Loans Held for Investment and the Allowance for Credit Losses - Schedule of Overall Statistics for Loan Held for Investment Portfolio (Details) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of loans | loan		63	70
Floating rate loans		100.00%	100.00%
Total loan commitment		$ 4,869,045	$ 5,429,146
Unpaid principal balance		4,567,250	5,004,798
Unfunded loan commitments		300,502	426,061
Loans held for investment	[1]	$ 4,547,594	$ 4,978,674
Weighted average credit spread		3.60%	3.40%
Weighted average all-in yield (in percent)		8.90%	8.10%
Weighted average term to extended maturity (in years)		2 years 6 months	2 years 9 months 18 days
Number of non-consolidated senior interest | loan		0	0
PIK interest		$ 1,200	$ 1,700
Percentage of loans subject to yield maintenance or other prepayment restrictions		19.80%
Percentage of loans open to repayment by borrower without penalty		80.20%
Subordinated and mezzanine loans
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of loans | loan		63
Floating rate loans		100.00%
Total loan commitment		$ 4,869,045
Unpaid principal balance		4,567,250
Unfunded loan commitments		300,502
Loans held for investment		$ 4,547,594
Weighted average credit spread		3.60%
Weighted average all-in yield (in percent)		8.90%
Weighted average term to extended maturity (in years)		2 years 6 months
Subordinated and mezzanine loans | SOFR
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Number of loans | loan		59
Total loan commitment		$ 4,400,000

[1] The Company’s consolidated Total Assets and Total Liabilities as of June 30, 2023 include assets and liabilities of variable interest entities (“VIEs”) of $2.8 billion and $2.1 billion, respectively. The Company’s consolidated Total Assets and Total Liabilities as of December 31, 2022 include assets and liabilities of VIEs of $3.3 billion and $2.5 billion, respectively. These assets can be used only to satisfy obligations of the VIEs, and creditors of the VIEs have recourse only to these assets, and not to TPG RE Finance Trust, Inc. See Note 5 to the Consolidated Financial Statements for details.(2)Includes $28.0 million and $17.3 million of reserve for expected losses for unfunded loan commitments as of June 30, 2023 and December 31, 2022, respectively.