Credit facility covenant, maximum distribution payout ratio of funds from operations

No definition available.

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- Definition

Credit facility covenant, percentage of net equity offering proceeds and interest in Operating Partnership in addition to minimum tangible net worth requirement

+ References

No definition available.

+ Details

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- Definition

Debt extension period

+ References

No definition available.

+ Details

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- Definition

The maximum amount of the credit facility after increase, contingent on certain conditions being met.

+ References

No definition available.

+ Details

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- Definition

Leverage Ratio Limit Under Existing Revolving Credit Facility

+ References

No definition available.

+ Details

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- Definition

Line of credit facility accordion feature.

+ References

No definition available.

+ Details

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

- Definition

Line Of Credit Facility Weighted Average Percentage Outstanding Interest Rate.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

The maximum percentage of debt to gross asset value for the two consecutive fiscal quarters immediately following the acquisition .

+ References

No definition available.

+ Details

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- Definition

Maximum percentage of unencumbered asset pool capitalized value.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum percentage of unencumbered asset pool capitalized value for two consecutive quarters

+ References

No definition available.

+ Details

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- Definition

Percentage of maximum debt to gross asset value.

+ References

No definition available.

+ Details

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Namespace Prefix:	qts_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of operating partnerships gross asset value.

+ References

No definition available.

+ Details

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Namespace Prefix:	qts_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Unencumbered asset pool debt yield limit

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of unencumbered asset pool debt yield for the two consecutive fiscal quarters immediately following a material acquisition for which the Operating Partnership has provided written notice to the Agent.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

+ References

+ Details

Name:	us-gaap_DebtInstrumentCovenantCompliance
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)(a)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Balance Type:
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- Details

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Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=qts_UnsecuredRevolvingCreditFacilityMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
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Balance Type:
Period Type:

- Details

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Period Type:

- Details

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- Details

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- Details

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- Details

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- Details

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Debt (Unsecured Credit Facility Narrative) (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Unencumbered asset pool debt yield limit	14.00%	14.00%
Unencumbered asset pool debt yield limit for two consecutive quarters	12.50%
Percentage of operating partnerships gross asset value		15.00%
Term Loan Maturing April 27, 2021
Debt Instrument [Line Items]
Maturity date		Apr. 27, 2023
Term Loan Maturing December 17, 2020
Debt Instrument [Line Items]
Maturity date			Dec. 17, 2022
Revolving Credit Facility
Debt Instrument [Line Items]
Maturity date		Dec. 17, 2021
Debt Instrument Carrying Amount			$ 131,000,000
Outstanding debt			131,000,000
Credit facility availability	$ 820,000,000	$ 820,000,000
Maximum percentage of unencumbered asset pool capitalized value	60.00%	60.00%
Maximum percentage of unencumbered asset pool capitalized value for two consecutive quarters	65.00%
Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	$ 0	$ 0
Outstanding debt	0	0
Letter of Credit [Member]
Debt Instrument [Line Items]
Letter of credit outstanding	$ 4,100,000	$ 4,100,000
Line of credit facility weighted average interest rate outstanding percentage	3.50%	3.50%
Unsecured Credit Facility
Debt Instrument [Line Items]
Line of credit facility accordion feature		$ 400,000,000
Maximum percentage of unencumbered asset pool capitalized value	60.00%	60.00%
Maximum percentage of unencumbered asset pool capitalized value for two consecutive quarters		65.00%
Unencumbered asset pool debt yield limit	14.00%	14.00%
Unencumbered asset pool debt yield limit for two consecutive quarters	12.50%
Leverage ratio	1.70%	1.70%
Minimum \| Term Loan \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		1.50%
Minimum \| Term Loan \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		0.50%
Minimum \| Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		1.55%
Minimum \| Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		0.55%
Maximum \| Term Loan \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		2.10%
Maximum \| Term Loan \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		1.10%
Maximum \| Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		2.15%
Maximum \| Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		1.15%
Unsecured Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity			1,520,000,000
Debt extension period		1 year
Credit facility maximum borrowing capacity after increase which is contingent on certain conditions	$ 1,920,000,000	$ 1,920,000,000
Debt Instrument Carrying Amount	700,000,000	700,000,000
Outstanding debt	700,000,000	700,000,000
Minimum tangible net worth	$ 1,209,000,000	$ 1,209,000,000
Credit facility covenant, percentage ownership requirements in addition to minimum tangible net worth	75.00%	75.00%
Credit facility covenant, maximum distribution payout ratio of funds from operations	95.00%	95.00%
Maximum percentage on gross asset value		60.00%
Maximum percentage to gross asset value for the next two quarters		65.00%
Debt Instrument, Covenant Compliance		the Company was in compliance with all of its covenants
Unsecured Credit Facility \| Term Loan Maturing April 27, 2021
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity			350,000,000
Unsecured Credit Facility \| Term Loan Maturing December 17, 2020
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity			350,000,000
Unsecured Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity			$ 820,000,000
Maturity date			Dec. 17, 2021