INTERIM CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Preferred stock, liquidation preference	$ 25.00
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	450,133,000	450,133,000
Common stock, shares issued	64,442,343	58,227,523
Common stock, shares outstanding	64,442,343	58,227,523
QualityTech, LP | Series A Redeemable Perpetual Preferred Units
Dividend rate (as a percent)	7.125%	7.125%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, liquidation preference	$ 25.00	$ 25.00
Preferred stock, shares authorized	4,600,000	4,600,000
Preferred stock, shares issued	4,280,000	4,280,000
Preferred stock, shares outstanding	4,280,000	4,280,000
QualityTech, LP | Series B Redeemable Perpetual Preferred Units
Dividend rate (as a percent)	6.50%	6.50%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, liquidation preference	$ 100.00	$ 100.00
Preferred stock, shares authorized	3,162,500	3,162,500
Preferred stock, shares issued	3,162,500	3,162,500
Preferred stock, shares outstanding	3,162,500	3,162,500
QualityTech, LP | Common units
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	450,133,000	450,133,000
Common stock, shares issued	71,100,542	64,901,157
Common stock, shares outstanding	71,100,542	64,901,157
Series A Redeemable Perpetual Preferred Stock
Dividend rate (as a percent)	7.125%	7.125%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, liquidation preference	$ 25.00	$ 25.00
Preferred stock, shares authorized	4,600,000	4,600,000
Preferred stock, shares issued	4,280,000	4,280,000
Preferred stock, shares outstanding	4,280,000	4,280,000
Series B Convertible Perpetual Preferred Stock
Dividend rate (as a percent)	6.50%	6.50%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, liquidation preference	$ 100.00	$ 100.00
Preferred stock, shares authorized	3,162,500	3,162,500
Preferred stock, shares issued	3,162,500	3,162,500
Preferred stock, shares outstanding	3,162,500	3,162,500