Loans Held for Investment and the Allowance for Credit Losses - Schedule of Loans Held for Investment Portfolio by Loan Seniority (Details) - USD ($) $ in Thousands		Jun. 30, 2023		Mar. 31, 2023	Dec. 31, 2022		Jun. 30, 2022
Loans And Leases Receivable Disclosure [Line Items]
Total unpaid principal balance		$ 4,567,250			$ 5,004,798
Amortized cost	[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
Senior loans
Loans And Leases Receivable Disclosure [Line Items]
Total unpaid principal balance		4,567,250			5,004,798
Unamortized premium (discount) and loan origination fees, net		(19,656)			(26,124)
Amortized cost		4,547,594			4,978,674
Allowance for credit losses		(250,244)			(197,272)
Loans held for investment, net		$ 4,297,350		$ 46,000	$ 4,781,402

[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.