Summary of Significant Accounting Policies - Additional Information (Details) loan in Thousands, $ in Thousands				6 Months Ended	13 Months Ended
		Jun. 16, 2021 shares	Jun. 14, 2021 shares	Jun. 30, 2022 USD ($) loan shares	Jun. 30, 2022 USD ($) shares	Dec. 31, 2021 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				17,300	17,300	15,000
Cash and cash equivalents	[1]			355,994	355,994	260,635
Restricted cash	[1]			789	789	$ 404
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 B Preferred Stock
Significant Accounting Policies [Line Items]
Temporary equity, shares redeemed | shares		9,000,000
Temporary equity, shares outstanding | shares				0	0	0
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	0

[1] The Company’s consolidated Total Assets and Total Liabilities as of June 30, 2022 include assets and liabilities of variable interest entities (“VIEs”) of $3.2 billion and $2.6 billion, respectively. The Company’s consolidated Total Assets and Total Liabilities as of December 31, 2021 include assets and liabilities of VIEs of $3.2 billion and $2.6 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.