Debt instrument weighted average maturity period.

No definition available.

Name:	trtx_DebtInstrumentWeightedAverageMaturityPeriod
Namespace Prefix:	trtx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Loans held for investment, aggregate unpaid principal balance percentage.

+ References

No definition available.

+ Details

Name:	trtx_LoansHeldForInvestmentAggregateUnpaidPrincipalBalancePercentage
Namespace Prefix:	trtx_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of loans.

+ References

No definition available.

+ Details

Name:	trtx_NumberOfLoans
Namespace Prefix:	trtx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Other loan held for investment, net.

+ References

No definition available.

+ Details

Name:	trtx_OtherLoanHeldForInvestmentNet
Namespace Prefix:	trtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Participating Mortgage Loans, Minimum Conversion

+ References

No definition available.

+ Details

Name:	trtx_ParticipatingMortgageLoansMinimumConversion
Namespace Prefix:	trtx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Participating Mortgage Loans, Number Of Participation Interest

+ References

No definition available.

+ Details

Name:	trtx_ParticipatingMortgageLoansNumberOfParticipationInterest
Namespace Prefix:	trtx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Securitized Debt Obligation Carrying Value

+ References

No definition available.

+ Details

Name:	trtx_SecuritizedDebtObligationCarryingValue
Namespace Prefix:	trtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Securitized Debt Obligations

+ References

No definition available.

+ Details

Name:	trtx_SecuritizedDebtObligations
Namespace Prefix:	trtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-3

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(8))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_AmortizationOfFinancingCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482900/835-30-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69E

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69F
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69F

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480167/946-830-55-10

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483581/946-220-45-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(3))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-3

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (210.5-03(11))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483013/835-20-50-1

+ Details

Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate amount of the participation liability at the end of the accounting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 470
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481212/470-30-50-1

+ Details

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

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=trtx_FL2NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=trtx_FL3NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=trtx_FL4NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_UnderlyingAssetClassAxis=us-gaap_CollateralizedLoanObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=trtx_FL3MortgageAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=trtx_CollateralLoanInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_DebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=trtx_SecuredOvernightFinancingRateSOFRMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=trtx_LondonInterbankOfferedRateLIBOR1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=trtx_CompoundedSecuredOvernightFinancingRateSofrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=trtx_FL5NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=trtx_FL4SecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=trtx_FL5SecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=trtx_CollateralAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=us-gaap_CollateralizedLoanObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Variable Interest Entities and Collateralized Loan Obligations - Schedule of Borrowings and Corresponding Collateral (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023 USD ($) loan	Mar. 31, 2023	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) loan	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) participationInterest loan
Debt Instrument [Line Items]
Number of loans \| loan	63			63		70
Other loan held for investment, net	$ 3,200			$ 3,200
Interest expense	$ 70,570		$ 28,008	140,560	$ 50,509
Amortization of deferred financing costs				$ 7,437	7,400
Minimum conversion rate	0.50			0.50		0.50
FL2-Notes
Debt Instrument [Line Items]
Loans held for investment, aggregate unpaid principal balance percentage						14.10%
TRTX 2019-FL3
Debt Instrument [Line Items]
Loans held for investment, aggregate unpaid principal balance percentage						25.00%
TRTX 2021-FL4
Debt Instrument [Line Items]
Loans held for investment, aggregate unpaid principal balance percentage						21.50%
Collateralized loan obligations
Debt Instrument [Line Items]
Interest expense	$ 39,200		18,200	$ 76,800	32,500
Amortization of deferred financing costs	$ 1,200		$ 1,900	$ 2,300	$ 4,100
Collateralized loan obligations \| FL3 Mortgage Assets
Debt Instrument [Line Items]
Loans held for investment, aggregate unpaid principal balance percentage	10.50%			10.50%
Collateralized loan obligations \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)	3.45%			3.45%		3.19%
Weighted average maturity (years)		2 years 8 months 12 days		2 years 4 months 24 days
Collateralized loan obligations \| Debt (Notes Issued)
Debt Instrument [Line Items]
Number of loans \| loan	3			3		3
Collateral (loans), outstanding principal	$ 2,142,939			$ 2,142,939		$ 2,461,170
Collateral (loans), carrying value	$ 2,136,382			$ 2,136,382		$ 2,452,212
Weighted average credit spread (in percent)	1.90%			1.90%		1.78%
Weighted average maturity (years)		14 years 9 months 18 days		14 years 7 months 6 days
Collateralized loan obligations \| SOFR \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Number of loans \| loan	43			43
Collateralized loan obligations \| LIBOR \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Number of loans \| loan						51
Collateralized loan obligations \| FL2-Notes \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)						3.16%
Weighted average maturity (years)		1 year 4 months 24 days
Collateralized loan obligations \| FL2-Notes \| Debt (Notes Issued)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)						1.72%
Weighted average maturity (years)		11 years 9 months 18 days
Collateralized loan obligations \| FL2-Notes \| SOFR \| Debt (Notes Issued)
Debt Instrument [Line Items]
Number of loans \| loan						1
Collateral (loans), outstanding principal						$ 516,639
Collateral (loans), carrying value						$ 516,639
Collateralized loan obligations \| FL2-Notes \| LIBOR \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Number of loans \| loan						10
Collateralized loan obligations \| TRTX 2019-FL3 \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)	3.35%			3.35%		3.08%
Weighted average maturity (years)		2 years 8 months 12 days		1 year 1 month 6 days
Collateralized loan obligations \| TRTX 2019-FL3 \| Debt (Notes Issued)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)	2.05%			2.05%		1.60%
Weighted average maturity (years)		15 years 2 months 12 days		11 years 3 months 18 days
Collateralized loan obligations \| TRTX 2019-FL3 \| SOFR \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Number of loans \| loan	9			9
Collateralized loan obligations \| TRTX 2019-FL3 \| SOFR \| Debt (Notes Issued)
Debt Instrument [Line Items]
Number of loans \| loan	1			1
Collateral (loans), outstanding principal	$ 287,256			$ 287,256
Collateral (loans), carrying value	$ 287,256			$ 287,256
Collateralized loan obligations \| TRTX 2019-FL3 \| LIBOR \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Number of loans \| loan						23
Collateralized loan obligations \| TRTX 2019-FL3 \| LIBOR \| Debt (Notes Issued)
Debt Instrument [Line Items]
Number of loans \| loan	2			2		1
Collateral (loans), outstanding principal	$ 111,400			$ 111,400		$ 1,037,500
Collateral (loans), carrying value						$ 1,033,264
Collateralized loan obligations \| TRTX 2021-FL4 \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)	3.42%			3.42%		3.31%
Weighted average maturity (years)		3 years 4 months 24 days		2 years 7 months 6 days
Collateralized loan obligations \| TRTX 2021-FL4 \| Debt (Notes Issued)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)	1.75%			1.75%		2.02%
Weighted average maturity (years)		16 years 1 month 6 days		14 years 8 months 12 days
Collateralized loan obligations \| TRTX 2021-FL4 \| SOFR
Debt Instrument [Line Items]
Participating interest						$ 118,900
Number of participation interest \| participationInterest						4
Collateralized loan obligations \| TRTX 2021-FL4 \| SOFR \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Number of loans \| loan	18			18
Collateralized loan obligations \| TRTX 2021-FL4 \| SOFR \| Debt (Notes Issued)
Debt Instrument [Line Items]
Number of loans \| loan	1			1
Collateral (loans), outstanding principal	$ 948,652			$ 948,652
Collateral (loans), carrying value	$ 945,811			$ 945,811
Collateralized loan obligations \| TRTX 2021-FL4 \| LIBOR \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Number of loans \| loan						18
Collateralized loan obligations \| TRTX 2021-FL4 \| Compounded SOFR(6) \| Debt (Notes Issued)
Debt Instrument [Line Items]
Number of loans \| loan						1
Collateral (loans), outstanding principal						$ 907,031
Collateral (loans), carrying value						902,309
Collateralized loan obligations \| TRTX 2022-FL5 \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)	3.51%			3.51%
Weighted average maturity (years)				3 years 1 month 6 days
Collateralized loan obligations \| TRTX 2022-FL5 \| Debt (Notes Issued)
Debt Instrument [Line Items]
Weighted average credit spread (in percent)	2.02%			2.02%
Weighted average maturity (years)				15 years 7 months 6 days
Collateralized loan obligations \| TRTX 2022-FL5 \| SOFR
Debt Instrument [Line Items]
Participating interest						$ 178,500
Number of participation interest \| participationInterest						2
Collateralized loan obligations \| TRTX 2022-FL5 \| SOFR \| Collateral (Loan Investments)
Debt Instrument [Line Items]
Number of loans \| loan	16			16
Collateralized loan obligations \| TRTX 2022-FL5 \| LIBOR \| Debt (Notes Issued)
Debt Instrument [Line Items]
Number of loans \| loan	1			1
Collateral (loans), outstanding principal	$ 21,600			$ 21,600
Collateralized loan obligations \| TRTX 2022-FL5 \| Compounded SOFR(6) \| Debt (Notes Issued)
Debt Instrument [Line Items]
Number of loans \| loan	1			1
Collateral (loans), outstanding principal	$ 907,031			$ 907,031
Collateral (loans), carrying value	$ 903,315			$ 903,315
Collateralized loan obligations \| FL4 Securities
Debt Instrument [Line Items]
Loans held for investment, aggregate unpaid principal balance percentage	25.40%			25.40%
Collateralized loan obligations \| FL5 Securities
Debt Instrument [Line Items]
Loans held for investment, aggregate unpaid principal balance percentage	23.50%			23.50%
Collateral Assets \| Collateralized loan obligations \| SOFR
Debt Instrument [Line Items]
Collateral (loans), outstanding principal	$ 2,714,109			$ 2,714,109
Collateral (loans), carrying value	2,471,666			2,471,666
Collateral Assets \| Collateralized loan obligations \| LIBOR
Debt Instrument [Line Items]
Collateral (loans), outstanding principal						$ 3,032,456
Collateral (loans), carrying value						2,777,061
Collateral Assets \| Collateralized loan obligations \| FL2-Notes \| LIBOR
Debt Instrument [Line Items]
Collateral (loans), outstanding principal						707,456
Collateral (loans), carrying value						508,507
Collateral Assets \| Collateralized loan obligations \| TRTX 2019-FL3 \| SOFR
Debt Instrument [Line Items]
Collateral (loans), outstanding principal	477,957			477,957
Collateral (loans), carrying value	387,154			387,154
Collateral Assets \| Collateralized loan obligations \| TRTX 2019-FL3 \| LIBOR
Debt Instrument [Line Items]
Collateral (loans), outstanding principal						1,250,000
Collateral (loans), carrying value						1,210,550
Collateral Assets \| Collateralized loan obligations \| TRTX 2021-FL4 \| SOFR
Debt Instrument [Line Items]
Collateral (loans), outstanding principal	1,161,152			1,161,152
Collateral (loans), carrying value	1,038,119			1,038,119
Collateralized loan obligations \| Collateralized loan obligations \| TRTX 2021-FL4 \| LIBOR
Debt Instrument [Line Items]
Collateral (loans), outstanding principal						1,075,000
Collateral (loans), carrying value						$ 1,058,004
Collateralized loan obligations \| Collateralized loan obligations \| TRTX 2022-FL5 \| SOFR
Debt Instrument [Line Items]
Collateral (loans), outstanding principal	1,075,000			1,075,000
Collateral (loans), carrying value	$ 1,046,393			$ 1,046,393