STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2013		Oct. 14, 2013	Dec. 31, 2014		Dec. 31, 2012	Dec. 31, 2013
Revenues:
Rental	$ 33,304			$ 175,649
Recoveries from customers	2,674			19,194
Cloud and managed services	4,074			20,231
Other	410			2,715
Total revenues	40,462			217,789
Operating Expenses:
Property operating costs	13,482			71,518
Real estate taxes and insurance	1,016			5,116
Depreciation and amortization	11,238			58,282
General and administrative	8,457			45,283
Restructuring				1,298
Transaction costs	66			1,018
Total operating expenses	34,259			182,515
Operating income	6,203			35,274
Other income and expenses:
Interest income	1			8
Interest expense	(2,049)			(15,308)
Other (expense) income, net	(153)			(871)
Income (loss) before gain on sale of real estate	4,002			19,103
Net income (loss)	4,002	[1]	(152)	19,103	[1]	(9,767)
Net income attributable to noncontrolling interests	(848)			(4,031)
Net income (loss)	3,154			15,072
Unrealized gain (loss) on swap	74
Comprehensive income (loss)	3,228			15,072
Net income per share attributable to common shares:
Basic	$ 0.11	[2]		$ 0.52
Diluted	$ 0.11	[2]		$ 0.51
Weighted average common shares outstanding:
Basic	28,972,774			29,054,576
Diluted	36,794,215	[3]		37,133,584	[3]
Historical Predecessor [Member]
Revenues:
Rental			112,002			120,758
Recoveries from customers			10,424			9,294
Cloud and managed services			13,457			14,497
Other			1,542			1,210
Total revenues			137,425			145,759
Operating Expenses:
Property operating costs			47,268			51,506
Real estate taxes and insurance			3,476			3,632
Depreciation and amortization			36,120			34,932
General and administrative			30,726			35,986
Restructuring						3,291
Transaction costs			52			897
Total operating expenses			117,642			130,244
Operating income			19,783			15,515
Other income and expenses:
Interest income			17			61
Interest expense			(16,675)			(25,140)
Other (expense) income, net			(3,277)			(1,151)
Income (loss) before gain on sale of real estate			(152)			(10,715)
Gain on sale of real estate						948
Net income (loss)			(152)			(9,767)
Net income (loss)			(152)			(9,767)
Unrealized gain (loss) on swap			220			(766)
Comprehensive income (loss)			68			(10,533)
Qualitytech, LP [Member]
Revenues:
Rental				175,649		120,758	145,306
Recoveries from customers				19,194		9,294	13,098
Cloud and managed services				20,231		14,497	17,531
Other				2,715		1,210	1,952
Total revenues				217,789		145,759	177,887
Operating Expenses:
Property operating costs				71,518		51,506	60,750
Real estate taxes and insurance				5,116		3,632	4,492
Depreciation and amortization				58,282		34,932	47,358
General and administrative				45,283		35,986	39,183
Restructuring				1,298		3,291
Transaction costs				1,018		897	118
Total operating expenses				182,515		130,244	151,901
Operating income				35,274		15,515	25,986
Other income and expenses:
Interest income				8		61	18
Interest expense				(15,308)		(25,140)	(18,724)
Other (expense) income, net				(871)		(1,151)	(3,430)
Income (loss) before gain on sale of real estate				19,103		(10,715)	3,850
Gain on sale of real estate						948
Net income (loss)				19,103		(9,767)	3,850
Net income (loss)				19,103		(9,767)	3,850
Unrealized gain (loss) on swap						(766)	294
Comprehensive income (loss)				$ 19,103		$ (10,533)	$ 4,144

[1] (1) Includes 7,770 Class A and Class RS units, 195 “in the money” value of Class O units on an “as if” converted basis and 114 “in the money” value options to purchase shares of Class A common stock on an “as if” converted basis as of the year ended December 31, 2014. As of the year ended December 31, 2013, this amount includes 7,797 Class A and Class RS units and 24 “in the money” value of Class O units

[2] Net income per share attributable to QTS Realty Trust, Inc. for the period October 15, 2013 through December 31, 2013.

[3] Includes 7,770 Class A and Class RS units, 195 “in the money” value of Class O units on an “as if” converted basis and 114 “in the money” value options to purchase shares of Class A common stock on an “as if” converted basis as of the year ended December 31, 2014. As of the year ended December 31, 2013, this amount includes 7,797 Class A and Class RS units and 24 “in the money” value of Class O units on as “as if” converted basis.