Debt extension period

No definition available.

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Namespace Prefix:	qts_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of term loans in credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	qts_
Data Type:	xbrli:integerItemType
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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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 4: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Name:	us-gaap_DebtInstrumentCarryingAmount
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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 835
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-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

+ Details

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

- 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

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

- Details

Name:	us-gaap_CreditFacilityAxis=qts_TermLoanMember
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- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
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- 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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- Details

Name:	us-gaap_CreditFacilityAxis=qts_TermLoanAndTermLoanBMember
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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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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) $ in Thousands	1 Months Ended	9 Months Ended
	Oct. 31, 2019 USD ($)	Sep. 30, 2019 USD ($) loan	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Debt issuance costs, net		$ 6,230	$ 7,671
Debt Weighted Average Interest Rate		3.73%
Term Loan
Debt Instrument [Line Items]
Outstanding debt		$ 700,000
Debt issuance costs, net		$ 5,500
Revolving Credit Facility
Debt Instrument [Line Items]
Maturity date		Dec. 17, 2022
Outstanding debt		$ 224,149	252,000
Debt Weighted Average Interest Rate		2.98%
Letter of Credit [Member]
Debt Instrument [Line Items]
Letter of credit outstanding		$ 4,100
Unsecured Credit Facility
Debt Instrument [Line Items]
Number of term loans \| loan		2
Outstanding debt		$ 924,000
Debt Instrument, Covenant Compliance		we were in compliance with all of our covenants
Unsecured Credit Facility \| Term Loan
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 350,000
Unsecured Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 820,000
Unsecured Credit Facility Two
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 2,200,000
Debt extension period	1 year
Unsecured Credit Facility Two \| Term Loan Maturing April 27 2025
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 225,000
Maturity date	Apr. 27, 2025
Unsecured Credit Facility Two \| Term Loan Maturing December 17 2023
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 1,000,000
Maturity date	Dec. 17, 2023
Unsecured Credit Facility Two \| Term Loan Maturing December 17 2024
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 225,000
Maturity date	Dec. 17, 2024
Unsecured Credit Facility Two \| Term Loan Maturing October 18 2026
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 250,000
Maturity date	Oct. 18, 2026
Unsecured Credit Facility Two \| Minimum \| Term Loan A and Term Loan B \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	1.20%
Unsecured Credit Facility Two \| Minimum \| Term Loan A and Term Loan B \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	0.20%
Unsecured Credit Facility Two \| Minimum \| Term Loan C \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	1.50%
Unsecured Credit Facility Two \| Minimum \| Term Loan C \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	0.50%
Unsecured Credit Facility Two \| Minimum \| Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	1.25%
Unsecured Credit Facility Two \| Minimum \| Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	0.25%
Unsecured Credit Facility Two \| Maximum
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 300,000
Unsecured Credit Facility Two \| Maximum \| Term Loan A and Term Loan B \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	1.80%
Unsecured Credit Facility Two \| Maximum \| Term Loan A and Term Loan B \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	0.80%
Unsecured Credit Facility Two \| Maximum \| Term Loan C \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	1.85%
Unsecured Credit Facility Two \| Maximum \| Term Loan C \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	0.85%
Unsecured Credit Facility Two \| Maximum \| Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	1.85%
Unsecured Credit Facility Two \| Maximum \| Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate	0.85%
Operating Partnership And QTS Finance Corporation
Debt Instrument [Line Items]
Maturity date		Nov. 15, 2025
Outstanding debt		$ 400,000	$ 400,000
Debt Weighted Average Interest Rate		4.75%
Operating Partnership And QTS Finance Corporation \| Operating Partnership Quality Tech LP And QTS Finance Corporation
Debt Instrument [Line Items]
Debt issuance costs, net		$ 4,600