	20,005
Expenses:
Property operating costs	8,971	4,776
Real estate taxes and insurance	1,031	620
Depreciation and amortization	6,388	3,342
General and administrative	258	133
Other expenses	2,181	2,141
Total expenses	18,829	11,012
Operating income	17,450	8,993
Interest:
Expense incurred	2,374	2,605
Amortization of deferred financing costs	116	108
Equity in earnings	0	0
Net income	19,940	11,706
Preferred stock dividends	0	0
Net income attributable to common units	19,940	11,706
DuPont Fabros Technology, L.P. [Member] | Eliminations [Member]
Revenues:
Base rent	(4,695)	(4,439)
Recoveries from tenants	0	0
Other revenues	0	(24)
Total revenues	(4,695)	(4,463)
Expenses:
Property operating costs	(4,695)	(4,426)
Real estate taxes and insurance	0	0
Depreciation and amortization	0	0
General and administrative	0	0
Other expenses	0	(37)
Total expenses	(4,695)	(4,463)
Operating income	0	0
Interest:
Expense incurred	0	0
Amortization of deferred financing costs	0	0
Equity in earnings	(62,570)	(52,976)
Net income	(62,570)	(52,976)
Preferred stock dividends	0	0
Net income attributable to common units	$ (62,570)	$ (52,976)