Loans Held for Investment and the Allowance for Credit Losses - Summary of Amortized Cost and Results of Internal Risk Rating Review Performed for Loans Held for Investment Portfolio (Details) $ in Thousands		Jun. 30, 2023 USD ($) rating		Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) rating		Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Total	[1]	$ 4,547,594			$ 4,978,674
Allowance for credit losses		(250,244)	[1]		(197,272)	[1]	$ (93,400)
Loans held for investment, net	[1]	$ 4,297,350			4,781,402
Weighted average risk rating | rating		3.2
Loans held for investment
Accounts Notes And Loans Receivable [Line Items]
Total		$ 4,547,594			4,978,674
Allowance for credit losses		(250,244)		$ (201,508)	(197,272)		$ (84,156)	$ (46,307)	$ (41,999)
Loans held for investment, net		$ 4,297,350			$ 4,781,402
Weighted average risk rating | rating		3.2			3.2
1 | Loans held for investment
Accounts Notes And Loans Receivable [Line Items]
Total		$ 0			$ 0
2 | Loans held for investment
Accounts Notes And Loans Receivable [Line Items]
Total		439,713			511,878
3 | Loans held for investment
Accounts Notes And Loans Receivable [Line Items]
Total		3,100,413			3,231,324
4 | Loans held for investment
Accounts Notes And Loans Receivable [Line Items]
Total		515,210			990,337
5 | Loans held for investment
Accounts Notes And Loans Receivable [Line Items]
Total		$ 492,258			$ 245,135

[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.