Summary of Recourse and Market-to-Market Provisions (Parenthetical) (Details)		6 Months Ended
May 03, 2021	Jun. 30, 2021
Institutional Lender \| Asset-specific Financing
Debt Instrument [Line Items]
Extended maturity date	May 04, 2022
Secured Credit Facilities
Debt Instrument [Line Items]
Extended maturity date	May 04, 2022
Secured Credit Facilities \| Holdco
Debt Instrument [Line Items]
Extended maturity date		Aug. 19, 2021
Extended maturity date		Aug. 19, 2022

Debt instrument extended maturity date.

No definition available.

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Namespace Prefix:	trtx_
Data Type:	xbrli:dateItemType
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- 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
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Period Type:	duration

- Definition

Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

+ 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
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:dateItemType
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Period Type:	duration

- Definition

Earliest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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Namespace Prefix:
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