Summary of Significant Accounting Policies - Additional Information (Details) loan in Thousands, $ in Thousands			3 Months Ended	6 Months Ended
		Jun. 14, 2021 shares	Jun. 30, 2023 USD ($) asset shares	Jun. 30, 2023 USD ($) loan shares	Dec. 31, 2022 USD ($) shares
Significant Accounting Policies [Line Items]
Percentage of senior mortgage loan transferred to third-party				100.00%
Maximum insured amount of each cash account			$ 250	$ 250	$ 250
Cash			18,400	18,400	22,400
Restricted cash	[1]		242	242	265
Cash and cash equivalents	[1]		$ 307,445	307,445	$ 254,050
Number of assets that changed interest rate method | asset			59
Total number of assets | asset			63
Holdco
Significant Accounting Policies [Line Items]
Debt covenant, minimum cash balance required			$ 15,000	$ 15,000
Minimum cash reserve percentage (in percent)			0.05	0.05
Series C Preferred Stock
Significant Accounting Policies [Line Items]
Preferred stock, shares issued | shares		8,050,000	8,050,000	8,050,000	8,050,000
Preferred stock, dividend rate		6.25%
Commercial Real Estate Loans | Maximum
Significant Accounting Policies [Line Items]
Number of performance loan | loan				120
Warrants
Significant Accounting Policies [Line Items]
Warrants exercised (in shares) | shares				0

[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.