CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Rental	$ 465,123	$ 413,620	$ 379,787
Other	15,695	36,904	66,723
Total revenues	480,818	450,524	446,510
Operating Expenses:
Property operating costs	156,048	148,236	153,209
Real estate taxes and insurance	14,503	12,193	11,959
Depreciation and amortization	168,305	149,891	140,924
General and administrative	80,385	80,857	87,231
Transaction, integration and impairment costs	15,190	2,743	11,060
Restructuring		37,943
Total operating expenses	434,431	431,863	404,383
Gain on sale of real estate, net	14,769
Operating income	61,156	18,661	42,127
Other income and expenses:
Interest income	111	150	67
Interest expense	(26,593)	(28,749)	(30,523)
Debt restructuring costs	(1,523)	(605)	(19,992)
Other income (expense)	(50)
Equity in net loss of unconsolidated entity	(1,473)
Income (loss) before taxes	31,628	(10,543)	(8,321)
Tax benefit of taxable REIT subsidiaries	37	3,368	9,778
Net income (loss)	31,665	(7,175)	1,457
Net (income) loss attributable to noncontrolling interests	(374)	2,715	(175)
Net income (loss) attributable to QTS Realty Trust, Inc.	31,291	(4,460)	1,282
Preferred stock dividends	(28,180)	(16,666)
Net income (loss) attributable to common stockholders	$ 3,111	$ (21,126)	$ 1,282
Net income per share attributable to Class A common shares:
Basic (in dollars per share)	$ (0.09)	$ (0.44)	$ 0.01
Diluted (in dollars per share)	$ (0.09)	$ (0.44)	$ 0.01
Weighted average Class A common shares outstanding:
Basic (in shares)	54,836,801	50,432,590	48,380,964
Diluted (in shares)	54,836,801	50,432,590	55,855,683
Qualitytech, LP
Revenues:
Rental	$ 465,123	$ 413,620	$ 379,787
Other	15,695	36,904	66,723
Total revenues	480,818	450,524	446,510
Operating Expenses:
Property operating costs	156,048	148,236	153,209
Real estate taxes and insurance	14,503	12,193	11,959
Depreciation and amortization	168,305	149,891	140,924
General and administrative	80,385	80,857	87,231
Transaction, integration and impairment costs	15,190	2,743	11,060
Restructuring		37,943
Total operating expenses	434,431	431,863	404,383
Gain on sale of real estate, net	14,769
Operating income	61,156	18,661	42,127
Other income and expenses:
Interest income	111	150	67
Interest expense	(26,593)	(28,749)	(30,523)
Debt restructuring costs	(1,523)	(605)	(19,992)
Other income (expense)	(50)
Equity in net loss of unconsolidated entity	(1,473)
Income (loss) before taxes	31,628	(10,543)	(8,321)
Tax benefit of taxable REIT subsidiaries	37	3,368	9,778
Net income (loss)	31,665	(7,175)	1,457
Preferred stock dividends	(28,180)	(16,666)
Net income (loss) attributable to common stockholders	$ 3,485	$ (23,841)	$ 1,457