Dupont Fabros Technology 10-Q 28 Apr 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2016	Apr. 22, 2016
Entity Information [Line Items]
Entity Registrant Name	DUPONT FABROS TECHNOLOGY, INC.
Entity Central Index Key	1,407,739
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		74,421,485
DuPont Fabros Technology, L.P. [Member]
Entity Information [Line Items]
Entity Registrant Name	DUPONT FABROS TECHNOLOGY, L.P.
Entity Central Index Key	1,418,175
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016		Dec. 31, 2015
Income producing property:
Land	$ 94,203		$ 94,203
Buildings and improvements	2,741,894		2,736,936
Income producing property	2,836,097		2,831,139
Less: accumulated depreciation	(585,338)		(560,837)
Net income producing property	2,250,759		2,270,302
Construction in progress and land held for development	372,438	[1]	300,939
Net real estate	2,623,197		2,571,241
Cash and cash equivalents	242,533		31,230
Rents and other receivables	9,685		9,588
Deferred rent	130,678		128,941
Lease contracts above market value, net	5,806		6,029
Deferred costs, net	24,018		23,774
Prepaid expenses and other assets	45,315		44,689
Total assets	3,081,232		2,815,492
Liabilities:
Line of credit	0		0
Mortgage notes payable	114,183		114,075
Unsecured Term Loan	249,236		249,172
Unsecured notes payable	835,552		834,963
Accounts payable and accrued liabilities	28,094		32,301
Construction costs payable	21,247		22,043
Accrued interest payable	6,512		11,821
Dividend and distribution payable	47,724		43,906
Lease contracts below market value, net	3,793		4,132
Prepaid rents and other liabilities	67,037		67,477
Total liabilities	1,373,378		1,379,890
Redeemable noncontrolling interests - operating partnership	603,154		479,189
Redeemable partnership units	603,154		479,189
Commitments and contingencies	0		0
Stockholders’ equity:
Common stock, $.001 par value, 250,000,000 shares authorized, 74,421,820 shares issued and outstanding at March 31, 2016 and 66,105,650 shares issued and outstanding at December 31, 2015	74		66
Additional paid in capital	808,913		685,042
Retained earnings (accumulated deficit)	(55,537)		(79,945)
Total stockholders’ equity	1,104,700		956,413
Total liabilities and stockholders’ equity	3,081,232		2,815,492
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]
Income producing property:
Land	94,203		94,203
Buildings and improvements	2,741,894		2,736,936
Income producing property	2,836,097		2,831,139
Less: accumulated depreciation	(585,338)		(560,837)
Net income producing property	2,250,759		2,270,302
Construction in progress and land held for development	372,438		300,939
Net real estate	2,623,197		2,571,241
Cash and cash equivalents	238,318		27,015
Rents and other receivables	9,685		9,588
Deferred rent	130,678		128,941
Lease contracts above market value, net	5,806		6,029
Deferred costs, net	24,018		23,774
Prepaid expenses and other assets	45,315		44,689
Total assets	3,077,017		2,811,277
Liabilities:
Line of credit	0		0
Mortgage notes payable	114,183		114,075
Unsecured Term Loan	249,236		249,172
Unsecured notes payable	835,552		834,963
Accounts payable and accrued liabilities	28,094		32,301
Construction costs payable	21,247		22,043
Accrued interest payable	6,512		11,821
Dividend and distribution payable	47,724		43,906
Lease contracts below market value, net	3,793		4,132
Prepaid rents and other liabilities	67,037		67,477
Total liabilities	1,373,378		1,379,890
Redeemable noncontrolling interests - operating partnership	603,154		479,189
Redeemable partnership units	603,154		479,189
Commitments and contingencies	0		0
Stockholders’ equity:
Total liabilities and stockholders’ equity	3,077,017		2,811,277
Limited partners’ capital:
General partner’s capital, common units, 662,373 issued and outstanding at March 31, 2016 and December 31, 2015	6,668		6,021
Total partners’ capital	1,100,485		952,198
DuPont Fabros Technology, L.P. [Member] | Series A Preferred Stock [Member]
Limited partners’ capital:
Limited partners' capital	185,000		185,000
DuPont Fabros Technology, L.P. [Member] | Series B Preferred Stock [Member]
Limited partners’ capital:
Limited partners' capital	166,250		166,250
Series A cumulative redeemable perpetual preferred units [Member] | DuPont Fabros Technology, L.P. [Member]
Limited partners’ capital:
Limited partners' capital	185,000		185,000
Series B cumulative redeemable perpetual preferred units [Member] | DuPont Fabros Technology, L.P. [Member]
Limited partners’ capital:
Limited partners' capital	166,250		166,250
Limited partners' common units [Member] | DuPont Fabros Technology, L.P. [Member]
Limited partners’ capital:
Limited partners' capital	$ 742,567		$ 594,927
[1]	(1)Properties located in Ashburn, VA (ACC7 Phases III-IV, ACC8, ACC9, ACC10, and ACC11); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2 Phases II-III and CH3) and Santa Clara, CA (SC1 Phase III, formerly referred to as SC2).

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	50,000,000	50,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	74,421,820	66,105,650
Common stock, shares outstanding	74,421,820	66,105,650
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	73,759,447	65,443,277
Limited partners' capital, common units outstanding	73,759,447	65,443,277

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Base rent	$ 82,533	$ 71,573
Recoveries from tenants	38,694	33,305
Other revenues	2,922	2,436
Total revenues	124,149	107,314
Expenses:
Property operating costs	35,955	31,493
Real estate taxes and insurance	5,316	3,976
Depreciation and amortization	25,843	25,027
General and administrative	5,575	4,343
Other expenses	2,349	7,253
Total expenses	75,038	72,092
Operating income	49,111	35,222
Interest:
Expense incurred	(11,569)	(8,247)
Amortization of deferred financing costs	(845)	(642)
Net income	36,697	26,333
Net loss (income) attributable to redeemable noncontrolling interests – operating partnership	(5,478)	(3,719)
Net (loss) income attributable to controlling interests	31,219	22,614
Preferred stock dividends	(6,811)	(6,811)
Net (loss) income attributable to common shares	24,408	15,803
Net income attributable to common units	$ 29,886	$ 19,522
Earnings per share – basic:
Net income attributable to common shares	$ 0.36	$ 0.24
Weighted average common shares outstanding	66,992,995	65,506,028
Earnings per share – diluted:
Net income attributable to common shares	$ 0.36	$ 0.24
Weighted average common shares outstanding	67,846,115	66,456,271
Dividends declared per common share	$ 0.47	$ 0.42
Earnings per unit – basic:
Net income attributable to common units	0.36	0.24
Earnings per unit – diluted:
Net income attributable to common units	$ 0.36	$ 0.24
DuPont Fabros Technology, L.P. [Member]
Revenues:
Base rent	$ 82,533	$ 71,573
Recoveries from tenants	38,694	33,305
Other revenues	2,922	2,436
Total revenues	124,149	107,314
Expenses:
Property operating costs	35,955	31,493
Real estate taxes and insurance	5,316	3,976
Depreciation and amortization	25,843	25,027
General and administrative	5,575	4,343
Other expenses	2,349	7,253
Total expenses	75,038	72,092
Operating income	49,111	35,222
Interest:
Expense incurred	(11,569)	(8,247)
Amortization of deferred financing costs	(845)	(642)
Net income	36,697	26,333
Preferred stock dividends	(6,811)	(6,811)
Net income attributable to common units	$ 29,886	$ 19,522
Earnings per unit – basic:
Net income attributable to common units	$ 0.36	$ 0.24
Weighted average common units outstanding	82,028,440	80,926,265
Earnings per unit – diluted:
Net income attributable to common units	$ 0.36	$ 0.24
Weighted Average Limited Partnership Units Outstanding, Diluted	82,881,560	81,876,508
Distributions declared per unit	$ 0.47	$ 0.42

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - 3 months ended Mar. 31, 2016 - USD ($) $ in Thousands	Total	PreferredStock/Units [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2015	$ 956,413	$ 351,250	$ 66	$ 685,042	$ (79,945)
Balance, shares at Dec. 31, 2015	66,105,650
Net income attributable to controlling interests	$ 31,219				31,219
Stock Issued During Period, Shares, New Issues	7,613,000
Stock Issued During Period, Value, New Issues	$ 275,401		8	275,393
Dividends declared on common stock	(34,978)			(34,978)	0
Dividends earned on preferred stock	$ (6,811)			0	(6,811)
Redemption of operating partnership units, shares	191,900
Redemption of operating partnership units	$ 6,101		0	6,101
Issuance of stock awards, shares	169,380
Issuance of stock awards	$ 0		0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	410,404
Stock Issued During Period, Value, Stock Options Exercised	$ 9,237		0	9,237
Retirement and forfeiture of stock awards, shares	(68,514)
Retirement and forfeiture of stock awards	$ (2,230)		0	(2,230)
Amortization of deferred compensation costs	1,930			1,930
Adjustments to redeemable noncontrolling interests – operating partnership	(131,582)			(131,582)
Balance at Mar. 31, 2016	$ 1,104,700	$ 351,250	$ 74	$ 808,913	$ (55,537)
Balance, shares at Mar. 31, 2016	74,421,820

Consolidated Statement of Partn

Consolidated Statement of Partners' Capital - 3 months ended Mar. 31, 2016 - USD ($) $ in Thousands	Total	DuPont Fabros Technology, L.P. [Member]	DuPont Fabros Technology, L.P. [Member]Limited Partners' Capital - Preferred [Member]	DuPont Fabros Technology, L.P. [Member]Limited Partners' Capital - Common [Member]	DuPont Fabros Technology, L.P. [Member]General Partner's Capital [Member]
Balance at Dec. 31, 2015		$ 952,198	$ 351,250	$ 594,927	$ 6,021
Balance, units at Dec. 31, 2015				65,443,277	662,373
Net income	$ 36,697	36,697		$ 36,370	$ 327
Stock Issued During Period, Shares, New Issues	7,613,000			7,613,000
Stock Issued During Period, Value, New Issues	$ 275,401	275,401		$ 275,401
Common unit distributions		(41,972)		(41,661)	(311)
Preferred unit distributions		$ (6,811)		$ (6,750)	(61)
Redemption of operating partnership units, shares	191,900	191,900		191,900
Redemption of operating partnership units	$ 6,101	$ 6,101		$ 6,101
Issuance of OP units for stock awards, units				169,380
Issuance of OP units for stock awards		0		$ 0
Issuance of OP units due to option exercises				410,404
Partners' Capital Account, Option Exercise		9,237		$ 9,237
Retirement and forfeiture of OP units, units				(68,514)
Retirement and forfeiture of OP units		(2,230)		$ (2,230)
Amortization of deferred compensation costs	$ 1,930	1,930		1,930
Adjustments to redeemable partnership units		(130,066)		(130,758)	692
Balance at Mar. 31, 2016		$ 1,100,485	$ 351,250	$ 742,567	$ 6,668
Balance, units at Mar. 31, 2016				73,759,447	662,373

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flow from operating activities
Net income	$ 36,697	$ 26,333
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	25,843	25,027
Straight line rent	(1,737)	3,783
Amortization of Deferred financing costs	845	642
Amortization of lease contracts above and below market value	(116)	(593)
Compensation paid with Company common shares	1,769	5,290
Changes in operating assets and liabilities
Rents and other receivables	(97)	(3,599)
Deferred costs	(1,611)	(1,474)
Prepaid expenses and other assets	61	(2,052)
Accounts payable and accrued liabilities	(4,599)	1,916
Accrued interest payable	(5,309)	(8,816)
Prepaid rents and other liabilities	(407)	2,635
Net cash provided by operating activities	51,339	49,092
Cash flow from investing activities
Investments in real estate – development	(52,302)	(57,584)
Land acquisition costs - related party	(20,168)	0
Interest capitalized for real estate under development	(3,183)	(2,856)
Improvements to real estate	(2,099)	(574)
Additions to non-real estate property	(123)	(176)
Net cash used in investing activities	(77,875)	(61,190)
Line of credit:
Proceeds	60,000	90,000
Repayments of Lines of Credit	(60,000)	0
Proceeds from Issuance of Common Stock	275,797	0
Equity compensation (payments) proceeds	7,007	(7,489)
Payments for Repurchase of Common Stock	0	(31,912)
Dividends and distributions:
Common shares	(31,070)	(27,745)
Preferred shares	(6,811)	(6,811)
Redeemable noncontrolling interests – operating partnership	(7,084)	(6,484)
Net cash provided by financing activities	237,839	9,559
Net increase (decrease) in cash and cash equivalents	211,303	(2,539)
Cash and cash equivalents, beginning	31,230	29,598
Cash and cash equivalents, ending	242,533	27,059
Supplemental information:
Cash paid for interest	20,063	19,930
Deferred financing costs capitalized for real estate under development	217	231
Construction costs payable capitalized for real estate under development	21,247	25,482
Redemption of operating partnership units	6,101	598
Adjustments to redeemable noncontrolling interests – operating partnership	131,582	(5,878)
DuPont Fabros Technology, L.P. [Member]
Cash flow from operating activities
Net income	36,697	26,333
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	25,843	25,027
Straight line rent	(1,737)	3,783
Amortization of Deferred financing costs	845	642
Amortization of lease contracts above and below market value	(116)	(593)
Compensation paid with Company common shares	1,769	5,290
Changes in operating assets and liabilities
Rents and other receivables	(97)	(3,599)
Deferred costs	(1,611)	(1,474)
Prepaid expenses and other assets	61	(2,052)
Accounts payable and accrued liabilities	(4,599)	1,916
Accrued interest payable	(5,309)	(8,816)
Prepaid rents and other liabilities	(407)	2,635
Net cash provided by operating activities	51,339	49,092
Cash flow from investing activities
Investments in real estate – development	(52,302)	(57,584)
Land acquisition costs - related party	(20,168)	0
Interest capitalized for real estate under development	(3,183)	(2,856)
Improvements to real estate	(2,099)	(574)
Additions to non-real estate property	(123)	(176)
Net cash used in investing activities	(77,875)	(61,190)
Line of credit:
Proceeds	60,000	90,000
Repayments of Lines of Credit	(60,000)	0
Proceeds from Issuance of Common Stock	275,797	0
Equity compensation (payments) proceeds	7,007	(7,489)
Payments for Repurchase of Common Stock	0	(31,912)
Distributions	(44,965)	(41,040)
Dividends and distributions:
Net cash provided by financing activities	237,839	9,559
Net increase (decrease) in cash and cash equivalents	211,303	(2,539)
Cash and cash equivalents, beginning	27,015	25,380
Cash and cash equivalents, ending	238,318	22,841
Supplemental information:
Cash paid for interest	20,063	19,930
Deferred financing costs capitalized for real estate under development	217	231
Construction costs payable capitalized for real estate under development	21,247	25,482
Redemption of operating partnership units	6,101	598
Adjustments to redeemable noncontrolling interests – operating partnership	$ 130,066	$ (8,635)

1. Description of Business

1. Description of Business	3 Months Ended
	Mar. 31, 2016
Description of Business [Abstract]
Nature of Operations [Text Block]	Description of Business DuPont Fabros Technology, Inc., or 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, 2016 , owned 83.3% of the common economic interest in the Operating Partnership, of which 0.9% 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, 2016 , we held a fee simple interest in the following properties: • 12 operating data centers – ACC2, ACC3, ACC4, ACC5, ACC6, ACC7 Phases I-II, VA3, VA4, CH1, CH2 Phase I, NJ1 Phase I and SC1 Phases I-II; • six data center projects under development – ACC7 Phases III-IV, CH2 Phases II-III, ACC9 Phase I and SC1 Phase III (formerly referred to as SC2); • data center projects available for future development – NJ1 Phase II and ACC9 Phase II; and • land that may be used to develop additional data centers – ACC8, ACC10, ACC11 and CH3. In April 2016, w e placed CH2 Phase II into service.

2. Significant Accounting Polic

2. Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
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, 2016 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, through its wholly-owned subsidiaries, 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, 2016 was 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, 2016 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, 2015 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 $24.7 million and $23.9 million for the three months ended March 31, 2016 and 2015 , respectively. Repairs and maintenance costs are expensed as incurred. We review each of our properties for indicators of impairment. Examples of such indicators may include a significant decrease in the market price of the property, a significant adverse change in the extent or manner in which the property is being used in its physical condition, a significant adverse change in legal factors or in the business climate that could affect the value of a property, including an adverse action or assessment by a regulator, an accumulation of costs significantly in excess of the amount originally expected for the development of a property, a history of operating or cash flow losses of the property or a current expectation that, more likely than not, a property will be sold or otherwise disposed of significantly before the end of its previously estimated useful life. When such impairment indicators exist, we review an estimate of the future undiscounted net cash flows expected to result from the real estate investment’s use and eventual disposition and compare that estimate to the carrying value of the property. We assess the recoverability of the carrying value of our assets on a property-by-property basis. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition, potential sales proceeds and other factors. If our undiscounted cash flow evaluation indicates that we are unable to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property. No impairment losses were recorded during the three months ended March 31, 2016 and 2015 . We classify a data center property as held-for-sale when it meets the necessary criteria, which include when we commit to and actively embark on a plan to sell the asset, the sale is expected to be completed within one year under terms usual and customary for such sales, and actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Data center properties held-for-sale are carried at the lower of cost or fair value less costs to sell. We are marketing our NJ1 data center for sale. Because we have never sold a data center facility since becoming a public company in 2007 and therefore have no history of selling data center assets, we are not reasonably assured that the sale of NJ1 will occur within one year. Accordingly, as of March 31, 2016 and December 31, 2015 , we did not classify our NJ1 data center as held-for-sale. 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. Balances of financing costs for our unsecured revolving credit facility, or Unsecured Credit Facility, net of accumulated amortization, which are presented within deferred costs, net in our accompanying consolidated balance sheets at March 31, 2016 and December 31, 2015 were as follows (in thousands): Financing costs presented within deferred costs, net March 31, December 31, Financing costs $ 8,200 $ 8,198 Accumulated amortization (5,319 ) (4,969 ) Financing costs, net $ 2,881 $ 3,229 Balances of financing costs for our other recognized debt liabilities, net of accumulated amortization, which are presented as a reduction of each of the respective recognized debt liabilities in our accompanying consolidated balance sheets at March 31, 2016 and December 31, 2015 were as follows (in thousands): Financing costs presented as a reduction of debt liability balances March 31, December 31, Financing costs $ 20,531 $ 20,531 Accumulated amortization (6,328 ) (5,618 ) Financing costs, net $ 14,203 $ 14,913 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. In June 2015, we wrote off $0.7 million of unamortized leasing costs to amortization expense related to a customer in bankruptcy whose leases with us were rejected effective July 1, 2015 pursuant to an order made by the bankruptcy court. Leasing costs incurred for the three months ended March 31, 2016 and 2015 were as follows (in thousands): Three months ended March 31, 2016 2015 Leasing costs incurred for new leases $ 1,600 $ 373 Leasing costs incurred for renewals 11 1,101 Total leasing costs incurred $ 1,611 $ 1,474 Amortization of deferred leasing costs totaled $1.0 million and $1.1 million for the three months ended March 31, 2016 and 2015 , respectively. Balances, net of accumulated amortization, at March 31, 2016 and December 31, 2015 were as follows (in thousands): March 31, December 31, Leasing costs $ 52,114 $ 50,503 Accumulated amortization (30,977 ) (29,958 ) Leasing costs, net $ 21,137 $ 20,545 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, 2016 and December 31, 2015 , the fuel inventory was $4.5 million 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 lease, 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. Straight-line rents receivable are included in deferred rent, net in the accompanying consolidated balance sheets. Lease inducements, which include cash payments to customers, are amortized as a reduction of rental income over the non-cancellable lease term. Lease inducements are included in prepaid expenses and other assets 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 straight-line rents receivable, lease inducements and lease intangibles associated with that lease will be written off to rental revenue. Balances, net of accumulated amortization, at March 31, 2016 and December 31, 2015 were as follows (in thousands): March 31, December 31, Lease contracts above market value $ 20,500 $ 20,500 Accumulated amortization (14,694 ) (14,471 ) Lease contracts above market value, net $ 5,806 $ 6,029 Lease contracts below market value $ 24,175 $ 24,175 Accumulated amortization (20,382 ) (20,043 ) Lease contracts below market value, net $ 3,793 $ 4,132 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, 2016 and December 31, 2015 , we had one uncollectible account that consisted of a note receivable from a customer in bankruptcy. The note balance as of March 31, 2016 and December 31, 2015 was $6.5 million , which is recorded within rents and other receivables, net in our accompanying consolidated balance sheets. As of March 31, 2016 and December 31, 2015 , we have established a reserve of $5.1 million , including interest applied to principal. The note receivable, net of reserves and interest applied to the principal, was $1.4 million as of March 31, 2016 and December 31, 2015 . In October 2015, a sale of our bankrupt customer's east coast business was consummated, and we continue to be reasonably assured that we will be able to collect the balance of the note receivable, net of reserve, as a claim in the bankruptcy. 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 leases and are recorded as deferred rent in the accompanying consolidated balance sheets. As of March 31, 2016 and December 31, 2015 , we had reserves against deferred rent of $0 and $0.1 million , respectively. 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, or 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, 2016 (dollars in thousands): OP Units Number Amount Balance at December 31, 2015 15,073,563 $ 479,189 Net income attributable to redeemable noncontrolling interests – operating partnership — 5,478 Distributions declared — (6,994 ) Redemption of operating partnership units (191,900 ) (6,101 ) Adjustments to redeemable noncontrolling interests – operating partnership — 131,582 Balance at March 31, 2016 14,881,663 $ 603,154 The following is a summary of activity for redeemable partnership units for the three months ended March 31, 2016 (dollars in thousands): OP Units Number Amount Balance at December 31, 2015 15,073,563 $ 479,189 Redemption of operating partnership units (191,900 ) (6,101 ) Adjustments to redeemable partnership units — 130,066 Balance at March 31, 2016 14,881,663 $ 603,154 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, 2016 and 2015 (dollars in thousands): Three months ended March 31, 2016 2015 Net income attributable to controlling interests $ 31,219 $ 22,614 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 (125,481 ) 6,476 $ (94,262 ) $ 29,090 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 periodically award stock-based compensation to employees and members of our Board of Directors in the form of common stock, restricted common stock, options and performance units. For each common 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 May 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standard Update No. 2014-09 - Revenue from Contracts with Customers (Topic 606). 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 2018, and although the standard does not apply to leases, we are assessing the impact on our financial position and results of operations. In August 2014, the FASB issued Accounting Standards Update No. 2014-15 - Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. Under this new guidance, management will be required to perform a going concern evaluation similar to the auditor's evaluation required by standards issued by the Public Company Accounting Oversight Board and the American Institute of Certified Public Accountants. This evaluation will be required for both annual and interim reporting periods. We will be required to apply the new standard in the first quarter of 2017 and do not believe that the new standard will have a material effect on our financial position or results of operations. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 - Leases (Topic 842). We will be required to apply the new standard in the first quarter of 2019, and although the standard does not fundamentally change the lessor accounting model, we are assessing the potential impact on our financial position and results of operations. Recently Adopted Accounting Pronouncements In February 2015, the FASB issued Accounting Standards Update No. 2015-02 - Consolidation: Amendments to the Consolidation Analysis, which amends the criteria for determining variable interest entities (“VIEs”), amends the criteria for determining if a service provider possesses a variable interest in a VIE, and eliminates the presumption that a general partner should consolidate a limited partnership. The guidance is effective in the first quarter of 2016. We have adopted this standard as of January 1, 2016, and there was no material effect on our financial position or results of operations. In March 2016, the FASB issued Accounting Standards Update No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The new guidance affects two areas of our accounting. First, the guidance will increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer's statutory income tax withholding obligation. An employer will be allowed to withhold shares up to the amount of tax potentially owed using the maximum statutory tax rate in each jurisdiction. Furthermore, companies will now have the ability to make a policy election to account for forfeitures as they occur versus recording a forfeiture estimate. Early adoption is permitted, and we have early-adopted this standard as of January 1, 2016. We are electing to account for forfeitures as they occur versus recording a forfeiture estimate. Per the guidance, we will use a modified retrospective transition method of adoption, with a cumulative effect adjustment to accumulated deficit on our consolidated balance sheet as December 31, 2015 totaling less than $0.1 million (see below). Change in Accounting Principle As required by the new share-based payment accounting guidance issued in March 2016, described above, we have made a cumulative-effect adjustment to accumulated deficit to eliminate the forfeiture estimate recorded as of December 31, 2015, with a corresponding adjustment to additional paid in capital. The following table presents the prior period amounts that have been impacted by the new guidance and retrospectively adjusted on the consolidated balance sheet as of December 31, 2015 for DFT: As of December 31, 2015 As Previously Reported Impact of Change in Accounting Principle As Adjusted and Currently Reported Additional paid in capital $ 684,968 74 $ 685,042 Accumulated deficit (79,871 ) (74 ) (79,945 ) Because the consolidated balance sheet for the Operating Partnership includes capital accounts for the general partner and the limited partners, which each include a combination of partner capital and retained earnings (accumulated deficit), there is no adjustment required for the consolidated balance sheet for the Operating Partnership as of December 31, 2015.

3. Real Estate Assets

3. Real Estate Assets	3 Months Ended
	Mar. 31, 2016
Real Estate [Abstract]
Real Estate Disclosure [Text Block]	Real Estate Assets The following is a summary of our properties as of March 31, 2016 (dollars in thousands): Property Location Land Buildings and Improvements Construction in Progress and Land Held for Development Total Cost ACC2 Ashburn, VA $ 2,500 $ 154,217 $ 156,717 ACC3 Ashburn, VA 1,071 95,977 97,048 ACC4 Ashburn, VA 6,600 538,652 545,252 ACC5 Ashburn, VA 6,443 299,016 305,459 ACC6 Ashburn, VA 5,518 216,697 222,215 ACC7 Phases I-II Ashburn, VA 4,876 172,002 176,878 VA3 Reston, VA 9,000 179,385 188,385 VA4 Bristow, VA 6,800 149,499 156,299 CH1 Elk Grove Village, IL 23,611 358,739 382,350 CH2 Phase I Elk Grove Village, IL 3,998 71,932 75,930 NJ1 Phase I Piscataway, NJ 3,584 73,221 76,805 SC1 Phases I-II Santa Clara, CA 20,202 432,557 452,759 94,203 2,741,894 — 2,836,097 Construction in progress and land held for development (1 ) 372,438 372,438 $ 94,203 $ 2,741,894 $ 372,438 $ 3,208,535 (1) Properties located in Ashburn, VA (ACC7 Phases III-IV, ACC8, ACC9, ACC10, and ACC11); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2 Phases II-III and CH3) and Santa Clara, CA (SC1 Phase III, formerly referred to as SC2). In the fourth quarter of 2015, we determined that it was more likely than not that we would sell our NJ1 data center prior to the end of its previously estimated useful life. We believe that it is unlikely that we will develop NJ1 Phase II prior to the sale. In February 2016, we acquired two parcels of undeveloped land in Ashburn, Virginia from entities controlled by our Chairman of the Board and our former CEO. One parcel is a 35.4 acre site that we purchased for $15.6 million , which we are using for the current development of our ACC9 data center facility and the future development of a data center to be known as ACC10. The managers of the entity that sold us this site are a limited liability company owned solely by our Chairman of the Board, which also owns approximately 7% of the seller, and a limited liability company owned solely by our former CEO, which also owns approximately 1% of the seller. The other parcel is an 8.6 acre site that we purchased for $4.6 million . This parcel is being held for the future development of either a powered base shell or build-to-suit data center to be known as ACC11. O ur Chairman of the Board and our former CEO are the managers of the limited liability company that manages the entity that sold us this site. Our Chairman of the Board directly and indirectly owns approximately 23% of the seller, and our former CEO 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. In March 2016, we entered into an agreement to acquire a 46.7 acre parcel of land in Hillsboro, Oregon for a purchase price of $11.2 million . We expect to complete the acquisition in the third quarter of 2016. Upon completion of the acquisition, we expect to hold this parcel of land for future development in connection with our expansion plans. In April 2016, w e placed CH2 Phase II into service.

4. Debt

4. Debt	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Debt Debt Summary as of March 31, 2016 and December 31, 2015 ($ in thousands) March 31, 2016 December 31, 2015 Amounts (1) % of Total Rates Maturities (years) Amounts Secured $ 115,000 9 % 2.0 % 2.0 $ 115,000 Unsecured 1,100,000 91 % 4.9 % 5.4 1,100,000 Total $ 1,215,000 100 % 4.6 % 5.1 $ 1,215,000 Fixed Rate Debt: Unsecured Notes due 2021 $ 600,000 49 % 5.9 % 5.5 $ 600,000 Unsecured Notes due 2023 (2) 250,000 21 % 5.6 % 7.2 250,000 Fixed Rate Debt $ 850,000 70 % 5.8 % 6.0 $ 850,000 Floating Rate Debt: Unsecured Credit Facility — — % — % 2.1 — Unsecured Term Loan 250,000 21 % 1.9 % 3.3 250,000 ACC3 Term Loan 115,000 9 % 2.0 % 2.0 115,000 Floating Rate Debt 365,000 30 % 2.0 % 2.9 365,000 Total $ 1,215,000 100 % 4.6 % 5.1 $ 1,215,000 (1) Principal amounts exclude deferred financing costs. (2) Principal amount excludes original issue discount of $1.8 million . Outstanding Indebtedness Unsecured Credit Facility Our Unsecured Credit Facility is an unsecured revolving credit facility with a total commitment of $700 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% 1.80 % 0.80 % 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 % 0.00 % Level 2 Greater than or equal to BBB+ by S&P or Baa1 by Moody’s 0.925 % 0.00 % 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 1.30 % 0.30 % Level 5 Less than BBB- by S&P or Baa3 by Moody’s 1.70 % 0.70 % 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 below. 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, 2016 , a letter of credit of less than $0.1 million was outstanding under the facility. As of March 31, 2016 , there were no borrowings 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, 2016 . 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, 2016 . 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% 1.50 % 0.50 % Level 2 Greater than 35% but less than or equal to 40% 1.60 % 0.60 % 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% 1.90 % 0.90 % Level 5 Greater than 52.5% 2.10 % 1.10 % 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 % 0.00 % Level 2 Greater than or equal to BBB+ by S&P or Baa1 by Moody’s 0.875 % 0.00 % Level 3 Greater than or equal to BBB by S&P or Baa2 by Moody’s 1.00 % 0.00 % 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. 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, 2016 . Unsecured Notes due 2021 On September 24, 2013 , the Operating Partnership completed the sale of $600 million of 5.875% senior unsecured notes due 2021, which we refer to as 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 (collectively, the “Subsidiary Guarantors”), but excluding the subsidiaries that own the ACC3, ACC7, ACC9 and CH2 data center facilities, the ACC8, ACC10, ACC11 and CH3 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 100.000 % 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, 2016 . Unsecured Notes due 2023 On June 9, 2015 , the Operating Partnership completed the sale of $250 million of 5.625% senior unsecured notes due 2023, which we refer to as the Unsecured Notes due 2023. The Unsecured Notes due 2023 were issued at 99.205% of par and mature on June 15, 2023 . We will pay interest on the Unsecured Notes due 2023 semi-annually, in arrears, on June 15th and December 15th of each year. The Unsecured Notes due 2023 are unconditionally guaranteed, jointly and severally on a senior unsecured basis by DFT and the same Subsidiary Guarantors as those that guaranty the Unsecured Notes due 2021. The ranking of the Unsecured Notes due 2023 and the guarantees of these notes are the same as the ranking of the Unsecured Notes due 2021 and the guarantee of those notes. At any time prior to June 15, 2018, the Operating Partnership may redeem the Unsecured Notes due 2023, in whole or in part, at a price equal to the sum of (i) 100% of the principal amount of the Unsecured Notes due 2023 to be redeemed, plus (ii) a make-whole premium and accrued and unpaid interest. The Unsecured Notes due 2023 may be redeemed at the Operating Partnership's option, in whole or in part, at any time, on and after June 15, 2018 at the following redemption prices (expressed as percentages of the principal amount thereof) if redeemed during the 12-month period commencing June 15 of the years indicated below, in each case together with accrued and unpaid interest to the date of redemption: Year Redemption Price 2018 104.219 % 2019 102.813 % 2020 101.406 % 2021 and thereafter 100.000 % If there is a change of control (as defined in the indenture governing the Unsecured Notes due 2023) of the Operating Partnership or DFT, we must offer to purchase the Unsecured Notes due 2023 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 2023 at 100% of the principal amount thereof, plus accrued and unpaid interest. The Unsecured Notes due 2023 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 2023 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 2023 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 2023 or the trustee may declare the Unsecured Notes due 2023 due and immediately payable. We were in compliance with all covenants under the Unsecured Notes due 2023 as of March 31, 2016 . A summary of our debt repayment schedule as of March 31, 2016 is as follows: Debt Maturity as of March 31, 2016 ($ in thousands) Year Fixed Rate (1) Floating Rate (1) Total (1) % of Total Rates 2016 $ — $ 3,750 (4) $ 3,750 0.3 % 2.0 % 2017 — 8,750 (4) 8,750 0.7 % 2.0 % 2018 — 102,500 (4) 102,500 8.4 % 2.0 % 2019 — 250,000 (5) 250,000 20.6 % 1.9 % 2020 — — — — % — % 2021 600,000 (2) — 600,000 49.4 % 5.9 % 2022 — — — — % — % 2023 250,000 (3) — 250,000 20.6 % 5.6 % Total $ 850,000 $ 365,000 $ 1,215,000 100.0 % 4.6 % (1) Principal amounts exclude deferred financing costs. (2) The 5.875% Unsecured Notes due 2021 mature on September 15, 2021 . (3) The 5.625% Unsecured Notes due 2023 mature on June 15, 2023 . Principal amount excludes original issue discount of $1.8 million as of March 31, 2016 . (4) 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. (5) 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, 2016
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 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 ACC7 Phases III-IV, CH2 Phases II-III, ACC9 Phase I, and SC1 Phase III data centers were in place as of March 31, 2016 . 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, 2016 , the control estimates were as follows for our projects under development: • ACC7 Phase III: $66.6 million , of which $58.5 million has been incurred, and an additional $2.9 million has been committed under this contract. • ACC7 Phase IV: $37.1 million , of which $7.7 million has been incurred, and an additional $10.4 million has been committed under this contract. • CH2 Phase II: $17.8 million , of which $14.6 million has been incurred, and an additional $0.1 million has been committed under this contract. • CH2 Phase III: $66.6 million , of which $42.8 million has been incurred, and an additional $8.4 million has been committed under this contract. • ACC9 Phase I: $165.2 million , of which $0.5 million has been incurred, and an additional $0.5 million has been committed under this contract. • SC1 Phase III: $149.0 million , of which $1.9 million has been incurred, and an additional $6.1 million has been committed under this contract. 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 our 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, 2016 without triggering the tax protection provisions is approximately 90% of the initial built in gain of $667 million (unaudited), or $600 million (unaudited). This percentage increases each year by 10% , accumulating to 100% in 2017. As of March 31, 2016 , none of the tax protection provisions have been triggered and no liability has been recorded on our consolidated balance sheet. If, as of January 1, 2016, the tax protection provisions were triggered, we would not be liable for protection on the taxes related to the 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, 2016
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, 2016 and December 31, 2015 was $603.2 million and $479.2 million , respectively, based on the closing share price of DFT’s common stock of $40.53 and $31.79 , 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, 2016 , OP unitholders redeemed a total of 191,900 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, 2016
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, or 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 2016 , DFT declared and paid the following cash dividend on its Series A Preferred Stock, of which the OP paid an equivalent distribution on its preferred units: • $0.4921875 per share payable to stockholders of record as of April 1, 2016 . This dividend was paid on April 15, 2016 . 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, or 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 2016 , DFT declared and paid the following cash dividend on its Series B Preferred Stock, of which the OP paid an equivalent distribution on its preferred units: • $0.4765625 per share payable to stockholders of record as of April 1, 2016 . This dividend was paid on April 15, 2016 .

8. Stockholders Equity of the R

8. Stockholders Equity of the REIT and Partners Capital of the OP	3 Months Ended
	Mar. 31, 2016
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 March 2016, DFT completed a secondary underwritten public offering of 7,613,000 shares of common stock, at a public offering price of $37.75 per share. The total shares sold included 993,000 shares of common stock pursuant to the full exercise of the underwriters’ option to purchase additional shares of common stock. Net proceeds from the offering were approximately $275.4 million , after deducting the underwriting discount and other estimated offering expenses, which DFT contributed to the Operating Partnership in exchange for OP units. In 2016 , DFT has declared and paid the following cash dividend per share on its common stock, of which the OP paid an equivalent distribution on OP units: • $0.47 per share payable to stockholders of record as of April 1, 2016 . This dividend was paid on April 15, 2016 .

9. Equity Compensation Plan

9. Equity Compensation Plan	3 Months Ended
	Mar. 31, 2016
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, or 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, 2016 , 3,872,206 share equivalents were issued under the 2011 Plan, and the maximum aggregate amount of share equivalents remaining available for future issuance was 2,427,794 . 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 Restricted Stock Weighted Average Fair Value at Date of Grant Unvested balance at December 31, 2015 349,142 $ 28.02 Granted 136,395 31.21 Vested (131,024 ) 26.01 Forfeited (6,726 ) 29.72 Unvested balance at March 31, 2016 347,787 $ 29.99 During the three months ended March 31, 2016 , we issued 136,395 shares of restricted stock, which had an aggregate value of $4.3 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, 2016 , 131,024 shares of restricted stock vested at a value of $4.7 million on the respective vesting dates. As of March 31, 2016 , total unearned compensation on restricted stock was $9.0 million , and the weighted average vesting period was 1.5 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, 2016 , no options were granted to employees. The last grant of stock options occurred in 2013, and all stock option grants have fully vested. A summary of our stock option activity for the three months ended March 31, 2016 is presented in the tables below. Number of Options Weighted Average Exercise Price Under option, December 31, 2015 1,230,212 $ 18.28 Granted — — Exercised (410,404 ) 22.50 Forfeited — — Under option, March 31, 2016 819,808 $ 16.16 Shares Subject to Option Total Unearned Compensation Weighted Average Remaining Contractual Term As of March 31, 2016 819,808 $ — 4.4 years The following table sets forth the number of unvested options as of March 31, 2016 and the weighted average fair value of these options at the grant date. Number of Options Weighted Average Fair Value at Date of Grant Unvested balance at December 31, 2015 38,771 $ 4.75 Granted — — Vested (38,771 ) 4.75 Forfeited — — Unvested balance at March 31, 2016 — $ — The following tables sets forth the number of exercisable options as of March 31, 2016 and the weighted average fair value and exercise price of these options at the grant date. Number of Options Weighted Average Fair Value at Date of Grant Options Exercisable at December 31, 2015 1,191,441 $ 5.41 Vested 38,771 4.75 Exercised (410,404 ) 6.48 Options Exercisable at March 31, 2016 819,808 $ 4.85 Exercisable Options Intrinsic Value Weighted Average Exercise Price Weighted Average Remaining Contractual Term As of March 31, 2016 819,808 $ 20.0 million $ 16.16 4.4 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 approximately 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, 2015 and 2016, 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, 2016 . Assumption Number of performance units granted 112,951 Expected volatility 24 % Expected annual dividend 5.98 % Risk-free rate 1.32 % Performance unit fair value at date of grant $ 38.08 Total grant fair value at date of grant $4.3 million Maximum value of grant on vesting date based on closing price of DFT's stock at the date of grant $10.7 million During the three months ended March 31, 2016 , no performance units were forfeited. As of March 31, 2016 , total unearned compensation on outstanding performance units was $5.5 million . For the performance units granted in 2013, based on DFT’s total stockholder return compared to the MSCI US REIT index return for the period from January 1, 2013 to January 1, 2016, 32,985 common shares were issued upon the vesting of these performance units on March 1, 2016, which equated to a 300% payout. 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 1, 2015. In connection with the departure of our former CEO in February 2015, 320,676 common shares were issued in connection with the accelerated vesting of certain of his unvested performance units. $1.9 million was expensed during the first quarter of 2015 related to the accelerated vesting of these performance units.

10. Earnings Per Share of the R

10. Earnings Per Share of the REIT	3 Months Ended
	Mar. 31, 2016
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 and net income attributable to common shares 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, 2016 2015 Basic and Diluted Shares Outstanding Weighted average common shares – basic 66,992,995 65,506,028 Effect of dilutive securities 853,120 950,243 Weighted average common shares – diluted 67,846,115 66,456,271 Calculation of Earnings per Share – Basic Net income attributable to common shares $ 24,408 $ 15,803 Net income allocated to unvested restricted shares (163 ) (147 ) Net income attributable to common shares, adjusted 24,245 15,656 Weighted average common shares – basic 66,992,995 65,506,028 Earnings per common share – basic $ 0.36 $ 0.24 Calculation of Earnings per Share – Diluted Net income attributable to common shares $ 24,245 $ 15,656 Weighted average common shares – diluted 67,846,115 66,456,271 Earnings per common share – diluted $ 0.36 $ 0.24 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, 2016 2015 Stock Options — — Performance Units 0.1 —

11. Earnings Per Unit of the Op

11. Earnings Per Unit of the Operating Partnership	3 Months Ended
	Mar. 31, 2016
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 and net income attributable to common units used in the computation of earnings per unit (in thousands except for unit and per unit amounts): Three months ended March 31, 2016 2015 Basic and Diluted Units Outstanding Weighted average common units – basic (includes redeemable partnership units and units of general and limited partners) 82,028,440 80,926,265 Effect of dilutive securities 853,120 950,243 Weighted average common units – diluted 82,881,560 81,876,508 Calculation of Earnings per Unit – Basic Net income attributable to common units $ 29,886 $ 19,522 Net income allocated to unvested restricted units (163 ) (147 ) Net income attributable to common units, adjusted 29,723 19,375 Weighted average common units – basic 82,028,440 80,926,265 Earnings per common unit – basic $ 0.36 $ 0.24 Calculation of Earnings per Unit – Diluted Net income attributable to common units $ 29,723 $ 19,375 Weighted average common units – diluted 82,881,560 81,876,508 Earnings per common unit – diluted $ 0.36 $ 0.24 The following table sets forth the amount 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, 2016 2015 Stock Options — — Performance Units 0.1 —

12. Fair Value

12. Fair Value	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Fair Value Assets and Liabilities Measured at Fair Value The authoritative guidance issued by the FASB 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, 2016 : • 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 Notes due 2023, Unsecured Term Loan, Unsecured Credit Facility and ACC3 Term Loan was $1,213.7 million with a fair value of $1,243.8 million based on Level 2 and Level 3 data. The Unsecured Notes due 2021 and Unsecured Notes due 2023 were valued based on Level 2 data which consisted of a quoted price from Bloomberg. The ACC3 Loan and the Unsecured Term Loan were valued based on Level 3 data which consisted of a one-month LIBOR swap rate coterminous with the maturity of each loan plus a spread 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, 2016
Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes [Abstract]
Additional Financial Information Disclosure [Text Block]	Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes Our Unsecured Notes due 2021 and Unsecured Notes due 2023 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 (collectively, the "Subsidiary Guarantors"), but excluding the subsidiaries that own the ACC3, ACC7, ACC9 and CH2 data center facilities, the ACC8, ACC10, ACC11 and CH3 land and the TRS (collectively, the "Subsidiary Non-Guarantors"). The following consolidating financial information sets forth the financial position as of March 31, 2016 and December 31, 2015 and the results of operations and cash flows for the three months ended March 31, 2016 and 2015 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, 2016 Operating Partnership Subsidiary Guarantors Subsidiary Non-Guarantors Eliminations Consolidated Total ASSETS Income producing property: Land $ — $ 84,258 $ 9,945 $ — $ 94,203 Buildings and improvements — 2,399,654 342,240 — 2,741,894 — 2,483,912 352,185 — 2,836,097 Less: accumulated depreciation — (543,622 ) (41,716 ) — (585,338 ) Net income producing property — 1,940,290 310,469 — 2,250,759 Construction in progress and land held for development — 27,033 345,405 — 372,438 Net real estate — 1,967,323 655,874 — 2,623,197 Cash and cash equivalents 232,298 — 6,020 — 238,318 Rents and other receivables 1,391 7,262 1,032 — 9,685 Deferred rent — 122,903 7,775 — 130,678 Lease contracts above market value, net — 5,806 — — 5,806 Deferred costs, net 2,889 14,310 6,819 — 24,018 Investment in affiliates 2,605,307 — — (2,605,307 ) — Prepaid expenses and other assets 2,273 41,082 1,960 — 45,315 Total assets $ 2,844,158 $ 2,158,686 $ 679,480 $ (2,605,307 ) $ 3,077,017 LIABILITIES AND PARTNERS’ CAPITAL Liabilities: Line of credit $ — $ — $ — $ — $ — Mortgage notes payable — — 114,183 — 114,183 Unsecured term loan 249,236 — — — 249,236 Unsecured notes payable 835,552 — — — 835,552 Accounts payable and accrued liabilities 1,297 21,624 5,173 — 28,094 Construction costs payable 196 652 20,399 — 21,247 Accrued interest payable 6,506 — 6 — 6,512 Distribution payable 47,724 — — — 47,724 Lease contracts below market value, net — 3,793 — — 3,793 Prepaid rents and other liabilities 8 60,967 6,062 — 67,037 Total liabilities 1,140,519 87,036 145,823 — 1,373,378 Redeemable partnership units 603,154 — — — 603,154 Commitments and contingencies — — — — — Limited Partners’ Capital: Series A cumulative redeemable perpetual preferred units, 7,400,000 issued and outstanding at March 31, 2016 185,000 — — — 185,000 Series B cumulative redeemable perpetual preferred units, 6,650,000 issued and outstanding at March 31, 2016 166,250 — — — 166,250 Common units, 73,759,447 issued and outstanding at March 31, 2016 742,567 2,071,650 533,657 (2,605,307 ) 742,567 General partner’s capital, 662,373 common units issued and outstanding at March 31, 2016 6,668 — — — 6,668 Total partners’ capital 1,100,485 2,071,650 533,657 (2,605,307 ) 1,100,485 Total liabilities & partners’ capital $ 2,844,158 $ 2,158,686 $ 679,480 $ (2,605,307 ) $ 3,077,017 DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONSOLIDATING BALANCE SHEETS (in thousands except share data) December 31, 2015 Operating Partnership Subsidiary Guarantors Subsidiary Non-Guarantors Eliminations Consolidated Total ASSETS Income producing property: Land $ — $ 84,258 $ 9,945 $ — $ 94,203 Buildings and improvements — 2,399,016 337,920 — 2,736,936 — 2,483,274 347,865 — 2,831,139 Less: accumulated depreciation — (522,096 ) (38,741 ) — (560,837 ) Net income producing property — 1,961,178 309,124 — 2,270,302 Construction in progress and land held for development — 25,545 275,394 — 300,939 Net real estate — 1,986,723 584,518 — 2,571,241 Cash and cash equivalents 21,697 — 5,318 — 27,015 Rents and other receivables 1,391 7,563 634 — 9,588 Deferred rent — 122,830 6,111 — 128,941 Lease contracts above market value, net — 6,029 — — 6,029 Deferred costs, net 3,236 14,250 6,288 — 23,774 Investment in affiliates 2,546,465 — — (2,546,465 ) — Prepaid expenses and other assets 3,025 39,642 2,022 — 44,689 Total assets $ 2,575,814 $ 2,177,037 $ 604,891 $ (2,546,465 ) $ 2,811,277 LIABILITIES AND PARTNERS’ CAPITAL Liabilities: Line of credit $ — $ — $ — $ — $ — Mortgage notes payable — — 114,075 — 114,075 Unsecured term loan 249,172 — — — 249,172 Unsecured notes payable 834,963 — — — 834,963 Accounts payable and accrued liabilities 4,516 23,615 4,170 — 32,301 Construction costs payable 43 293 21,707 — 22,043 Accrued interest payable 11,815 — 6 — 11,821 Distribution payable 43,906 — — — 43,906 Lease contracts below market value, net — 4,132 — — 4,132 Prepaid rents and other liabilities 12 62,630 4,835 — 67,477 Total liabilities 1,144,427 90,670 144,793 — 1,379,890 Redeemable partnership units 479,189 — — — 479,189 Commitments and contingencies — — — — — Limited Partners’ Capital: Series A cumulative redeemable perpetual preferred units, 7,400,000 issued and outstanding at December 31, 2015 185,000 — — — 185,000 Series B cumulative redeemable perpetual preferred units, 6,650,000 issued and outstanding at December 31, 2015 166,250 — — — 166,250 Common units, 65,443,277 issued and outstanding at December 31, 2015 594,927 2,086,367 460,098 (2,546,465 ) 594,927 General partner’s capital, 662,373 common units issued and outstanding at December 31, 2015 6,021 — — — 6,021 Total partners’ capital 952,198 2,086,367 460,098 (2,546,465 ) 952,198 Total liabilities & partners’ capital $ 2,575,814 $ 2,177,037 $ 604,891 $ (2,546,465 ) $ 2,811,277 DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONSOLIDATING STATEMENTS OF OPERATIONS (in thousands) Three months ended March 31, 2016 Operating Subsidiary Subsidiary Eliminations Consolidated Revenues: Base rent $ 4,402 $ 69,366 $ 13,204 $ (4,439 ) $ 82,533 Recoveries from tenants — 34,375 4,319 — 38,694 Other revenues — 464 2,482 (24 ) 2,922 Total revenues 4,402 104,205 20,005 (4,463 ) 124,149 Expenses: Property operating costs — 35,605 4,776 (4,426 ) 35,955 Real estate taxes and insurance — 4,696 620 — 5,316 Depreciation and amortization 15 22,486 3,342 — 25,843 General and administrative 5,433 9 133 — 5,575 Other expenses 106 139 2,141 (37 ) 2,349 Total expenses 5,554 62,935 11,012 (4,463 ) 75,038 Operating (loss) income (1,152 ) 41,270 8,993 — 49,111 Interest: Expense incurred (14,174 ) — 2,605 — (11,569 ) Amortization of deferred financing costs (953 ) — 108 — (845 ) Equity in earnings 52,976 — — (52,976 ) — Net income (loss) 36,697 41,270 11,706 (52,976 ) 36,697 Preferred unit distributions (6,811 ) — — — (6,811 ) Net income (loss) attributable to common units $ 29,886 $ 41,270 $ 11,706 $ (52,976 ) $ 29,886 DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONSOLIDATING STATEMENTS OF OPERATIONS (in thousands) Three months ended March 31, 2015 Operating Subsidiary Subsidiary Eliminations Consolidated 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: Expense incurred (10,603 ) 981 1,375 — (8,247 ) Amortization of deferred financing costs (765 ) 81 42 — (642 ) Equity in earnings 43,010 — — (43,010 ) — Net income (loss) 26,333 39,501 3,509 (43,010 ) 26,333 Preferred unit distributions (6,811 ) — — — (6,811 ) Net income (loss) attributable to common units $ 19,522 $ 39,501 $ 3,509 $ (43,010 ) $ 19,522 DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (in thousands) Three months ended March 31, 2016 Operating Partnership Subsidiary Guarantors Subsidiary Non-Guarantors Eliminations Consolidated Total Cash flow from operating activities Net cash (used in) provided by operating activities $ (17,791 ) $ 52,007 $ 17,123 $ — $ 51,339 Cash flow from investing activities Investments in real estate – development — (1,197 ) (51,105 ) — (52,302 ) Land acquisition costs – related party — — (20,168 ) — (20,168 ) Investments in affiliates (9,419 ) (48,627 ) 58,046 — — Interest capitalized for real estate under development (2 ) — (3,181 ) — (3,183 ) Improvements to real estate — (2,099 ) — — (2,099 ) Additions to non-real estate property (26 ) (84 ) (13 ) — (123 ) Net cash used in investing activities (9,447 ) (52,007 ) (16,421 ) — (77,875 ) Cash flow from financing activities Line of credit: Proceeds 60,000 — — — 60,000 Repayments (60,000 ) — — — (60,000 ) Issuance of common units, net of offering costs 275,797 — — — 275,797 Equity compensation proceeds 7,007 — — — 7,007 Distributions (44,965 ) — — — (44,965 ) Net cash provided by financing activities 237,839 — — — 237,839 Net increase in cash and cash equivalents 210,601 — 702 — 211,303 Cash and cash equivalents, beginning 21,697 — 5,318 — 27,015 Cash and cash equivalents, ending $ 232,298 $ — $ 6,020 $ — $ 238,318 DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (in thousands) Three months ended March 31, 2015 Operating Partnership Subsidiary Guarantors Subsidiary Non-Guarantors Eliminations Consolidated 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 (7,489 ) — — — (7,489 ) Stock 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

14. Subsequent Events (Notes)

14. Subsequent Events (Notes)	3 Months Ended
	Mar. 31, 2016
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events In April 2016, DFT announced that it intends to redeem 3,400,000 of its 7,400,000 shares of 7.875% Series A Preferred Stock on May 27, 2016 . The shares of Series A Preferred Stock will be redeemed at a redemption price of $25 , plus an amount equal to all accrued and unpaid dividends on each share.

2. Significant Accounting Pol22

2. Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
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, 2016 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, through its wholly-owned subsidiaries, 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, 2016 was 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, 2016 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, 2015 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 $24.7 million and $23.9 million for the three months ended March 31, 2016 and 2015 , respectively. Repairs and maintenance costs are expensed as incurred. We review each of our properties for indicators of impairment. Examples of such indicators may include a significant decrease in the market price of the property, a significant adverse change in the extent or manner in which the property is being used in its physical condition, a significant adverse change in legal factors or in the business climate that could affect the value of a property, including an adverse action or assessment by a regulator, an accumulation of costs significantly in excess of the amount originally expected for the development of a property, a history of operating or cash flow losses of the property or a current expectation that, more likely than not, a property will be sold or otherwise disposed of significantly before the end of its previously estimated useful life. When such impairment indicators exist, we review an estimate of the future undiscounted net cash flows expected to result from the real estate investment’s use and eventual disposition and compare that estimate to the carrying value of the property. We assess the recoverability of the carrying value of our assets on a property-by-property basis. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition, potential sales proceeds and other factors. If our undiscounted cash flow evaluation indicates that we are unable to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property. No impairment losses were recorded during the three months ended March 31, 2016 and 2015 . We classify a data center property as held-for-sale when it meets the necessary criteria, which include when we commit to and actively embark on a plan to sell the asset, the sale is expected to be completed within one year under terms usual and customary for such sales, and actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Data center properties held-for-sale are carried at the lower of cost or fair value less costs to sell. We are marketing our NJ1 data center for sale. Because we have never sold a data center facility since becoming a public company in 2007 and therefore have no history of selling data center assets, we are not reasonably assured that the sale of NJ1 will occur within one year. Accordingly, as of March 31, 2016 and December 31, 2015 , we did not classify our NJ1 data center as held-for-sale.
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. Balances of financing costs for our unsecured revolving credit facility, or Unsecured Credit Facility, net of accumulated amortization, which are presented within deferred costs, net in our accompanying consolidated balance sheets at March 31, 2016 and December 31, 2015 were as follows (in thousands): Financing costs presented within deferred costs, net March 31, December 31, Financing costs $ 8,200 $ 8,198 Accumulated amortization (5,319 ) (4,969 ) Financing costs, net $ 2,881 $ 3,229 Balances of financing costs for our other recognized debt liabilities, net of accumulated amortization, which are presented as a reduction of each of the respective recognized debt liabilities in our accompanying consolidated balance sheets at March 31, 2016 and December 31, 2015 were as follows (in thousands): Financing costs presented as a reduction of debt liability balances March 31, December 31, Financing costs $ 20,531 $ 20,531 Accumulated amortization (6,328 ) (5,618 ) Financing costs, net $ 14,203 $ 14,913 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. In June 2015, we wrote off $0.7 million of unamortized leasing costs to amortization expense related to a customer in bankruptcy whose leases with us were rejected effective July 1, 2015 pursuant to an order made by the bankruptcy court. Leasing costs incurred for the three months ended March 31, 2016 and 2015 were as follows (in thousands): Three months ended March 31, 2016 2015 Leasing costs incurred for new leases $ 1,600 $ 373 Leasing costs incurred for renewals 11 1,101 Total leasing costs incurred $ 1,611 $ 1,474 Amortization of deferred leasing costs totaled $1.0 million and $1.1 million for the three months ended March 31, 2016 and 2015 , respectively. Balances, net of accumulated amortization, at March 31, 2016 and December 31, 2015 were as follows (in thousands): March 31, December 31, Leasing costs $ 52,114 $ 50,503 Accumulated amortization (30,977 ) (29,958 ) Leasing costs, net $ 21,137 $ 20,545
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, 2016 and December 31, 2015 , the fuel inventory was $4.5 million 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 lease, 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. Straight-line rents receivable are included in deferred rent, net in the accompanying consolidated balance sheets. Lease inducements, which include cash payments to customers, are amortized as a reduction of rental income over the non-cancellable lease term. Lease inducements are included in prepaid expenses and other assets 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 straight-line rents receivable, lease inducements and lease intangibles associated with that lease will be written off to rental revenue. Balances, net of accumulated amortization, at March 31, 2016 and December 31, 2015 were as follows (in thousands): March 31, December 31, Lease contracts above market value $ 20,500 $ 20,500 Accumulated amortization (14,694 ) (14,471 ) Lease contracts above market value, net $ 5,806 $ 6,029 Lease contracts below market value $ 24,175 $ 24,175 Accumulated amortization (20,382 ) (20,043 ) Lease contracts below market value, net $ 3,793 $ 4,132 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, 2016 and December 31, 2015 , we had one uncollectible account that consisted of a note receivable from a customer in bankruptcy. The note balance as of March 31, 2016 and December 31, 2015 was $6.5 million , which is recorded within rents and other receivables, net in our accompanying consolidated balance sheets. As of March 31, 2016 and December 31, 2015 , we have established a reserve of $5.1 million , including interest applied to principal. The note receivable, net of reserves and interest applied to the principal, was $1.4 million as of March 31, 2016 and December 31, 2015 . In October 2015, a sale of our bankrupt customer's east coast business was consummated, and we continue to be reasonably assured that we will be able to collect the balance of the note receivable, net of reserve, as a claim in the bankruptcy. 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 leases and are recorded as deferred rent in the accompanying consolidated balance sheets. As of March 31, 2016 and December 31, 2015 , we had reserves against deferred rent of $0 and $0.1 million , respectively. 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, or 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, 2016 (dollars in thousands): OP Units Number Amount Balance at December 31, 2015 15,073,563 $ 479,189 Net income attributable to redeemable noncontrolling interests – operating partnership — 5,478 Distributions declared — (6,994 ) Redemption of operating partnership units (191,900 ) (6,101 ) Adjustments to redeemable noncontrolling interests – operating partnership — 131,582 Balance at March 31, 2016 14,881,663 $ 603,154 The following is a summary of activity for redeemable partnership units for the three months ended March 31, 2016 (dollars in thousands): OP Units Number Amount Balance at December 31, 2015 15,073,563 $ 479,189 Redemption of operating partnership units (191,900 ) (6,101 ) Adjustments to redeemable partnership units — 130,066 Balance at March 31, 2016 14,881,663 $ 603,154 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, 2016 and 2015 (dollars in thousands): Three months ended March 31, 2016 2015 Net income attributable to controlling interests $ 31,219 $ 22,614 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 (125,481 ) 6,476 $ (94,262 ) $ 29,090
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 using the two class method.
Stock-based Compensation [Policy Text Block]	Stock-based Compensation We periodically award stock-based compensation to employees and members of our Board of Directors in the form of common stock, restricted common stock, options and performance units. For each common 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, Policy [Policy Text Block]	Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standard Update No. 2014-09 - Revenue from Contracts with Customers (Topic 606). 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 2018, and although the standard does not apply to leases, we are assessing the impact on our financial position and results of operations. In August 2014, the FASB issued Accounting Standards Update No. 2014-15 - Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. Under this new guidance, management will be required to perform a going concern evaluation similar to the auditor's evaluation required by standards issued by the Public Company Accounting Oversight Board and the American Institute of Certified Public Accountants. This evaluation will be required for both annual and interim reporting periods. We will be required to apply the new standard in the first quarter of 2017 and do not believe that the new standard will have a material effect on our financial position or results of operations. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 - Leases (Topic 842). We will be required to apply the new standard in the first quarter of 2019, and although the standard does not fundamentally change the lessor accounting model, we are assessing the potential impact on our financial position and results of operations. Recently Adopted Accounting Pronouncements In February 2015, the FASB issued Accounting Standards Update No. 2015-02 - Consolidation: Amendments to the Consolidation Analysis, which amends the criteria for determining variable interest entities (“VIEs”), amends the criteria for determining if a service provider possesses a variable interest in a VIE, and eliminates the presumption that a general partner should consolidate a limited partnership. The guidance is effective in the first quarter of 2016. We have adopted this standard as of January 1, 2016, and there was no material effect on our financial position or results of operations. In March 2016, the FASB issued Accounting Standards Update No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The new guidance affects two areas of our accounting. First, the guidance will increase the amount an employer can withhold to cover income taxes on awards and still qualify for the exception to liability classification for shares used to satisfy the employer's statutory income tax withholding obligation. An employer will be allowed to withhold shares up to the amount of tax potentially owed using the maximum statutory tax rate in each jurisdiction. Furthermore, companies will now have the ability to make a policy election to account for forfeitures as they occur versus recording a forfeiture estimate. Early adoption is permitted, and we have early-adopted this standard as of January 1, 2016. We are electing to account for forfeitures as they occur versus recording a forfeiture estimate. Per the guidance, we will use a modified retrospective transition method of adoption, with a cumulative effect adjustment to accumulated deficit on our consolidated balance sheet as December 31, 2015 totaling less than $0.1 million (see below). Change in Accounting Principle As required by the new share-based payment accounting guidance issued in March 2016, described above, we have made a cumulative-effect adjustment to accumulated deficit to eliminate the forfeiture estimate recorded as of December 31, 2015, with a corresponding adjustment to additional paid in capital. The following table presents the prior period amounts that have been impacted by the new guidance and retrospectively adjusted on the consolidated balance sheet as of December 31, 2015 for DFT: As of December 31, 2015 As Previously Reported Impact of Change in Accounting Principle As Adjusted and Currently Reported Additional paid in capital $ 684,968 74 $ 685,042 Accumulated deficit (79,871 ) (74 ) (79,945 ) Because the consolidated balance sheet for the Operating Partnership includes capital accounts for the general partner and the limited partners, which each include a combination of partner capital and retained earnings (accumulated deficit), there is no adjustment required for the consolidated balance sheet for the Operating Partnership as of December 31, 2015.

2. Significant Accounting Pol23

2. Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Schedule of Deferred Financing Costs [Table Text Block]	Balances of financing costs for our unsecured revolving credit facility, or Unsecured Credit Facility, net of accumulated amortization, which are presented within deferred costs, net in our accompanying consolidated balance sheets at March 31, 2016 and December 31, 2015 were as follows (in thousands): Financing costs presented within deferred costs, net March 31, December 31, Financing costs $ 8,200 $ 8,198 Accumulated amortization (5,319 ) (4,969 ) Financing costs, net $ 2,881 $ 3,229 Balances of financing costs for our other recognized debt liabilities, net of accumulated amortization, which are presented as a reduction of each of the respective recognized debt liabilities in our accompanying consolidated balance sheets at March 31, 2016 and December 31, 2015 were as follows (in thousands): Financing costs presented as a reduction of debt liability balances March 31, December 31, Financing costs $ 20,531 $ 20,531 Accumulated amortization (6,328 ) (5,618 ) Financing costs, net $ 14,203 $ 14,913
Schedule of Leasing Costs Incurred [Table Text Block]	Leasing costs incurred for the three months ended March 31, 2016 and 2015 were as follows (in thousands): Three months ended March 31, 2016 2015 Leasing costs incurred for new leases $ 1,600 $ 373 Leasing costs incurred for renewals 11 1,101 Total leasing costs incurred $ 1,611 $ 1,474
Schedule of Deferred Leasing Costs [Table Text Block]	Balances, net of accumulated amortization, at March 31, 2016 and December 31, 2015 were as follows (in thousands): March 31, December 31, Leasing costs $ 52,114 $ 50,503 Accumulated amortization (30,977 ) (29,958 ) Leasing costs, net $ 21,137 $ 20,545
Schedule of Lease Intangibles Above and Below Market Value [Table Text Block]	Balances, net of accumulated amortization, at March 31, 2016 and December 31, 2015 were as follows (in thousands): March 31, December 31, Lease contracts above market value $ 20,500 $ 20,500 Accumulated amortization (14,694 ) (14,471 ) Lease contracts above market value, net $ 5,806 $ 6,029 Lease contracts below market value $ 24,175 $ 24,175 Accumulated amortization (20,382 ) (20,043 ) Lease contracts below market value, net $ 3,793 $ 4,132
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, 2016 (dollars in thousands): OP Units Number Amount Balance at December 31, 2015 15,073,563 $ 479,189 Net income attributable to redeemable noncontrolling interests – operating partnership — 5,478 Distributions declared — (6,994 ) Redemption of operating partnership units (191,900 ) (6,101 ) Adjustments to redeemable noncontrolling interests – operating partnership — 131,582 Balance at March 31, 2016 14,881,663 $ 603,154
Redeemable Partnership Units [Table Text Block]	The following is a summary of activity for redeemable partnership units for the three months ended March 31, 2016 (dollars in thousands): OP Units Number Amount Balance at December 31, 2015 15,073,563 $ 479,189 Redemption of operating partnership units (191,900 ) (6,101 ) Adjustments to redeemable partnership units — 130,066 Balance at March 31, 2016 14,881,663 $ 603,154
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, 2016 and 2015 (dollars in thousands): Three months ended March 31, 2016 2015 Net income attributable to controlling interests $ 31,219 $ 22,614 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 (125,481 ) 6,476 $ (94,262 ) $ 29,090
New Accounting Pronouncement, Early Adoption [Table Text Block]	The following table presents the prior period amounts that have been impacted by the new guidance and retrospectively adjusted on the consolidated balance sheet as of December 31, 2015 for DFT: As of December 31, 2015 As Previously Reported Impact of Change in Accounting Principle As Adjusted and Currently Reported Additional paid in capital $ 684,968 74 $ 685,042 Accumulated deficit (79,871 ) (74 ) (79,945 )

3. Real Estate Assets (Tables)

3. Real Estate Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Real Estate [Abstract]
Schedule of Real Estate Properties [Table Text Block]	The following is a summary of our properties as of March 31, 2016 (dollars in thousands): Property Location Land Buildings and Improvements Construction in Progress and Land Held for Development Total Cost ACC2 Ashburn, VA $ 2,500 $ 154,217 $ 156,717 ACC3 Ashburn, VA 1,071 95,977 97,048 ACC4 Ashburn, VA 6,600 538,652 545,252 ACC5 Ashburn, VA 6,443 299,016 305,459 ACC6 Ashburn, VA 5,518 216,697 222,215 ACC7 Phases I-II Ashburn, VA 4,876 172,002 176,878 VA3 Reston, VA 9,000 179,385 188,385 VA4 Bristow, VA 6,800 149,499 156,299 CH1 Elk Grove Village, IL 23,611 358,739 382,350 CH2 Phase I Elk Grove Village, IL 3,998 71,932 75,930 NJ1 Phase I Piscataway, NJ 3,584 73,221 76,805 SC1 Phases I-II Santa Clara, CA 20,202 432,557 452,759 94,203 2,741,894 — 2,836,097 Construction in progress and land held for development (1 ) 372,438 372,438 $ 94,203 $ 2,741,894 $ 372,438 $ 3,208,535 (1) Properties located in Ashburn, VA (ACC7 Phases III-IV, ACC8, ACC9, ACC10, and ACC11); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2 Phases II-III and CH3) and Santa Clara, CA (SC1 Phase III, formerly referred to as SC2).

4. Debt (Tables)

4. Debt (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Instrument [Line Items]
Schedule of Debt [Table Text Block]	Debt Summary as of March 31, 2016 and December 31, 2015 ($ in thousands) March 31, 2016 December 31, 2015 Amounts (1) % of Total Rates Maturities (years) Amounts Secured $ 115,000 9 % 2.0 % 2.0 $ 115,000 Unsecured 1,100,000 91 % 4.9 % 5.4 1,100,000 Total $ 1,215,000 100 % 4.6 % 5.1 $ 1,215,000 Fixed Rate Debt: Unsecured Notes due 2021 $ 600,000 49 % 5.9 % 5.5 $ 600,000 Unsecured Notes due 2023 (2) 250,000 21 % 5.6 % 7.2 250,000 Fixed Rate Debt $ 850,000 70 % 5.8 % 6.0 $ 850,000 Floating Rate Debt: Unsecured Credit Facility — — % — % 2.1 — Unsecured Term Loan 250,000 21 % 1.9 % 3.3 250,000 ACC3 Term Loan 115,000 9 % 2.0 % 2.0 115,000 Floating Rate Debt 365,000 30 % 2.0 % 2.9 365,000 Total $ 1,215,000 100 % 4.6 % 5.1 $ 1,215,000 (1) Principal amounts exclude deferred financing costs. (2) Principal amount excludes original issue discount of $1.8 million
Schedule of Maturities of Long-term Debt [Table Text Block]	A summary of our debt repayment schedule as of March 31, 2016 is as follows: Debt Maturity as of March 31, 2016 ($ in thousands) Year Fixed Rate (1) Floating Rate (1) Total (1) % of Total Rates 2016 $ — $ 3,750 (4) $ 3,750 0.3 % 2.0 % 2017 — 8,750 (4) 8,750 0.7 % 2.0 % 2018 — 102,500 (4) 102,500 8.4 % 2.0 % 2019 — 250,000 (5) 250,000 20.6 % 1.9 % 2020 — — — — % — % 2021 600,000 (2) — 600,000 49.4 % 5.9 % 2022 — — — — % — % 2023 250,000 (3) — 250,000 20.6 % 5.6 % Total $ 850,000 $ 365,000 $ 1,215,000 100.0 % 4.6 % (1) Principal amounts exclude deferred financing costs. (2) The 5.875% Unsecured Notes due 2021 mature on September 15, 2021 . (3) The 5.625% Unsecured Notes due 2023 mature on June 15, 2023 . Principal amount excludes original issue discount of $1.8 million as of March 31, 2016 . (4) 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. (5) 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]	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% 1.50 % 0.50 % Level 2 Greater than 35% but less than or equal to 40% 1.60 % 0.60 % 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% 1.90 % 0.90 % Level 5 Greater than 52.5% 2.10 % 1.10 %
Schedule Of Credit Rating For Unsecured Term Loan [Table Text Block]	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 % 0.00 % Level 2 Greater than or equal to BBB+ by S&P or Baa1 by Moody’s 0.875 % 0.00 % Level 3 Greater than or equal to BBB by S&P or Baa2 by Moody’s 1.00 % 0.00 % 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]
Debt Instrument Redemption [Table Text Block]	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 100.000 %
Unsecured Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument Redemption [Table Text Block]	The Unsecured Notes due 2023 may be redeemed at the Operating Partnership's option, in whole or in part, at any time, on and after June 15, 2018 at the following redemption prices (expressed as percentages of the principal amount thereof) if redeemed during the 12-month period commencing June 15 of the years indicated below, in each case together with accrued and unpaid interest to the date of redemption: Year Redemption Price 2018 104.219 % 2019 102.813 % 2020 101.406 % 2021 and thereafter 100.000 %
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Schedule Of Line of Credit Interest Rate Margin Applicable By Indebtedness Level [Table Text Block]	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% 1.80 % 0.80 % 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]	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 % 0.00 % Level 2 Greater than or equal to BBB+ by S&P or Baa1 by Moody’s 0.925 % 0.00 % 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 1.30 % 0.30 % Level 5 Less than BBB- by S&P or Baa3 by Moody’s 1.70 % 0.70 %

9. Equity Compensation Plan (Ta

9. Equity Compensation Plan (Tables)	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]	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 Restricted Stock Weighted Average Fair Value at Date of Grant Unvested balance at December 31, 2015 349,142 $ 28.02 Granted 136,395 31.21 Vested (131,024 ) 26.01 Forfeited (6,726 ) 29.72 Unvested balance at March 31, 2016 347,787 $ 29.99
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	A summary of our stock option activity for the three months ended March 31, 2016 is presented in the tables below. Number of Options Weighted Average Exercise Price Under option, December 31, 2015 1,230,212 $ 18.28 Granted — — Exercised (410,404 ) 22.50 Forfeited — — Under option, March 31, 2016 819,808 $ 16.16 Shares Subject to Option Total Unearned Compensation Weighted Average Remaining Contractual Term As of March 31, 2016 819,808 $ — 4.4 years
Schedule of Stock Options Roll Forward [Table Text Block]	The following table sets forth the number of unvested options as of March 31, 2016 and the weighted average fair value of these options at the grant date. Number of Options Weighted Average Fair Value at Date of Grant Unvested balance at December 31, 2015 38,771 $ 4.75 Granted — — Vested (38,771 ) 4.75 Forfeited — — Unvested balance at March 31, 2016 — $ —
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, 2016 and the weighted average fair value and exercise price of these options at the grant date. Number of Options Weighted Average Fair Value at Date of Grant Options Exercisable at December 31, 2015 1,191,441 $ 5.41 Vested 38,771 4.75 Exercised (410,404 ) 6.48 Options Exercisable at March 31, 2016 819,808 $ 4.85 Exercisable Options Intrinsic Value Weighted Average Exercise Price Weighted Average Remaining Contractual Term As of March 31, 2016 819,808 $ 20.0 million $ 16.16 4.4 years
Schedule of Share-based Payment Award, Performance Units, Valuation Assumptions [Table Text Block]	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, 2016 . Assumption Number of performance units granted 112,951 Expected volatility 24 % Expected annual dividend 5.98 % Risk-free rate 1.32 % Performance unit fair value at date of grant $ 38.08 Total grant fair value at date of grant $4.3 million Maximum value of grant on vesting date based on closing price of DFT's stock at the date of grant $10.7 million

10. Earnings Per Share of the27

10. Earnings Per Share of the REIT (Tables)	3 Months Ended
	Mar. 31, 2016
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 and net income attributable to common shares 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, 2016 2015 Basic and Diluted Shares Outstanding Weighted average common shares – basic 66,992,995 65,506,028 Effect of dilutive securities 853,120 950,243 Weighted average common shares – diluted 67,846,115 66,456,271 Calculation of Earnings per Share – Basic Net income attributable to common shares $ 24,408 $ 15,803 Net income allocated to unvested restricted shares (163 ) (147 ) Net income attributable to common shares, adjusted 24,245 15,656 Weighted average common shares – basic 66,992,995 65,506,028 Earnings per common share – basic $ 0.36 $ 0.24 Calculation of Earnings per Share – Diluted Net income attributable to common shares $ 24,245 $ 15,656 Weighted average common shares – diluted 67,846,115 66,456,271 Earnings per common share – diluted $ 0.36 $ 0.24
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, 2016 2015 Stock Options — — Performance Units 0.1 —

11. Earnings Per Unit of the 28

11. Earnings Per Unit of the Operating Partnership (Tables)	3 Months Ended
	Mar. 31, 2016
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 and net income attributable to common shares 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, 2016 2015 Basic and Diluted Shares Outstanding Weighted average common shares – basic 66,992,995 65,506,028 Effect of dilutive securities 853,120 950,243 Weighted average common shares – diluted 67,846,115 66,456,271 Calculation of Earnings per Share – Basic Net income attributable to common shares $ 24,408 $ 15,803 Net income allocated to unvested restricted shares (163 ) (147 ) Net income attributable to common shares, adjusted 24,245 15,656 Weighted average common shares – basic 66,992,995 65,506,028 Earnings per common share – basic $ 0.36 $ 0.24 Calculation of Earnings per Share – Diluted Net income attributable to common shares $ 24,245 $ 15,656 Weighted average common shares – diluted 67,846,115 66,456,271 Earnings per common share – diluted $ 0.36 $ 0.24
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, 2016 2015 Stock Options — — Performance Units 0.1 —
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 and net income attributable to common units used in the computation of earnings per unit (in thousands except for unit and per unit amounts): Three months ended March 31, 2016 2015 Basic and Diluted Units Outstanding Weighted average common units – basic (includes redeemable partnership units and units of general and limited partners) 82,028,440 80,926,265 Effect of dilutive securities 853,120 950,243 Weighted average common units – diluted 82,881,560 81,876,508 Calculation of Earnings per Unit – Basic Net income attributable to common units $ 29,886 $ 19,522 Net income allocated to unvested restricted units (163 ) (147 ) Net income attributable to common units, adjusted 29,723 19,375 Weighted average common units – basic 82,028,440 80,926,265 Earnings per common unit – basic $ 0.36 $ 0.24 Calculation of Earnings per Unit – Diluted Net income attributable to common units $ 29,723 $ 19,375 Weighted average common units – diluted 82,881,560 81,876,508 Earnings per common unit – diluted $ 0.36 $ 0.24
Schedule of exclusions from diluted earnings per share/unit [Table Text Block]	Three months ended March 31, 2016 2015 Stock Options — — Performance Units 0.1 —

13. Supplemental Consolidatin29

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes (Tables)	3 Months Ended
	Mar. 31, 2016
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, 2016 Operating Partnership Subsidiary Guarantors Subsidiary Non-Guarantors Eliminations Consolidated Total ASSETS Income producing property: Land $ — $ 84,258 $ 9,945 $ — $ 94,203 Buildings and improvements — 2,399,654 342,240 — 2,741,894 — 2,483,912 352,185 — 2,836,097 Less: accumulated depreciation — (543,622 ) (41,716 ) — (585,338 ) Net income producing property — 1,940,290 310,469 — 2,250,759 Construction in progress and land held for development — 27,033 345,405 — 372,438 Net real estate — 1,967,323 655,874 — 2,623,197 Cash and cash equivalents 232,298 — 6,020 — 238,318 Rents and other receivables 1,391 7,262 1,032 — 9,685 Deferred rent — 122,903 7,775 — 130,678 Lease contracts above market value, net — 5,806 — — 5,806 Deferred costs, net 2,889 14,310 6,819 — 24,018 Investment in affiliates 2,605,307 — — (2,605,307 ) — Prepaid expenses and other assets 2,273 41,082 1,960 — 45,315 Total assets $ 2,844,158 $ 2,158,686 $ 679,480 $ (2,605,307 ) $ 3,077,017 LIABILITIES AND PARTNERS’ CAPITAL Liabilities: Line of credit $ — $ — $ — $ — $ — Mortgage notes payable — — 114,183 — 114,183 Unsecured term loan 249,236 — — — 249,236 Unsecured notes payable 835,552 — — — 835,552 Accounts payable and accrued liabilities 1,297 21,624 5,173 — 28,094 Construction costs payable 196 652 20,399 — 21,247 Accrued interest payable 6,506 — 6 — 6,512 Distribution payable 47,724 — — — 47,724 Lease contracts below market value, net — 3,793 — — 3,793 Prepaid rents and other liabilities 8 60,967 6,062 — 67,037 Total liabilities 1,140,519 87,036 145,823 — 1,373,378 Redeemable partnership units 603,154 — — — 603,154 Commitments and contingencies — — — — — Limited Partners’ Capital: Series A cumulative redeemable perpetual preferred units, 7,400,000 issued and outstanding at March 31, 2016 185,000 — — — 185,000 Series B cumulative redeemable perpetual preferred units, 6,650,000 issued and outstanding at March 31, 2016 166,250 — — — 166,250 Common units, 73,759,447 issued and outstanding at March 31, 2016 742,567 2,071,650 533,657 (2,605,307 ) 742,567 General partner’s capital, 662,373 common units issued and outstanding at March 31, 2016 6,668 — — — 6,668 Total partners’ capital 1,100,485 2,071,650 533,657 (2,605,307 ) 1,100,485 Total liabilities & partners’ capital $ 2,844,158 $ 2,158,686 $ 679,480 $ (2,605,307 ) $ 3,077,017 DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONSOLIDATING BALANCE SHEETS (in thousands except share data) December 31, 2015 Operating Partnership Subsidiary Guarantors Subsidiary Non-Guarantors Eliminations Consolidated Total ASSETS Income producing property: Land $ — $ 84,258 $ 9,945 $ — $ 94,203 Buildings and improvements — 2,399,016 337,920 — 2,736,936 — 2,483,274 347,865 — 2,831,139 Less: accumulated depreciation — (522,096 ) (38,741 ) — (560,837 ) Net income producing property — 1,961,178 309,124 — 2,270,302 Construction in progress and land held for development — 25,545 275,394 — 300,939 Net real estate — 1,986,723 584,518 — 2,571,241 Cash and cash equivalents 21,697 — 5,318 — 27,015 Rents and other receivables 1,391 7,563 634 — 9,588 Deferred rent — 122,830 6,111 — 128,941 Lease contracts above market value, net — 6,029 — — 6,029 Deferred costs, net 3,236 14,250 6,288 — 23,774 Investment in affiliates 2,546,465 — — (2,546,465 ) — Prepaid expenses and other assets 3,025 39,642 2,022 — 44,689 Total assets $ 2,575,814 $ 2,177,037 $ 604,891 $ (2,546,465 ) $ 2,811,277 LIABILITIES AND PARTNERS’ CAPITAL Liabilities: Line of credit $ — $ — $ — $ — $ — Mortgage notes payable — — 114,075 — 114,075 Unsecured term loan 249,172 — — — 249,172 Unsecured notes payable 834,963 — — — 834,963 Accounts payable and accrued liabilities 4,516 23,615 4,170 — 32,301 Construction costs payable 43 293 21,707 — 22,043 Accrued interest payable 11,815 — 6 — 11,821 Distribution payable 43,906 — — — 43,906 Lease contracts below market value, net — 4,132 — — 4,132 Prepaid rents and other liabilities 12 62,630 4,835 — 67,477 Total liabilities 1,144,427 90,670 144,793 — 1,379,890 Redeemable partnership units 479,189 — — — 479,189 Commitments and contingencies — — — — — Limited Partners’ Capital: Series A cumulative redeemable perpetual preferred units, 7,400,000 issued and outstanding at December 31, 2015 185,000 — — — 185,000 Series B cumulative redeemable perpetual preferred units, 6,650,000 issued and outstanding at December 31, 2015 166,250 — — — 166,250 Common units, 65,443,277 issued and outstanding at December 31, 2015 594,927 2,086,367 460,098 (2,546,465 ) 594,927 General partner’s capital, 662,373 common units issued and outstanding at December 31, 2015 6,021 — — — 6,021 Total partners’ capital 952,198 2,086,367 460,098 (2,546,465 ) 952,198 Total liabilities & partners’ capital $ 2,575,814 $ 2,177,037 $ 604,891 $ (2,546,465 ) $ 2,811,277
Schedule of Supplemental Consolidating Statements of Operations [Table Text Block]	DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONSOLIDATING STATEMENTS OF OPERATIONS (in thousands) Three months ended March 31, 2016 Operating Subsidiary Subsidiary Eliminations Consolidated Revenues: Base rent $ 4,402 $ 69,366 $ 13,204 $ (4,439 ) $ 82,533 Recoveries from tenants — 34,375 4,319 — 38,694 Other revenues — 464 2,482 (24 ) 2,922 Total revenues 4,402 104,205 20,005 (4,463 ) 124,149 Expenses: Property operating costs — 35,605 4,776 (4,426 ) 35,955 Real estate taxes and insurance — 4,696 620 — 5,316 Depreciation and amortization 15 22,486 3,342 — 25,843 General and administrative 5,433 9 133 — 5,575 Other expenses 106 139 2,141 (37 ) 2,349 Total expenses 5,554 62,935 11,012 (4,463 ) 75,038 Operating (loss) income (1,152 ) 41,270 8,993 — 49,111 Interest: Expense incurred (14,174 ) — 2,605 — (11,569 ) Amortization of deferred financing costs (953 ) — 108 — (845 ) Equity in earnings 52,976 — — (52,976 ) — Net income (loss) 36,697 41,270 11,706 (52,976 ) 36,697 Preferred unit distributions (6,811 ) — — — (6,811 ) Net income (loss) attributable to common units $ 29,886 $ 41,270 $ 11,706 $ (52,976 ) $ 29,886 DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONSOLIDATING STATEMENTS OF OPERATIONS (in thousands) Three months ended March 31, 2015 Operating Subsidiary Subsidiary Eliminations Consolidated 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: Expense incurred (10,603 ) 981 1,375 — (8,247 ) Amortization of deferred financing costs (765 ) 81 42 — (642 ) Equity in earnings 43,010 — — (43,010 ) — Net income (loss) 26,333 39,501 3,509 (43,010 ) 26,333 Preferred unit distributions (6,811 ) — — — (6,811 ) Net income (loss) attributable to common units $ 19,522 $ 39,501 $ 3,509 $ (43,010 ) $ 19,522
Schedule of Supplemental Consolidating Statements Of Cash Flows [Table Text Block]	DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (in thousands) Three months ended March 31, 2016 Operating Partnership Subsidiary Guarantors Subsidiary Non-Guarantors Eliminations Consolidated Total Cash flow from operating activities Net cash (used in) provided by operating activities $ (17,791 ) $ 52,007 $ 17,123 $ — $ 51,339 Cash flow from investing activities Investments in real estate – development — (1,197 ) (51,105 ) — (52,302 ) Land acquisition costs – related party — — (20,168 ) — (20,168 ) Investments in affiliates (9,419 ) (48,627 ) 58,046 — — Interest capitalized for real estate under development (2 ) — (3,181 ) — (3,183 ) Improvements to real estate — (2,099 ) — — (2,099 ) Additions to non-real estate property (26 ) (84 ) (13 ) — (123 ) Net cash used in investing activities (9,447 ) (52,007 ) (16,421 ) — (77,875 ) Cash flow from financing activities Line of credit: Proceeds 60,000 — — — 60,000 Repayments (60,000 ) — — — (60,000 ) Issuance of common units, net of offering costs 275,797 — — — 275,797 Equity compensation proceeds 7,007 — — — 7,007 Distributions (44,965 ) — — — (44,965 ) Net cash provided by financing activities 237,839 — — — 237,839 Net increase in cash and cash equivalents 210,601 — 702 — 211,303 Cash and cash equivalents, beginning 21,697 — 5,318 — 27,015 Cash and cash equivalents, ending $ 232,298 $ — $ 6,020 $ — $ 238,318 DUPONT FABROS TECHNOLOGY, L.P. SUPPLEMENTAL CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (in thousands) Three months ended March 31, 2015 Operating Partnership Subsidiary Guarantors Subsidiary Non-Guarantors Eliminations Consolidated 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 (7,489 ) — — — (7,489 ) Stock 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

1. Description of Business (Det

1. Description of Business (Details)	3 Months Ended
	Mar. 31, 2016
Subsidiary or Equity Method Investee [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	83.30%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	0.90%

2. Significant Accounting Pol31

2. Significant Accounting Policies Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015
Significant Accounting Policies [Line Items]
Cash at Bank Held by Parent Company not Part of Operating Partnership	$ 4,200
Depreciation	24,700		$ 23,900
Asset impairment charges	0		0
Write off of Unamortized Leasing Costs		$ 700
Amortization of Deferred Leasing Fees	1,000		$ 1,100
Fuel Inventory	4,500			$ 4,500
Notes, Loans and Financing Receivable, Gross, Noncurrent	6,500			6,500
Account receivable reserve	5,100			5,100
Notes, Loans and Financing Receivable, Net, Noncurrent	1,400			1,400
Deferred Rent Reserve	0			100
Retained earnings (accumulated deficit)	$ 55,537			79,945
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
New Accounting Pronouncement, Early Adoption, Effect [Member]
Significant Accounting Policies [Line Items]
Retained earnings (accumulated deficit)				$ 74

2. Significant Accounting Pol32

2. Significant Accounting Policies Schedule of Deferred Financing Costs (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets [Member]
Significant Accounting Policies [Line Items]
Financing costs	$ 8,200	$ 8,198
Accumulated amortization	(5,319)	(4,969)
Financing costs, net	2,881	3,229
Liability [Member]
Significant Accounting Policies [Line Items]
Financing costs	20,531	20,531
Accumulated amortization	(6,328)	(5,618)
Financing costs, net	$ 14,203	$ 14,913

2. Significant Accounting Pol33

2. Significant Accounting Policies Schedule of Leasing Costs Incurred (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of Leasing Costs Incurred [Line Items]
Payments for Leasing Costs	$ 1,611	$ 1,474
New Lease [Member]
Schedule of Leasing Costs Incurred [Line Items]
Payments for Leasing Costs	1,600	373
Lease Renewal [Member]
Schedule of Leasing Costs Incurred [Line Items]
Payments for Leasing Costs	$ 11	$ 1,101

2. Significant Accounting Pol34

2. Significant Accounting Policies Schedule of Deferred Leasing Costs (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Leasing costs	$ 52,114	$ 50,503
Accumulated amortization	(30,977)	(29,958)
Leasing costs, net	$ 21,137	$ 20,545

2. Significant Accounting Pol35

2. Significant Accounting Policies Schedule of Above and Below Market Lease Intangibles (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Lease contracts above market value	$ 20,500	$ 20,500
Accumulated amortization	(14,694)	(14,471)
Lease contracts above market value, net	5,806	6,029
Lease contracts below market value	24,175	24,175
Accumulated Amortization	(20,382)	(20,043)
Lease contracts below market value, net	$ 3,793	$ 4,132

2. Significant Accounting Pol36

2. Significant Accounting Policies Schedule of Redeemable Noncontrolling Interests - Operating Partnership (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accounting Policies [Abstract]
Balance at December 31, 2015, units	15,073,563
Balance at December 31, 2015	$ 479,189
Net income attributable to redeemable noncontrolling interests – operating partnership	5,478	$ 3,719
Distributions declared	$ (6,994)
Redemption of operating partnership units, shares	(191,900)
Redemption of operating partnership units	$ (6,101)	(598)
Adjustments to redeemable noncontrolling interests – operating partnership	$ 131,582	$ (5,878)
Balance at March 31, 2016, units	14,881,663
Balance at March 31, 2016	$ 603,154

2. Significant Accounting Pol37

2. Significant Accounting Policies Schedule of Redeemable Partnership Units (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Significant Accounting Policies [Line Items]
Balance at December 31, 2015, units	15,073,563
Balance at December 31, 2015	$ 479,189
Redemption of operating partnership units, shares	(191,900)
Redemption of operating partnership units	$ (6,101)	$ (598)
Balance at March 31, 2016, units	14,881,663
Balance at March 31, 2016	$ 603,154
DuPont Fabros Technology, L.P. [Member]
Significant Accounting Policies [Line Items]
Balance at December 31, 2015, units	15,073,563
Balance at December 31, 2015	$ 479,189
Redemption of operating partnership units, shares	(191,900)
Redemption of operating partnership units	$ (6,101)	$ (598)
Adjustments to redeemable partnership units	$ 130,066
Balance at March 31, 2016, units	14,881,663
Balance at March 31, 2016	$ 603,154

2. Significant Accounting Pol38

2. Significant Accounting Policies Schedule of Net Income Attributable to Controlling Interests and Transfers to Redeemable Noncontrolling Interests – Operating Partnership (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accounting Policies [Abstract]
Net income attributable to controlling interests	$ 31,219	$ 22,614
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	(125,481)	6,476
Net Income Attributable to Controlling Interests and Transfers from Redeemable Noncontrolling Interests Operating Partnership	$ (94,262)	$ 29,090

2. Significant Accounting Pol39

2. Significant Accounting Policies Schedule of New Accounting Pronouncement, Early Adoption (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Additional paid in capital	$ 808,913	$ 685,042
Retained earnings (accumulated deficit)	$ (55,537)	(79,945)
Adjustments for New Accounting Principle, Early Adoption [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Additional paid in capital		684,968
Retained earnings (accumulated deficit)		(79,871)
New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Additional paid in capital		74
Retained earnings (accumulated deficit)		$ (74)

3. Real Estate Assets Schedule

3. Real Estate Assets Schedule of Real Estate Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)aRate		Dec. 31, 2015USD ($)
Real Estate Assets [Line Items]
Land	$ 94,203		$ 94,203
Buildings and improvements	2,741,894		2,736,936
Construction in progress and land held for development	372,438	[1]	300,939
Income producing property	2,836,097		$ 2,831,139
Real Estate, Gross	$ 3,208,535
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	83.30%
Land purchase agreement Hillsboro, Oregon - acres | a	46.7
Land purchase agreement Hillsboro, Oregon - purchase price	$ 11,200
ACC2 [Member]
Real Estate Assets [Line Items]
Land	2,500
Buildings and improvements	$ 154,217
Construction in progress and land held for development
Income producing property	$ 156,717
ACC3 [Member]
Real Estate Assets [Line Items]
Land	1,071
Buildings and improvements	$ 95,977
Construction in progress and land held for development
Income producing property	$ 97,048
ACC4 [Member]
Real Estate Assets [Line Items]
Land	6,600
Buildings and improvements	$ 538,652
Construction in progress and land held for development
Income producing property	$ 545,252
ACC5 [Member]
Real Estate Assets [Line Items]
Land	6,443
Buildings and improvements	$ 299,016
Construction in progress and land held for development
Income producing property	$ 305,459
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-II [Member]
Real Estate Assets [Line Items]
Land	4,876
Buildings and improvements	$ 172,002
Construction in progress and land held for development
Income producing property	$ 176,878
VA3 [Member]
Real Estate Assets [Line Items]
Land	9,000
Buildings and improvements	$ 179,385
Construction in progress and land held for development
Income producing property	$ 188,385
VA4 [Member]
Real Estate Assets [Line Items]
Land	6,800
Buildings and improvements	$ 149,499
Construction in progress and land held for development
Income producing property	$ 156,299
CH1 [Member]
Real Estate Assets [Line Items]
Land	23,611
Buildings and improvements	$ 358,739
Construction in progress and land held for development
Income producing property	$ 382,350
CH2 Phase I [Member]
Real Estate Assets [Line Items]
Land	3,998
Buildings and improvements	$ 71,932
Construction in progress and land held for development
Income producing property	$ 75,930
NJ1 Phase I [Member]
Real Estate Assets [Line Items]
Land	3,584
Buildings and improvements	$ 73,221
Construction in progress and land held for development
Income producing property	$ 76,805
SC1 [Member]
Real Estate Assets [Line Items]
Land	20,202
Buildings and improvements	$ 432,557
Construction in progress and land held for development
Income producing property	$ 452,759
ACC9 [Member]
Real Estate Assets [Line Items]
Area of Land | a	35.4
Land Available for Development	$ 15,600
ACC11 or Powered-base shell [Member]
Real Estate Assets [Line Items]
Area of Land | a	8.6
Land Available for Development	$ 4,600
Board of Directors Chairman [Member] | ACC9 [Member]
Real Estate Assets [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest | Rate	7.00%
Board of Directors Chairman [Member] | ACC11 or Powered-base shell [Member]
Real Estate Assets [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest | Rate	23.00%
Former CEO [Member] | ACC9 [Member]
Real Estate Assets [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest | Rate	1.00%
Former CEO [Member] | ACC11 or Powered-base shell [Member]
Real Estate Assets [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest | Rate	18.00%
[1]	(1)Properties located in Ashburn, VA (ACC7 Phases III-IV, ACC8, ACC9, ACC10, and ACC11); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2 Phases II-III and CH3) and Santa Clara, CA (SC1 Phase III, formerly referred to as SC2).

4. Debt Summary (Details)

4. Debt Summary (Details) $ in Thousands	Mar. 31, 2016USD ($)		Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Mortgage notes payable	$ 114,183		$ 114,075
Unsecured Term Loan	249,236		249,172
Long-term Debt, Gross	1,215,000		1,215,000
Unsecured notes payable	835,552		834,963
Line of credit	$ 0		0
Total Debt in Percentage	100.00%
Debt, Weighted Average Interest Rate	4.60%
Long Term Debt, Weighted Average Maturity in Years	5.1
Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount	$ 850,000		850,000
Percentage of Total Debt	70.00%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.80%
FixedInterestDebtMaturityInYears	6
Unsecured Notes due 2021 [Member]
Debt Instrument [Line Items]
Unsecured notes payable	$ 600,000		600,000
Percentage of Total Debt	49.00%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.875%
Unsecured Debt Maturity, in Years	5.5
Unsecured Notes due 2023 [Member]
Debt Instrument [Line Items]
Unsecured notes payable	$ 250,000	[1]	250,000
Percentage of Total Debt	21.00%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.60%
Unsecured Debt Maturity, in Years	7.2
Floating Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Amount	$ 365,000		365,000
Percentage of Total Debt	30.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	2.00%
VariableInterestDebtMaturityInYears	2.9
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit	$ 0		0
Percentage of Total Debt	0.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	0.00%
Unsecured Debt Maturity, in Years	2.1
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Unsecured Term Loan	$ 250,000		250,000
Percentage of Total Debt	21.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.90%
Unsecured Debt Maturity, in Years	3.3
AccThreeTermLoan [Member]
Debt Instrument [Line Items]
Term Loan	$ 115,000		115,000
Percentage of Total Debt	9.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	2.00%
Secured Debt Maturity, in Years	2
Secured Debt [Member]
Debt Instrument [Line Items]
Mortgage notes payable	$ 115,000		115,000
Percentage of Total Debt	9.00%
Long-Term Debt, Secured Interest Rate	2.00%
Secured Debt Maturity, in Years	2
Unsecured Debt [Member]
Debt Instrument [Line Items]
Unsecured Term Loan	$ 1,100,000		$ 1,100,000
Percentage of Total Debt	91.00%
Long-Term Debt, Unsecured Interest Rate	4.90%
Unsecured Debt Maturity, in Years	5.4
Unsecured Notes due 2023 [Member]
Debt Instrument [Line Items]
Unsecured notes payable	$ 250,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.625%
Debt Instrument, Unamortized Discount	$ (1,800)
[1]	(2) Principal amount excludes original issue discount of $1.8 million

4. Debt Unsecured Credit Facili

4. Debt Unsecured Credit Facility (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Line of credit	$ 0	$ 0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 700,000
Line of Credit Facility, Expiration Date	May 13, 2018
Extension Option On Debt Maturity Years	1
Basis Points Extension Fee On Total Commitment	15
Line of Credit Facility, Maximum Borrowing Capacity	$ 800,000
Facility amount available for Letters of Credit	35,000
Letters of Credit Outstanding, Amount	100
Line of credit	$ 0
Revolving 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%
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Income from Unencumbered Assets To Unsecured Debt	12.50%
Fixed Charge Coverage Ratio	1.70
Tangible Net Worth Amount	$ 1,300,000
Percentage Of Equity Offerings And Interests In Operating Partnerships To Be Added To Tangible Net Worth Threshold	80.00%

4. Debt Applicable Margin of Un

4. Debt Applicable Margin of Unsecured Credit Facility (Details) - Revolving Credit Facility [Member]	3 Months Ended
	Mar. 31, 2016
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%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.55%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.65%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 3 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.80%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 4 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.95%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 5 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.15%
Base Rate [Member] | Pricing Level 1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.55%
Base Rate [Member] | Pricing Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.65%
Base Rate [Member] | Pricing Level 3 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.80%
Base Rate [Member] | Pricing Level 4 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.95%
Base Rate [Member] | Pricing Level 5 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.15%

4. Debt Credit Rating for Unsec

4. Debt Credit Rating for Unsecured Credit Facility (Details) - Revolving Credit Facility [Member]	3 Months Ended
	Mar. 31, 2016
Maximum [Member]
Debt Instrument [Line Items]
Ratio of Total Indebtedness To Gross Assets Value	60.00%
London Interbank Offered Rate (LIBOR) [Member] | Moody's, A3 Rating [Member] | Credit Rating Level 1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.875%
London Interbank Offered Rate (LIBOR) [Member] | Moody's, Baa1 Rating [Member] | Credit Rating Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.925%
London Interbank Offered Rate (LIBOR) [Member] | Moody's, Baa2 Rating [Member] | Credit Rating Level 3 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.05%
London Interbank Offered Rate (LIBOR) [Member] | Moody's, Baa3 Rating [Member] | Credit Rating Level 4 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.30%
London Interbank Offered Rate (LIBOR) [Member] | Moody's, Baa3 Rating [Member] | Credit Rating Level 5 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.70%
Base Rate [Member] | Moody's, A3 Rating [Member] | Credit Rating Level 1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Base Rate [Member] | Moody's, Baa1 Rating [Member] | Credit Rating Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Base Rate [Member] | Moody's, Baa2 Rating [Member] | Credit Rating Level 3 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.05%
Base Rate [Member] | Moody's, Baa3 Rating [Member] | Credit Rating Level 4 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.30%
Base Rate [Member] | Moody's, Baa3 Rating [Member] | Credit Rating Level 5 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.70%

4. Debt ACC3 Term Loan (Details

4. Debt ACC3 Term Loan (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Mortgage notes payable	$ 114,183	$ 114,075
AccThreeTermLoan [Member]
Debt Instrument [Line Items]
Mortgage notes payable	$ 115,000
Debt Instrument, Maturity Date	Mar. 27, 2018
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	1.70
Tangible Net Worth Amount	$ 1,300,000
Percentage Of Equity Offerings And Interests In Operating Partnerships To Be Added To Tangible Net Worth Threshold	80.00%
Debt Service Coverage Ratio	1.50
AccThreeTermLoan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.55%
AccThreeTermLoan [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.55%

4. Debt Unsecured Term Loan (De

4. Debt Unsecured Term Loan (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Unsecured Term Loan	$ 249,236	$ 249,172
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Unsecured Term Loan	$ 250,000
Debt Instrument, Maturity Date	Jul. 21, 2019
Unsecured Term Loan [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 Term Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Income from Unencumbered Assets To Unsecured Debt	12.50%
Fixed Charge Coverage Ratio	1.70
Tangible Net Worth Amount	$ 1,300,000
Percentage Of Equity Offerings And Interests In Operating Partnerships To Be Added To Tangible Net Worth Threshold	80.00%

4. Debt Applicable Margin of 47

4. Debt Applicable Margin of Unsecured Term Loan (Details) - Unsecured Term Loan [Member]	3 Months Ended
	Mar. 31, 2016
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.60%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 3 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 4 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.90%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Level 5 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.10%
Base Rate [Member] | Pricing Level 1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Base Rate [Member] | Pricing Level 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.60%
Base Rate [Member] | Pricing Level 3 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.75%
Base Rate [Member] | Pricing Level 4 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.90%
Base Rate [Member] | Pricing Level 5 [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 Uns48

4. Debt Credit Rating for Unsecured Term Loan (Details) - Unsecured Term Loan [Member]	3 Months Ended
	Mar. 31, 2016
London Interbank Offered Rate (LIBOR) [Member] | Credit Rating Level 1 [Member] | Moody's, A3 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.825%
London Interbank Offered Rate (LIBOR) [Member] | Credit Rating Level 2 [Member] | Moody's, Baa1 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.875%
London Interbank Offered Rate (LIBOR) [Member] | Credit Rating Level 3 [Member] | Moody's, Baa2 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Credit Rating Level 4 [Member] | Moody's, Baa3 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%
London Interbank Offered Rate (LIBOR) [Member] | Credit Rating Level 5 [Member] | Moody's, Baa3 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.65%
Base Rate [Member] | Credit Rating Level 1 [Member] | Moody's, A3 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Base Rate [Member] | Credit Rating Level 2 [Member] | Moody's, Baa1 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Base Rate [Member] | Credit Rating Level 3 [Member] | Moody's, Baa2 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Base Rate [Member] | Credit Rating Level 4 [Member] | Moody's, Baa3 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.25%
Base Rate [Member] | Credit Rating Level 5 [Member] | Moody's, Baa3 Rating [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 ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Unsecured notes payable	$ 835,552	$ 834,963
Unsecured Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Sep. 24, 2013
Unsecured notes payable	$ 600,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.875%
Debt Instrument, Maturity Date	Sep. 15, 2021
Unencumbered Assets to Unsecured Debt	150.00%
Unsecured Notes due 2021 [Member] | Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
Unsecured Notes due 2021 [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	104.406%
Unsecured Notes due 2021 [Member] | Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	102.938%
Unsecured Notes due 2021 [Member] | Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	101.469%
Unsecured Notes due 2021 [Member] | Debt Instrument, Redemption, Period Five [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
Unsecured Notes due 2021 [Member] | Change in Control [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	101.00%
Unsecured Notes due 2021 [Member] | Asset Sales [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%

4. Debt Unsecured Notes due 250

4. Debt Unsecured Notes due 2023 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Unsecured notes payable	$ 835,552	$ 834,963
Unsecured Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Jun. 9, 2015
Unsecured notes payable	$ 250,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.625%
Issuance price per note	99.205%
Debt Instrument, Maturity Date	Jun. 15, 2023
Unencumbered Assets to Unsecured Debt	150.00%
Unsecured Notes due 2023 [Member] | Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
Unsecured Notes due 2023 [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	104.219%
Unsecured Notes due 2023 [Member] | Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	102.813%
Unsecured Notes due 2023 [Member] | Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	101.406%
Unsecured Notes due 2023 [Member] | Debt Instrument, Redemption, Period Five [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
Unsecured Notes due 2023 [Member] | Change in Control [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	101.00%
Unsecured Notes due 2023 [Member] | Asset Sales [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%

4. Debt Maturity Summary (Detai

4. Debt Maturity Summary (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term Debt, Gross		$ 1,215,000	$ 1,215,000
Total Debt in Percentage		100.00%
Debt, Weighted Average Interest Rate		4.60%
2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 3,750
Percentage of Total Debt		0.30%
Debt, Weighted Average Interest Rate		2.00%
2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 8,750
Percentage of Total Debt		0.70%
Debt, Weighted Average Interest Rate		2.00%
2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 102,500
Percentage of Total Debt		8.40%
Debt, Weighted Average Interest Rate		2.00%
2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 250,000
Percentage of Total Debt		20.60%
Debt, Weighted Average Interest Rate		1.90%
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		49.40%
Debt, Weighted Average Interest Rate		5.90%
2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 0
Percentage of Total Debt		0.00%
Debt, Weighted Average Interest Rate		0.00%
2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 250,000
Percentage of Total Debt		20.60%
Debt, Weighted Average Interest Rate		5.60%
Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Amount		$ 850,000	850,000
Percentage of Total Debt		70.00%
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	[1]	600,000
Fixed Rate Debt [Member] | 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		0
Fixed Rate Debt [Member] | 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	[2]	250,000
Floating Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Amount		$ 365,000	$ 365,000
Percentage of Total Debt		30.00%
Floating Rate Debt [Member] | 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	[3]	$ 3,750
Floating Rate Debt [Member] | 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	[3]	8,750
Floating Rate Debt [Member] | 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	[3]	102,500
Floating Rate Debt [Member] | 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	[4]	250,000
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
Floating Rate Debt [Member] | 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		0
Floating Rate Debt [Member] | 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 0
Unsecured Notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Sep. 15, 2021
Unsecured Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Jun. 15, 2023
Debt Instrument, Unamortized Discount		$ 1,800
AccThreeTermLoan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Mar. 27, 2018
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		Apr. 1, 2016
AccThreeTermLoan [Member] | BeginningAprilOneTwoThousandSeventeen [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal		$ 2,500
Debt Instrument, Date of Increased Required Payment		Apr. 1, 2017
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Jul. 21, 2019
[1]	The 5.875% Unsecured Notes due 2021 mature on September 15, 2021.
[2]	The 5.625% Unsecured Notes due 2023 mature on June 15, 2023. Principal amount excludes original issue discount of $1.8 million as of March 31, 2016.
[3]	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.
[4]	The Unsecured Term Loan matures on July 21, 2019 with no extension option.

5. Commitments and Contingenc52

5. Commitments and Contingencies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Long-term Purchase Commitment [Line Items]
Percentage Of Built In Gain That Can Be Recognized Without Triggering Tax Protection Provisions	90.00%
Initial Built In Gain	$ 667
Amount of Built In Gain That Can Be Recognized Without Triggering Tax Protection Provisions	$ 600
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, No Guarantee on Secured Loan	$ 97
Percentage of Disinterested Members of Board for Approving Sales Resulting in Payments to Executives or Directors	75.00%
ACC7 Phase III [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	$ 66.6
Amount of Control Estimate Incurred	58.5
Total Commitments For Purchase of Equipment And Labor Related to Development	2.9
ACC7 Phase IV [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	37.1
Amount of Control Estimate Incurred	7.7
Total Commitments For Purchase of Equipment And Labor Related to Development	10.4
CH2 Phase II [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	17.8
Amount of Control Estimate Incurred	14.6
Total Commitments For Purchase of Equipment And Labor Related to Development	0.1
CH2 Phase III [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	66.6
Amount of Control Estimate Incurred	42.8
Total Commitments For Purchase of Equipment And Labor Related to Development	8.4
ACC9 Phase I [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	165.2
Amount of Control Estimate Incurred	0.5
Total Commitments For Purchase of Equipment And Labor Related to Development	0.5
SC1 Phase III [Member]
Long-term Purchase Commitment [Line Items]
Estimated Control Cost	149
Amount of Control Estimate Incurred	1.9
Total Commitments For Purchase of Equipment And Labor Related to Development	$ 6.1

6. Redeemable noncontrolling 53

6. Redeemable noncontrolling interests operating partnership / Redeemable partnership units (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Redeemable noncontrolling interests – operating partnership / Redeemable partnership units [Line Items]
Redeemable noncontrolling interests - operating partnership	$ 603,154	$ 479,189
Share Price	$ 40.53	$ 31.79
Redemption of operating partnership units, shares	191,900

7. Preferred Stock (Details)

7. Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
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	7.875%
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	$ 0.4921875
Dividends Payable, Date of Record	Apr. 1, 2016
Dividends Payable, Date to be Paid	Apr. 15, 2016
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	7.625%
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	$ 0.4765625
Dividends Payable, Date of Record	Apr. 1, 2016
Dividends Payable, Date to be Paid	Apr. 15, 2016

8. Stockholders Equity of the55

8. Stockholders Equity of the REIT and Partners Capital of the OP (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Stock Issued During Period, Shares, New Issues	7,613,000
Shares Issued, Price Per Share	$ 37.75
Issuance of common stock, full exercise of underwriters' option	993,000
Stock Issued During Period, Value, New Issues	$ 275,401
Dividends declared per common share	$ 0.47	$ 0.42
Common Stock [Member]
Stockholders’ Equity of the REIT and Partners’ Capital of the OP [Line Items]
Dividends declared per common share	$ 0.47
Dividends Payable, Date of Record	Apr. 1, 2016
Dividends Payable, Date to be Paid	Apr. 15, 2016

9. Equity Compensation Plan Nar

9. Equity Compensation Plan Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)shares	Mar. 31, 2015USD ($)shares
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	3,872,206
Share Equivalents Remaining Available	2,427,794
Shares of restricted stock, Granted	136,395
Value of Restricted Stock Awarded during period | $	$ 4.3
Shares of restricted stock, Vested	131,024
Value of Restricted Stock on Vesting Date | $	$ 4.7
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options | $	$ 9
Weighted Average Vesting Period	1 year 183 days
Number of Options Granted	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(6,726)
Performance Shares [Member]
Equity Compensation Plan [Line Items]
Shares of restricted stock, Granted	112,951
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options | $	$ 5.5
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	32,985	0
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
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)	3 Months Ended
	Mar. 31, 2016$ / sharesshares
Equity Compensation Plan [Line Items]
Shares of restricted stock, Unvested balance at December 31, 2015 | shares	349,142
Shares of restricted stock, Granted | shares	136,395
Shares of restricted stock, Vested | shares	(131,024)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares	(6,726)
Weighted Average Grant Date Fair Value, Unvested balance at December 31, 2015 | $ / shares	$ 28.02
Weighted Average Grant Date Fair Value, Granted | $ / shares	31.21
Weighted Average Grant Date Fair Value, Vested | $ / shares	26.01
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	29.72
Weighted Average Grant Date Fair Value, Unvested balance at March 31, 2016 | $ / shares	$ 29.99
Restricted Stock [Member]
Equity Compensation Plan [Line Items]
Shares of restricted stock, Unvested balance at March 31, 2016 | shares	347,787

9. Equity Compensation Plan S58

9. Equity Compensation Plan Summary of Stock Options (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Equity Compensation Plan [Line Items]
Under option, December 31, 2015 | shares	1,230,212
Granted | shares	0
Exercised | shares	(410,404)
Forfeited | shares	0
Under option, March 31, 2016 | shares	819,808
Weighted Average Exercise Price, Under Option, December 31, 2015 | $ / shares	$ 18.28
Weighted Average Exercise Price, Granted | $ / shares	0
Weighted Average Exercise Price, Exercised | $ / shares	22.50
Weighted Average Exercise Price, Forfeited | $ / shares	0
Weighted Average Exercise Price, Under Option, March 31, 2016 | $ / shares	$ 16.16
Total Unearned Compensation | $	$ 0
Weighted Average Remaining Contractual Term	4 years 146 days

9. Equity Compensation Plan S59

9. Equity Compensation Plan Summary of Unvested Stock Options (Details)	3 Months Ended
	Mar. 31, 2016$ / sharesshares
Equity Compensation Plan [Line Items]
Unvested balance at December 31, 2015 | shares	38,771
Granted | shares	0
Vested | shares	(38,771)
Forfeited | shares	0
Unvested balance at March 31, 2016 | shares	0
Weighted Average Grant Date Fair Value, Unvested at December 31, 2015 | $ / shares	$ 4.75
Weighted Average Grant Date Fair Value, Granted | $ / shares	0
Weighted Average Grant Date Fair Value, Vested | $ / shares	4.75
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	0
Weighted Average Grant Date Fair Value, Unvested at March 31, 2016 | $ / shares	$ 0

9. Equity Compensation Plan S60

9. Equity Compensation Plan Summary of Exercisable Stock Options (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Equity Compensation Plan [Line Items]
Options Exercisable at December 31, 2015 | shares	1,191,441
Vested | shares	38,771
Exercised | shares	(410,404)
Options Exercisable at March 31, 2016 | shares	819,808
Weighted Average Grant Date Fair Value, Exercisable at December 31, 2015	$ 5.41
Weighted Average Grant Date Fair Value, Vested	4.75
Weighted Average Grant Date Fair Value, Exercised	6.48
Weighted Average Grant Date Fair Value, Exercisable at March 31, 2016	$ 4.85
Intrinsic Value | $	$ 20
Weighted Average Exercise Price	$ 16.16
Weighted Average Remaining Contractual Term	4 years 146 days

9. Equity Compensation Plan S61

9. Equity Compensation Plan Summary of Assumptions Used for Performance Units Granted (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Equity Compensation Plan [Line Items]
Performance Units Granted In Period | shares	136,395
Performance Shares [Member]
Equity Compensation Plan [Line Items]
Performance Units Granted In Period | shares	112,951
Expected volatility	24.00%
Expected annual dividend	5.98%
Risk-free rate	1.32%
Performance unit fair value at date of grant | $ / shares	$ 38.08
Total grant fair value at date of grant (millions) | $	$ 4.3
Maximum value of grant on vesting date based on closing price of the Company's stock at the date of grant | $	$ 10.7

10. Earnings Per Share of the62

10. Earnings Per Share of the REIT (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings per share of the REIT [Line Items]
Weighted average common shares – basic	66,992,995	65,506,028
Effect of dilutive securities	853,120	950,243
Weighted average common shares – diluted	67,846,115	66,456,271
Net income attributable to common shares	$ 24,408	$ 15,803
Net income allocated to unvested restricted shares	(163)	(147)
Net income attributable to common shares, adjusted	$ 24,245	$ 15,656
Earnings per common share – basic	$ 0.36	$ 0.24
Net Income (Loss) Available to Common Stockholders, Diluted	$ 24,245	$ 15,656
Earnings per common share – diluted	$ 0.36	$ 0.24
Equity Option [Member]
Earnings per share of the REIT [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0
Performance Shares [Member]
Earnings per share of the REIT [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	100,000	0

11. Earnings Per Unit of the 63

11. Earnings Per Unit of the Operating Partnership (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
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)	82,028,440	80,926,265
Effect of dilutive securities	853,120	950,243
Weighted average common units – diluted	82,881,560	81,876,508
Net income Loss attributable to common units, basic	$ 29,886	$ 19,522
Net income allocated to unvested restricted shares	(163)	(147)
Net income attributable to common units, adjusted	$ 29,723	$ 19,375
Earnings per unit, basic	$ 0.36	$ 0.24
Earnings per unit, diluted	$ 0.36	$ 0.24
DuPont Fabros Technology, L.P. [Member]
Earnings per unit of the Operating Partnership [Line Items]
Net income Loss attributable to common units, basic	$ 29,886	$ 19,522
Earnings per unit, basic	$ 0.36	$ 0.24
Earnings per unit, diluted	$ 0.36	$ 0.24
Equity Option [Member]
Earnings per unit of the Operating Partnership [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0
Performance Shares [Member]
Earnings per unit of the Operating Partnership [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	100,000	0

12. Fair Value (Details)

12. Fair Value (Details) $ in Millions	Mar. 31, 2016USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 1,213.7
Long-term Debt, Fair Value	$ 1,243.8

13. Supplemental Consolidatin65

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes Supplemental Consolidating Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2016		Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	$ 94,203		$ 94,203
Buildings and improvements	2,741,894		2,736,936
Income producing property	2,836,097		2,831,139
Less: accumulated depreciation	(585,338)		(560,837)
Net income producing property	2,250,759		2,270,302
Construction in progress and land held for development	372,438	[1]	300,939
Net real estate	2,623,197		2,571,241
Cash and cash equivalents	242,533		31,230	$ 27,059	$ 29,598
Rents and other receivables	9,685		9,588
Deferred rent	130,678		128,941
Lease contracts above market value, net	5,806		6,029
Deferred costs, net	24,018		23,774
Prepaid expenses and other assets	45,315		44,689
Total assets	3,081,232		2,815,492
Line of credit	0		0
Mortgage notes payable	114,183		114,075
Unsecured Term Loan	249,236		249,172
Unsecured notes payable	835,552		834,963
Accounts payable and accrued liabilities	28,094		32,301
Construction costs payable	21,247		22,043
Accrued interest payable	6,512		11,821
Distribution payable	47,724		43,906
Lease contracts below market value, net	3,793		4,132
Prepaid rents and other liabilities	67,037		67,477
Total liabilities	1,373,378		1,379,890
Redeemable partnership units	603,154		479,189
Commitments and contingencies	0		0
Total liabilities and stockholders’ equity	3,081,232		2,815,492
DuPont Fabros Technology, L.P. [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	94,203		94,203
Buildings and improvements	2,741,894		2,736,936
Income producing property	2,836,097		2,831,139
Less: accumulated depreciation	(585,338)		(560,837)
Net income producing property	2,250,759		2,270,302
Construction in progress and land held for development	372,438		300,939
Net real estate	2,623,197		2,571,241
Cash and cash equivalents	238,318		27,015	22,841	25,380
Rents and other receivables	9,685		9,588
Deferred rent	130,678		128,941
Lease contracts above market value, net	5,806		6,029
Deferred costs, net	24,018		23,774
Investment in affiliates	0		0
Prepaid expenses and other assets	45,315		44,689
Total assets	3,077,017		2,811,277
Line of credit	0		0
Mortgage notes payable	114,183		114,075
Unsecured Term Loan	249,236		249,172
Unsecured notes payable	835,552		834,963
Accounts payable and accrued liabilities	28,094		32,301
Construction costs payable	21,247		22,043
Accrued interest payable	6,512		11,821
Distribution payable	47,724		43,906
Lease contracts below market value, net	3,793		4,132
Prepaid rents and other liabilities	67,037		67,477
Total liabilities	1,373,378		1,379,890
Redeemable partnership units	603,154		479,189
Commitments and contingencies	0		0
General Partners' Capital	6,668		6,021
Total partners’ capital	1,100,485		952,198
Total liabilities and stockholders’ equity	3,077,017		2,811,277
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	232,298		21,697	19,080	21,806
Rents and other receivables	1,391		1,391
Deferred rent	0		0
Lease contracts above market value, net	0		0
Deferred costs, net	2,889		3,236
Investment in affiliates	2,605,307		2,546,465
Prepaid expenses and other assets	2,273		3,025
Total assets	2,844,158		2,575,814
Line of credit	0		0
Mortgage notes payable	0		0
Unsecured Term Loan	249,236		249,172
Unsecured notes payable	835,552		834,963
Accounts payable and accrued liabilities	1,297		4,516
Construction costs payable	196		43
Accrued interest payable	6,506		11,815
Distribution payable	47,724		43,906
Lease contracts below market value, net	0		0
Prepaid rents and other liabilities	8		12
Total liabilities	1,140,519		1,144,427
Redeemable partnership units	603,154		479,189
Commitments and contingencies	0		0
General Partners' Capital	6,668		6,021
Total partners’ capital	1,100,485		952,198
Total liabilities and stockholders’ equity	2,844,158		2,575,814
DuPont Fabros Technology, L.P. [Member] | Subsidiary Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	84,258		84,258
Buildings and improvements	2,399,654		2,399,016
Income producing property	2,483,912		2,483,274
Less: accumulated depreciation	(543,622)		(522,096)
Net income producing property	1,940,290		1,961,178
Construction in progress and land held for development	27,033		25,545
Net real estate	1,967,323		1,986,723
Cash and cash equivalents	0		0	0	0
Rents and other receivables	7,262		7,563
Deferred rent	122,903		122,830
Lease contracts above market value, net	5,806		6,029
Deferred costs, net	14,310		14,250
Investment in affiliates	0		0
Prepaid expenses and other assets	41,082		39,642
Total assets	2,158,686		2,177,037
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	21,624		23,615
Construction costs payable	652		293
Accrued interest payable	0		0
Distribution payable	0		0
Lease contracts below market value, net	3,793		4,132
Prepaid rents and other liabilities	60,967		62,630
Total liabilities	87,036		90,670
Redeemable partnership units	0		0
Commitments and contingencies	0		0
General Partners' Capital	0		0
Total partners’ capital	2,071,650		2,086,367
Total liabilities and stockholders’ equity	2,158,686		2,177,037
DuPont Fabros Technology, L.P. [Member] | Subsidiary Non-Guarantors [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Land	9,945		9,945
Buildings and improvements	342,240		337,920
Income producing property	352,185		347,865
Less: accumulated depreciation	(41,716)		(38,741)
Net income producing property	310,469		309,124
Construction in progress and land held for development	345,405		275,394
Net real estate	655,874		584,518
Cash and cash equivalents	6,020		5,318	3,761	3,574
Rents and other receivables	1,032		634
Deferred rent	7,775		6,111
Lease contracts above market value, net	0		0
Deferred costs, net	6,819		6,288
Investment in affiliates	0		0
Prepaid expenses and other assets	1,960		2,022
Total assets	679,480		604,891
Line of credit	0		0
Mortgage notes payable	114,183		114,075
Unsecured Term Loan	0		0
Unsecured notes payable	0		0
Accounts payable and accrued liabilities	5,173		4,170
Construction costs payable	20,399		21,707
Accrued interest payable	6		6
Distribution payable	0		0
Lease contracts below market value, net	0		0
Prepaid rents and other liabilities	6,062		4,835
Total liabilities	145,823		144,793
Redeemable partnership units	0		0
Commitments and contingencies	0		0
General Partners' Capital	0		0
Total partners’ capital	533,657		460,098
Total liabilities and stockholders’ equity	679,480		604,891
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	(2,605,307)		(2,546,465)
Prepaid expenses and other assets	0		0
Total assets	(2,605,307)		(2,546,465)
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		0
Commitments and contingencies	0		0
General Partners' Capital	0		0
Total partners’ capital	(2,605,307)		(2,546,465)
Total liabilities and stockholders’ equity	(2,605,307)		(2,546,465)
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	742,567		594,927
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	742,567		594,927
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	2,071,650		2,086,367
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	533,657		460,098
DuPont Fabros Technology, L.P. [Member] | Limited partners' common units [Member] | Eliminations [Member]
Supplemental Consolidating Statements Of Balance Sheets [Line Items]
Limited Partners' Capital	$ (2,605,307)		$ (2,546,465)
[1]	(1)Properties located in Ashburn, VA (ACC7 Phases III-IV, ACC8, ACC9, ACC10, and ACC11); Piscataway, NJ (NJ1 Phase II), Elk Grove Village, IL (CH2 Phases II-III and CH3) and Santa Clara, CA (SC1 Phase III, formerly referred to as SC2).

13. Supplemental Consolidatin66

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes Supplemental Consolidating Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Base rent	$ 82,533	$ 71,573
Recoveries from tenants	38,694	33,305
Other revenues	2,922	2,436
Total revenues	124,149	107,314
Expenses:
Property operating costs	35,955	31,493
Real estate taxes and insurance	5,316	3,976
Depreciation and amortization	25,843	25,027
General and administrative	5,575	4,343
Other expenses	2,349	7,253
Total expenses	75,038	72,092
Operating income	49,111	35,222
Interest:
Expense incurred	(11,569)	(8,247)
Amortization of deferred financing costs	(845)	(642)
Net income	36,697	26,333
Preferred stock dividends	(6,811)	(6,811)
Net income attributable to common units	29,886	19,522
DuPont Fabros Technology, L.P. [Member]
Revenues:
Base rent	82,533	71,573
Recoveries from tenants	38,694	33,305
Other revenues	2,922	2,436
Total revenues	124,149	107,314
Expenses:
Property operating costs	35,955	31,493
Real estate taxes and insurance	5,316	3,976
Depreciation and amortization	25,843	25,027
General and administrative	5,575	4,343
Other expenses	2,349	7,253
Total expenses	75,038	72,092
Operating income	49,111	35,222
Interest:
Expense incurred	(11,569)	(8,247)
Amortization of deferred financing costs	(845)	(642)
Equity in earnings	0	0
Net income	36,697	26,333
Preferred stock dividends	(6,811)	(6,811)
Net income attributable to common units	29,886	19,522
DuPont Fabros Technology, L.P. [Member] | Operating Partnership [Member]
Revenues:
Base rent	4,402	4,506
Recoveries from tenants	0	0
Other revenues	0	0
Total revenues	4,402	4,506
Expenses:
Property operating costs	0	0
Real estate taxes and insurance	0	0
Depreciation and amortization	15	11
General and administrative	5,433	4,213
Other expenses	106	5,591
Total expenses	5,554	9,815
Operating income	(1,152)	(5,309)
Interest:
Expense incurred	(14,174)	(10,603)
Amortization of deferred financing costs	(953)	(765)
Equity in earnings	52,976	43,010
Net income	36,697	26,333
Preferred stock dividends	(6,811)	(6,811)
Net income attributable to common units	29,886	19,522
DuPont Fabros Technology, L.P. [Member] | Subsidiary Guarantors [Member]
Revenues:
Base rent	69,366	66,284
Recoveries from tenants	34,375	30,824
Other revenues	464	426
Total revenues	104,205	97,534
Expenses:
Property operating costs	35,605	32,407
Real estate taxes and insurance	4,696	3,667
Depreciation and amortization	22,486	23,006
General and administrative	9	15
Other expenses	139	0
Total expenses	62,935	59,095
Operating income	41,270	38,439
Interest:
Expense incurred	0	981
Amortization of deferred financing costs	0	81
Equity in earnings	0	0
Net income	41,270	39,501
Preferred stock dividends	0	0
Net income attributable to common units	41,270	39,501
DuPont Fabros Technology, L.P. [Member] | Subsidiary Non-Guarantors [Member]
Revenues:
Base rent	13,204	5,327
Recoveries from tenants	4,319	2,481
Other revenues	2,482	2,027
Total revenues	20,005	9,835
Expenses:
Property operating costs	4,776	3,610
Real estate taxes and insurance	620	309
Depreciation and amortization	3,342	2,010
General and administrative	133	115
Other expenses	2,141	1,699
Total expenses	11,012	7,743
Operating income	8,993	2,092
Interest:
Expense incurred	2,605	1,375
Amortization of deferred financing costs	108	42
Equity in earnings	0	0
Net income	11,706	3,509
Preferred stock dividends	0	0
Net income attributable to common units	11,706	3,509
DuPont Fabros Technology, L.P. [Member] | Eliminations [Member]
Revenues:
Base rent	(4,439)	(4,544)
Recoveries from tenants	0	0
Other revenues	(24)	(17)
Total revenues	(4,463)	(4,561)
Expenses:
Property operating costs	(4,426)	(4,524)
Real estate taxes and insurance	0	0
Depreciation and amortization	0	0
General and administrative	0	0
Other expenses	(37)	(37)
Total expenses	(4,463)	(4,561)
Operating income	0	0
Interest:
Expense incurred	0	0
Amortization of deferred financing costs	0	0
Equity in earnings	(52,976)	(43,010)
Net income	(52,976)	(43,010)
Preferred stock dividends	0	0
Net income attributable to common units	$ (52,976)	$ (43,010)

13. Supplemental Consolidatin67

13. Supplemental Consolidating Financial Data for Subsidiary Guarantors of the Unsecured Notes Supplemental Consodlidating Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Supplemental Consolidating Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ 51,339	$ 49,092
Investments in real estate – development	(52,302)	(57,584)
Land acquisition costs - related party	(20,168)	0
Interest capitalized for real estate under development	(3,183)	(2,856)
Improvements to real estate	(2,099)	(574)
Additions to non-real estate property	(123)	(176)
Net cash used in investing activities	(77,875)	(61,190)
Proceeds	60,000	90,000
Repayments of Lines of Credit	(60,000)	0
Proceeds from Issuance of Common Stock	275,797	0
Equity compensation (payments) proceeds	7,007	(7,489)
Payments for Repurchase of Common Stock	0	(31,912)
Net cash provided by financing activities	237,839	9,559
Net increase (decrease) in cash and cash equivalents	211,303	(2,539)
Cash and cash equivalents, beginning	31,230	29,598
Cash and cash equivalents, ending	242,533	27,059
DuPont Fabros Technology, L.P. [Member]
Supplemental Consolidating Statements Of Cash Flows [Line Items]
Net Cash Provided by (Used in) Operating Activities	51,339	49,092
Investments in real estate – development	(52,302)	(57,584)
Land acquisition costs - related party	(20,168)	0
Investments in affiliates	0	0
Interest capitalized for real estate under development	(3,183)	(2,856)
Improvements to real estate	(2,099)	(574)
Additions to non-real estate property	(123)	(176)
Net cash used in investing activities	(77,875)	(61,190)
Proceeds	60,000	90,000
Repayments of Lines of Credit	(60,000)	0
Proceeds from Issuance of Common Stock	275,797	0
Equity compensation (payments) proceeds	7,007	(7,489)
Payments for Repurchase of Common Stock	0	(31,912)
Distributions	(44,965)	(41,040)
Net cash provided by financing activities	237,839	9,559
Net increase (decrease) in cash and cash equivalents	211,303	(2,539)
Cash and cash equivalents, beginning	27,015	25,380
Cash and cash equivalents, ending	238,318	22,841
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	(17,791)	(16,885)
Investments in real estate – development	0	(220)
Land acquisition costs - related party	0
Investments in affiliates	(9,419)	4,831
Interest capitalized for real estate under development	(2)	(6)
Improvements to real estate	0	0
Additions to non-real estate property	(26)	(5)
Net cash used in investing activities	(9,447)	4,600
Proceeds	60,000	90,000
Repayments of Lines of Credit	(60,000)
Proceeds from Issuance of Common Stock	275,797
Equity compensation (payments) proceeds	7,007	(7,489)
Payments for Repurchase of Common Stock		(31,912)
Distributions	(44,965)	(41,040)
Net cash provided by financing activities	237,839	9,559
Net increase (decrease) in cash and cash equivalents	210,601	(2,726)
Cash and cash equivalents, beginning	21,697	21,806
Cash and cash equivalents, ending	232,298	19,080
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	52,007	59,837
Investments in real estate – development	(1,197)	(4,599)
Land acquisition costs - related party	0
Investments in affiliates	(48,627)	(53,565)
Interest capitalized for real estate under development	0	(980)
Improvements to real estate	(2,099)	(522)
Additions to non-real estate property	(84)	(171)
Net cash used in investing activities	(52,007)	(59,837)
Proceeds	0	0
Repayments of Lines of Credit	0
Proceeds from Issuance of Common Stock	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
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	17,123	6,140
Investments in real estate – development	(51,105)	(52,765)
Land acquisition costs - related party	(20,168)
Investments in affiliates	58,046	48,734
Interest capitalized for real estate under development	(3,181)	(1,870)
Improvements to real estate	0	(52)
Additions to non-real estate property	(13)	0
Net cash used in investing activities	(16,421)	(5,953)
Proceeds	0	0
Repayments of Lines of Credit	0
Proceeds from Issuance of Common Stock	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	702	187
Cash and cash equivalents, beginning	5,318	3,574
Cash and cash equivalents, ending	6,020	3,761
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
Land acquisition costs - related party	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	0
Repayments of Lines of Credit	0
Proceeds from Issuance of Common Stock	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

14. Subsequent Events (Details)

14. Subsequent Events (Details) - Series A Preferred Stock [Member] - $ / shares	3 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Preferred stock, shares issued		7,400,000	7,400,000
Preferred Stock, Dividend Rate, Percentage		7.875%
Preferred Stock, Redemption Date		May 27, 2016
Preferred Stock, Liquidation Preference Per Share		$ 25
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock Redeemed or Called During Period, Shares	3,400,000