The amount of increase in utilities expense.

No definition available.

Name:	qts_IncreaseInUtilitiesExpense
Namespace Prefix:	qts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of reclassification of other comprehensive income to utilities expense.

+ References

No definition available.

+ Details

Name:	qts_ReclassificationOfOtherComprehensiveIncomeLossToUtilitiesExpense
Namespace Prefix:	qts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate fair value of all derivative liabilities designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=qts_CalpineEnergySolutionsLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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- Details

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Derivative Instruments - Power Purchase Agreements (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2019 agreement	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Increase In Utilities Expense		$ 700
Reclassification of other comprehensive income to utilities expense		(749)	$ 0	$ 0
Fair value		$ (6,693)
Piscataway \| Calpine Energy Solutions, LLC
Derivative [Line Items]
Expiration Date		Feb. 28, 2029
Fair value		$ (2,919)
Chicago \| Calpine Energy Solutions, LLC
Derivative [Line Items]
Expiration Date		Feb. 28, 2029
Fair value		$ (3,774)
Chicago And Piscataway \| Power Purchase Agreements
Derivative [Line Items]
Number of agreements \| agreement	2
Term of agreement	10 years