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Percentage of vesting of award, per quarter, under share-based payment arrangement.

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Represents the percentage of target award under share based compensation.

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Votes per share of class B common stock.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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Number of options outstanding, including both vested and non-vested options.

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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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Partners' Capital, Equity and Incentive Compensation Plans - Additional Information (Details) $ in Millions			1 Months Ended	3 Months Ended
	Mar. 04, 2021 shares	Oct. 13, 2013 Vote	Mar. 31, 2019	Mar. 31, 2021 USD ($) class shares	Dec. 31, 2020 shares
Partners Capital And Distributions [Line Items]
Options outstanding (in shares)				100,000
Equity based compensation expense unrecognized \| $				$ 51.4
Equity based compensation expense vesting period				1 year
Class O Units and Options
Partners Capital And Distributions [Line Items]
Equity based compensation awards intrinsic value \| $				$ 47.5
First portion \| Performance-Based FFO Units
Partners Capital And Distributions [Line Items]
Vesting period			2 years
Second portion \| Performance-Based FFO Units
Partners Capital And Distributions [Line Items]
Vesting period			3 years
Second portion \| Restricted Class A Common Stock
Partners Capital And Distributions [Line Items]
Vesting percentage, per quarter				8.375%
Vesting percentage				33.00%
2013 Equity Incentive Plan \| Performance-Based FFO Units
Partners Capital And Distributions [Line Items]
Options outstanding (in shares)				237,669	132,267
2013 Equity Incentive Plan \| Performance-Based Relative TSR Units
Partners Capital And Distributions [Line Items]
Options outstanding (in shares)				273,954	168,552
QualityTech, LP
Partners Capital And Distributions [Line Items]
Number of classes of partnership units outstanding \| class				4
Class B Common Stock
Partners Capital And Distributions [Line Items]
Number of votes per share \| Vote		50
Class B Common Stock \| Chief Executive Officer
Partners Capital And Distributions [Line Items]
Percentage of operating partnership unit exchanged		2.00%
Class A Common Stock \| Performance-Based FFO Units \| Minimum
Partners Capital And Distributions [Line Items]
Percentage of target award			0.00%
Class A Common Stock \| Performance-Based FFO Units \| Maximum
Partners Capital And Distributions [Line Items]
Percentage of target award			200.00%
Class A Common Stock \| Performance-Based Relative TSR Units
Partners Capital And Distributions [Line Items]
Performance period				3 years
Class A Common Stock \| Performance-Based Relative TSR Units \| Minimum
Partners Capital And Distributions [Line Items]
Percentage of target award			0.00%
Class A Common Stock \| Performance-Based Relative TSR Units \| Maximum
Partners Capital And Distributions [Line Items]
Percentage of target award			200.00%
Class A Common Stock \| 2013 Equity Incentive Plan
Partners Capital And Distributions [Line Items]
Authorized shares to be issued under the plan				5,900,000
Additional shares available for issuance under plan approved by stockholders	2,000,000.0
Preferred Units Series A [Member] \| QualityTech, LP
Partners Capital And Distributions [Line Items]
Exchange rate for cash or shares				1