Dupont Fabros Technology 10-Q 7 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	3 Months Ended
	Mar. 31, 2015	1-May-15
Entity Information [Line Items]
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Registrant Name	DUPONT FABROS TECHNOLOGY, INC.
Entity Central Index Key	1407739
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Entity Common Stock, Shares Outstanding		65,374,247
DuPont Fabros Technology, L.P. [Member]
Entity Information [Line Items]
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	FALSE
Entity Registrant Name	DUPONT FABROS TECHNOLOGY, L.P.
Entity Central Index Key	1418175
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
ASSETS
Land	$83,793		$83,793
Buildings and improvements	2,624,963		2,623,539
Income producing property	2,708,756		2,707,332
Less: accumulated depreciation	-528,539		-504,869
Net income producing property	2,180,217		2,202,463
Construction in progress and land held for development	410,870	[1]	358,965
Net real estate	2,591,087		2,561,428
Cash and cash equivalents	27,059		29,598
Rents and other receivables	11,712		8,113
Deferred rent	138,582		142,365
Lease contracts above market value, net	7,779		8,054
Deferred costs, net	38,029		38,495
Prepaid expenses and other assets	50,431		48,295
Total assets	2,864,679		2,836,348
Liabilities:
Line of credit	150,000		60,000
Mortgage notes payable	115,000		115,000
Unsecured Term Loan	250,000		250,000
Unsecured notes payable	600,000		600,000
Accounts payable and accrued liabilities	28,529		26,973
Construction costs payable	25,482		32,949
Accrued interest payable	1,943		10,759
Dividend and distribution payable	39,685		39,981
Lease contracts below market value, net	6,169		7,037
Prepaid rents and other liabilities	67,824		65,174
Total liabilities	1,284,632		1,207,873
Redeemable noncontrolling interests - operating partnership	503,901		513,134
Commitments and contingencies	0		0
Stockholders’ equity:
Common stock, $.001 par value, 250,000,000 shares authorized, 65,375,225 shares issued and outstanding at March 31, 2015 and 66,061,804 shares issued and outstanding at December 31, 2014	65		66
Additional paid in capital	724,831		764,025
Retained earnings (accumulated deficit)	0		0
Total stockholders’ equity	1,076,146		1,115,341
Total liabilities and stockholders’ equity	2,864,679		2,836,348
Series A Preferred Stock [Member]
Stockholders’ equity:
Preferred stock, $.001 par value, 50,000,000 shares authorized	185,000		185,000
Series B Preferred Stock [Member]
Stockholders’ equity:
Preferred stock, $.001 par value, 50,000,000 shares authorized	166,250		166,250
DuPont Fabros Technology, L.P. [Member]
ASSETS
Land	83,793		83,793
Buildings and improvements	2,624,963		2,623,539
Income producing property	2,708,756		2,707,332
Less: accumulated depreciation	-528,539		-504,869
Net income producing property	2,180,217		2,202,463
Construction in progress and land held for development	410,870		358,965
Net real estate	2,591,087		2,561,428
Cash and cash equivalents	22,841		25,380
Rents and other receivables	11,712		8,113
Deferred rent	138,582		142,365
Lease contracts above market value, net	7,779		8,054
Deferred costs, net	38,029		38,495
Prepaid expenses and other assets	50,431		48,295
Total assets	2,860,461		2,832,130
Liabilities:
Line of credit	150,000		60,000
Mortgage notes payable	115,000		115,000
Unsecured Term Loan	250,000		250,000
Unsecured notes payable	600,000		600,000
Accounts payable and accrued liabilities	28,529		26,973
Construction costs payable	25,482		32,949
Accrued interest payable	1,943		10,759
Dividend and distribution payable	39,685		39,981
Lease contracts below market value, net	6,169		7,037
Prepaid rents and other liabilities	67,824		65,174
Total liabilities	1,284,632		1,207,873
Redeemable noncontrolling interests - operating partnership	503,901		513,134
Redeemable partnership units	503,901		513,134
Commitments and contingencies	0		0
Stockholders’ equity:
Total liabilities and stockholders’ equity	2,860,461		2,832,130
Partners’ capital:
General partner’s capital, common units, 662,373 issued and outstanding at March 31, 2015 and December 31, 2014	7,302		7,619
Total partners’ capital	1,071,928		1,111,123
DuPont Fabros Technology, L.P. [Member] | Series A Preferred Stock [Member]
Partners’ capital:
Limited partners' capital	185,000		185,000
DuPont Fabros Technology, L.P. [Member] | Series B Preferred Stock [Member]
Partners’ capital:
Limited partners' capital	166,250		166,250
Series A cumulative redeemable perpetual preferred units [Member] | DuPont Fabros Technology, L.P. [Member]
Partners’ capital:
Limited partners' capital	185,000		185,000
Series B cumulative redeemable perpetual preferred units [Member] | DuPont Fabros Technology, L.P. [Member]
Partners’ capital:
Limited partners' capital	166,250		166,250
Limited partners' common units [Member] | DuPont Fabros Technology, L.P. [Member]
Partners’ capital:
Limited partners' capital	$713,376		$752,254
[1]	(1)Properties located in Ashburn, VA (ACC7 Phases II-IV and ACC8); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2) and Santa Clara, CA (SC1 Phase IIB and SC2).

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	50,000,000	50,000,000
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	65,375,225	66,061,804
Common stock, shares outstanding	65,375,225	66,061,804
General Partners' Capital Account, Units Issued	662,373	662,373
General partners' capital, units outstanding	662,373	662,373
Series A cumulative redeemable perpetual preferred stock [Member]
Preferred stock, shares issued	7,400,000	7,400,000
Preferred stock, shares outstanding	7,400,000	7,400,000
Series B cumulative redeemable perpetual preferred stock [Member]
Preferred stock, shares issued	6,650,000	6,650,000
Preferred stock, shares outstanding	6,650,000	6,650,000
Series A Preferred Units [Member]
Limited partners' capital, common units issued	7,400,000	7,400,000
Limited partners' capital, common units outstanding	7,400,000	7,400,000
Series B Preferred Units [Member]
Limited partners' capital, common units issued	6,650,000	6,650,000
Limited partners' capital, common units outstanding	6,650,000	6,650,000
Limited partners' common units [Member]
Limited partners' capital, common units issued	64,712,852	65,399,431
Limited partners' capital, common units outstanding	64,712,852	65,399,431

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Base rent	$71,573	$69,204
Recoveries from tenants	33,305	31,689
Other revenues	2,436	1,194
Total revenues	107,314	102,087
Expenses:
Property operating costs	31,493	30,095
Real estate taxes and insurance	3,976	3,467
Depreciation and amortization	25,027	23,269
General and administrative	4,343	4,240
Other expenses	7,253	873
Total expenses	72,092	61,944
Operating income	35,222	40,143
Interest income	11	68
Interest:
Expense incurred	-8,258	-7,824
Amortization of deferred financing costs	-642	-743
Net income	26,333	31,644
Net loss (income) attributable to redeemable noncontrolling interests – operating partnership	-3,719	-4,788
Net (loss) income attributable to controlling interests	22,614	26,856
Preferred stock dividends	-6,811	-6,811
Net (loss) income attributable to common shares	15,803	20,045
Earnings per share – basic:
Net income attributable to common shares	$0.24	$0.30
Weighted average common shares outstanding	65,506,028	65,348,269
Earnings per share – diluted:
Net income attributable to common shares	$0.24	$0.30
Weighted average common shares outstanding	66,456,271	65,823,921
Dividends declared per common share	$0.42	$0.35
Earnings per unit – diluted:
Weighted average common units outstanding	80,926,265	80,956,206
DuPont Fabros Technology, L.P. [Member]
Revenues:
Base rent	71,573	69,204
Recoveries from tenants	33,305	31,689
Other revenues	2,436	1,194
Total revenues	107,314	102,087
Expenses:
Property operating costs	31,493	30,095
Real estate taxes and insurance	3,976	3,467
Depreciation and amortization	25,027	23,269
General and administrative	4,343	4,240
Other expenses	7,253	873
Total expenses	72,092	61,944
Operating income	35,222	40,143
Interest income	11	68
Interest:
Expense incurred	-8,258	-7,824
Amortization of deferred financing costs	-642	-743
Net income	26,333	31,644
Preferred stock dividends	-6,811	-6,811
Net income attributable to common units	$19,522	$24,833
Earnings per unit – basic:
Net income attributable to common units	$0.24	$0.30
Weighted average common units outstanding	80,926,265	80,956,206
Earnings per unit – diluted:
Net income attributable to common units	$0.24	$0.30
Weighted Average Limited Partnership Units Outstanding, Diluted	81,876,508	81,431,858
Distributions declared per unit	$0.42	$0.35

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	PreferredStock/Units [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
In Thousands, except Share data
Balance at Dec. 31, 2014	$1,115,341	$351,250	$66	$764,025	$0
Balance, shares at Dec. 31, 2014	66,061,804
Net income attributable to controlling interests	22,614				22,614
Dividends declared on common stock	-27,457			-11,654	-15,803
Dividends earned on preferred stock	-6,811				-6,811
Redemption of operating partnership units	598			598
Common stock repurchase	-31,912		-1	-31,911
Common stock repurchase, shares	-1,002,610
Redemption of operating partnership units, shares	18,000
Issuance of stock awards	1,761			1,761
Issuance of stock awards, shares	530,419
Retirement and forfeiture of stock awards	-7,489			-7,489
Retirement and forfeiture of stock awards, shares	-232,388
Amortization of deferred compensation costs	3,623			3,623
Adjustments to redeemable noncontrolling interests – operating partnership	5,878			5,878
Balance at Mar. 31, 2015	$1,076,146	$351,250	$65	$724,831	$0
Balance, shares at Mar. 31, 2015	65,375,225

Consolidated_Statement_of_Part

Consolidated Statement of Partners' Capital (USD $)	Total	DuPont Fabros Technology, L.P. [Member]	DuPont Fabros Technology, L.P. [Member]	DuPont Fabros Technology, L.P. [Member]	DuPont Fabros Technology, L.P. [Member]
In Thousands, except Share data			Limited Partners' Capital - Preferred [Member]	Limited Partners' Capital - Common [Member]	General Partner's Capital [Member]
Balance at Dec. 31, 2014		$1,111,123	$351,250	$752,254	$7,619
Balance, units at Dec. 31, 2014				65,399,431	662,373
Net income	26,333	26,333		26,066	267
Common unit distributions		-33,933		-33,655	-278
Preferred unit distributions		-6,811		-6,742	-69
Redemption of operating partnership units, shares	18,000	18,000		18,000
Redemption of operating partnership units	598	598		598
Retirement of OP units for common stock repurchase, units				1,002,610
Retirement of OP units for common stock repurchases	-31,912			31,912
Issuance of OP units for stock awards, units				530,419
Issuance of OP units for stock awards		1,761		1,761
Retirement and forfeiture of OP units, units				-232,388
Retirement and forfeiture of OP units		-7,489		-7,489
Amortization of deferred compensation costs	3,623	3,623		3,623
Adjustments to redeemable partnership units		8,635		8,872	-237
Balance at Mar. 31, 2015		$1,071,928	$351,250	$713,376	$7,302
Balance, units at Mar. 31, 2015				64,712,852	662,373

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flow from operating activities
Net income	$26,333	$31,644
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	25,027	23,269
Straight line rent	3,783	711
Amortization of deferred financing costs	-642	-743
Amortization of lease contracts above and below market value	-593	-599
Compensation paid with Company common shares	5,290	1,593
Changes in operating assets and liabilities
Rents and other receivables	-3,599	-979
Deferred costs	-1,474	-52
Prepaid expenses and other assets	-2,052	-5,933
Accounts payable and accrued liabilities	1,916	-1,191
Accrued interest payable	-8,816	-8,012
Prepaid rents and other liabilities	2,635	3,297
Net cash provided by operating activities	49,092	44,491
Cash flow from investing activities
Investments in real estate – development	-57,584	-80,159
Interest capitalized for real estate under development	-2,856	-2,965
Improvements to real estate	-574	-425
Additions to non-real estate property	-176	-220
Net cash used in investing activities	-61,190	-83,769
Line of credit:
Proceeds	90,000	0
Unsecured term loan:
Proceeds	0	96,000
Payments of financing costs	0	-96
Equity compensation (payments) proceeds	7,489	-3,457
Payments for Repurchase of Common Stock	-31,912	0
Dividends and distributions:
Common shares	-27,745	-16,301
Preferred shares	-6,811	-6,811
Redeemable noncontrolling interests – operating partnership	-6,484	-3,918
Net cash provided by financing activities	9,559	72,331
Net increase (decrease) in cash and cash equivalents	-2,539	33,053
Cash and cash equivalents, beginning	29,598	38,733
Cash and cash equivalents, ending	27,059	71,786
Supplemental information:
Cash paid for interest	19,930	18,802
Deferred financing costs capitalized for real estate under development	231	170
Construction costs payable capitalized for real estate under development	25,482	25,489
Redemption of operating partnership units	598	2,100
Adjustments to redeemable noncontrolling interests – operating partnership	5,878	9,334
DuPont Fabros Technology, L.P. [Member]
Cash flow from operating activities
Net income	26,333	31,644
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	25,027	23,269
Straight line rent	3,783	711
Amortization of deferred financing costs	-642	-743
Amortization of lease contracts above and below market value	-593	-599
Compensation paid with Company common shares	5,290	1,593
Changes in operating assets and liabilities
Rents and other receivables	-3,599	-979
Deferred costs	-1,474	-52
Prepaid expenses and other assets	-2,052	-5,933
Accounts payable and accrued liabilities	1,916	-1,190
Accrued interest payable	-8,816	-8,012
Prepaid rents and other liabilities	2,635	3,297
Net cash provided by operating activities	49,092	44,492
Cash flow from investing activities
Investments in real estate – development	-57,584	-80,159
Interest capitalized for real estate under development	-2,856	-2,965
Improvements to real estate	-574	-425
Additions to non-real estate property	-176	-220
Net cash used in investing activities	-61,190	-83,769
Line of credit:
Proceeds	90,000	0
Unsecured term loan:
Proceeds	0	96,000
Payments of financing costs	0	-96
Equity compensation (payments) proceeds	7,489	-3,457
Payments for Repurchase of Common Stock	-31,912	0
Distributions	-41,040	-27,030
Dividends and distributions:
Net cash provided by financing activities	9,559	72,331
Net increase (decrease) in cash and cash equivalents	-2,539	33,054
Cash and cash equivalents, beginning	25,380	34,514
Cash and cash equivalents, ending	22,841	67,568
Supplemental information:
Cash paid for interest	19,930	18,802
Deferred financing costs capitalized for real estate under development	231	170
Construction costs payable capitalized for real estate under development	25,482	25,489
Redemption of operating partnership units	598	2,100
Adjustments to redeemable noncontrolling interests – operating partnership	($8,635)	($4,547)

1_Description_of_Business

1. Description of Business	3 Months Ended
	Mar. 31, 2015
Description of Business [Abstract]
Nature of Operations [Text Block]	Description of Business
	DuPont Fabros Technology, Inc. (“DFT”), through its controlling interest in DuPont Fabros Technology, L.P. (the “Operating Partnership” or “OP” and collectively with DFT and their operating subsidiaries, the “Company”), is a fully integrated, self-administered and self-managed company that owns, acquires, develops and operates wholesale data centers. DFT is a real estate investment trust, or REIT, for federal income tax purposes and is the sole general partner of the Operating Partnership, and as of March 31, 2015, owned 80.9% of the common economic interest in the Operating Partnership, of which 1.0% is held as general partnership units. Unless otherwise indicated or unless the context requires otherwise, all references in this report to “we,” “us,” “our,” “our Company” or “the Company” refer to DFT and the Operating Partnership, collectively. As of March 31, 2015, we held a fee simple interest in the following properties:
	•	11 operating data centers – ACC2, ACC3, ACC4, ACC5, ACC6, ACC7 Phase I, VA3, VA4, CH1, NJ1 Phase I and SC1 Phases I and IIA;
	•	three data centers currently under development – SC1 Phase IIB, CH2 Phase I and ACC7 Phase II;
	•	data center projects available for future development – ACC7 Phases III-IV, CH2 Phases II-III and NJ1 Phase II; and
	•	land that may be used to develop additional data centers – ACC8 and SC2.
	SC1 Phase IIB was placed into service in May 2015.

2_Significant_Accounting_Polic

2. Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Significant Accounting Policies
	Basis of Presentation
	This report combines the quarterly reports on Form 10-Q for the quarter ended March 31, 2015 of DuPont Fabros Technology, Inc. and DuPont Fabros Technology, L.P. References to “DFT” mean DuPont Fabros Technology, Inc. and its controlled subsidiaries; and references to the “Operating Partnership” or “OP” mean DuPont Fabros Technology, L.P. and its controlled subsidiaries.
	We believe combining the quarterly reports on Form 10-Q of DFT and the Operating Partnership into this single report provides the following benefits:
	•	enhances investors’ understanding of DFT and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;
	•	eliminates duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the disclosure in this report applies to both DFT and the Operating Partnership; and
	•	creates time and cost efficiencies through the preparation of one combined report instead of two separate reports.
	We operate DFT and the Operating Partnership as one business. The management of DFT consists of the same employees as the management of the Operating Partnership.
	We believe it is important for investors to understand the few differences between DFT and the Operating Partnership in the context of how DFT and the Operating Partnership operate as a consolidated company. DFT is a REIT, whose only material asset is its ownership of OP units of the Operating Partnership. As a result, DFT does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time and guaranteeing unsecured debt of the Operating Partnership. DFT has not issued any indebtedness, but has guaranteed all of the unsecured debt of the Operating Partnership. The Operating Partnership holds all the real estate assets of the Company. Except for net proceeds from public equity issuances by DFT, which are contributed to the Operating Partnership in exchange for OP units or preferred units, the Operating Partnership generates all remaining capital required by our business. These sources include the Operating Partnership’s operations, its direct or indirect incurrence of indebtedness, and the issuance of partnership units.
	As general partner with control of the Operating Partnership, DFT consolidates the Operating Partnership for financial reporting purposes. The presentation of stockholders’ equity and partners’ capital are the main areas of difference between the consolidated financial statements of DFT and those of the Operating Partnership. The Operating Partnership’s capital includes preferred units and general and limited common units that are owned by DFT and the other partners. DFT’s stockholders’ equity includes preferred stock, common stock, additional paid in capital and retained earnings. The common limited partnership interests held by the limited partners (other than DFT) in the Operating Partnership are presented as “redeemable partnership units” in the Operating Partnership’s consolidated financial statements and as “redeemable noncontrolling interests-operating partnership” in DFT’s consolidated financial statements. The only difference between the assets and liabilities of DFT and the Operating Partnership as of March 31, 2015 is a $4.2 million bank account held by DFT that is not part of the Operating Partnership. Net income is the same for DFT and the Operating Partnership.
	The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In our opinion, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. All significant intercompany accounts and transactions have been eliminated in the accompanying consolidated financial statements. The results of operations for the three months ended March 31, 2015 are not necessarily indicative of the results that may be expected for the full year. These consolidated financial statements should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations contained elsewhere in this Form 10-Q and the audited financial statements and accompanying notes for the year ended December 31, 2014 contained in our Annual Report on Form 10-K, which contains a complete listing of our significant accounting policies.
	We have one reportable segment consisting of investments in data centers located in the United States. All of our properties generate similar types of revenues and expenses related to customer rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a range of customers, the types of services provided to them are limited to a few core principles. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
	Property
	Depreciation on buildings is generally provided on a straight-line basis over 40 years from the date the buildings were placed in service. Building components are depreciated over the life of the respective improvement ranging from 10 to 40 years from the date the components were placed in service. Personal property is depreciated over three years to seven years. Depreciation expense was $23.9 million and $22.2 million for the three months ended March 31, 2015 and 2014, respectively. Included in these amounts is amortization expense related to tenant origination costs, which was $0.7 million and $0.8 million for the three months ended March 31, 2015 and 2014, respectively. Repairs and maintenance costs are expensed as incurred.
	We record impairment losses on long-lived assets used in operations or in development when events or changes in circumstances indicate that the assets might be impaired, and the estimated undiscounted cash flows to be generated by those assets are less than the carrying amounts. If circumstances indicating impairment of a long-lived asset are present, we would determine the fair value of that asset, and an impairment loss would be recognized in an amount equal to the excess of the carrying amount of the impaired asset over its fair value. We assess the recoverability of the carrying value of our assets on a property-by-property basis. No impairment losses were recorded during the three months ended March 31, 2015 and 2014.
	Deferred Costs
	Deferred costs, net in our accompanying consolidated balance sheets include both financing and leasing costs.
	Financing costs, which represent fees and other costs incurred in obtaining debt, are amortized using the effective-interest rate method, or a method that approximates the effective-interest method, over the term of the loan and are included in amortization of deferred financing costs. In May 2014, we amended our unsecured revolving credit facility ("Unsecured Credit
	Facility"), which, due to the change in composition of lenders comprising the Unsecured Credit Facility's bank group, resulted
	in the partial write-off of unamortized deferred financing costs totaling $0.3 million. In July 2014, we amended our unsecured
	term loan agreement ("Unsecured Term Loan"), which, due to the change in composition of lenders comprising the Unsecured
	Term Loan's bank group, resulted in a loss on early extinguishment of debt of $1.4 million, which included a partial write-off of
	unamortized deferred financing costs of $0.7 million. Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Financing costs	$	24,110			$	24,110
	Accumulated amortization	(7,693		)		(6,820		)
	Financing costs, net	$	16,417			$	17,290
	Leasing costs, which are either external fees and costs incurred in the successful negotiations of leases, internal costs expended in the successful negotiations of leases or the estimated leasing commissions resulting from the allocation of the purchase price of ACC2, VA3, VA4 and ACC4, are deferred and amortized over the terms of the related leases on a straight-line basis. If an applicable lease terminates prior to the expiration of its initial term, the carrying amount of the costs are written off to amortization expense. Leasing costs incurred for the three months ended March 31, 2015 and 2014 were as follows (in thousands):
		Three months ended March 31,
		2015				2014
	Leasing costs incurred for new leases	$	373			$	52
	Leasing costs incurred for renewals	1,101				—
	Total leasing costs incurred	$	1,474			$	52
	Amortization of deferred leasing costs totaled $1.1 million and $1.0 million for the three months ended March 31, 2015 and 2014, respectively. Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Leasing costs	$	53,832			$	52,358
	Accumulated amortization	(32,220		)		(31,153		)
	Leasing costs, net	$	21,612			$	21,205
	Inventory
	We maintain fuel inventory for our generators, which is recorded at the lower of cost (on a first-in, first-out basis) or market. As of March 31, 2015 and December 31, 2014, the fuel inventory was $4.4 million and $4.3 million, respectively, and is included in prepaid expenses and other assets in the accompanying consolidated balance sheets.
	Rental Income
	We, as a lessor, have retained substantially all the risks and benefits of ownership and account for our leases as operating leases. For lease agreements that provide for scheduled fixed and determinable rent increases, rental income is recognized on a straight-line basis over the non-cancellable term of the leases, which commences when control of the space and critical power have been provided to the customer. If the lease contains an early termination clause with a penalty payment, we determine the lease termination date by evaluating whether the penalty reasonably assures that the lease will not be terminated early. Lease inducements, which include free rent or cash payments to customers, are amortized as a reduction of rental income over the non-cancellable lease term. Straight-line rents receivable are included in deferred rent in the accompanying consolidated balance sheets. Lease intangible assets and liabilities that have resulted from above-market and below-market leases that were acquired are amortized on a straight-line basis as decreases and increases, respectively, to rental revenue over the remaining non-cancellable term of the underlying leases. If a lease terminates prior to the expiration of its initial term, the unamortized portion of lease intangibles associated with that lease will be written off to rental revenue. Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Lease contracts above market value	$	23,100			$	23,100
	Accumulated amortization	(15,321		)		(15,046		)
	Lease contracts above market value, net	$	7,779			$	8,054
	Lease contracts below market value	$	39,375			$	39,375
	Accumulated amortization	(33,206		)		(32,338		)
	Lease contracts below market value, net	$	6,169			$	7,037
	Our policy is to record a reserve for losses on accounts receivable equal to the estimated uncollectible accounts. The estimate is based on our historical experience and a review of the current status of our receivables. As of March 31, 2015 and December 31, 2014, we applied interest received to the note principal balance and had reserves against rents and other receivables of $5.1 million and $4.9 million, respectively. We also establish an appropriate allowance for doubtful accounts for receivables arising from the straight-lining of rents. These receivables arise from revenue recognized in excess of amounts currently due under the lease and are recorded as deferred rent in the accompanying consolidated balance sheets. As of March 31, 2015 and December 31, 2014, we had reserves against deferred rent of $3.7 million.
	The reserves described above were established for one customer that restructured its lease obligations with us during 2013. Under this restructuring, this customer's outstanding accounts receivable and deferred rent receivable related to the space that was returned to us were converted into a note receivable, the terms of which require the payment of principal and interest through December 31, 2016. Principal payments on the note are calculated on a ten-year amortization schedule with a final principal payment of the remaining note balance due on December 31, 2016. Additionally, under this restructuring, this customer deferred two-thirds of its base rent payments due for its lease at our NJ1 facility through July 2014, which were added to the note. In February 2015, this customer filed a voluntary petition for relief under Chapter 11 of the United States Bankruptcy Code. To date, we have applied the interest portion of all note payments received, totaling $1.2 million, to the note principal balance on our consolidated balance sheet. The note balance as of March 31, 2015 and December 31, 2014 was $6.5 million and $6.6 million, respectively, which is recorded within rents and other receivables, net in our accompanying consolidated balance sheets. The note receivable balance, net of reserves and interest applied to the principal, as of March 31, 2015 and December 31, 2014 was $1.4 million and $1.7 million, respectively.
	Due to the uncertainty surrounding this customer's ability to pay its contractual rent obligations, we have also reserved $3.7 million of this customer's deferred rent receivable balance of $8.5 million as of March 31, 2015.
	Customer leases generally contain provisions under which the customers reimburse us for a portion of operating expenses and real estate taxes incurred by the property. Recoveries from tenants are included in revenue in the accompanying consolidated statements of operations in the period the applicable expenditures are incurred. Most of our leases also provide us with a property management fee based on a percentage of base rent collected and property-level operating expenses, other than charges for power used by customers to run their servers and cool their space. Property management fees are included in base rent in the accompanying consolidated statements of operations in the applicable period in which they are earned.
	Other Revenue
	Other revenue primarily consists of services provided to customers on a non-recurring basis. This includes projects such as the purchase and installation of circuits, racks, breakers and other customer requested items. Revenue is recognized on a completed contract basis when the project is finished and ready for the customer's use. This method is consistently applied for all periods presented. Costs of providing these services are included in other expenses in the accompanying consolidated statements of operations.
	Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Partnership Units
	Redeemable noncontrolling interests – operating partnership, as presented on DFT’s consolidated balance sheets, represent the limited partnership interests in the Operating Partnership (“OP units”) held by individuals and entities other than DFT. These interests are also presented on the Operating Partnership’s consolidated balance sheets, referred to as “redeemable partnership units.” Accordingly, the following discussion related to redeemable noncontrolling interests – operating partnership of DFT refers equally to redeemable partnership units of the Operating Partnership.
	Redeemable noncontrolling interests – operating partnership, which require cash payment, or allow settlement in shares, but with the ability to deliver the shares outside of the control of DFT, are reported outside of the permanent equity section of the consolidated balance sheets of DFT and the Operating Partnership. Redeemable noncontrolling interests – operating partnership are adjusted for income, losses and distributions allocated to OP units not held by DFT (normal noncontrolling interest accounting amount). Adjustments to redeemable noncontrolling interests – operating partnership are recorded to reflect increases or decreases in the ownership of the Operating Partnership by holders of OP units, including the redemptions of OP units for cash or in exchange for shares of DFT’s common stock. If such adjustments result in redeemable noncontrolling interests – operating partnership being recorded at less than the redemption value of the OP units, redeemable noncontrolling interests – operating partnership are further adjusted to their redemption value (see Note 6). Redeemable noncontrolling interests – operating partnership are recorded at the greater of the normal noncontrolling interest accounting amount or redemption value. The following is a summary of activity for redeemable noncontrolling interests – operating partnership for the three months ended March 31, 2015 (dollars in thousands):
		OP Units
	Number			Amount
Balance at December 31, 2014	15,437,237			$	513,134
Net income attributable to redeemable noncontrolling interests – operating partnership	—			3,719
Distributions declared	—			(6,476		)
Redemption of operating partnership units	(18,000	)		(598		)
Adjustments to redeemable noncontrolling interests – operating partnership	—			(5,878		)
Balance at March 31, 2015	15,419,237			$	503,901
The following is a summary of activity for redeemable partnership units for the three months ended March 31, 2015 (dollars in thousands):
	OP Units
	Number			Amount
Balance at December 31, 2014	15,437,237			$	513,134
Redemption of operating partnership units	(18,000	)		(598		)
Adjustments to redeemable partnership units	—			(8,635		)
Balance at March 31, 2015	15,419,237			$	503,901
Net income is allocated to controlling interests and redeemable noncontrolling interests – operating partnership in accordance with the limited partnership agreement of the Operating Partnership. The following is a summary of net income attributable to controlling interests and transfers to redeemable noncontrolling interests – operating partnership for the three months ended March 31, 2015 and 2014 (dollars in thousands):
	Three months ended March 31,
	2015				2014
Net income attributable to controlling interests	$	22,614			$	26,856
Transfers from noncontrolling interests:
Net change in the Company’s common stock and additional paid in capital due to the redemption of OP units and other adjustments to redeemable noncontrolling interests – operating partnership	6,476				11,434
	$	29,090			$	38,290
Earnings Per Share of DFT
Basic earnings per share is calculated by dividing the net income attributable to common shares for the period by the weighted average number of common shares outstanding during the period using the two class method. Diluted earnings per share is calculated by dividing the net income attributable to common shares for the period by the weighted average number of common and dilutive securities outstanding during the period using the two class method.
Earnings Per Unit of the Operating Partnership
Basic earnings per unit is calculated by dividing the net income attributable to common units for the period by the weighted average number of common units outstanding during the period using the two class method. Diluted earnings per unit is calculated by dividing the net income attributable to common units for the period by the weighted average number of common and dilutive securities outstanding during the period using the two class method.
Stock-based Compensation
We award stock-based compensation to employees and members of our Board of Directors in the form of common stock. For each stock award granted by DFT, the OP issues an equivalent common unit, which may be referred to herein as a common share, common stock, or a common unit. We estimate the fair value of the awards and recognize this value over the requisite service period. The fair value of restricted stock-based compensation is based on the market value of DFT’s common stock on the date of the grant. The fair value of options to purchase common stock is based on the Black-Scholes model. The fair value of performance units is based on a Monte Carlo simulation.
Recently Issued Accounting Pronouncements
In March 2015, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2015-03, Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs, which will change the presentation of debt issuance costs on our consolidated balance sheet. The new guidance requires that deferred financing costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the debt liability rather than as an asset. We will be required to apply ASU 2015-03 in the first quarter of 2016 and apply the guidance retrospectively to all prior periods presented.
In May 2014, the Financial Accounting Standards Board issued a comprehensive new revenue recognition standard that will supersede nearly all existing revenue recognition guidance under GAAP. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. We will be required to apply the new standard in the first quarter of 2017 and are assessing whether the new standard will have a material effect on our financial position or results of operations.

3_Real_Estate_Assets

3. Real Estate Assets	3 Months Ended
	Mar. 31, 2015
Real Estate [Abstract]
Real Estate Disclosure [Text Block]	Real Estate Assets
	The following is a summary of our properties as of March 31, 2015 (dollars in thousands):
	Property	Location		Land		Buildings and		Construction		Total Cost
						Improvements		in Progress
								and Land Held
								for
								Development
	ACC2	Ashburn, VA		$	2,500	$	159,199			$	161,699
	ACC3	Ashburn, VA		1,071		95,978				97,049
	ACC4	Ashburn, VA		6,600		538,557				545,157
	ACC5	Ashburn, VA		6,443		298,708				305,151
	ACC6	Ashburn, VA		5,518		216,697				222,215
	ACC7 Phase I	Ashburn, VA		2,787		94,077				96,864
	VA3	Reston, VA		9,000		178,362				187,362
	VA4	Bristow, VA		6,800		149,250				156,050
	CH1	Elk Grove Village, IL		23,611		358,412				382,023
	NJ1 Phase I	Piscataway, NJ		4,311		210,136				214,447
	SC1 Phase I and IIA	Santa Clara, CA		15,152		325,587				340,739
				83,793		2,624,963		—		2,708,756
	Construction in progress and land held for development	(1	)					410,870		410,870
				$	83,793	$	2,624,963	$	410,870	$	3,119,626
	-1	Properties located in Ashburn, VA (ACC7 Phases II-IV and ACC8); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2) and Santa Clara, CA (SC1 Phase IIB and SC2).

4_Debt

4. Debt	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Debt
	Debt Summary as of March 31, 2015 and December 31, 2014
	($ in thousands)
		March 31, 2015													December 31, 2014
		Amounts				% of Total			Rates			Maturities			Amounts
												(years)
	Secured	$	115,000			10	%		1.7	%		3			$	115,000
	Unsecured	1,000,000				90	%		4.2	%		5.4			910,000
	Total	$	1,115,000			100	%		3.9	%		5.2			$	1,025,000
	Fixed Rate Debt:
	Unsecured Notes due 2021	$	600,000			54	%		5.9	%		6.5			$	600,000
	Fixed Rate Debt	600,000				54	%		5.9	%		6.5			600,000
	Floating Rate Debt:
	Unsecured Credit Facility	150,000				14	%		1.7	%		3.1			60,000
	Unsecured Term Loan	250,000				22	%		1.7	%		4.3			250,000
	ACC3 Term Loan	115,000				10	%		1.7	%		3			115,000
	Floating Rate Debt	515,000				46	%		1.7	%		3.7			425,000
	Total	$	1,115,000			100	%		3.9	%		5.2			$	1,025,000
	Outstanding Indebtedness
	ACC3 Term Loan
	We have a $115 million term loan facility (the “ACC3 Term Loan”) that is secured by our ACC3 data center facility and an assignment of the lease agreement between us and the customer of ACC3. The borrower, one of our subsidiaries, may elect to have borrowings under the ACC3 Term Loan bear interest at (i) LIBOR plus 1.55% or (ii) a base rate, which is based on the lender's prime rate, plus 0.55%. The interest rate is currently at LIBOR plus 1.55%. The ACC3 Term Loan matures on March 27, 2018, and we may prepay the ACC3 Term Loan at any time, in whole or in part, without penalty or premium. The Operating Partnership has guaranteed the outstanding principal amount of the ACC3 Term Loan, plus interest and certain costs under the loan.
	The ACC3 Term Loan imposes financial maintenance covenants relating to, among other things, the following matters:
	•	consolidated total indebtedness of the Operating Partnership not exceeding 60% of gross asset value of the Operating Partnership;
	•	fixed charge coverage ratio of the Operating Partnership being not less than 1.70 to 1.00;
	•	tangible net worth of the Operating Partnership being not less than $1.3 billion plus 80% of the sum of (i) net equity offering proceeds and (ii) the value of equity interests issued in connection with a contribution of assets to the Operating Partnership or its subsidiaries; and
	•	debt service coverage ratio of the borrower not less than 1.50 to 1.00.
	We were in compliance with all of the covenants under the loan as of March 31, 2015.
	Unsecured Term Loan
	We have an unsecured term loan facility (the "Unsecured Term Loan"), which has a total commitment and amount outstanding of $250 million. The Unsecured Term Loan matures on July 21, 2019, and we may prepay the facility at any time, in whole or in part, without penalty or premium.
	Under the terms of the Unsecured Term Loan, we may elect to have borrowings under the loan bear interest at either LIBOR or a base rate, which is based on the lender's prime rate, in each case plus an applicable margin. Prior to our receiving an investment grade credit rating, the applicable margin added to LIBOR and the base rate is based on the table below.
					Applicable Margin
	Pricing Level		Ratio of Total Indebtedness to Gross Asset Value		LIBOR Rate Loans			Base Rate Loans
	Level 1		Less than or equal to 35%		1.5	%		0.5	%
	Level 2		Greater than 35% but less than or equal to 40%		1.6	%		0.6	%
	Level 3		Greater than 40% but less than or equal to 45%		1.75	%		0.75	%
	Level 4		Greater than 45% but less than or equal to 52.5%		1.9	%		0.9	%
	Level 5		Greater than 52.5%		2.1	%		1.1	%
	The applicable margin is currently set at pricing level 1. The terms of the Unsecured Term Loan also provide that, in the event we receive an investment grade credit rating, borrowings under the loan will bear interest based on the table below.
					Applicable Margin
	Credit Rating Level		Credit Rating		LIBOR Rate Loans			Base Rate Loans
	Level 1		Greater than or equal to A- by S&P or A3 by Moody’s		0.825	%		0	%
	Level 2		Greater than or equal to BBB+ by S&P or Baa1 by Moody’s		0.875	%		0	%
	Level 3		Greater than or equal to BBB by S&P or Baa2 by Moody’s		1	%		0	%
	Level 4		Greater than or equal to BBB- by S&P or Baa3 by Moody’s		1.25	%		0.25	%
	Level 5		Less than BBB- by S&P or Baa3 by Moody’s		1.65	%		0.65	%
	Following the receipt of such investment grade rating, the terms of the loan provide for the adjustment of the applicable margin from time to time according to the rating then in effect.
	The Unsecured Term Loan is unconditionally guaranteed jointly and severally, on a senior unsecured basis by DFT and the direct and indirect subsidiaries of DFT that guaranty the obligations of the Unsecured Credit Facility (as defined below).
	The Unsecured Term Loan requires that we comply with various covenants that are substantially the same as those applicable under the Unsecured Credit Facility, including with respect to restrictions on liens, incurring indebtedness, making investments, effecting mergers and/or asset sales, and certain restrictions on dividend payments. In addition, the Unsecured Term Loan imposes financial maintenance covenants substantially the same as those under the Unsecured Credit Facility relating to, among other things, the following matters:
	•	unsecured debt not exceeding 60% of the value of unencumbered assets;
	•	net operating income generated from unencumbered properties divided by the amount of unsecured debt being not less than 12.5%;
	•	total indebtedness not exceeding 60% of gross asset value;
	•	fixed charge coverage ratio being not less than 1.70 to 1.00; and
	•	tangible net worth being not less than $1.3 billion plus 80% of the sum of (i) net equity offering proceeds after March 21, 2012 and (ii) the value of equity interests issued in connection with a contribution of assets to the Operating Partnership or its subsidiaries after March 21, 2012.
	The Unsecured Term Loan includes customary events of default, the occurrence of which, following any applicable cure period, would permit the lenders to, among other things, declare the principal, accrued interest and other obligations under the loan to be immediately due and payable.
	We were in compliance with all of the covenants under the loan as of March 31, 2015.
	Unsecured Notes due 2021
	On September 24, 2013, the Operating Partnership completed the sale of $600 million of 5.875% unsecured notes due 2021 (the "Unsecured Notes due 2021"). The Unsecured Notes due 2021 were issued at face value and mature on September 15, 2021. We pay interest on the Unsecured Notes due 2021 semi-annually, in arrears, on March 15th and September 15th of each year.
	The Unsecured Notes due 2021 are unconditionally guaranteed, jointly and severally on a senior unsecured basis by DFT and certain of the Operating Partnership’s subsidiaries, including the subsidiaries that own the ACC2, ACC4, ACC5, ACC6, VA3, VA4, CH1, NJ1 and SC1 data centers and the SC2 land (collectively, the “Subsidiary Guarantors”), but excluding the subsidiaries that own the ACC3 and ACC7 data center facilities, the CH2 data center under development, the ACC8 land, our taxable REIT subsidiary, DF Technical Services, LLC and our property management subsidiary, DF Property Management LLC.
	The Unsecured Notes due 2021 rank (i) equally in right of payment with all of the Operating Partnership's existing and future senior unsecured indebtedness, (ii) senior in right of payment with all of its existing and future subordinated indebtedness, (iii) effectively subordinate to any of the Operating Partnership's existing and future secured indebtedness and (iv) effectively junior to any liabilities of any subsidiaries of the Operating Partnership that do not guarantee the Unsecured Notes due 2021. The guarantees of the Unsecured Notes due 2021 by DFT and the Subsidiary Guarantors rank (i) equally in right of payment with such guarantor's existing and future senior unsecured indebtedness, (ii) senior in right of payment with all of such guarantor's existing and future subordinated indebtedness and (iii) effectively subordinate to any of such guarantor's existing and future secured indebtedness.
	At any time prior to September 15, 2016, the Operating Partnership may redeem the Unsecured Notes due 2021, in whole or in part, at a price equal to the sum of (i) 100% of the principal amount of the Unsecured Notes due 2021 to be redeemed, plus (ii) a make-whole premium and accrued and unpaid interest. The Unsecured Notes due 2021 may be redeemed at the Operating Partnership's option, in whole or in part, at any time, on and after September 15, 2016 at the following redemption prices (expressed as percentages of the principal amount thereof) if redeemed during the 12-month period commencing September 15 of the years indicated below, in each case together with accrued and unpaid interest to the date of redemption:
	Year	Redemption Price
	2016	104.406	%
	2017	102.938	%
	2018	101.469	%
2019 and thereafter	100	%
If there is a change of control (as defined in the indenture governing the Unsecured Notes due 2021) of the Operating Partnership or DFT, we must offer to purchase the Unsecured Notes due 2021 at a price equal to 101% of the principal amount thereof, plus accrued and unpaid interest. In addition, in certain circumstances we may be required to use the net proceeds of asset sales to purchase a portion of the Unsecured Notes due 2021 at 100% of the principal amount thereof, plus accrued and unpaid interest.
The Unsecured Notes due 2021 have certain covenants limiting or prohibiting the ability of the Operating Partnership and certain of its subsidiaries from, among other things, (i) incurring secured or unsecured indebtedness, (ii) entering into sale and leaseback transactions, (iii) making certain dividend payments, distributions, purchases of DFT's common stock and investments, (iv) entering into transactions with affiliates, (v) entering into agreements limiting the ability to make certain transfers and other payments from subsidiaries, (vi) engaging in sales of assets or (vii) engaging in certain mergers, consolidations or transfers/sales of all or substantially all assets. However, DFT may pay the minimum dividend necessary to meet its REIT income distribution requirements.
The Unsecured Notes due 2021 also require the Operating Partnership and the Subsidiary Guarantors to maintain total unencumbered assets of at least 150% of their unsecured debt on a consolidated basis. The Unsecured Notes due 2021 also have customary events of default, including, but not limited to, nonpayment, breach of covenants, and payment or acceleration defaults in certain other indebtedness of ours or certain of our subsidiaries. Upon an event of default, the holders of the Unsecured Notes due 2021 or the trustee may declare the Unsecured Notes due 2021 due and immediately payable. We were in compliance with all covenants under the Unsecured Notes due 2021 as of March 31, 2015.
Unsecured Credit Facility
We have an unsecured revolving credit facility ("Unsecured Credit Facility") with a total commitment of $560 million. The Unsecured Credit Facility matures on May 13, 2018 and includes a one-year extension option, subject to the payment of an extension fee equal to 15 basis points on the total commitment in effect on such initial maturity date and certain other customary conditions. At our option, we may increase the total commitment under the facility to $800 million, if one or more lenders commit to being a lender for the additional amount and certain other customary conditions are met. We may also prepay the facility at any time, in whole or in part, without penalty or premium.
We may elect to have borrowings under the facility bear interest at either LIBOR or a base rate, which is based on the lender's prime rate, in each case plus an applicable margin. Prior to our receiving an investment grade credit rating, the applicable margin added to LIBOR and the base rate is based on the table below.
				Applicable Margin
Pricing Level		Ratio of Total Indebtedness to Gross Asset Value		LIBOR Rate Loans			Base Rate Loans
Level 1		Less than or equal to 35%		1.55	%		0.55	%
Level 2		Greater than 35% but less than or equal to 40%		1.65	%		0.65	%
Level 3		Greater than 40% but less than or equal to 45%		1.8	%		0.8	%
Level 4		Greater than 45% but less than or equal to 52.5%		1.95	%		0.95	%
Level 5		Greater than 52.5%		2.15	%		1.15	%
The applicable margin is currently set at pricing level 1. The terms of the facility provide for the adjustment of the applicable margin from time to time according to the ratio of the Operating Partnership’s total indebtedness to gross asset value in effect from time to time.
In the event we receive an investment grade credit rating, borrowings under the facility will bear interest based on the table below.
				Applicable Margin
Credit Rating Level		Credit Rating		LIBOR Rate Loans			Base Rate Loans
Level 1		Greater than or equal to A- by S&P or A3 by Moody’s		0.875	%		0	%
Level 2		Greater than or equal to BBB+ by S&P or Baa1 by Moody’s		0.925	%		0	%
Level 3		Greater than or equal to BBB by S&P or Baa2 by Moody’s		1.05	%		0.05	%
Level 4		Greater than or equal to BBB- by S&P or Baa3 by Moody’s		1.3	%		0.3	%
Level 5		Less than BBB- by S&P or Baa3 by Moody’s		1.7	%		0.7	%
Following the receipt of such investment grade rating, the terms of the facility provide for the adjustment of the applicable margin from time to time according to the rating then in effect.
The facility is unconditionally guaranteed, jointly and severally, on a senior unsecured basis by DFT and all of the Operating Partnership’s subsidiaries that currently guaranty the obligations under the Unsecured Notes due 2021, listed above.
The amount available for borrowings under the facility is determined according to a calculation comparing the value of certain unencumbered properties designated by the Operating Partnership at such time relative to the amount of the Operating Partnership's unsecured debt. Up to $35 million of the borrowings under the facility may be used for letters of credit.
As of March 31, 2015, a letter of credit totaling less than $0.1 million was outstanding under the facility. As of March 31, 2015, $150.0 million of borrowings were outstanding under this facility. As of May 7, 2015, $180.0 million of borrowings were outstanding under this facility.
The facility requires that DFT, the Operating Partnership and their subsidiaries comply with various covenants, including with respect to restrictions on liens, incurring indebtedness, making investments, effecting mergers and/or asset sales, and certain limits on dividend payments, distributions and purchases of DFT's stock. In addition, the facility imposes financial maintenance covenants relating to, among other things, the following matters:
•	unsecured debt not exceeding 60% of the value of unencumbered assets;
•	net operating income generated from unencumbered properties divided by the amount of unsecured debt being not less than 12.5%;
•	total indebtedness not exceeding 60% of gross asset value;
•	fixed charge coverage ratio being not less than 1.70 to 1.00; and
•	tangible net worth being not less than $1.3 billion plus 80% of the sum of (i) net equity offering proceeds after March 21, 2012 and (ii) the value of equity interests issued in connection with a contribution of assets to the Operating Partnership or its subsidiaries.
The facility includes customary events of default, the occurrence of which, following any applicable cure period, would permit the lenders to, among other things, declare the principal, accrued interest and other obligations of the Operating Partnership under the facility to be immediately due and payable. We were in compliance with all covenants under the facility as of March 31, 2015.
A summary of our debt maturity schedule as of March 31, 2015 is as follows:
Debt Maturity as of March 31, 2015
($ in thousands)
Year		Fixed Rate					Floating Rate					Total				% of Total		Rates
2015		$	—				$	—				$	—			—		—
2016		—					3,750			-2		3,750				0.3	%	1.7	%
2017		—					8,750			-2		8,750				0.8	%	1.7	%
2018		—					252,500			(2)(3)		252,500				22.7	%	1.7	%
2019		—					250,000			-4		250,000				22.4	%	1.7	%
2020		—					—					—				—		—
2021		600,000			-1		—					600,000				53.8	%	5.9	%
Total		$	600,000				$	515,000				$	1,115,000			100	%	3.9	%
-1	The 5.875% Unsecured Notes due 2021 mature on September 15, 2021.
-2	The ACC3 Term Loan matures on March 27, 2018 with no extension option. Quarterly principal payments of $1.25 million begin on April 1, 2016, increase to $2.5 million on April 1, 2017 and continue through maturity.
-3	The Unsecured Credit Facility matures on May 13, 2018 with a one-year extension option.
-4	The Unsecured Term Loan matures on July 21, 2019 with no extension option.

5_Commitments_and_Contingencie

5. Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingencies
	We are involved from time to time in various legal proceedings, lawsuits, examinations by various tax authorities and claims that have arisen in the ordinary course of business. We currently believe that the resolution of such matters will not have a material adverse effect on our financial condition or results of operations.
	Contracts related to the development of the SC1 Phase IIB, CH2 Phase I and ACC7 Phase II data centers were in place as of March 31, 2015. These contracts are cost plus in nature whereby the contract sum is the aggregate of the actual work performed and equipment purchased plus a contractor fee. Control estimates, which are adjusted from time to time to reflect any contract changes, are estimates of the total contract cost at completion. As of March 31, 2015, the SC1 Phase IIB control estimate was $55.2 million, of which $48.8 million has been incurred. An additional $1.6 million has been committed under this contract as of March 31, 2015. As of March 31, 2015, the CH2 Phase I control estimate was $165.1 million, of which $130.3 million has been incurred. An additional $21.0 million has been committed under this contract as of March 31, 2015. As of March 31, 2015, the ACC7 Phase II control estimate was $39.1 million, of which $1.8 million has been incurred. An additional $12.6 million has been committed under this contract as of March 31, 2015.
	In February 2015, we entered into two purchase agreements under which we will acquire two parcels of undeveloped land in Ashburn, Virginia, from entities controlled by Lammot J. du Pont, our Chairman of the Board, and Hossein Fateh, our Vice Chairman of the Board.
	One agreement relates to the purchase of a 34.8 acre site that is adjacent to the Ashburn Corporate Center, where our ACC2, ACC3, ACC4, ACC5, ACC6 and ACC7 data center facilities are located, for a total purchase price of $15.5 million. The sole managers of the entity that owns this site are a limited liability company owned solely by Mr. du Pont, which also owns approximately 7% of the seller, and a limited liability company owned solely by Mr. Fateh, which also owns approximately 1% of the seller.
	The other agreement relates to the purchase of an 8.7 acre site that is part of the Ashburn Corporate Center and adjacent to our ACC4 and ACC7 data center facilities for a total purchase price of $4.6 million. Mssrs. du Pont and Fateh are the sole managers of the limited liability company that manages the entity that owns this site. Mr. du Pont directly and indirectly owns approximately 23% of the seller, and Mr. Fateh directly and indirectly owns approximately 18% of the seller. In addition, Frederic V. Malek, one of our independent directors, is a non-managing member of the entity that owns this site. Mr. Malek’s sole interest in this entity is the ownership of an approximately 4% non-managing membership interest; he is neither an employee nor an executive officer of this entity. The purchase price for each site was based on an appraisal prepared by an independent appraisal firm.
	Concurrent with DFT’s October 2007 initial public offering, we entered into tax protection agreements with some of the contributors of the initial properties including DFT’s Chairman and Vice Chairman of the Board. Pursuant to the terms of these agreements, if we dispose of any interest in the initial contributed properties that generates more than a certain allowable amount of built-in gain for the contributors, as a group, in any single year through 2017, we will indemnify the contributors for a portion of the tax liabilities incurred with respect to the amount of built-in gain and tax liabilities incurred as a result of the reimbursement payment. The amount of initial built-in gain that can be recognized as of January 1, 2015 without triggering the tax protection provisions is approximately 80% of the initial built in gain of $667 million (unaudited), or $534 million (unaudited). This percentage increases each year by 10%, accumulating to 100% in 2017. As of March 31, 2015, none of the tax protection provisions had been triggered and no liability has been recorded on our consolidated balance sheet. If, as of January 1, 2015, the tax protection provisions were triggered, we could be liable for protection on the taxes related to up to approximately $12 million (unaudited) of built-in gain. Additionally, pursuant to the terms of these agreements, we must provide an opportunity for certain of the contributors of the initial properties to guarantee a secured loan and, if we fail to do so, we could be liable for protection on the taxes related to approximately $97 million (unaudited) of remaining minimum liability. The amount of our liability for protection on taxes could be based on the highest federal, state and local capital gains tax rates of the applicable contributor. Any sale by the Company that requires payments to any of DFT’s executive officers or directors pursuant to these agreements requires the approval of at least 75% of the disinterested members of DFT’s Board of Directors.

6_Redeemable_noncontrolling_in

6. Redeemable noncontrolling interests operating partnership / Redeemable partnership units	3 Months Ended
	Mar. 31, 2015
Redeemable noncontrolling interests – operating partnership / Redeemable partnership units [Abstract]
Redeemable noncontrolling interests – operating partnership / Redeemable partnership units [Text Block]	Redeemable noncontrolling interests – operating partnership / Redeemable partnership units
	Redeemable noncontrolling interests – operating partnership, as presented in DFT’s accompanying consolidated balance sheets, represent the OP units held by individuals and entities other than DFT. These interests are also presented in the Operating Partnership’s consolidated balance sheets, referred to as “redeemable partnership units.” Accordingly, the following discussion related to redeemable noncontrolling interests – operating partnership of DFT refers equally to redeemable partnership units of the Operating Partnership.
	The redemption value of redeemable noncontrolling interests – operating partnership as of March 31, 2015 and December 31, 2014 was $503.9 million and $513.1 million, respectively, based on the closing share price of DFT’s common stock of $32.68 and $33.24, respectively, on those dates.
	Holders of OP units are entitled to receive distributions in a per unit amount equal to the per share dividends made with respect to each share of DFT’s common stock, if and when DFT’s Board of Directors declares such a dividend. Holders of OP units have the right to tender their units for redemption, in an amount equal to the fair market value of DFT’s common stock. DFT may elect to redeem tendered OP units for cash or for shares of DFT’s common stock. During the three months ended March 31, 2015, OP unitholders redeemed a total of 18,000 OP units in exchange for an equal number of shares of common stock. See Note 2.

7_Preferred_Stock

7. Preferred Stock	3 Months Ended
	Mar. 31, 2015
Preferred Stock [Abstract]
Preferred Stock [Text Block]	Preferred Stock
	Series A Preferred Stock
	In October 2010, DFT issued 7,400,000 shares of 7.875% Series A Cumulative Redeemable Perpetual Preferred Stock (“Series A Preferred Stock”) for $185.0 million in an underwritten public offering. The liquidation preference on the Series A Preferred Stock is $25 per share and dividends are scheduled quarterly. For each share of Series A Preferred Stock issued by DFT, the Operating Partnership issued a preferred unit equivalent to DFT with the same terms.
	In 2015, DFT declared and paid the following cash dividends on its Series A Preferred Stock, of which the OP paid equivalent distributions on its preferred units:
	•	$0.4921875 per share payable to stockholders of record as of April 2, 2015. This dividend was paid on April 15, 2015.
	Series B Preferred Stock
	In March 2011 and January 2012, DFT issued an aggregate of 6,650,000 shares of 7.625% Series B Cumulative Redeemable Perpetual Preferred Stock (“Series B Preferred Stock”) for $166.3 million in underwritten public offerings. The liquidation preference on the Series B Preferred Stock is $25 per share and dividends are scheduled quarterly. For each share of Series B Preferred Stock issued by DFT, the Operating Partnership issued a preferred unit equivalent to DFT with the same terms.
	In 2015, DFT declared and paid the following cash dividends on its Series B Preferred Stock, of which the OP paid equivalent distributions on its preferred units:
	•	$0.4765625 per share payable to stockholders of record as of April 2, 2015. This dividend was paid on April 15, 2015.

8_Stockholders_Equity_of_the_R

8. Stockholders Equity of the REIT and Partners Capital of the OP	3 Months Ended
	Mar. 31, 2015
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Abstract]
Stockholders' Equity Of The REIT And Partners' Capital Of The OP [Text Block]	Stockholders’ Equity of DFT and Partners’ Capital of the OP
	In 2015, DFT declared and paid the following cash dividend per share on its common stock, of which the OP paid an equivalent distribution on OP units:
	•	$0.42 per share payable to stockholders of record as of April 2, 2015. This dividend was paid on April 15, 2015.
	In December 2014, the Board of Directors approved a common stock repurchase program to acquire up to $120.0 million of DFT's common stock in 2015. This program was announced on February 5, 2015, and will expire on December 31, 2015. During the three months ended March 31, 2015, DFT repurchased 1,002,610 shares of its common stock, and $88.1 million is still available for repurchase under the program. All repurchased shares were retired immediately, and the OP retired an equivalent number of units.
	In connection with the departure of our former chief executive officer, Hossein Fateh, in February 2015, DFT issued the following shares of common stock during the three months ended March 31, 2015, of which the OP issued an equivalent number of units to the REIT:
	•	an award of 55,742 shares of fully vested common stock with a fair value of $1.8 million on the grant date, which was expensed during the three months ended March 31, 2015,
	•	346 shares of fully vested common stock as consideration for Mr. Fateh's continuing service as Vice Chairman of the Board of Directors with a fair value of less than $0.1 million on the grant date, and
	•	320,676 shares of fully vested common stock in connection with the accelerated vesting of certain unvested performance units held by Mr. Fateh. $1.9 million was expensed during the three months ended March 31, 2015 related to the accelerated vesting of these performance units.
	Furthermore, $0.3 million was expensed during the three months ended March 31, 2015 in connection with the accelerated vesting of certain unvested stock options held by Mr. Fateh. Mr. Fateh is also entitled to receive a cash severance payment of $1.3 million which was expensed during the three months ended March 31, 2015 and will be paid six months following his separation date.

9_Equity_Compensation_Plan

9. Equity Compensation Plan	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	Equity Compensation Plan
	In May 2011, our Board of Directors adopted the 2011 Equity Incentive Plan (the “2011 Plan”) following approval from our stockholders. The 2011 Plan is administered by the Compensation Committee of our Board of Directors. The 2011 Plan allows us to provide equity-based compensation to our personnel and directors in the form of stock options, stock appreciation rights, dividend equivalent rights, restricted stock, restricted stock units, performance-based awards, unrestricted stock, long term incentive units (“LTIP units”) and other awards.
	The 2011 Plan authorizes a maximum aggregate of 6,300,000 share equivalents be reserved for future issuances. In addition, shares that were awarded under our 2007 Equity Compensation Plan (the “2007 Plan”) that subsequently become available due to forfeitures of such awards are available for issuance under the 2011 Plan.
	The 2011 Plan provides that awards can no longer be made under the 2007 Plan. Furthermore, under the 2011 Plan, shares of common stock that are subject to awards of options or stock appreciation rights will be counted against the 2011 Plan share limit as one share for every one share subject to the award. Any shares of stock that are subject to awards other than options or stock appreciation rights shall be counted against the 2011 Plan share limit as 2.36 shares for every one share subject to the award.
	As of March 31, 2015, 3,198,419 share equivalents were issued under the 2011 Plan, and the maximum aggregate amount of share equivalents remaining available for future issuance was 3,101,581.
	Restricted Stock
	Restricted stock awards vest over specified periods of time as long as the employee remains employed with the Company. The following table sets forth the number of unvested shares of restricted stock and the weighted average fair value of these shares at the date of grant:
		Shares of			Weighted Average
		Restricted Stock			Fair Value at
					Date of Grant
	Unvested balance at December 31, 2014	323,989			$	24.1
	Granted	153,655			$	32.26
	Vested	(124,197	)		$	23.78
	Forfeited	(888	)		$	24.61
	Unvested balance at March 31, 2015	352,559			$	27.76
	During the three months ended March 31, 2015, we issued 153,655 shares of restricted stock, which had an aggregate value of $5.0 million on the grant date. This amount will be amortized to expense over the respective vesting periods, which are typically three years. Also during the three months ended March 31, 2015, 124,197 shares of restricted stock vested at a value of $3.9 million on the respective vesting dates.
	As of March 31, 2015, total unearned compensation on restricted stock was $9.0 million, and the weighted average vesting period was 1.7 years.
	Stock Options
	Stock option awards are granted with an exercise price equal to the closing market price of DFT’s common stock at the date of grant and vest over specified periods of time as long as the employee remains employed with the Company. All shares to be issued upon option exercises will be newly issued shares and the options have 10-year contractual terms. During the three months ended March 31, 2015, no options were granted to employees.
	A summary of our stock option activity under the applicable equity incentive plan for the three months ended March 31, 2015 is presented in the tables below.
		Number of			Weighted Average
		Options			Exercise Price
	Under option, December 31, 2014	1,592,854			$	19.09
	Granted	—			$	—
	Exercised	—			$	—
	Forfeited	—			$	—
	Under option, March 31, 2015	1,592,854			$	19.09
		Shares Subject			Total Unearned			Weighted Average		Weighted Average
		to Option			Compensation			Vesting Period		Remaining
										Contractual Term
	As of March 31, 2015	1,592,854			$	0.2	million	0.9 years		5.9 years
	The following table sets forth the number of unvested options as of March 31, 2015 and the weighted average fair value of these options at the grant date.
		Number of			Weighted Average
		Options			Fair Value
					at Date of Grant
	Unvested balance at December 31, 2014	302,324			$	5.05
	Granted	—			$	—
	Vested	(256,536	)		$	5.11
	Forfeited	—			$	—
	Unvested balance at March 31, 2015	45,788			$	4.75
	The following tables sets forth the number of exercisable options as of March 31, 2015 and the weighted average fair value and exercise price of these options at the grant date.
		Number of			Weighted Average
		Options			Fair Value
					at Date of Grant
	Options Exercisable at December 31, 2014	1,290,530			$	5.74
	Vested	256,536			$	5.11
	Exercised	—			$	—
	Options Exercisable at March 31, 2015	1,547,066			$	5.63
		Exercisable			Intrinsic Value			Weighted Average			Weighted Average
		Options						Exercise Price			Remaining
											Contractual Term
	As of March 31, 2015	1,547,066			$	21.2	million	$	18.99		5.9 years
	Performance Units
	Performance unit awards are awarded to certain executive employees and have a three calendar-year performance period with no dividend rights. Performance units will be settled in common shares following the performance period as long as the employee remains employed with us on the vesting date, which is the March 1st date following the last day of the applicable performance period. Performance units are valued using a Monte Carlo simulation and are amortized over the three year vesting period from the grant date to the vesting date. The number of common shares settled could range from 0% to 300%. For performance unit award grants prior to 2014, the vesting amount is dependent on DFT’s total stockholder return compared to the MSCI US REIT index over the three calendar-year performance period.
	For performance unit grants awarded in 2014 and 2015, one-half of the recipient's performance unit award is dependent on DFT’s total stockholder return compared to the MSCI US REIT index over the three calendar-year performance period. The other half of the performance unit award is dependent on DFT’s total stockholder return compared to an index of five comparable publicly traded data center companies over the three calendar-year performance period. The following table summarizes the assumptions used to value, and the resulting fair and maximum values of, the performance units granted during the three months ended March 31, 2015.
		Assumption
	Number of performance units granted	48,674
	Expected volatility	24		%
	Expected annual dividend	5.18		%
	Risk-free rate	1.06		%
	Performance unit fair value at date of grant	$	38.34
	Total grant fair value at date of grant	$1.9 million
	Maximum value of grant on vesting date based on closing price of DFT's stock at the date of grant	$4.7 million
	During three months ended March 31, 2015, no performance units were forfeited. As of March 31, 2015, total unearned compensation on outstanding performance units was $2.8 million.
For the performance units granted in 2012, based on DFT’s total stockholder return compared to the MSCI US REIT
index return for the period from January 1, 2012 to January 1, 2015, no common shares were issued upon their vesting on
March 31, 2015.

10_Earnings_Per_Share_of_the_R

10. Earnings Per Share of the REIT	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Earnings Per Share of DFT
	The following table sets forth the reconciliation of basic and diluted average shares outstanding used in the computation of earnings per share of common stock (in thousands except for share and per share amounts):
		Three months ended March 31,
		2015				2014
	Basic and Diluted Shares Outstanding
	Weighted average common shares – basic	65,506,028				65,348,269
	Effect of dilutive securities	950,243				475,652
	Weighted average common shares – diluted	66,456,271				65,823,921
	Calculation of Earnings per Share – Basic
	Net income attributable to common shares	$	15,803			$	20,045
	Net income allocated to unvested restricted shares	(147		)		(116		)
	Net income attributable to common shares, adjusted	15,656				19,929
	Weighted average common shares – basic	65,506,028				65,348,269
	Earnings per common share – basic	$	0.24			$	0.3
	Calculation of Earnings per Share – Diluted
	Net income attributable to common shares	$	15,656			$	20,045
	Adjustments to redeemable noncontrolling interests	—				27
	Adjusted net income available to common shares	15,656				20,072
	Weighted average common shares – diluted	66,456,271				65,823,921
	Earnings per common share – diluted	$	0.24			$	0.3
	The following table sets forth the number of stock options and performance units that have been excluded from the calculation of diluted earnings per share as their effect would have been antidilutive (in millions):
		Three months ended March 31,
		2015			2014
	Stock Options	—			0.3
	Performance Units	—			0.2

11_Earnings_Per_Unit_of_the_Op

11. Earnings Per Unit of the Operating Partnership	3 Months Ended
	Mar. 31, 2015
Earnings Per Unit [Abstract]
Earnings per unit of the Operating Partnership [Text Block]	Earnings Per Unit of the Operating Partnership
	The following table sets forth the reconciliation of basic and diluted average units outstanding used in the computation of earnings per unit:
		Three months ended March 31,
		2015	2014
	Basic and Diluted Units Outstanding
	Weighted average common units – basic (includes redeemable partnership units and units of general and limited partners)	80,926,265	80,956,206
	Effect of dilutive securities	950,243	475,652
	Weighted average common units – diluted	81,876,508	81,431,858
	The following table sets forth the number of stock options and performance units that have been excluded from the calculation of diluted earnings per unit as their effect would have been antidilutive (in millions):
		Three months ended March 31,
		2015	2014
	Stock Options	—	0.3
	Performance Units	—	0.2

12_Fair_Value

12. Fair Value	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Fair Value
	Assets and Liabilities Measured at Fair Value
	The authoritative guidance issued by the Financial Accounting Standards Board requires disclosure of the fair value of financial instruments. Fair value estimates are subjective in nature and are dependent on a number of important assumptions, including estimates of future cash flows, risks, discount rates, and relevant comparable market information associated with each financial instrument. The use of different market assumptions and estimation methodologies may have a material effect on the reported estimated fair value amounts. Accordingly, the amounts are not necessarily indicative of the amounts we would realize in a current market exchange.
	The following methods and assumptions were used in estimating the fair value amounts and disclosures for financial instruments as of March 31, 2015:
	•	Cash and cash equivalents: The carrying amount of cash and cash equivalents reported in the accompanying consolidated balance sheets approximates fair value because of the short maturity of these instruments (i.e., less than 90 days).
	•	Rents and other receivables, accounts payable and accrued liabilities, and prepaid rents: The carrying amount of these assets and liabilities reported in the accompanying consolidated balance sheets approximates fair value because of the short-term nature of these amounts.
	•	Debt: The combined balance of our Unsecured Notes due 2021, Unsecured Term Loan, Unsecured Credit Facility and ACC3 Term Loan was $1,115.0 million with a fair value of $1,137.5 million based on Level 2 data. The Unsecured Notes due 2021 were valued based on Level 2 data which consisted of a quoted price for the Unsecured Notes due 2021 from Bloomberg. Because our ACC3 Term Loan, Unsecured Credit Facility and Unsecured Term Loan were refinanced in 2014, we believe that their carrying values approximate each of their fair values as of March 31, 2015. Each of these loans bear interest at LIBOR plus a spread that is consistent with current market conditions.

13_Supplemental_Consolidating_

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes	3 Months Ended
	Mar. 31, 2015
Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes [Abstract]
Additional Financial Information Disclosure [Text Block]	13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes
	On September 24, 2013, the Operating Partnership issued the Unsecured Notes due 2021 (See Note 4). The Unsecured Notes due 2021 are unconditionally guaranteed, jointly and severally on a senior unsecured basis by DFT and certain of our subsidiaries, including the subsidiaries that own the ACC2, ACC4, ACC5, ACC6, VA3, VA4, CH1, NJ1 and SC1 data centers and the SC2 land (collectively, the "Subsidiary Guarantors"), but excluding the subsidiaries that own the ACC3 and ACC7 data center facilities, the CH2 data center under development, the ACC8 land and the TRS collectively, the "Subsidiary Non-Guarantors"). The following consolidating financial information sets forth the financial position as of March 31, 2015 and December 31, 2014 and the results of operations and cash flows for the three months ended March 31, 2015 and 2014 of the Operating Partnership, Subsidiary Guarantors and the Subsidiary Non-Guarantors.
	DUPONT FABROS TECHNOLOGY, L.P.
	SUPPLEMENTAL CONSOLIDATING BALANCE SHEETS
	(in thousands except share data)
		March 31, 2015
		Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
		Partnership			Guarantors			Non-Guarantors						Total
	ASSETS
	Income producing property:
	Land	$	—		$	79,935		$	3,858		$	—		$	83,793
	Buildings and improvements	—			2,427,990			196,973			—			2,624,963
		—			2,507,925			200,831			—			2,708,756
	Less: accumulated depreciation	—			(495,120		)	(33,419		)	—			(528,539		)
	Net income producing property	—			2,012,805			167,412			—			2,180,217
	Construction in progress and land held for development	—			152,820			258,050			—			410,870
	Net real estate	—			2,165,625			425,462			—			2,591,087
	Cash and cash equivalents	19,080			—			3,761			—			22,841
	Rents and other receivables	1,391			6,461			3,860			—			11,712
	Deferred rent	—			136,214			2,368			—			138,582
	Lease contracts above market value, net	—			7,779			—			—			7,779
	Deferred costs, net	15,192			16,366			6,471			—			38,029
	Investment in affiliates	2,582,191			—			—			(2,582,191		)	—
	Prepaid expenses and other assets	2,746			43,518			4,167			—			50,431
	Total assets	$	2,620,600		$	2,375,963		$	446,089		$	(2,582,191	)	$	2,860,461
	LIABILITIES AND PARTNERS’ CAPITAL
	Liabilities:
	Line of credit	$	150,000		$	—		$	—		$	—		$	150,000
	Mortgage notes payable	—			—			115,000			—			115,000
	Unsecured term loan	250,000			—			—			—			250,000
	Unsecured notes payable	600,000			—			—			—			600,000
	Accounts payable and accrued liabilities	3,113			19,374			6,042			—			28,529
	Construction costs payable	12			4,195			21,275			—			25,482
	Accrued interest payable	1,937			—			6			—			1,943
	Distribution payable	39,685			—			—			—			39,685
	Lease contracts below market value, net	—			6,169			—			—			6,169
	Prepaid rents and other liabilities	24			61,532			6,268			—			67,824
	Total liabilities	1,044,771			91,270			148,591			—			1,284,632
	Redeemable partnership units	503,901			—									503,901
	Commitments and contingencies	—			—			—			—			—
	Limited Partners’ Capital:
	Series A cumulative redeemable perpetual preferred units, 7,400,000 issued and outstanding at March 31, 2015	185,000			—			—			—			185,000
	Series B cumulative redeemable perpetual preferred units, 6,650,000 issued and outstanding at March 31, 2015	166,250			—			—			—			166,250
	Common units, 64,712,852 issued and outstanding at March 31, 2015	713,376			2,284,693			297,498			(2,582,191		)	713,376
	General partner’s capital, 662,373 common units issued and outstanding at March 31, 2015	7,302			—			—			—			7,302
	Total partners’ capital	1,071,928			2,284,693			297,498			(2,582,191		)	1,071,928
	Total liabilities & partners’ capital	$	2,620,600		$	2,375,963		$	446,089		$	(2,582,191	)	$	2,860,461
	DUPONT FABROS TECHNOLOGY, L.P.
	SUPPLEMENTAL CONSOLIDATING BALANCE SHEETS
	(in thousands except share data)
		December 31, 2014
		Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
		Partnership			Guarantors			Non-Guarantors						Total
	ASSETS
	Income producing property:
	Land	$	—		$	79,935		$	3,858		$	—		$	83,793
	Buildings and improvements	—			2,427,706			195,833			—			2,623,539
		—			2,507,641			199,691			—			2,707,332
	Less: accumulated depreciation	—			(473,203		)	(31,666		)	—			(504,869		)
	Net income producing property	—			2,034,438			168,025			—			2,202,463
	Construction in progress and land held for development	—			145,229			213,736			—			358,965
	Net real estate	—			2,179,667			381,761			—			2,561,428
	Cash and cash equivalents	21,806			—			3,574			—			25,380
	Rents and other receivables	1,775			5,513			825			—			8,113
Deferred rent	—			139,542			2,823			—			142,365
Lease contracts above market value, net	—			8,054			—			—			8,054
Deferred costs, net	15,957			16,098			6,440			—			38,495
Investment in affiliates	2,547,049			—			—			(2,547,049		)	—
Prepaid expenses and other assets	2,865			43,866			1,564			—			48,295
Total assets	$	2,589,452		$	2,392,740		$	396,987		$	(2,547,049	)	$	2,832,130
LIABILITIES AND PARTNERS’ CAPITAL
Liabilities:
Line of credit	$	60,000		$	—		$	—		$	—		$	60,000
Mortgage notes payable	—			—			115,000			—			115,000
Unsecured term loan	250,000			—			—			—			250,000
Unsecured notes payable	600,000			—			—			—			600,000
Accounts payable and accrued liabilities	4,432			19,580			2,961			—			26,973
Construction costs payable	—			4,312			28,637			—			32,949
Accrued interest payable	10,754			—			5			—			10,759
Distribution payable	39,981			—			—			—			39,981
Lease contracts below market value, net	—			7,037			—			—			7,037
Prepaid rents and other liabilities	28			61,728			3,418			—			65,174
Total liabilities	965,195			92,657			150,021			—			1,207,873
Redeemable partnership units	513,134			—			—			—			513,134
Commitments and contingencies	—			—			—			—			—
Limited Partners’ Capital:
Series A cumulative redeemable perpetual preferred units, 7,400,000 issued and outstanding at December 31, 2014	185,000			—			—			—			185,000
Series B cumulative redeemable perpetual preferred units, 6,650,000 issued and outstanding at December 31, 2014	166,250			—			—			—			166,250
Common units, 65,399,431 issued and outstanding at December 31, 2014	752,254			2,300,083			246,966			(2,547,049		)	752,254
General partner’s capital, 662,373 common units issued and outstanding at December 31, 2014	7,619			—			—			—			7,619
Total partners’ capital	1,111,123			2,300,083			246,966			(2,547,049		)	1,111,123
Total liabilities & partners’ capital	$	2,589,452		$	2,392,740		$	396,987		$	(2,547,049	)	$	2,832,130
	Three months ended March 31, 2015
	Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
	Partnership			Guarantors			Non-Guarantors						Total
Revenues:
Base rent	$	4,506		$	66,284		$	5,327		$	(4,544	)	$	71,573
Recoveries from tenants	—			30,824			2,481			—			33,305
Other revenues	—			426			2,027			(17		)	2,436
Total revenues	4,506			97,534			9,835			(4,561		)	107,314
Expenses:
Property operating costs	—			32,407			3,610			(4,524		)	31,493
Real estate taxes and insurance	—			3,667			309			—			3,976
Depreciation and amortization	11			23,006			2,010			—			25,027
General and administrative	4,213			15			115			—			4,343
Other expenses	5,591			—			1,699			(37		)	7,253
Total expenses	9,815			59,095			7,743			(4,561		)	72,092
Operating (loss) income	(5,309		)	38,439			2,092			—			35,222
Interest income	11			—			—			—			11
Interest:
Expense incurred	(10,614		)	981			1,375			—			(8,258		)
Amortization of deferred financing costs	(765		)	81			42			—			(642		)
Equity in earnings	43,010			—			—			(43,010		)	—
Net income	26,333			39,501			3,509			(43,010		)	26,333
Preferred unit distributions	(6,811		)	—			—			—			(6,811		)
Net income attributable to common units	$	19,522		$	39,501		$	3,509		$	(43,010	)	$	19,522
	Three months ended March 31, 2014
	Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
	Partnership			Guarantors			Non-Guarantors						Total
Revenues:
Base rent	$	4,226		$	64,966		$	4,276		$	(4,264	)	$	69,204
Recoveries from tenants	—			29,409			2,280			—			31,689
Other revenues	—			409			798			(13		)	1,194
Total revenues	4,226			94,784			7,354			(4,277		)	102,087
Expenses:
Property operating costs	—			31,862			2,472			(4,239		)	30,095
Real estate taxes and insurance	—			3,357			110			—			3,467
Depreciation and amortization	16			22,117			1,136			—			23,269
General and administrative	3,907			16			317			—			4,240
Other expenses	256			11			644			(38		)	873
Total expenses	4,179			57,363			4,679			(4,277		)	61,944
Operating income	47			37,421			2,675			—			40,143
Interest income	67			—			1			—			68
Interest:
Expense incurred	(10,210		)	1,328			1,058			—			(7,824		)
Amortization of deferred financing costs	(822		)	75			4			—			(743		)
Equity in earnings	42,562			—			—			(42,562		)	—
Net income	31,644			38,824			3,738			(42,562		)	31,644
Preferred unit distributions	(6,811		)	—			—			—			(6,811		)
Net income attributable to common units	$	24,833		$	38,824		$	3,738		$	(42,562	)	$	24,833
DUPONT FABROS TECHNOLOGY, L.P.
SUPPLEMENTAL CONSOLIDATING STATEMENTS OF CASH FLOWS
(in thousands)
	Three months ended March 31, 2015
	Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
	Partnership			Guarantors			Non-Guarantors						Total
Cash flow from operating activities
Net cash (used in) provided by operating activities	$	(16,885	)	$	59,837		$	6,140		$	—		$	49,092
Cash flow from investing activities
Investments in real estate – development	(220		)	(4,599		)	(52,765		)	—			(57,584		)
Investments in affiliates	4,831			(53,565		)	48,734			—			—
Interest capitalized for real estate under development	(6		)	(980		)	(1,870		)	—			(2,856		)
Improvements to real estate	—			(522		)	(52		)	—			(574		)
Additions to non-real estate property	(5		)	(171		)	—			—			(176		)
Net cash provided by (used in) investing activities	4,600			(59,837		)	(5,953		)	—			(61,190		)
Cash flow from financing activities
Line of credit:
Proceeds	90,000			—			—			—			90,000
Equity compensation (payments) proceeds	(7,489		)	—			—			—			(7,489		)
OP unit repurchases	(31,912		)	—			—			—			(31,912		)
Distributions	(41,040		)	—			—			—			(41,040		)
Net cash provided by financing activities	9,559			—			—			—			9,559
Net (decrease) increase in cash and cash equivalents	(2,726		)	—			187			—			(2,539		)
Cash and cash equivalents, beginning	21,806			—			3,574			—			25,380
Cash and cash equivalents, ending	$	19,080		$	—		$	3,761		$	—		$	22,841
DUPONT FABROS TECHNOLOGY, L.P.
SUPPLEMENTAL CONSOLIDATING STATEMENTS OF CASH FLOWS
(in thousands)
	Three months ended March 31, 2014
	Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
	Partnership			Guarantors			Non-Guarantors						Total
Cash flow from operating activities
Net cash (used in) provided by operating activities	$	(11,706	)	$	50,066		$	6,132		$	—		$	44,492
Cash flow from investing activities
Investments in real estate – development	(152		)	(44,951		)	(35,056		)	—			(80,159		)
Investments in affiliates	(28,651		)	(3,162		)	31,813			—			—
Interest capitalized for real estate under development	(1		)	(1,328		)	(1,636		)	—			(2,965		)
Improvements to real estate	—			(425		)	—			—			(425		)
Additions to non-real estate property	(5		)	(200		)	(15		)	—			(220		)
Net cash provided by (used in) investing activities	(28,809		)	(50,066		)	(4,894		)	—			(83,769		)
Cash flow from financing activities
Unsecured term loan:
Proceeds	96,000			—			—			—			96,000
Payments of financing costs	(71		)	—			(25		)	—			(96		)
Equity compensation (payments) proceeds	3,457			—			—			—			3,457
Distributions	(27,030		)	—			—			—			(27,030		)
Net cash provided by (used in) financing activities	72,356			—			(25		)	—			72,331
Net increase (decrease) in cash and cash equivalents	31,841			—			1,213			—			33,054
Cash and cash equivalents, beginning	32,903						1,611			—			34,514
Cash and cash equivalents, ending	$	64,744		$	—		$	2,824		$	—		$	67,568

2_Significant_Accounting_Polic1

2. Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation [Text Block]	Basis of Presentation
	This report combines the quarterly reports on Form 10-Q for the quarter ended March 31, 2015 of DuPont Fabros Technology, Inc. and DuPont Fabros Technology, L.P. References to “DFT” mean DuPont Fabros Technology, Inc. and its controlled subsidiaries; and references to the “Operating Partnership” or “OP” mean DuPont Fabros Technology, L.P. and its controlled subsidiaries.
	We believe combining the quarterly reports on Form 10-Q of DFT and the Operating Partnership into this single report provides the following benefits:
	•	enhances investors’ understanding of DFT and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;
	•	eliminates duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the disclosure in this report applies to both DFT and the Operating Partnership; and
	•	creates time and cost efficiencies through the preparation of one combined report instead of two separate reports.
	We operate DFT and the Operating Partnership as one business. The management of DFT consists of the same employees as the management of the Operating Partnership.
	We believe it is important for investors to understand the few differences between DFT and the Operating Partnership in the context of how DFT and the Operating Partnership operate as a consolidated company. DFT is a REIT, whose only material asset is its ownership of OP units of the Operating Partnership. As a result, DFT does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time and guaranteeing unsecured debt of the Operating Partnership. DFT has not issued any indebtedness, but has guaranteed all of the unsecured debt of the Operating Partnership. The Operating Partnership holds all the real estate assets of the Company. Except for net proceeds from public equity issuances by DFT, which are contributed to the Operating Partnership in exchange for OP units or preferred units, the Operating Partnership generates all remaining capital required by our business. These sources include the Operating Partnership’s operations, its direct or indirect incurrence of indebtedness, and the issuance of partnership units.
	As general partner with control of the Operating Partnership, DFT consolidates the Operating Partnership for financial reporting purposes. The presentation of stockholders’ equity and partners’ capital are the main areas of difference between the consolidated financial statements of DFT and those of the Operating Partnership. The Operating Partnership’s capital includes preferred units and general and limited common units that are owned by DFT and the other partners. DFT’s stockholders’ equity includes preferred stock, common stock, additional paid in capital and retained earnings. The common limited partnership interests held by the limited partners (other than DFT) in the Operating Partnership are presented as “redeemable partnership units” in the Operating Partnership’s consolidated financial statements and as “redeemable noncontrolling interests-operating partnership” in DFT’s consolidated financial statements. The only difference between the assets and liabilities of DFT and the Operating Partnership as of March 31, 2015 is a $4.2 million bank account held by DFT that is not part of the Operating Partnership. Net income is the same for DFT and the Operating Partnership.
	The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In our opinion, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. All significant intercompany accounts and transactions have been eliminated in the accompanying consolidated financial statements. The results of operations for the three months ended March 31, 2015 are not necessarily indicative of the results that may be expected for the full year. These consolidated financial statements should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations contained elsewhere in this Form 10-Q and the audited financial statements and accompanying notes for the year ended December 31, 2014 contained in our Annual Report on Form 10-K, which contains a complete listing of our significant accounting policies.
	We have one reportable segment consisting of investments in data centers located in the United States. All of our properties generate similar types of revenues and expenses related to customer rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a range of customers, the types of services provided to them are limited to a few core principles. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio.
Use of Estimates [Policy Text Block]	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
Property [Policy Text Block]	Property
	Depreciation on buildings is generally provided on a straight-line basis over 40 years from the date the buildings were placed in service. Building components are depreciated over the life of the respective improvement ranging from 10 to 40 years from the date the components were placed in service. Personal property is depreciated over three years to seven years. Depreciation expense was $23.9 million and $22.2 million for the three months ended March 31, 2015 and 2014, respectively. Included in these amounts is amortization expense related to tenant origination costs, which was $0.7 million and $0.8 million for the three months ended March 31, 2015 and 2014, respectively. Repairs and maintenance costs are expensed as incurred.
	We record impairment losses on long-lived assets used in operations or in development when events or changes in circumstances indicate that the assets might be impaired, and the estimated undiscounted cash flows to be generated by those assets are less than the carrying amounts. If circumstances indicating impairment of a long-lived asset are present, we would determine the fair value of that asset, and an impairment loss would be recognized in an amount equal to the excess of the carrying amount of the impaired asset over its fair value. We assess the recoverability of the carrying value of our assets on a property-by-property basis. No impairment losses were recorded during the three months ended March 31, 2015 and 2014.
Deferred Costs [Policy Text Block]	Deferred Costs
	Deferred costs, net in our accompanying consolidated balance sheets include both financing and leasing costs.
	Financing costs, which represent fees and other costs incurred in obtaining debt, are amortized using the effective-interest rate method, or a method that approximates the effective-interest method, over the term of the loan and are included in amortization of deferred financing costs. In May 2014, we amended our unsecured revolving credit facility ("Unsecured Credit
	Facility"), which, due to the change in composition of lenders comprising the Unsecured Credit Facility's bank group, resulted
	in the partial write-off of unamortized deferred financing costs totaling $0.3 million. In July 2014, we amended our unsecured
	term loan agreement ("Unsecured Term Loan"), which, due to the change in composition of lenders comprising the Unsecured
	Term Loan's bank group, resulted in a loss on early extinguishment of debt of $1.4 million, which included a partial write-off of
	unamortized deferred financing costs of $0.7 million. Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Financing costs	$	24,110			$	24,110
	Accumulated amortization	(7,693		)		(6,820		)
	Financing costs, net	$	16,417			$	17,290
	Leasing costs, which are either external fees and costs incurred in the successful negotiations of leases, internal costs expended in the successful negotiations of leases or the estimated leasing commissions resulting from the allocation of the purchase price of ACC2, VA3, VA4 and ACC4, are deferred and amortized over the terms of the related leases on a straight-line basis. If an applicable lease terminates prior to the expiration of its initial term, the carrying amount of the costs are written off to amortization expense. Leasing costs incurred for the three months ended March 31, 2015 and 2014 were as follows (in thousands):
		Three months ended March 31,
		2015				2014
	Leasing costs incurred for new leases	$	373			$	52
	Leasing costs incurred for renewals	1,101				—
	Total leasing costs incurred	$	1,474			$	52
	Amortization of deferred leasing costs totaled $1.1 million and $1.0 million for the three months ended March 31, 2015 and 2014, respectively. Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Leasing costs	$	53,832			$	52,358
	Accumulated amortization	(32,220		)		(31,153		)
	Leasing costs, net	$	21,612			$	21,205
Inventory [Policy Text Block]	Inventory
	We maintain fuel inventory for our generators, which is recorded at the lower of cost (on a first-in, first-out basis) or market. As of March 31, 2015 and December 31, 2014, the fuel inventory was $4.4 million and $4.3 million, respectively, and is included in prepaid expenses and other assets in the accompanying consolidated balance sheets.
Rental Income [Policy Text Block]	Rental Income
	We, as a lessor, have retained substantially all the risks and benefits of ownership and account for our leases as operating leases. For lease agreements that provide for scheduled fixed and determinable rent increases, rental income is recognized on a straight-line basis over the non-cancellable term of the leases, which commences when control of the space and critical power have been provided to the customer. If the lease contains an early termination clause with a penalty payment, we determine the lease termination date by evaluating whether the penalty reasonably assures that the lease will not be terminated early. Lease inducements, which include free rent or cash payments to customers, are amortized as a reduction of rental income over the non-cancellable lease term. Straight-line rents receivable are included in deferred rent in the accompanying consolidated balance sheets. Lease intangible assets and liabilities that have resulted from above-market and below-market leases that were acquired are amortized on a straight-line basis as decreases and increases, respectively, to rental revenue over the remaining non-cancellable term of the underlying leases. If a lease terminates prior to the expiration of its initial term, the unamortized portion of lease intangibles associated with that lease will be written off to rental revenue. Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Lease contracts above market value	$	23,100			$	23,100
	Accumulated amortization	(15,321		)		(15,046		)
	Lease contracts above market value, net	$	7,779			$	8,054
	Lease contracts below market value	$	39,375			$	39,375
	Accumulated amortization	(33,206		)		(32,338		)
	Lease contracts below market value, net	$	6,169			$	7,037
	Our policy is to record a reserve for losses on accounts receivable equal to the estimated uncollectible accounts. The estimate is based on our historical experience and a review of the current status of our receivables. As of March 31, 2015 and December 31, 2014, we applied interest received to the note principal balance and had reserves against rents and other receivables of $5.1 million and $4.9 million, respectively. We also establish an appropriate allowance for doubtful accounts for receivables arising from the straight-lining of rents. These receivables arise from revenue recognized in excess of amounts currently due under the lease and are recorded as deferred rent in the accompanying consolidated balance sheets. As of March 31, 2015 and December 31, 2014, we had reserves against deferred rent of $3.7 million.
	The reserves described above were established for one customer that restructured its lease obligations with us during 2013. Under this restructuring, this customer's outstanding accounts receivable and deferred rent receivable related to the space that was returned to us were converted into a note receivable, the terms of which require the payment of principal and interest through December 31, 2016. Principal payments on the note are calculated on a ten-year amortization schedule with a final principal payment of the remaining note balance due on December 31, 2016. Additionally, under this restructuring, this customer deferred two-thirds of its base rent payments due for its lease at our NJ1 facility through July 2014, which were added to the note. In February 2015, this customer filed a voluntary petition for relief under Chapter 11 of the United States Bankruptcy Code. To date, we have applied the interest portion of all note payments received, totaling $1.2 million, to the note principal balance on our consolidated balance sheet. The note balance as of March 31, 2015 and December 31, 2014 was $6.5 million and $6.6 million, respectively, which is recorded within rents and other receivables, net in our accompanying consolidated balance sheets. The note receivable balance, net of reserves and interest applied to the principal, as of March 31, 2015 and December 31, 2014 was $1.4 million and $1.7 million, respectively.
	Due to the uncertainty surrounding this customer's ability to pay its contractual rent obligations, we have also reserved $3.7 million of this customer's deferred rent receivable balance of $8.5 million as of March 31, 2015.
	Customer leases generally contain provisions under which the customers reimburse us for a portion of operating expenses and real estate taxes incurred by the property. Recoveries from tenants are included in revenue in the accompanying consolidated statements of operations in the period the applicable expenditures are incurred. Most of our leases also provide us with a property management fee based on a percentage of base rent collected and property-level operating expenses, other than charges for power used by customers to run their servers and cool their space. Property management fees are included in base rent in the accompanying consolidated statements of operations in the applicable period in which they are earned.
Other Revenue [Policy Text Block]	Other Revenue
	Other revenue primarily consists of services provided to customers on a non-recurring basis. This includes projects such as the purchase and installation of circuits, racks, breakers and other customer requested items. Revenue is recognized on a completed contract basis when the project is finished and ready for the customer's use. This method is consistently applied for all periods presented. Costs of providing these services are included in other expenses in the accompanying consolidated statements of operations.
Redeemable Noncontrolling Interests—Operating Partnership / Redeemable Partnership Units [Policy Text Block]	Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Partnership Units
	Redeemable noncontrolling interests – operating partnership, as presented on DFT’s consolidated balance sheets, represent the limited partnership interests in the Operating Partnership (“OP units”) held by individuals and entities other than DFT. These interests are also presented on the Operating Partnership’s consolidated balance sheets, referred to as “redeemable partnership units.” Accordingly, the following discussion related to redeemable noncontrolling interests – operating partnership of DFT refers equally to redeemable partnership units of the Operating Partnership.
	Redeemable noncontrolling interests – operating partnership, which require cash payment, or allow settlement in shares, but with the ability to deliver the shares outside of the control of DFT, are reported outside of the permanent equity section of the consolidated balance sheets of DFT and the Operating Partnership. Redeemable noncontrolling interests – operating partnership are adjusted for income, losses and distributions allocated to OP units not held by DFT (normal noncontrolling interest accounting amount). Adjustments to redeemable noncontrolling interests – operating partnership are recorded to reflect increases or decreases in the ownership of the Operating Partnership by holders of OP units, including the redemptions of OP units for cash or in exchange for shares of DFT’s common stock. If such adjustments result in redeemable noncontrolling interests – operating partnership being recorded at less than the redemption value of the OP units, redeemable noncontrolling interests – operating partnership are further adjusted to their redemption value (see Note 6). Redeemable noncontrolling interests – operating partnership are recorded at the greater of the normal noncontrolling interest accounting amount or redemption value. The following is a summary of activity for redeemable noncontrolling interests – operating partnership for the three months ended March 31, 2015 (dollars in thousands):
		OP Units
		Number			Amount
	Balance at December 31, 2014	15,437,237			$	513,134
	Net income attributable to redeemable noncontrolling interests – operating partnership	—			3,719
	Distributions declared	—			(6,476		)
	Redemption of operating partnership units	(18,000	)		(598		)
	Adjustments to redeemable noncontrolling interests – operating partnership	—			(5,878		)
	Balance at March 31, 2015	15,419,237			$	503,901
	The following is a summary of activity for redeemable partnership units for the three months ended March 31, 2015 (dollars in thousands):
		OP Units
		Number			Amount
	Balance at December 31, 2014	15,437,237			$	513,134
	Redemption of operating partnership units	(18,000	)		(598		)
	Adjustments to redeemable partnership units	—			(8,635		)
	Balance at March 31, 2015	15,419,237			$	503,901
	Net income is allocated to controlling interests and redeemable noncontrolling interests – operating partnership in accordance with the limited partnership agreement of the Operating Partnership. The following is a summary of net income attributable to controlling interests and transfers to redeemable noncontrolling interests – operating partnership for the three months ended March 31, 2015 and 2014 (dollars in thousands):
		Three months ended March 31,
		2015				2014
	Net income attributable to controlling interests	$	22,614			$	26,856
	Transfers from noncontrolling interests:
	Net change in the Company’s common stock and additional paid in capital due to the redemption of OP units and other adjustments to redeemable noncontrolling interests – operating partnership	6,476				11,434
		$	29,090			$	38,290
Earnings Per Share of the REIT [Policy Text Block]	Earnings Per Share of DFT
	Basic earnings per share is calculated by dividing the net income attributable to common shares for the period by the weighted average number of common shares outstanding during the period using the two class method. Diluted earnings per share is calculated by dividing the net income attributable to common shares for the period by the weighted average number of common and dilutive securities outstanding during the period using the two class method.
Earnings Per Unit of the Operating Partnership [Policy Text Block]	Earnings Per Unit of the Operating Partnership
	Basic earnings per unit is calculated by dividing the net income attributable to common units for the period by the weighted average number of common units outstanding during the period using the two class method. Diluted earnings per unit is calculated by dividing the net income attributable to common units for the period by the weighted average number of common and dilutive securities outstanding during the period
Stock-based Compensation [Policy Text Block]	Stock-based Compensation
	We award stock-based compensation to employees and members of our Board of Directors in the form of common stock. For each stock award granted by DFT, the OP issues an equivalent common unit, which may be referred to herein as a common share, common stock, or a common unit. We estimate the fair value of the awards and recognize this value over the requisite service period. The fair value of restricted stock-based compensation is based on the market value of DFT’s common stock on the date of the grant. The fair value of options to purchase common stock is based on the Black-Scholes model. The fair value of performance units is based on a Monte Carlo simulation.

2_Significant_Accounting_Polic2

2. Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Schedule of Deferred Financing Costs [Table Text Block]	Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Financing costs	$	24,110			$	24,110
	Accumulated amortization	(7,693		)		(6,820		)
	Financing costs, net	$	16,417			$	17,290
Schedule of Leasing Costs Incurred [Table Text Block]
		Three months ended March 31,
		2015				2014
	Leasing costs incurred for new leases	$	373			$	52
	Leasing costs incurred for renewals	1,101				—
	Total leasing costs incurred	$	1,474			$	52
Schedule of Deferred Leasing Costs [Table Text Block]	Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Leasing costs	$	53,832			$	52,358
	Accumulated amortization	(32,220		)		(31,153		)
	Leasing costs, net	$	21,612			$	21,205
Schedule of Lease Intangibles Above and Below Market Value [Table Text Block]	Balances, net of accumulated amortization, at March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,				December 31,
		2015				2014
	Lease contracts above market value	$	23,100			$	23,100
	Accumulated amortization	(15,321		)		(15,046		)
	Lease contracts above market value, net	$	7,779			$	8,054
	Lease contracts below market value	$	39,375			$	39,375
	Accumulated amortization	(33,206		)		(32,338		)
	Lease contracts below market value, net	$	6,169			$	7,037
Redeemable Noncontrolling Interest [Table Text Block]	The following is a summary of activity for redeemable noncontrolling interests – operating partnership for the three months ended March 31, 2015 (dollars in thousands):
		OP Units
		Number			Amount
	Balance at December 31, 2014	15,437,237			$	513,134
	Net income attributable to redeemable noncontrolling interests – operating partnership	—			3,719
	Distributions declared	—			(6,476		)
	Redemption of operating partnership units	(18,000	)		(598		)
	Adjustments to redeemable noncontrolling interests – operating partnership	—			(5,878		)
	Balance at March 31, 2015	15,419,237			$	503,901
Redeemable Partnership Units [Table Text Block]	The following is a summary of activity for redeemable partnership units for the three months ended March 31, 2015 (dollars in thousands):
		OP Units
		Number			Amount
	Balance at December 31, 2014	15,437,237			$	513,134
	Redemption of operating partnership units	(18,000	)		(598		)
	Adjustments to redeemable partnership units	—			(8,635		)
	Balance at March 31, 2015	15,419,237			$	503,901
Schedule of Net Income Attributable to Controlling Interests and Transfers From Redeemable Noncontrolling Interests Operating Partnership [Table Text Block]	The following is a summary of net income attributable to controlling interests and transfers to redeemable noncontrolling interests – operating partnership for the three months ended March 31, 2015 and 2014 (dollars in thousands):
		Three months ended March 31,
		2015				2014
	Net income attributable to controlling interests	$	22,614			$	26,856
	Transfers from noncontrolling interests:
	Net change in the Company’s common stock and additional paid in capital due to the redemption of OP units and other adjustments to redeemable noncontrolling interests – operating partnership	6,476				11,434
		$	29,090			$	38,290

3_Real_Estate_Assets_Tables

3. Real Estate Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Real Estate [Abstract]
Schedule of Real Estate Properties [Table Text Block]	March 31, 2015 (dollars in thousands):
	Property	Location		Land		Buildings and		Construction		Total Cost
						Improvements		in Progress
								and Land Held
								for
								Development
	ACC2	Ashburn, VA		$	2,500	$	159,199			$	161,699
	ACC3	Ashburn, VA		1,071		95,978				97,049
	ACC4	Ashburn, VA		6,600		538,557				545,157
	ACC5	Ashburn, VA		6,443		298,708				305,151
	ACC6	Ashburn, VA		5,518		216,697				222,215
	ACC7 Phase I	Ashburn, VA		2,787		94,077				96,864
	VA3	Reston, VA		9,000		178,362				187,362
	VA4	Bristow, VA		6,800		149,250				156,050
	CH1	Elk Grove Village, IL		23,611		358,412				382,023
	NJ1 Phase I	Piscataway, NJ		4,311		210,136				214,447
	SC1 Phase I and IIA	Santa Clara, CA		15,152		325,587				340,739
				83,793		2,624,963		—		2,708,756
	Construction in progress and land held for development	(1	)					410,870		410,870
				$	83,793	$	2,624,963	$	410,870	$	3,119,626
	-1	Properties located in Ashburn, VA (ACC7 Phases II-IV and ACC8); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2) and Santa Clara, CA (SC1 Phase

4_Debt_Tables

4. Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Instrument [Line Items]
Schedule of Debt [Table Text Block]	Debt Summary as of March 31, 2015 and December 31, 2014
	($ in thousands)
		March 31, 2015													December 31, 2014
		Amounts				% of Total			Rates			Maturities			Amounts
												(years)
	Secured	$	115,000			10	%		1.7	%		3			$	115,000
	Unsecured	1,000,000				90	%		4.2	%		5.4			910,000
	Total	$	1,115,000			100	%		3.9	%		5.2			$	1,025,000
	Fixed Rate Debt:
	Unsecured Notes due 2021	$	600,000			54	%		5.9	%		6.5			$	600,000
	Fixed Rate Debt	600,000				54	%		5.9	%		6.5			600,000
	Floating Rate Debt:
	Unsecured Credit Facility	150,000				14	%		1.7	%		3.1			60,000
	Unsecured Term Loan	250,000				22	%		1.7	%		4.3			250,000
	ACC3 Term Loan	115,000				10	%		1.7	%		3			115,000
	Floating Rate Debt	515,000				46	%		1.7	%		3.7			425,000
	Total	$	1,115,000			100	%		3.9	%		5.2			$	1,025,000
Schedule of Maturities of Long-term Debt [Table Text Block]	A summary of our debt maturity schedule as of March 31, 2015 is as follows:
	Debt Maturity as of March 31, 2015
	($ in thousands)
	Year		Fixed Rate					Floating Rate					Total				% of Total		Rates
	2015		$	—				$	—				$	—			—		—
	2016		—					3,750			-2		3,750				0.3	%	1.7	%
	2017		—					8,750			-2		8,750				0.8	%	1.7	%
	2018		—					252,500			(2)(3)		252,500				22.7	%	1.7	%
	2019		—					250,000			-4		250,000				22.4	%	1.7	%
	2020		—					—					—				—		—
	2021		600,000			-1		—					600,000				53.8	%	5.9	%
	Total		$	600,000				$	515,000				$	1,115,000			100	%	3.9	%
	-1	The 5.875% Unsecured Notes due 2021 mature on September 15, 2021.
	-2	The ACC3 Term Loan matures on March 27, 2018 with no extension option. Quarterly principal payments of $1.25 million begin on April 1, 2016, increase to $2.5 million on April 1, 2017 and continue through maturity.
	-3	The Unsecured Credit Facility matures on May 13, 2018 with a one-year extension option.
	-4	The Unsecured Term Loan matures on July 21, 2019 with no extension option.
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Schedule Of Term Loan Interest Rate Margin Applicable By Indebtedness Level [Table Text Block] [Table Text Block]
					Applicable Margin
	Pricing Level		Ratio of Total Indebtedness to Gross Asset Value		LIBOR Rate Loans			Base Rate Loans
	Level 1		Less than or equal to 35%		1.5	%		0.5	%
	Level 2		Greater than 35% but less than or equal to 40%		1.6	%		0.6	%
	Level 3		Greater than 40% but less than or equal to 45%		1.75	%		0.75	%
	Level 4		Greater than 45% but less than or equal to 52.5%		1.9	%		0.9	%
	Level 5		Greater than 52.5%		2.1	%		1.1	%
Schedule Of Credit Rating For Unsecured Term Loan [Table Text Block] [Table Text Block]
					Applicable Margin
	Credit Rating Level		Credit Rating		LIBOR Rate Loans			Base Rate Loans
	Level 1		Greater than or equal to A- by S&P or A3 by Moody’s		0.825	%		0	%
	Level 2		Greater than or equal to BBB+ by S&P or Baa1 by Moody’s		0.875	%		0	%
	Level 3		Greater than or equal to BBB by S&P or Baa2 by Moody’s		1	%		0	%
	Level 4		Greater than or equal to BBB- by S&P or Baa3 by Moody’s		1.25	%		0.25	%
	Level 5		Less than BBB- by S&P or Baa3 by Moody’s		1.65	%		0.65	%
Unsecured Notes due 2021 [Member]
Debt Instrument [Line Items]
Summary Of Maturities And Percentage Of Redemption Price Of Unsecures Notes [Table Text Block]
	Year	Redemption Price
	2016	104.406	%
	2017	102.938	%
	2018	101.469	%
	2019 and thereafter	100	%
Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Schedule Of Line of Credit Interest Rate Margin Applicable By Indebtedness Level [Table Text Block]
					Applicable Margin
	Pricing Level		Ratio of Total Indebtedness to Gross Asset Value		LIBOR Rate Loans			Base Rate Loans
	Level 1		Less than or equal to 35%		1.55	%		0.55	%
	Level 2		Greater than 35% but less than or equal to 40%		1.65	%		0.65	%
	Level 3		Greater than 40% but less than or equal to 45%		1.8	%		0.8	%
	Level 4		Greater than 45% but less than or equal to 52.5%		1.95	%		0.95	%
	Level 5		Greater than 52.5%		2.15	%		1.15	%
Schedule Of Credit Rating Of Unsecured Notes for Line of Credit [Table Text Block]
					Applicable Margin
	Credit Rating Level		Credit Rating		LIBOR Rate Loans			Base Rate Loans
	Level 1		Greater than or equal to A- by S&P or A3 by Moody’s		0.875	%		0	%
	Level 2		Greater than or equal to BBB+ by S&P or Baa1 by Moody’s		0.925	%		0	%
	Level 3		Greater than or equal to BBB by S&P or Baa2 by Moody’s		1.05	%		0.05	%
	Level 4		Greater than or equal to BBB- by S&P or Baa3 by Moody’s		1.3	%		0.3	%
	Level 5		Less than BBB- by S&P or Baa3 by Moody’s		1.7	%		0.7	%

9_Equity_Compensation_Plan_Tab

9. Equity Compensation Plan (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]
		Shares of			Weighted Average
		Restricted Stock			Fair Value at
					Date of Grant
	Unvested balance at December 31, 2014	323,989			$	24.1
	Granted	153,655			$	32.26
	Vested	(124,197	)		$	23.78
	Forfeited	(888	)		$	24.61
	Unvested balance at March 31, 2015	352,559			$	27.76
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	A summary of our stock option activity under the applicable equity incentive plan for the three months ended March 31, 2015 is presented in the tables below.
		Number of			Weighted Average
		Options			Exercise Price
	Under option, December 31, 2014	1,592,854			$	19.09
	Granted	—			$	—
	Exercised	—			$	—
	Forfeited	—			$	—
	Under option, March 31, 2015	1,592,854			$	19.09
		Shares Subject			Total Unearned			Weighted Average		Weighted Average
		to Option			Compensation			Vesting Period		Remaining
										Contractual Term
	As of March 31, 2015	1,592,854			$	0.2	million	0.9 years		5.9 years
Schedule of Stock Options Roll Forward [Table Text Block]	The following table sets forth the number of unvested options as of March 31, 2015 and the weighted average fair value of these options at the grant date.
		Number of			Weighted Average
		Options			Fair Value
					at Date of Grant
	Unvested balance at December 31, 2014	302,324			$	5.05
	Granted	—			$	—
	Vested	(256,536	)		$	5.11
	Forfeited	—			$	—
	Unvested balance at March 31, 2015	45,788			$	4.75
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]	The following tables sets forth the number of exercisable options as of March 31, 2015 and the weighted average fair value and exercise price of these options at the grant date.
		Number of			Weighted Average
		Options			Fair Value
					at Date of Grant
	Options Exercisable at December 31, 2014	1,290,530			$	5.74
	Vested	256,536			$	5.11
	Exercised	—			$	—
	Options Exercisable at March 31, 2015	1,547,066			$	5.63
		Exercisable			Intrinsic Value			Weighted Average			Weighted Average
		Options						Exercise Price			Remaining
											Contractual Term
	As of March 31, 2015	1,547,066			$	21.2	million	$	18.99		5.9 years
Schedule of Share-based Payment Award, Performance Units, Valuation Assumptions [Table Text Block]	three months ended March 31, 2015.
		Assumption
	Number of performance units granted	48,674
	Expected volatility	24		%
	Expected annual dividend	5.18		%
	Risk-free rate	1.06		%
	Performance unit fair value at date of grant	$	38.34
	Total grant fair value at date of grant	$1.9 million
	Maximum value of grant on vesting date based on closing price of DFT's stock at the date of grant	$4.7 million

10_Earnings_Per_Share_of_the_R1

10. Earnings Per Share of the REIT (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the reconciliation of basic and diluted average shares outstanding used in the computation of earnings per share of common stock (in thousands except for share and per share amounts):
		Three months ended March 31,
		2015				2014
	Basic and Diluted Shares Outstanding
	Weighted average common shares – basic	65,506,028				65,348,269
	Effect of dilutive securities	950,243				475,652
	Weighted average common shares – diluted	66,456,271				65,823,921
	Calculation of Earnings per Share – Basic
	Net income attributable to common shares	$	15,803			$	20,045
	Net income allocated to unvested restricted shares	(147		)		(116		)
	Net income attributable to common shares, adjusted	15,656				19,929
	Weighted average common shares – basic	65,506,028				65,348,269
	Earnings per common share – basic	$	0.24			$	0.3
	Calculation of Earnings per Share – Diluted
	Net income attributable to common shares	$	15,656			$	20,045
	Adjustments to redeemable noncontrolling interests	—				27
	Adjusted net income available to common shares	15,656				20,072
	Weighted average common shares – diluted	66,456,271				65,823,921
	Earnings per common share – diluted	$	0.24			$	0.3
Schedule of exclusions from diluted earnings per share/unit [Table Text Block]	The following table sets forth the number of stock options and performance units that have been excluded from the calculation of diluted earnings per share as their effect would have been antidilutive (in millions):
		Three months ended March 31,
		2015			2014
	Stock Options	—			0.3
	Performance Units	—			0.2

11_Earnings_Per_Unit_of_the_Op1

11. Earnings Per Unit of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings per unit of the Operating Partnership [Line Items]
Schedule of basic and diluted units outstanding [Table Text Block]	The following table sets forth the reconciliation of basic and diluted average shares outstanding used in the computation of earnings per share of common stock (in thousands except for share and per share amounts):
		Three months ended March 31,
		2015				2014
	Basic and Diluted Shares Outstanding
	Weighted average common shares – basic	65,506,028				65,348,269
	Effect of dilutive securities	950,243				475,652
	Weighted average common shares – diluted	66,456,271				65,823,921
	Calculation of Earnings per Share – Basic
	Net income attributable to common shares	$	15,803			$	20,045
	Net income allocated to unvested restricted shares	(147		)		(116		)
	Net income attributable to common shares, adjusted	15,656				19,929
	Weighted average common shares – basic	65,506,028				65,348,269
	Earnings per common share – basic	$	0.24			$	0.3
	Calculation of Earnings per Share – Diluted
	Net income attributable to common shares	$	15,656			$	20,045
	Adjustments to redeemable noncontrolling interests	—				27
	Adjusted net income available to common shares	15,656				20,072
	Weighted average common shares – diluted	66,456,271				65,823,921
	Earnings per common share – diluted	$	0.24			$	0.3
Schedule of exclusions from diluted earnings per share/unit [Table Text Block]	The following table sets forth the number of stock options and performance units that have been excluded from the calculation of diluted earnings per share as their effect would have been antidilutive (in millions):
		Three months ended March 31,
		2015			2014
	Stock Options	—			0.3
	Performance Units	—			0.2
DuPont Fabros Technology, L.P. [Member]
Earnings per unit of the Operating Partnership [Line Items]
Schedule of basic and diluted units outstanding [Table Text Block]	The following table sets forth the reconciliation of basic and diluted average units outstanding used in the computation of earnings per unit:
		Three months ended March 31,
		2015			2014
	Basic and Diluted Units Outstanding
	Weighted average common units – basic (includes redeemable partnership units and units of general and limited partners)	80,926,265			80,956,206
	Effect of dilutive securities	950,243			475,652
	Weighted average common units – diluted	81,876,508			81,431,858
Schedule of exclusions from diluted earnings per share/unit [Table Text Block]	The following table sets forth the number of stock options and performance units that have been excluded from the calculation of diluted earnings per unit as their effect would have been antidilutive (in millions):
		Three months ended March 31,
		2015			2014
	Stock Options	—			0.3
	Performance Units	—			0.2

13_Supplemental_Consolidating_1

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes (Tables)	3 Months Ended
	Mar. 31, 2015
Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes [Abstract]
Schedule of Supplemental Consolidating Balance Sheets [Table Text Block]	DUPONT FABROS TECHNOLOGY, L.P.
	SUPPLEMENTAL CONSOLIDATING BALANCE SHEETS
	(in thousands except share data)
		March 31, 2015
		Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
		Partnership			Guarantors			Non-Guarantors						Total
	ASSETS
	Income producing property:
	Land	$	—		$	79,935		$	3,858		$	—		$	83,793
	Buildings and improvements	—			2,427,990			196,973			—			2,624,963
		—			2,507,925			200,831			—			2,708,756
	Less: accumulated depreciation	—			(495,120		)	(33,419		)	—			(528,539		)
	Net income producing property	—			2,012,805			167,412			—			2,180,217
	Construction in progress and land held for development	—			152,820			258,050			—			410,870
	Net real estate	—			2,165,625			425,462			—			2,591,087
	Cash and cash equivalents	19,080			—			3,761			—			22,841
	Rents and other receivables	1,391			6,461			3,860			—			11,712
	Deferred rent	—			136,214			2,368			—			138,582
	Lease contracts above market value, net	—			7,779			—			—			7,779
	Deferred costs, net	15,192			16,366			6,471			—			38,029
	Investment in affiliates	2,582,191			—			—			(2,582,191		)	—
	Prepaid expenses and other assets	2,746			43,518			4,167			—			50,431
	Total assets	$	2,620,600		$	2,375,963		$	446,089		$	(2,582,191	)	$	2,860,461
	LIABILITIES AND PARTNERS’ CAPITAL
	Liabilities:
	Line of credit	$	150,000		$	—		$	—		$	—		$	150,000
	Mortgage notes payable	—			—			115,000			—			115,000
	Unsecured term loan	250,000			—			—			—			250,000
	Unsecured notes payable	600,000			—			—			—			600,000
	Accounts payable and accrued liabilities	3,113			19,374			6,042			—			28,529
	Construction costs payable	12			4,195			21,275			—			25,482
	Accrued interest payable	1,937			—			6			—			1,943
	Distribution payable	39,685			—			—			—			39,685
	Lease contracts below market value, net	—			6,169			—			—			6,169
	Prepaid rents and other liabilities	24			61,532			6,268			—			67,824
	Total liabilities	1,044,771			91,270			148,591			—			1,284,632
	Redeemable partnership units	503,901			—									503,901
	Commitments and contingencies	—			—			—			—			—
	Limited Partners’ Capital:
	Series A cumulative redeemable perpetual preferred units, 7,400,000 issued and outstanding at March 31, 2015	185,000			—			—			—			185,000
	Series B cumulative redeemable perpetual preferred units, 6,650,000 issued and outstanding at March 31, 2015	166,250			—			—			—			166,250
	Common units, 64,712,852 issued and outstanding at March 31, 2015	713,376			2,284,693			297,498			(2,582,191		)	713,376
	General partner’s capital, 662,373 common units issued and outstanding at March 31, 2015	7,302			—			—			—			7,302
	Total partners’ capital	1,071,928			2,284,693			297,498			(2,582,191		)	1,071,928
	Total liabilities & partners’ capital	$	2,620,600		$	2,375,963		$	446,089		$	(2,582,191	)	$	2,860,461
	DUPONT FABROS TECHNOLOGY, L.P.
	SUPPLEMENTAL CONSOLIDATING BALANCE SHEETS
	(in thousands except share data)
		December 31, 2014
		Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
		Partnership			Guarantors			Non-Guarantors						Total
	ASSETS
	Income producing property:
	Land	$	—		$	79,935		$	3,858		$	—		$	83,793
	Buildings and improvements	—			2,427,706			195,833			—			2,623,539
		—			2,507,641			199,691			—			2,707,332
	Less: accumulated depreciation	—			(473,203		)	(31,666		)	—			(504,869		)
	Net income producing property	—			2,034,438			168,025			—			2,202,463
	Construction in progress and land held for development	—			145,229			213,736			—			358,965
	Net real estate	—			2,179,667			381,761			—			2,561,428
	Cash and cash equivalents	21,806			—			3,574			—			25,380
	Rents and other receivables	1,775			5,513			825			—			8,113
	Deferred rent	—			139,542			2,823			—			142,365
	Lease contracts above market value, net	—			8,054			—			—			8,054
Deferred costs, net	15,957			16,098			6,440			—			38,495
Investment in affiliates	2,547,049			—			—			(2,547,049		)	—
Prepaid expenses and other assets	2,865			43,866			1,564			—			48,295
Total assets	$	2,589,452		$	2,392,740		$	396,987		$	(2,547,049	)	$	2,832,130
LIABILITIES AND PARTNERS’ CAPITAL
Liabilities:
Line of credit	$	60,000		$	—		$	—		$	—		$	60,000
Mortgage notes payable	—			—			115,000			—			115,000
Unsecured term loan	250,000			—			—			—			250,000
Unsecured notes payable	600,000			—			—			—			600,000
Accounts payable and accrued liabilities	4,432			19,580			2,961			—			26,973
Construction costs payable	—			4,312			28,637			—			32,949
Accrued interest payable	10,754			—			5			—			10,759
Distribution payable	39,981			—			—			—			39,981
Lease contracts below market value, net	—			7,037			—			—			7,037
Prepaid rents and other liabilities	28			61,728			3,418			—			65,174
Total liabilities	965,195			92,657			150,021			—			1,207,873
Redeemable partnership units	513,134			—			—			—			513,134
Commitments and contingencies	—			—			—			—			—
Limited Partners’ Capital:
Series A cumulative redeemable perpetual preferred units, 7,400,000 issued and outstanding at December 31, 2014	185,000			—			—			—			185,000
Series B cumulative redeemable perpetual preferred units, 6,650,000 issued and outstanding at December 31, 2014	166,250			—			—			—			166,250
Common units, 65,399,431 issued and outstanding at December 31, 2014	752,254			2,300,083			246,966			(2,547,049		)	752,254
General partner’s capital, 662,373 common units issued and outstanding at December 31, 2014	7,619			—			—			—			7,619
Total partners’ capital	1,111,123			2,300,083			246,966			(2,547,049		)	1,111,123
Total liabilities & partners’ capital	$	2,589,452		$	2,392,740		$	396,987		$	(2,547,049	)	$	2,832,130
Schedule of Supplemental Consolidating Statements of Operations [Table Text Block]
		Three months ended March 31, 2015
		Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
		Partnership			Guarantors			Non-Guarantors						Total
	Revenues:
	Base rent	$	4,506		$	66,284		$	5,327		$	(4,544	)	$	71,573
	Recoveries from tenants	—			30,824			2,481			—			33,305
	Other revenues	—			426			2,027			(17		)	2,436
	Total revenues	4,506			97,534			9,835			(4,561		)	107,314
	Expenses:
	Property operating costs	—			32,407			3,610			(4,524		)	31,493
	Real estate taxes and insurance	—			3,667			309			—			3,976
	Depreciation and amortization	11			23,006			2,010			—			25,027
	General and administrative	4,213			15			115			—			4,343
	Other expenses	5,591			—			1,699			(37		)	7,253
	Total expenses	9,815			59,095			7,743			(4,561		)	72,092
	Operating (loss) income	(5,309		)	38,439			2,092			—			35,222
	Interest income	11			—			—			—			11
	Interest:
	Expense incurred	(10,614		)	981			1,375			—			(8,258		)
	Amortization of deferred financing costs	(765		)	81			42			—			(642		)
	Equity in earnings	43,010			—			—			(43,010		)	—
	Net income	26,333			39,501			3,509			(43,010		)	26,333
	Preferred unit distributions	(6,811		)	—			—			—			(6,811		)
	Net income attributable to common units	$	19,522		$	39,501		$	3,509		$	(43,010	)	$	19,522
		Three months ended March 31, 2014
		Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
		Partnership			Guarantors			Non-Guarantors						Total
	Revenues:
	Base rent	$	4,226		$	64,966		$	4,276		$	(4,264	)	$	69,204
	Recoveries from tenants	—			29,409			2,280			—			31,689
	Other revenues	—			409			798			(13		)	1,194
	Total revenues	4,226			94,784			7,354			(4,277		)	102,087
	Expenses:
	Property operating costs	—			31,862			2,472			(4,239		)	30,095
	Real estate taxes and insurance	—			3,357			110			—			3,467
	Depreciation and amortization	16			22,117			1,136			—			23,269
	General and administrative	3,907			16			317			—			4,240
	Other expenses	256			11			644			(38		)	873
	Total expenses	4,179			57,363			4,679			(4,277		)	61,944
	Operating income	47			37,421			2,675			—			40,143
	Interest income	67			—			1			—			68
	Interest:
	Expense incurred	(10,210		)	1,328			1,058			—			(7,824		)
	Amortization of deferred financing costs	(822		)	75			4			—			(743		)
	Equity in earnings	42,562			—			—			(42,562		)	—
	Net income	31,644			38,824			3,738			(42,562		)	31,644
	Preferred unit distributions	(6,811		)	—			—			—			(6,811		)
	Net income attributable to common units	$	24,833		$	38,824		$	3,738		$	(42,562	)	$	24,833
Schedule of Supplemental Consolidating Statements Of Cash Flows [Table Text Block]	DUPONT FABROS TECHNOLOGY, L.P.
	SUPPLEMENTAL CONSOLIDATING STATEMENTS OF CASH FLOWS
	(in thousands)
		Three months ended March 31, 2015
		Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
		Partnership			Guarantors			Non-Guarantors						Total
	Cash flow from operating activities
	Net cash (used in) provided by operating activities	$	(16,885	)	$	59,837		$	6,140		$	—		$	49,092
	Cash flow from investing activities
	Investments in real estate – development	(220		)	(4,599		)	(52,765		)	—			(57,584		)
	Investments in affiliates	4,831			(53,565		)	48,734			—			—
	Interest capitalized for real estate under development	(6		)	(980		)	(1,870		)	—			(2,856		)
	Improvements to real estate	—			(522		)	(52		)	—			(574		)
	Additions to non-real estate property	(5		)	(171		)	—			—			(176		)
	Net cash provided by (used in) investing activities	4,600			(59,837		)	(5,953		)	—			(61,190		)
	Cash flow from financing activities
	Line of credit:
	Proceeds	90,000			—			—			—			90,000
	Equity compensation (payments) proceeds	(7,489		)	—			—			—			(7,489		)
	OP unit repurchases	(31,912		)	—			—			—			(31,912		)
	Distributions	(41,040		)	—			—			—			(41,040		)
	Net cash provided by financing activities	9,559			—			—			—			9,559
	Net (decrease) increase in cash and cash equivalents	(2,726		)	—			187			—			(2,539		)
	Cash and cash equivalents, beginning	21,806			—			3,574			—			25,380
	Cash and cash equivalents, ending	$	19,080		$	—		$	3,761		$	—		$	22,841
	DUPONT FABROS TECHNOLOGY, L.P.
	SUPPLEMENTAL CONSOLIDATING STATEMENTS OF CASH FLOWS
	(in thousands)
		Three months ended March 31, 2014
		Operating			Subsidiary			Subsidiary			Eliminations			Consolidated
		Partnership			Guarantors			Non-Guarantors						Total
	Cash flow from operating activities
	Net cash (used in) provided by operating activities	$	(11,706	)	$	50,066		$	6,132		$	—		$	44,492
	Cash flow from investing activities
	Investments in real estate – development	(152		)	(44,951		)	(35,056		)	—			(80,159		)
	Investments in affiliates	(28,651		)	(3,162		)	31,813			—			—
	Interest capitalized for real estate under development	(1		)	(1,328		)	(1,636		)	—			(2,965		)
	Improvements to real estate	—			(425		)	—			—			(425		)
	Additions to non-real estate property	(5		)	(200		)	(15		)	—			(220		)
	Net cash provided by (used in) investing activities	(28,809		)	(50,066		)	(4,894		)	—			(83,769		)
	Cash flow from financing activities
	Unsecured term loan:
	Proceeds	96,000			—			—			—			96,000
	Payments of financing costs	(71		)	—			(25		)	—			(96		)
	Equity compensation (payments) proceeds	3,457			—			—			—			3,457
	Distributions	(27,030		)	—			—			—			(27,030		)
	Net cash provided by (used in) financing activities	72,356			—			(25		)	—			72,331
	Net increase (decrease) in cash and cash equivalents	31,841			—			1,213			—			33,054
	Cash and cash equivalents, beginning	32,903						1,611			—			34,514
	Cash and cash equivalents, ending	$	64,744		$	—		$	2,824		$	—		$	67,568

1_Description_of_Business_Deta

1. Description of Business (Details)	3 Months Ended
	Mar. 31, 2015
Subsidiary or Equity Method Investee [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	80.90%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	1.00%

2_Significant_Accounting_Polic3

2. Significant Accounting Policies Narrative (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Cash at Bank Held by Parent Company not Part of Operating Partnership	$4.20
Depreciation	23.9	22.2
Tenant Origination Cost Amortization	0.7	0.8
Asset impairment charges	0	0
Amortization of Deferred Leasing Fees	1.1	1
Fuel Inventory	4.4		4.3
Account receivable reserve	5.1		4.9
Deferred Rent Reserve	3.7		3.7
Increase (Decrease) in Notes Receivables	1.2
Notes, Loans and Financing Receivable, Gross, Noncurrent	6.5		6.6
Notes, Loans and Financing Receivable, Net, Noncurrent	1.4		1.7
Building and Building Improvements [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Minimum [Member] | Building and Building Improvements [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Minimum [Member] | Personal Property [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member] | Building and Building Improvements [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Maximum [Member] | Personal Property [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Revolving Credit Facility [Member]
Significant Accounting Policies [Line Items]
Write off of Deferred Debt Issuance Cost			0.3
Unsecured Term Loan [Member]
Significant Accounting Policies [Line Items]
Write off of Deferred Debt Issuance Cost			1.4
Write Off Of Unamortized Debt Issuance Cost			0.7
Deferred Rent Receivable [Member]
Significant Accounting Policies [Line Items]
Deferred Rent Receivable, Gross	$8.50

2_Significant_Accounting_Polic4

2. Significant Accounting Policies Schedule of Deferred Financing Costs (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Significant Accounting Policies [Line Items]
Financing costs	$24,110	$24,110
Accumulated amortization	-7,693	-6,820
Financing costs, net	$16,417	$17,290

2_Significant_Accounting_Polic5

2. Significant Accounting Policies Schedule of Leasing Costs Incurred (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Schedule of Leasing Costs Incurred [Line Items]
Payments for Leasing Costs	$1,474	$52
New Lease [Member]
Schedule of Leasing Costs Incurred [Line Items]
Payments for Leasing Costs	373	52
Lease Renewal [Member]
Schedule of Leasing Costs Incurred [Line Items]
Payments for Leasing Costs	$1,101	$0

2_Significant_Accounting_Polic6

2. Significant Accounting Policies Schedule of Deferred Leasing Costs (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounting Policies [Abstract]
Leasing costs	$53,832	$52,358
Accumulated amortization	-32,220	-31,153
Leasing costs, net	$21,612	$21,205

2_Significant_Accounting_Polic7

2. Significant Accounting Policies Schedule of Above and Below Market Lease Intangibles (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounting Policies [Abstract]
Lease contracts above market value	$23,100	$23,100
Accumulated amortization	-15,321	-15,046
Lease contracts above market value, net	7,779	8,054
Lease contracts below market value	39,375	39,375
Accumulated amortization	-33,206	-32,338
Lease contracts below market value, net	$6,169	$7,037

2_Significant_Accounting_Polic8

2. Significant Accounting Policies Schedule of Redeemable Noncontrolling Interests - Operating Partnership (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accounting Policies [Abstract]
Balance at December 31, 2014, units	15,437,237
Balance at December 31, 2014	$513,134
Net income attributable to redeemable noncontrolling interests – operating partnership	3,719	4,788
Distributions declared	-6,476
Redemption of operating partnership units, shares	-18,000
Redemption of operating partnership units	-598	-2,100
Adjustments to redeemable noncontrolling interests – operating partnership	-5,878	-9,334
Balance at March 31, 2015, units	15,419,237
Balance at March 31, 2015	$503,901

2_Significant_Accounting_Polic9

2. Significant Accounting Policies Schedule of Redeemable Partnership Units (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Significant Accounting Policies [Line Items]
Balance at December 31, 2014, units	15,437,237
Balance at December 31, 2014	$513,134
Redemption of operating partnership units, shares	-18,000
Redemption of operating partnership units	-598	-2,100
Balance at March 31, 2015, units	15,419,237
Balance at March 31, 2015	503,901
DuPont Fabros Technology, L.P. [Member]
Significant Accounting Policies [Line Items]
Balance at December 31, 2014, units	15,437,237
Balance at December 31, 2014	513,134
Redemption of operating partnership units, shares	-18,000
Redemption of operating partnership units	-598	-2,100
Adjustments to redeemable partnership units	-8,635
Balance at March 31, 2015, units	15,419,237
Balance at March 31, 2015	$503,901

Recovered_Sheet1

2. Significant Accounting Policies Schedule of Net Income Attributable to Controlling Interests and Transfers to Redeemable Noncontrolling Interests – Operating Partnership (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accounting Policies [Abstract]
Net income attributable to controlling interests	$22,614	$26,856
Net change in the Company’s common stock and additional paid in capital due to the redemption of OP units and other adjustments to redeemable noncontrolling interests – operating partnership	6,476	11,434
Net Income Attributable to Controlling Interests and Transfers from Redeemable Noncontrolling Interests Operating Partnership	$29,090	$38,290

3_Real_Estate_Assets_Details

3. Real Estate Assets (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Thousands, unless otherwise specified
Real Estate Assets [Line Items]
Land	$83,793		$83,793
Buildings and improvements	2,624,963		2,623,539
Construction in progress and land held for development	410,870	[1]	358,965
Income producing property	2,708,756		2,707,332
Real Estate, Gross	3,119,626
ACC2 [Member]
Real Estate Assets [Line Items]
Land	2,500
Buildings and improvements	159,199
Construction in progress and land held for development
Income producing property	161,699
ACC3 [Member]
Real Estate Assets [Line Items]
Land	1,071
Buildings and improvements	95,978
Construction in progress and land held for development
Income producing property	97,049
ACC4 [Member]
Real Estate Assets [Line Items]
Land	6,600
Buildings and improvements	538,557
Construction in progress and land held for development
Income producing property	545,157
ACC5 [Member]
Real Estate Assets [Line Items]
Land	6,443
Buildings and improvements	298,708
Construction in progress and land held for development
Income producing property	305,151
ACC6 [Member]
Real Estate Assets [Line Items]
Land	5,518
Buildings and improvements	216,697
Construction in progress and land held for development
Income producing property	222,215
ACC7 Phase I [Member]
Real Estate Assets [Line Items]
Land	2,787
Buildings and improvements	94,077
Construction in progress and land held for development
Income producing property	96,864
VA3 [Member]
Real Estate Assets [Line Items]
Land	9,000
Buildings and improvements	178,362
Construction in progress and land held for development
Income producing property	187,362
VA4 [Member]
Real Estate Assets [Line Items]
Land	6,800
Buildings and improvements	149,250
Construction in progress and land held for development
Income producing property	156,050
CH1 [Member]
Real Estate Assets [Line Items]
Land	23,611
Buildings and improvements	358,412
Construction in progress and land held for development
Income producing property	382,023
NJ1 Phase I [Member]
Real Estate Assets [Line Items]
Land	4,311
Buildings and improvements	210,136
Construction in progress and land held for development
Income producing property	214,447
SC1 Phase I and IIA [Member]
Real Estate Assets [Line Items]
Land	15,152
Buildings and improvements	325,587
Construction in progress and land held for development
Income producing property	$340,739
[1]	(1)Properties located in Ashburn, VA (ACC7 Phases II-IV and ACC8); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2) and Santa Clara, CA (SC1 Phase IIB and SC2).

4_Debt_Summary_Details

4. Debt Summary (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Mortgage notes payable	$115,000	$115,000
Unsecured Term Loan	250,000	250,000
Long-term Debt	1,115,000	1,025,000
Unsecured notes payable	600,000	600,000
Line of credit	150,000	60,000
Total Debt in Percentage	100.00%
Debt, Weighted Average Interest Rate	3.90%
Long Term Debt, Weighted Average Maturity in Years	5.2
Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	600,000	600,000
Percentage of Total Debt	54.00%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.90%
FixedInterestDebtMaturityInYears	6.5
Unsecured Notes due 2021 [Member]
Debt Instrument [Line Items]
Unsecured notes payable	600,000	600,000
Percentage of Total Debt	54.00%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.88%
Unsecured Debt Maturity, in Years	6.5
Floating Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Amount	515,000	425,000
Percentage of Total Debt	46.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.70%
VariableInterestDebtMaturityInYears	3.7
Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit	150,000	60,000
Percentage of Total Debt	14.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.70%
Unsecured Debt Maturity, in Years	3.1
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Unsecured Term Loan	250,000	250,000
Percentage of Total Debt	22.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.70%
Unsecured Debt Maturity, in Years	4.3
AccThreeTermLoan [Member]
Debt Instrument [Line Items]
Term Loan	115,000	115,000
Percentage of Total Debt	10.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.70%
Secured Debt Maturity, in Years	3
Secured Debt [Member]
Debt Instrument [Line Items]
Mortgage notes payable	115,000	115,000
Percentage of Total Debt	10.00%
Long-Term Debt, Secured Interest Rate	1.70%
Secured Debt Maturity, in Years	3
Unsecured Debt [Member]
Debt Instrument [Line Items]
Unsecured Term Loan	$1,000,000	$910,000
Percentage of Total Debt	90.00%
Long-Term Debt, Unsecured Interest Rate	4.20%
Unsecured Debt Maturity, in Years	5.4

4_Debt_ACC3_Term_Loan_Details

4. Debt ACC3 Term Loan (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Mortgage notes payable	$115,000,000	$115,000,000
AccThreeTermLoan [Member]
Debt Instrument [Line Items]
Mortgage notes payable	115,000,000
Debt Instrument, Maturity Date	27-Mar-18
AccThreeTermLoan [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.55%
AccThreeTermLoan [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.55%
AccThreeTermLoan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	60.00%
AccThreeTermLoan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.7
Tangible Net Worth Amount	$1,300,000,000
Percentage Of Equity Offerings And Interests In Operating Partnerships To Be Added To Tangible Net Worth Threshold	80.00%
Debt Service Coverage Ratio	1.5

4_Debt_Unsecured_Term_Loan_Det

4. Debt Unsecured Term Loan (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Unsecured Term Loan	$250,000,000	$250,000,000
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Unsecured Term Loan	250,000,000
Debt Instrument, Maturity Date	21-Jul-19
Maximum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Unsecured Debt To Unencumbered Assets	60.00%
Ratio of Total Indebtedness To Gross Assets Value	60.00%
Minimum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Income from Unencumbered Assets To Unsecured Debt	12.50%
Fixed Charge Coverage Ratio	1.7
Tangible Net Worth Amount	$1,300,000,000
Percentage Of Equity Offerings And Interests In Operating Partnerships To Be Added To Tangible Net Worth Threshold	80.00%
Pricing Level 1 [Member] | Maximum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	35.00%
Pricing Level 2 [Member] | Maximum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	40.00%
Pricing Level 2 [Member] | Minimum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	35.00%
Pricing Level 3 [Member] | Maximum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	45.00%
Pricing Level 3 [Member] | Minimum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	40.00%
Pricing Level 4 [Member] | Maximum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	52.50%
Pricing Level 4 [Member] | Minimum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	45.00%
Pricing Level 5 [Member] | Minimum [Member] | Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	52.50%

4_Debt_Applicable_Margin_of_Un

4. Debt Applicable Margin of Unsecured Term Loan (Details) (Unsecured Term Loan [Member])	3 Months Ended
	Mar. 31, 2015
Pricing Level 1 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Pricing Level 1 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Pricing Level 2 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.60%
Pricing Level 2 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.60%
Pricing Level 3 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Pricing Level 3 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.75%
Pricing Level 4 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.90%
Pricing Level 4 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.90%
Pricing Level 5 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.10%
Pricing Level 5 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.10%
Maximum [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	60.00%
Maximum [Member] | Pricing Level 1 [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	35.00%
Maximum [Member] | Pricing Level 2 [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	40.00%
Maximum [Member] | Pricing Level 3 [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	45.00%
Maximum [Member] | Pricing Level 4 [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	52.50%
Minimum [Member] | Pricing Level 2 [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	35.00%
Minimum [Member] | Pricing Level 3 [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	40.00%
Minimum [Member] | Pricing Level 4 [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	45.00%
Minimum [Member] | Pricing Level 5 [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	52.50%

4_Debt_Credit_Rating_for_Unsec

4. Debt Credit Rating for Unsecured Term Loan (Details) (Unsecured Term Loan [Member], Unsecured Term Loan [Member])	3 Months Ended
	Mar. 31, 2015
Credit Rating Level 1 [Member] | Greater than A- S&P, Moody's A3 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.83%
Credit Rating Level 1 [Member] | Greater than A- S&P, Moody's A3 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Credit Rating Level 2 [Member] | Greater than BBB plus S&P, Moody's Baa1 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.88%
Credit Rating Level 2 [Member] | Greater than BBB plus S&P, Moody's Baa1 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Credit Rating Level 3 [Member] | Greater than BBB S&P, Moody's Baa2 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Credit Rating Level 3 [Member] | Greater than BBB S&P, Moody's Baa2 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Credit Rating Level 4 [Member] | Greater than BBB- S&P, Moody's Baa3 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Credit Rating Level 4 [Member] | Greater than BBB- S&P, Moody's Baa3 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.25%
Credit Rating Level 5 [Member] | Less than BBB- S&P, Moody's Baa3 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.65%
Credit Rating Level 5 [Member] | Less than BBB- S&P, Moody's Baa3 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.65%

4_Debt_Unsecured_Notes_due_202

4. Debt Unsecured Notes due 2021 (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Unsecured notes payable	$600,000	$600,000
Unsecured Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	24-Sep-13
Unsecured notes payable	$600,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.88%
Debt Instrument, Maturity Date	15-Sep-21
First Semiannual Interest Payment Term	March 15th
Second Semiannual Interest Payment Term	September 15th
Unencumbered Assets to Unsecured Debt	150.00%
Unsecured Notes due 2021 [Member] | Prior to September Fifteen Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Percentage Of Principal Amount At Which Unsecured Notes May Be Redeemed	100.00%
Unsecured Notes due 2021 [Member] | Change in control [Member]
Debt Instrument [Line Items]
Percentage Of Principal Amount At Which Unsecured Notes May Be Redeemed	101.00%
Unsecured Notes due 2021 [Member] | Asset Sales [Member]
Debt Instrument [Line Items]
Percentage Of Principal Amount At Which Unsecured Notes May Be Redeemed	100.00%

4_Debt_Summary_Of_Maturities_A

4. Debt Summary Of Maturities And Percentage Of Redemption Price Of Unsecured Notes (Details) (Unsecured Notes due 2021 [Member])	Mar. 31, 2015
2016
Debt Instrument [Line Items]
Redemption Price	104.41%
2017
Debt Instrument [Line Items]
Redemption Price	102.94%
2018
Debt Instrument [Line Items]
Redemption Price	101.47%
2019 and thereafter
Debt Instrument [Line Items]
Redemption Price	100.00%

4_Debt_Unsecured_Credit_Facili

4. Debt Unsecured Credit Facility (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	7-May-15
Debt Instrument [Line Items]
Line of credit	$150,000,000	$60,000,000
Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	560,000,000
Debt Instrument, Maturity Date	13-May-18
Extension Option On Debt Maturity Years	1
Basis Points Extension Fee On Total Commitment	15
Line Of Credit Commitment If Increased	800,000,000
Facility amount available for Letters of Credit	35,000,000
Letters of Credit Outstanding, Amount	100,000
Line of credit	150,000,000
Unsecured Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unsecured Debt To Unencumbered Assets	60.00%
Ratio of Total Indebtedness To Gross Assets Value	60.00%
Unsecured Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Income from Unencumbered Assets To Unsecured Debt	12.50%
Fixed Charge Coverage Ratio	1.7
Tangible Net Worth Amount	1,300,000,000
Percentage Of Equity Offerings And Interests In Operating Partnerships To Be Added To Tangible Net Worth Threshold	80.00%
Unsecured Credit Facility [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Line of credit			$180,000,000

4_Debt_Applicable_Margin_of_Un1

4. Debt Applicable Margin of Unsecured Credit Facility (Details) (Unsecured Credit Facility [Member])	3 Months Ended
	Mar. 31, 2015
Maximum [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	60.00%
Pricing Level 1 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.55%
Pricing Level 1 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.55%
Pricing Level 2 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.65%
Pricing Level 2 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.65%
Pricing Level 3 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.80%
Pricing Level 3 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.80%
Pricing Level 4 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.95%
Pricing Level 4 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.95%
Pricing Level 5 [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.15%
Pricing Level 5 [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.15%

4_Debt_Credit_Rating_for_Unsec1

4. Debt Credit Rating for Unsecured Credit Facility (Details) (Unsecured Credit Facility [Member])	3 Months Ended
	Mar. 31, 2015
Credit Rating Level 1 [Member] | Moody's, A3 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.88%
Credit Rating Level 1 [Member] | Moody's, A3 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Credit Rating Level 2 [Member] | Moody's, Baa1 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.93%
Credit Rating Level 2 [Member] | Moody's, Baa1 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Credit Rating Level 3 [Member] | Moody's, Baa2 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.05%
Credit Rating Level 3 [Member] | Moody's, Baa2 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.05%
Credit Rating Level 4 [Member] | Moody's, Baa3 Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.30%
Credit Rating Level 4 [Member] | Moody's, Baa3 Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.30%
Credit Rating Level 5 [Member] | Standard & Poor's, BBB- Rating [Member] | Libor Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.70%
Credit Rating Level 5 [Member] | Standard & Poor's, BBB- Rating [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.70%

4_Debt_Maturity_Summary_Detail

4. Debt Maturity Summary (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Debt Instrument [Line Items]
Long-term Debt	$1,115,000		$1,025,000
Total Debt in Percentage	100.00%
Debt, Weighted Average Interest Rate	3.90%
2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Percentage of Total Debt	0.00%
Debt, Weighted Average Interest Rate	0.00%
2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	3,750
Percentage of Total Debt	0.30%
Debt, Weighted Average Interest Rate	1.70%
2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	8,750
Percentage of Total Debt	0.80%
Debt, Weighted Average Interest Rate	1.70%
2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	252,500
Percentage of Total Debt	22.70%
Debt, Weighted Average Interest Rate	1.70%
2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	250,000
Percentage of Total Debt	22.40%
Debt, Weighted Average Interest Rate	1.70%
2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Percentage of Total Debt	0.00%
Debt, Weighted Average Interest Rate	0.00%
2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	600,000
Percentage of Total Debt	53.80%
Debt, Weighted Average Interest Rate	5.90%
Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	600,000		600,000
Percentage of Total Debt	54.00%
Fixed Rate Debt [Member] | 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Fixed Rate Debt [Member] | 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Fixed Rate Debt [Member] | 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Fixed Rate Debt [Member] | 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Fixed Rate Debt [Member] | 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Fixed Rate Debt [Member] | 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Fixed Rate Debt [Member] | 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	600,000	[1]
Floating Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Amount	515,000		425,000
Percentage of Total Debt	46.00%
Floating Rate Debt [Member] | 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Floating Rate Debt [Member] | 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	3,750	[2]
Floating Rate Debt [Member] | 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	8,750	[2]
Floating Rate Debt [Member] | 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	252,500	[2],[3]
Floating Rate Debt [Member] | 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	250,000	[4]
Floating Rate Debt [Member] | 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Floating Rate Debt [Member] | 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0
Unsecured Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	15-Sep-21
AccThreeTermLoan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	27-Mar-18
Debt Instrument, Frequency of Periodic Payment	Quarterly
AccThreeTermLoan [Member] | BeginningAprilOneTwoThousandSixteen [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	1,250
Debt Instrument, Date of First Required Payment	1-Apr-16
AccThreeTermLoan [Member] | BeginningAprilOneTwoThousandSeventeen [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	$2,500
Debt Instrument, Date of Increased Required Payment	1-Apr-17
Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	13-May-18
Extension Option On Debt Maturity Years	1
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	21-Jul-19
[1]	The 5.875% Unsecured Notes
[2]	The ACC3 Term Loan matures on March 27, 2018 with no extension option. Quarterly principal payments of $1.25 million begin on April 1, 2016, increase to $2.5 million on April 1, 2017 and continue through maturity.
[3]	The Unsecured Credit Facility matures on May 13, 2018 with a one-year extension option.
[4]	The Unsecured Term Loan matures on July 21, 2019 with no extension option.

5_Commitments_and_Contingencie1

5. Commitments and Contingencies (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Long-term Purchase Commitment [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	80.90%
Percentage Of Built In Gain That Can Be Recognized Without Triggering Tax Protection Provisions	80.00%
Initial Built In Gain	$667
Amount of Built In Gain That Can Be Recognized Without Triggering Tax Protection Provisions	534
Increase in Percentage of Built In Gain That Can Be Recognized Each Year Without Triggering Tax Protection Provisions	10.00%
Percentage Of Built In Gain That Can Be Recognized In Two Thousand Seventeen Without Triggering Tax Protection Provisions	100.00%
Built In Gain Amount Tax Protected	12
Built in Gain Amount Tax Protected, No Guarantee on Secured Loan	97
Percentage of Disinterested Members of Board for Approving Sales Resulting in Payments to Executives or Directors	75.00%
SC1 Phase IIB [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	55.2
Amount of Control Estimate Incurred	48.8
Total Commitments For Purchase of Equipment And Labor Related to Development	1.6
CH2 Phase I [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	165.1
Amount of Control Estimate Incurred	130.3
Total Commitments For Purchase of Equipment And Labor Related to Development	21
ACC7 Phase II [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	39.1
Amount of Control Estimate Incurred	1.8
Total Commitments For Purchase of Equipment And Labor Related to Development	12.6
Adjacent to Ashburn Corporate Center [Member]
Long-term Purchase Commitment [Line Items]
Purchase Price of Undeveloped Land Parcel	15.5
Purchase Of Underdeveloped Parcel Of Land In Acres	34.8
Part of Ashburn Corporate Center [Member]
Long-term Purchase Commitment [Line Items]
Purchase Price of Undeveloped Land Parcel	$4.60
Purchase Of Underdeveloped Parcel Of Land In Acres	8.7
Board of Directors Chairman [Member] | Adjacent to Ashburn Corporate Center [Member]
Long-term Purchase Commitment [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	7.00%
Board of Directors Chairman [Member] | Part of Ashburn Corporate Center [Member]
Long-term Purchase Commitment [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	23.00%
Board of Directors Vice-Chairman [Member] | Adjacent to Ashburn Corporate Center [Member]
Long-term Purchase Commitment [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	1.00%
Board of Directors Vice-Chairman [Member] | Part of Ashburn Corporate Center [Member]
Long-term Purchase Commitment [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	18.00%
Director [Member] | Part of Ashburn Corporate Center [Member]
Long-term Purchase Commitment [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	4.00%

6_Redeemable_noncontrolling_in1

6. Redeemable noncontrolling interests operating partnership / Redeemable partnership units (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Redeemable noncontrolling interests – operating partnership / Redeemable partnership units [Line Items]
Redeemable noncontrolling interests - operating partnership	$503,901	$513,134
Share Price	$32.68	$33.24
Redemption of operating partnership units, shares	18,000

7_Preferred_Stock_Details

7. Preferred Stock (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Series A cumulative redeemable perpetual preferred stock [Member]
Preferred Stock [Line Items]
Preferred stock, shares issued	7,400,000	7,400,000
Preferred Stock, Dividend Rate, Percentage	7.88%
Preferred stock, $.001 par value, 50,000,000 shares authorized	$185,000	$185,000
Preferred Stock, Liquidation Preference Per Share	$25
Preferred Stock, Dividends Per Share, Declared	$0.49
Dividends Payable, Date of Record	2-Apr-15
Dividends Payable, Date to be Paid	15-Apr-15
Series B cumulative redeemable perpetual preferred stock [Member]
Preferred Stock [Line Items]
Preferred stock, shares issued	6,650,000	6,650,000
Preferred Stock, Dividend Rate, Percentage	7.63%
Preferred stock, $.001 par value, 50,000,000 shares authorized	$166,250	$166,250
Preferred Stock, Liquidation Preference Per Share	$25
Preferred Stock, Dividends Per Share, Declared	$0.48
Dividends Payable, Date of Record	2-Apr-15
Dividends Payable, Date to be Paid	15-Apr-15

8_Stockholders_Equity_of_the_R1

8. Stockholders Equity of the REIT and Partners Capital of the OP (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Dividends declared per common share	$0.42	$0.35
Stock Repurchase Program, Authorized Amount	$120
Stock Repurchase Program Expiration Date	31-Dec-15
Common stock repurchase, shares	1,002,610
Common stock available for repurchase	88.1
Common Stock [Member]
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Dividends declared per common share	$0.42
Dividends Payable, Date of Record	2-Apr-15
Dividends Payable, Date to be Paid	15-Apr-15
Former CEO [Member]
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Supplemental Unemployment Benefits, Severance Benefits	1.3
Common Stock [Member] | Former CEO [Member]
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Deferred Compensation Arrangement with Individual, Shares Issued	55,742
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued	1.8
Common Stock [Member] | Board of Directors Vice-Chairman [Member]
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Deferred Compensation Arrangement with Individual, Shares Issued	346
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued	0.1
Performance Shares [Member] | Former CEO [Member]
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number	320,676
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	1.9
Stock Options [Member] | Former CEO [Member]
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	$0.30

9_Equity_Compensation_Plan_Nar

9. Equity Compensation Plan Narrative (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Equity Compensation Plan [Line Items]
Maximum Number of Share Equivalents Authorized	6,300,000
Share equivalent ratio, other than stock options and SARs	2.36
Cumulative Share Equivalents Issued From The Plan	3,198,419
Share Equivalents Remaining Available	3,101,581
Restricted Stock [Member]
Equity Compensation Plan [Line Items]
Shares of restricted stock, Granted	153,655
Value of Restricted Stock Awarded during period	$5
Shares of restricted stock, Vested	124,197
Value of Restricted Stock on Vesting Date	3.9
Unearned Compensation on Restricted Stock	9
Weighted Average Vesting Period	1 year 0 months 256 days
Performance Units, Forfeited	888
Common shares issued for performance units vested	352,559	323,989
Stock Options [Member]
Equity Compensation Plan [Line Items]
Weighted Average Vesting Period	0 years 0 months 329 days
Number of Options Granted	0
Performance Shares [Member]
Equity Compensation Plan [Line Items]
Unearned Compensation on Restricted Stock	$2.80
Performance Units, Forfeited	0
Common shares issued for performance units vested	0
Minimum [Member]
Equity Compensation Plan [Line Items]
Potential Number Of Shares Issued At Vesting Of Performance Units	0.00%
Maximum [Member]
Equity Compensation Plan [Line Items]
Potential Number Of Shares Issued At Vesting Of Performance Units	300.00%

9_Equity_Compensation_Plan_Sum

9. Equity Compensation Plan Summary of Restricted Stock (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Equity Compensation Plan [Line Items]
Weighted Average Grant Date Fair Value, Unvested balance at December 31, 2013	$24.10
Weighted Average Grant Date Fair Value, Granted	$32.26
Weighted Average Grant Date Fair Value, Vested	$23.78
Weighted Average Grant Date Fair Value, Forfeited	$24.61
Weighted Average Grant Date Fair Value, Unvested balance at March 31, 2014	$27.76
Restricted Stock [Member]
Equity Compensation Plan [Line Items]
Shares of restricted stock, Unvested balance at December 31, 2013	323,989
Shares of restricted stock, Granted	153,655
Shares of restricted stock, Vested	-124,197
Shares of restricted stock, Forfeited	-888
Shares of restricted stock, Unvested balance at March 31, 2014	352,559

9_Equity_Compensation_Plan_Sum1

9. Equity Compensation Plan Summary of Stock Options (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015
Equity Compensation Plan [Line Items]
Under option, December 31, 2013	1,592,854
Exercised	0
Forfeited	0
Under option, March 31, 2014	1,592,854
Weighted Average Exercise Price, Under Option, December 31, 2013	$19.09
Weighted Average Exercise Price, Granted	$0
Weighted Average Exercise Price, Exercised	$0
Weighted Average Exercise Price, Forfeited	$0
Weighted Average Exercise Price, Under Option, March 31, 2014	$19.09
Total Unearned Compensation	$0.20
Weighted Average Remaining Contractual Term	5 years 0 months 329 days
Stock Options [Member]
Equity Compensation Plan [Line Items]
Granted	0
Weighted Average Vesting Period	0 years 0 months 329 days

9_Equity_Compensation_Plan_Sum2

9. Equity Compensation Plan Summary of Unvested Stock Options (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Equity Compensation Plan [Line Items]
Unvested balance at December 31, 2013	302,324
Granted	0
Vested	-256,536
Forfeited	0
Unvested balance at March 31, 2014	45,788
Weighted Average Grant Date Fair Value, Unvested at December 31, 2013	$5.05
Weighted Average Grant Date Fair Value, Granted	$0
Weighted Average Grant Date Fair Value, Vested	$5.11
Weighted Average Grant Date Fair Value, Forfeited	$0
Weighted Average Grant Date Fair Value, Unvested at March 31, 2014	$4.75

9_Equity_Compensation_Plan_Sum3

9. Equity Compensation Plan Summary of Exercisable Stock Options (Details) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015
Equity Compensation Plan [Line Items]
Options Exercisable at December 31, 2013	1,290,530
Vested	256,536
Exercised	0
Options Exercisable at March 31, 2014	1,547,066
Weighted Average Grant Date Fair Value, Exercisable at December 31, 2013	$5.74
Weighted Average Grant Date Fair Value, Vested	$5.11
Weighted Average Grant Date Fair Value, Exercised	$0
Weighted Average Grant Date Fair Value, Exercisable at March 31, 2014	$5.63
Intrinsic Value	$21.20
Weighted Average Exercise Price	$18.99
Weighted Average Remaining Contractual Term	5 years 0 months 329 days

9_Equity_Compensation_Plan_Sum4

9. Equity Compensation Plan Summary of Assumptions Used for Performance Units Granted (Details) (Performance Shares [Member], USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015
Performance Shares [Member]
Equity Compensation Plan [Line Items]
Performance Units Granted In Period	48,674
Expected volatility	24.00%
Expected annual dividend	5.18%
Risk-free rate	1.06%
Performance unit fair value at date of grant	$38.34
Total grant fair value at date of grant (millions)	$1.90
Maximum value of grant on vesting date based on closing price of the Company's stock at the date of grant	$4.70

10_Earnings_Per_Share_of_the_R2

10. Earnings Per Share of the REIT (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings per share of the REIT [Line Items]
Weighted average common shares – basic	65,506,028	65,348,269
Effect of dilutive securities	950,243	475,652
Weighted average common shares – diluted	66,456,271	65,823,921
Net income attributable to common shares	$15,803	$20,045
Net income allocated to unvested restricted shares	-147	-116
Net income attributable to common shares, adjusted	15,656	19,929
Earnings per common share – basic	$0.24	$0.30
Net Income (Loss) Available to Common Stockholders, Diluted	15,656	20,045
Adjustments to redeemable noncontrolling interests	0	27
Adjusted net income available to common shares	$15,656	$20,072
Earnings per common share – diluted	$0.24	$0.30
Stock Options excluded from diluted earnings per share or unit	0	300,000
Performance Units excluded from diluted earnings per share or unit	0	200,000

11_Earnings_Per_Unit_of_the_Op2

11. Earnings Per Unit of the Operating Partnership (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
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)	80,926,265	80,956,206
Effect of dilutive securities	950,243	475,652
Weighted average common units – diluted	81,876,508	81,431,858
Stock Options excluded from diluted earnings per share or unit	0	300,000
Performance Units excluded from diluted earnings per share or unit	0	200,000

12_Fair_Value_Details

12. Fair Value (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$1,115,000,000	$1,025,000,000
Long-term Debt, Fair Value	$1,137,500,000

13_Supplemental_Consolidating_2

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes Supplemental Consolidating Balance Sheets (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	$83,793		$83,793
Buildings and improvements	2,624,963		2,623,539
Income producing property	2,708,756		2,707,332
Less: accumulated depreciation	-528,539		-504,869
Net income producing property	2,180,217		2,202,463
Construction in progress and land held for development	410,870	[1]	358,965
Net real estate	2,591,087		2,561,428
Cash and cash equivalents	27,059		29,598	71,786	38,733
Rents and other receivables	11,712		8,113
Deferred rent	138,582		142,365
Lease contracts above market value, net	7,779		8,054
Deferred costs, net	38,029		38,495
Prepaid expenses and other assets	50,431		48,295
Total assets	2,864,679		2,836,348
Line of credit	150,000		60,000
Mortgage notes payable	115,000		115,000
Unsecured Term Loan	250,000		250,000
Unsecured notes payable	600,000		600,000
Accounts payable and accrued liabilities	28,529		26,973
Construction costs payable	25,482		32,949
Accrued interest payable	1,943		10,759
Distribution payable	39,685		39,981
Lease contracts below market value, net	6,169		7,037
Prepaid rents and other liabilities	67,824		65,174
Total liabilities	1,284,632		1,207,873
Commitments and contingencies	0		0
Total liabilities and stockholders’ equity	2,864,679		2,836,348
DuPont Fabros Technology, L.P. [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	83,793		83,793
Buildings and improvements	2,624,963		2,623,539
Income producing property	2,708,756		2,707,332
Less: accumulated depreciation	-528,539		-504,869
Net income producing property	2,180,217		2,202,463
Construction in progress and land held for development	410,870		358,965
Net real estate	2,591,087		2,561,428
Cash and cash equivalents	22,841		25,380	67,568	34,514
Rents and other receivables	11,712		8,113
Deferred rent	138,582		142,365
Lease contracts above market value, net	7,779		8,054
Deferred costs, net	38,029		38,495
Investment in affiliates	0		0
Prepaid expenses and other assets	50,431		48,295
Total assets	2,860,461		2,832,130
Line of credit	150,000		60,000
Mortgage notes payable	115,000		115,000
Unsecured Term Loan	250,000		250,000
Unsecured notes payable	600,000		600,000
Accounts payable and accrued liabilities	28,529		26,973
Construction costs payable	25,482		32,949
Accrued interest payable	1,943		10,759
Distribution payable	39,685		39,981
Lease contracts below market value, net	6,169		7,037
Prepaid rents and other liabilities	67,824		65,174
Total liabilities	1,284,632		1,207,873
Redeemable partnership units	503,901		513,134
Commitments and contingencies	0		0
General Partners' Capital	7,302		7,619
Total partners’ capital	1,071,928		1,111,123
Total liabilities and stockholders’ equity	2,860,461		2,832,130
DuPont Fabros Technology, L.P. [Member] | Operating Partnership [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	0		0
Buildings and improvements	0		0
Income producing property	0		0
Less: accumulated depreciation	0		0
Net income producing property	0		0
Construction in progress and land held for development	0		0
Net real estate	0		0
Cash and cash equivalents	19,080		21,806	64,744	32,903
Rents and other receivables	1,391		1,775
Deferred rent	0		0
Lease contracts above market value, net	0		0
Deferred costs, net	15,192		15,957
Investment in affiliates	2,582,191		2,547,049
Prepaid expenses and other assets	2,746		2,865
Total assets	2,620,600		2,589,452
Line of credit	150,000		60,000
Mortgage notes payable	0		0
Unsecured Term Loan	250,000		250,000
Unsecured notes payable	600,000		600,000
Accounts payable and accrued liabilities	3,113		4,432
Construction costs payable	12		0
Accrued interest payable	1,937		10,754
Distribution payable	39,685		39,981
Lease contracts below market value, net	0		0
Prepaid rents and other liabilities	24		28
Total liabilities	1,044,771		965,195
Redeemable partnership units	503,901		513,134
Commitments and contingencies	0		0
General Partners' Capital	7,302		7,619
Total partners’ capital	1,071,928		1,111,123
Total liabilities and stockholders’ equity	2,620,600		2,589,452
DuPont Fabros Technology, L.P. [Member] | Subsidiary Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	79,935		79,935
Buildings and improvements	2,427,990		2,427,706
Income producing property	2,507,925		2,507,641
Less: accumulated depreciation	-495,120		-473,203
Net income producing property	2,012,805		2,034,438
Construction in progress and land held for development	152,820		145,229
Net real estate	2,165,625		2,179,667
Cash and cash equivalents	0		0	0
Rents and other receivables	6,461		5,513
Deferred rent	136,214		139,542
Lease contracts above market value, net	7,779		8,054
Deferred costs, net	16,366		16,098
Investment in affiliates	0		0
Prepaid expenses and other assets	43,518		43,866
Total assets	2,375,963		2,392,740
Line of credit	0		0
Mortgage notes payable	0		0
Unsecured Term Loan	0		0
Unsecured notes payable	0		0
Accounts payable and accrued liabilities	19,374		19,580
Construction costs payable	4,195		4,312
Accrued interest payable	0		0
Distribution payable	0		0
Lease contracts below market value, net	6,169		7,037
Prepaid rents and other liabilities	61,532		61,728
Total liabilities	91,270		92,657
Redeemable partnership units	0		0
Commitments and contingencies	0		0
General Partners' Capital	0		0
Total partners’ capital	2,284,693		2,300,083
Total liabilities and stockholders’ equity	2,375,963		2,392,740
DuPont Fabros Technology, L.P. [Member] | Subsidiary Non-Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	3,858		3,858
Buildings and improvements	196,973		195,833
Income producing property	200,831		199,691
Less: accumulated depreciation	-33,419		-31,666
Net income producing property	167,412		168,025
Construction in progress and land held for development	258,050		213,736
Net real estate	425,462		381,761
Cash and cash equivalents	3,761		3,574	2,824	1,611
Rents and other receivables	3,860		825
Deferred rent	2,368		2,823
Lease contracts above market value, net	0		0
Deferred costs, net	6,471		6,440
Investment in affiliates	0		0
Prepaid expenses and other assets	4,167		1,564
Total assets	446,089		396,987
Line of credit	0		0
Mortgage notes payable	115,000		115,000
Unsecured Term Loan	0		0
Unsecured notes payable	0		0
Accounts payable and accrued liabilities	6,042		2,961
Construction costs payable	21,275		28,637
Accrued interest payable	6		5
Distribution payable	0		0
Lease contracts below market value, net	0		0
Prepaid rents and other liabilities	6,268		3,418
Total liabilities	148,591		150,021
Redeemable partnership units			0
Commitments and contingencies	0		0
General Partners' Capital	0		0
Total partners’ capital	297,498		246,966
Total liabilities and stockholders’ equity	446,089		396,987
DuPont Fabros Technology, L.P. [Member] | Eliminations [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	0		0
Buildings and improvements	0		0
Income producing property	0		0
Less: accumulated depreciation	0		0
Net income producing property	0		0
Construction in progress and land held for development	0		0
Net real estate	0		0
Cash and cash equivalents	0		0	0	0
Rents and other receivables	0		0
Deferred rent	0		0
Lease contracts above market value, net	0		0
Deferred costs, net	0		0
Investment in affiliates	-2,582,191		-2,547,049
Prepaid expenses and other assets	0		0
Total assets	-2,582,191		-2,547,049
Line of credit	0		0
Mortgage notes payable	0		0
Unsecured Term Loan	0		0
Unsecured notes payable	0		0
Accounts payable and accrued liabilities	0		0
Construction costs payable	0		0
Accrued interest payable	0		0
Distribution payable	0		0
Lease contracts below market value, net	0		0
Prepaid rents and other liabilities	0		0
Total liabilities	0		0
Redeemable partnership units			0
Commitments and contingencies	0		0
General Partners' Capital	0		0
Total partners’ capital	-2,582,191		-2,547,049
Total liabilities and stockholders’ equity	-2,582,191		-2,547,049
DuPont Fabros Technology, L.P. [Member] | Series A Preferred Stock [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	185,000		185,000
DuPont Fabros Technology, L.P. [Member] | Series A Preferred Stock [Member] | Operating Partnership [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	185,000		185,000
DuPont Fabros Technology, L.P. [Member] | Series A Preferred Stock [Member] | Subsidiary Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	0		0
DuPont Fabros Technology, L.P. [Member] | Series A Preferred Stock [Member] | Subsidiary Non-Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	0		0
DuPont Fabros Technology, L.P. [Member] | Series A Preferred Stock [Member] | Eliminations [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	0		0
DuPont Fabros Technology, L.P. [Member] | Series B Preferred Stock [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	166,250		166,250
DuPont Fabros Technology, L.P. [Member] | Series B Preferred Stock [Member] | Operating Partnership [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	166,250		166,250
DuPont Fabros Technology, L.P. [Member] | Series B Preferred Stock [Member] | Subsidiary Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	0		0
DuPont Fabros Technology, L.P. [Member] | Series B Preferred Stock [Member] | Subsidiary Non-Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	0		0
DuPont Fabros Technology, L.P. [Member] | Series B Preferred Stock [Member] | Eliminations [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	0		0
DuPont Fabros Technology, L.P. [Member] | Limited partners' common units [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	713,376		752,254
DuPont Fabros Technology, L.P. [Member] | Limited partners' common units [Member] | Operating Partnership [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	713,376		752,254
DuPont Fabros Technology, L.P. [Member] | Limited partners' common units [Member] | Subsidiary Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	2,284,693		2,300,083
DuPont Fabros Technology, L.P. [Member] | Limited partners' common units [Member] | Subsidiary Non-Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	297,498		246,966
DuPont Fabros Technology, L.P. [Member] | Limited partners' common units [Member] | Eliminations [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	($2,582,191)		($2,547,049)
[1]	(1)Properties located in Ashburn, VA (ACC7 Phases II-IV and ACC8); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2) and Santa Clara, CA (SC1 Phase IIB and SC2).

13_Supplemental_Consolidating_3

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes Supplemental Consolidating Statements of Operations (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Base rent	$71,573,000	$69,204,000
Recoveries from tenants	33,305,000	31,689,000
Other revenues	2,436,000	1,194,000
Total revenues	107,314,000	102,087,000
Expenses:
Property operating costs	31,493,000	30,095,000
Real estate taxes and insurance	3,976,000	3,467,000
Depreciation and amortization	25,027,000	23,269,000
General and administrative	4,343,000	4,240,000
Other expenses	7,253,000	873,000
Total expenses	72,092,000	61,944,000
Operating income	35,222,000	40,143,000
Interest income	11,000	68,000
Interest:
Expense incurred	-8,258,000	-7,824,000
Amortization of deferred financing costs	-642,000	-743,000
Net income	26,333,000	31,644,000
Preferred stock dividends	-6,811,000	-6,811,000
Depreciation	23,900,000	22,200,000
DuPont Fabros Technology, L.P. [Member]
Revenues:
Base rent	71,573,000	69,204,000
Recoveries from tenants	33,305,000	31,689,000
Other revenues	2,436,000	1,194,000
Total revenues	107,314,000	102,087,000
Expenses:
Property operating costs	31,493,000	30,095,000
Real estate taxes and insurance	3,976,000	3,467,000
Depreciation and amortization	25,027,000	23,269,000
General and administrative	4,343,000	4,240,000
Other expenses	7,253,000	873,000
Total expenses	72,092,000	61,944,000
Operating income	35,222,000	40,143,000
Interest income	11,000	68,000
Interest:
Expense incurred	-8,258,000	-7,824,000
Amortization of deferred financing costs	-642,000	-743,000
Equity in earnings	0	0
Net income	26,333,000	31,644,000
Preferred stock dividends	-6,811,000	-6,811,000
Net income attributable to common units	19,522,000	24,833,000
DuPont Fabros Technology, L.P. [Member] | Operating Partnership [Member]
Revenues:
Base rent	4,506,000	4,226,000
Recoveries from tenants	0	0
Other revenues	0	0
Total revenues	4,506,000	4,226,000
Expenses:
Property operating costs	0	0
Real estate taxes and insurance	0	0
Depreciation and amortization	11,000	16,000
General and administrative	4,213,000	3,907,000
Other expenses	5,591,000	256,000
Total expenses	9,815,000	4,179,000
Operating income	-5,309,000	47,000
Interest income	11,000	67,000
Interest:
Expense incurred	-10,614,000	-10,210,000
Amortization of deferred financing costs	-765,000	-822,000
Equity in earnings	43,010,000	42,562,000
Net income	26,333,000	31,644,000
Preferred stock dividends	-6,811,000	-6,811,000
Net income attributable to common units	19,522,000	24,833,000
DuPont Fabros Technology, L.P. [Member] | Subsidiary Guarantors [Member]
Revenues:
Base rent	66,284,000	64,966,000
Recoveries from tenants	30,824,000	29,409,000
Other revenues	426,000	409,000
Total revenues	97,534,000	94,784,000
Expenses:
Property operating costs	32,407,000	31,862,000
Real estate taxes and insurance	3,667,000	3,357,000
Depreciation and amortization	23,006,000	22,117,000
General and administrative	15,000	16,000
Other expenses	0	11,000
Total expenses	59,095,000	57,363,000
Operating income	38,439,000	37,421,000
Interest income	0	0
Interest:
Expense incurred	981,000	1,328,000
Amortization of deferred financing costs	81,000	75,000
Equity in earnings	0	0
Net income	39,501,000	38,824,000
Preferred stock dividends	0	0
Net income attributable to common units	39,501,000	38,824,000
DuPont Fabros Technology, L.P. [Member] | Subsidiary Non-Guarantors [Member]
Revenues:
Base rent	5,327,000	4,276,000
Recoveries from tenants	2,481,000	2,280,000
Other revenues	2,027,000	798,000
Total revenues	9,835,000	7,354,000
Expenses:
Property operating costs	3,610,000	2,472,000
Real estate taxes and insurance	309,000	110,000
Depreciation and amortization	2,010,000	1,136,000
General and administrative	115,000	317,000
Other expenses	1,699,000	644,000
Total expenses	7,743,000	4,679,000
Operating income	2,092,000	2,675,000
Interest income	0	1,000
Interest:
Expense incurred	1,375,000	1,058,000
Amortization of deferred financing costs	42,000	4,000
Equity in earnings	0	0
Net income	3,509,000	3,738,000
Preferred stock dividends	0	0
Net income attributable to common units	3,509,000	3,738,000
DuPont Fabros Technology, L.P. [Member] | Eliminations [Member]
Revenues:
Base rent	-4,544,000	-4,264,000
Recoveries from tenants	0	0
Other revenues	-17,000	-13,000
Total revenues	-4,561,000	-4,277,000
Expenses:
Property operating costs	-4,524,000	-4,239,000
Real estate taxes and insurance	0	0
Depreciation and amortization	0	0
General and administrative	0	0
Other expenses	-37,000	-38,000
Total expenses	-4,561,000	-4,277,000
Operating income	0	0
Interest income	0	0
Interest:
Expense incurred	0	0
Amortization of deferred financing costs	0	0
Equity in earnings	-43,010,000	-42,562,000
Net income	-43,010,000	-42,562,000
Preferred stock dividends	0	0
Net income attributable to common units	($43,010,000)	($42,562,000)

13_Supplemental_Consolidating_4

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes Supplemental Consodlidating Statements of Cash Flows (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Supplemental Consolidating Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	$49,092	$44,491
Investments in real estate – development	-57,584	-80,159
Interest capitalized for real estate under development	-2,856	-2,965
Improvements to real estate	-574	-425
Additions to non-real estate property	-176	-220
Net cash used in investing activities	-61,190	-83,769
Proceeds	90,000	0
Proceeds	0	96,000
Payments of financing costs	0	-96
Equity compensation (payments) proceeds	7,489	-3,457
Payments for Repurchase of Common Stock	-31,912	0
Net cash provided by financing activities	9,559	72,331
Net increase (decrease) in cash and cash equivalents	-2,539	33,053
Cash and cash equivalents, beginning	29,598	38,733
Cash and cash equivalents, ending	27,059	71,786
DuPont Fabros Technology, L.P. [Member]
Supplemental Consolidating Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	49,092	44,492
Investments in real estate – development	-57,584	-80,159
Investments in affiliates	0	0
Interest capitalized for real estate under development	-2,856	-2,965
Improvements to real estate	-574	-425
Additions to non-real estate property	-176	-220
Net cash used in investing activities	-61,190	-83,769
Proceeds	90,000	0
Proceeds	0	96,000
Payments of financing costs	0	-96
Equity compensation (payments) proceeds	7,489	-3,457
Payments for Repurchase of Common Stock	-31,912	0
Distributions	-41,040	-27,030
Net cash provided by financing activities	9,559	72,331
Net increase (decrease) in cash and cash equivalents	-2,539	33,054
Cash and cash equivalents, beginning	25,380	34,514
Cash and cash equivalents, ending	22,841	67,568
DuPont Fabros Technology, L.P. [Member] | Operating Partnership [Member]
Supplemental Consolidating Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	-16,885	-11,706
Investments in real estate – development	-220	-152
Investments in affiliates	4,831	-28,651
Interest capitalized for real estate under development	-6	-1
Improvements to real estate	0	0
Additions to non-real estate property	-5	-5
Net cash used in investing activities	4,600	-28,809
Proceeds	90,000
Proceeds		96,000
Payments of financing costs		-71
Equity compensation (payments) proceeds	7,489	-3,457
Payments for Repurchase of Common Stock	-31,912
Distributions	-41,040	-27,030
Net cash provided by financing activities	9,559	72,356
Net increase (decrease) in cash and cash equivalents	-2,726	31,841
Cash and cash equivalents, beginning	21,806	32,903
Cash and cash equivalents, ending	19,080	64,744
DuPont Fabros Technology, L.P. [Member] | Subsidiary Guarantors [Member]
Supplemental Consolidating Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	59,837	50,066
Investments in real estate – development	-4,599	-44,951
Investments in affiliates	-53,565	-3,162
Interest capitalized for real estate under development	-980	-1,328
Improvements to real estate	-522	-425
Additions to non-real estate property	-171	-200
Net cash used in investing activities	-59,837	-50,066
Proceeds	0
Proceeds		0
Payments of financing costs		0
Equity compensation (payments) proceeds	0	0
Payments for Repurchase of Common Stock	0
Distributions	0	0
Net cash provided by financing activities	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents, beginning	0
Cash and cash equivalents, ending	0	0
DuPont Fabros Technology, L.P. [Member] | Subsidiary Non-Guarantors [Member]
Supplemental Consolidating Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	6,140	6,132
Investments in real estate – development	-52,765	-35,056
Investments in affiliates	48,734	31,813
Interest capitalized for real estate under development	-1,870	-1,636
Improvements to real estate	-52	0
Additions to non-real estate property	0	-15
Net cash used in investing activities	-5,953	-4,894
Proceeds	0
Proceeds		0
Payments of financing costs		-25
Equity compensation (payments) proceeds	0	0
Payments for Repurchase of Common Stock	0
Distributions	0	0
Net cash provided by financing activities	0	-25
Net increase (decrease) in cash and cash equivalents	187	1,213
Cash and cash equivalents, beginning	3,574	1,611
Cash and cash equivalents, ending	3,761	2,824
DuPont Fabros Technology, L.P. [Member] | Eliminations [Member]
Supplemental Consolidating Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	0	0
Investments in real estate – development	0	0
Investments in affiliates	0	0
Interest capitalized for real estate under development	0	0
Improvements to real estate	0	0
Additions to non-real estate property	0	0
Net cash used in investing activities	0	0
Proceeds	0
Proceeds		0
Payments of financing costs		0
Equity compensation (payments) proceeds	0	0
Payments for Repurchase of Common Stock	0
Distributions	0	0
Net cash provided by financing activities	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents, beginning	0	0
Cash and cash equivalents, ending	$0	$0