Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flow from operating activities
Net income	$ 32,516	$ 45,130
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	69,773	66,885
Straight line rent	(5,323)	(16,824)
Amortization of deferred financing costs	(2,542)	(2,677)
Write off of Deferred Debt Issuance Cost	32,310	0
Amortization of lease contracts above and below market value	(1,793)	(2,595)
Compensation paid with Company common shares	5,076	5,333
Changes in operating assets and liabilities
Rents and other receivables	(2,376)	(1,668)
Deferred costs	(2,132)	(898)
Prepaid expenses and other assets	(10,951)	(6,128)
Accounts payable and accrued liabilities	4,593	739
Accrued interest payable	2,050	11,742
Prepaid rents and other liabilities	14,365	(1,653)
Net cash provided by operating activities	140,650	102,740
Cash flow from investing activities
Investments in real estate – development	(50,164)	(82,754)
Payments to Acquire Land	(14,186)	0
Interest capitalized for real estate under development	(1,522)	(2,654)
Improvements to real estate	(5,035)	(3,333)
Additions to non-real estate property	(24)	(55)
Net cash used in investing activities	(70,931)	(88,796)
Line of credit:
Proceeds	102,000	15,000
Repayments	(120,000)	(35,000)
Mortgage notes payable:
Proceeds from Issuance of Secured Debt	115,000	0
Repayments of Notes Payable	(138,300)	0
Repayments	(1,300)	(3,900)
Proceeds from Issuance of Unsecured Debt	120,000	0
Proceeds from Unsecured Notes Payable	600,000	0
Repayments of Unsecured Debt	(418,111)	0
Payments of financing costs	(18,073)	(2,084)
Payments of Debt Extinguishment Costs	(25,462)	0
Issuance of preferred stock, net of offering costs	0	62,685
Exercises of stock options	61	868
Payments for Repurchase of Common Stock	(37,792)	0
Dividends and distributions:
Common shares	(41,772)	(24,616)
Preferred shares	(20,434)	(19,195)
Redeemable noncontrolling interests – operating partnership	(10,918)	(7,388)
Net cash provided by financing activities	104,899	(13,630)
Net increase (decrease) in cash and cash equivalents	174,618	314
Cash and cash equivalents, beginning	23,578	14,402
Cash and cash equivalents, ending	198,196	14,716
Supplemental information:
Cash paid for interest	36,961	27,384
Deferred financing costs capitalized for real estate under development	95	161
Construction costs payable capitalized for real estate under development	22,243	10,549
Redemption of operating partnership units	70,200	5,700
Adjustments to redeemable noncontrolling interests – operating partnership	34,326	21,643
DuPont Fabros Technology, L.P. [Member]
Cash flow from operating activities
Net income	32,516	45,130
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	69,773	66,885
Straight line rent	(5,323)	(16,824)
Amortization of deferred financing costs	(2,542)	(2,677)
Write off of Deferred Debt Issuance Cost	32,310	0
Amortization of lease contracts above and below market value	(1,793)	(2,595)
Compensation paid with Company common shares	5,076	5,333
Changes in operating assets and liabilities
Rents and other receivables	(2,376)	(1,668)
Deferred costs	(2,132)	(898)
Prepaid expenses and other assets	(10,951)	(6,128)
Accounts payable and accrued liabilities	4,593	739
Accrued interest payable	2,050	11,742
Prepaid rents and other liabilities	14,365	(1,653)
Net cash provided by operating activities	140,650	102,740
Cash flow from investing activities
Investments in real estate – development	(50,164)	(82,754)
Payments to Acquire Land	(14,186)	0
Interest capitalized for real estate under development	(1,522)	(2,654)
Improvements to real estate	(5,035)	(3,333)
Additions to non-real estate property	(24)	(55)
Net cash used in investing activities	(70,931)	(88,796)
Line of credit:
Proceeds	102,000	15,000
Repayments	(120,000)	(35,000)
Mortgage notes payable:
Proceeds from Issuance of Secured Debt	115,000	0
Repayments of Notes Payable	(138,300)	0
Repayments	(1,300)	(3,900)
Proceeds from Issuance of Unsecured Debt	120,000	0
Proceeds from Unsecured Notes Payable	600,000	0
Repayments of Unsecured Debt	(418,111)	0
Payments of financing costs	(18,073)	(2,084)
Payments of Debt Extinguishment Costs	(25,462)	0
Issuance of preferred stock, net of offering costs	0	62,694
Exercises of stock options	61	868
Payments for Repurchase of Common Stock	(37,792)	0
Proceeds from Related Party Debt	0	4,000
Distributions	(73,124)	(51,199)
Dividends and distributions:
Net cash provided by financing activities	104,899	(9,621)
Net increase (decrease) in cash and cash equivalents	174,618	4,323
Cash and cash equivalents, beginning	19,282	10,097
Cash and cash equivalents, ending	193,900	14,420
Supplemental information:
Cash paid for interest	36,961	27,384
Deferred financing costs capitalized for real estate under development	95	161
Construction costs payable capitalized for real estate under development	22,243	10,549
Redemption of operating partnership units	70,200	5,700
Adjustments to redeemable noncontrolling interests – operating partnership	$ (25,591)	$ (19,474)