Loans Held for Investment and the Allowance for Credit Losses - Summary of Activity in Allowance for Credit Losses for Loans Held for Investment Portfolio by Class of Financing Receivable (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022	Dec. 31, 2022
Allowance for credit losses for loans held for investment:
Beginning balance, allowance for credit loss	[1]				$ 197,272
Allowance for credit losses, net		$ 89,069		$ 42,290	96,853		$ 47,174
Ending balance, allowance for credit loss		250,244	[1]	93,400	250,244	[1]	93,400
Allowance for credit losses on unfunded loan commitments:
Beginning balance, allowance for credit loss					17,314
Ending balance, allowance for credit loss		28,041			28,041
Total allowance for credit losses		278,285		93,383	278,285		93,383	$ 214,586
Total unpaid principal balance		4,567,250			4,567,250			5,004,798
Senior loans
Allowance for credit losses on unfunded loan commitments:
Total allowance for credit losses		278,285		92,712	278,285		92,712
Subordinated and mezzanine loans
Allowance for credit losses on unfunded loan commitments:
Total allowance for credit losses		0		671	0		671
General reserve
Allowance for credit losses for loans held for investment:
Beginning balance, allowance for credit loss					119,190
Ending balance, allowance for credit loss		93,830			93,830
Allowance for credit losses on unfunded loan commitments:
Beginning balance, allowance for credit loss					10,927
Ending balance, allowance for credit loss		8,287			8,287
Total allowance for credit losses		102,117			102,117			130,117
Total unpaid principal balance		4,074,992			4,074,992			4,759,663
Specific reserve
Allowance for credit losses for loans held for investment:
Beginning balance, allowance for credit loss					78,082
Ending balance, allowance for credit loss		156,414			156,414
Allowance for credit losses on unfunded loan commitments:
Beginning balance, allowance for credit loss					6,387
Ending balance, allowance for credit loss		19,754			19,754
Total allowance for credit losses		176,168			176,168			84,469
Total unpaid principal balance		492,258			492,258			$ 245,135
Loans held for investment
Allowance for credit losses for loans held for investment:
Beginning balance, allowance for credit loss		201,508		46,307	197,272		41,999
Allowance for credit losses, net		48,736		37,849	52,972		42,157
Ending balance, allowance for credit loss		250,244		84,156	250,244		84,156
Loans held for investment | Senior loans
Allowance for credit losses for loans held for investment:
Beginning balance, allowance for credit loss		201,508		45,940	197,272		41,193
Allowance for credit losses, net		48,736		37,545	52,972		42,292
Ending balance, allowance for credit loss		250,244		83,485	250,244		83,485
Loans held for investment | Subordinated and mezzanine loans
Allowance for credit losses for loans held for investment:
Beginning balance, allowance for credit loss		0		367	0		806
Allowance for credit losses, net		0		304	0		(135)
Ending balance, allowance for credit loss		0		671	0		671
Unfunded loan commitments
Allowance for credit losses on unfunded loan commitments:
Beginning balance, allowance for credit loss		20,862		4,786	17,314		4,210
Allowance for credit losses, net		7,179		4,441	10,727		5,017
Ending balance, allowance for credit loss		28,041		9,227	28,041		9,227
Unfunded loan commitments | Senior loans
Allowance for credit losses on unfunded loan commitments:
Beginning balance, allowance for credit loss		20,862		4,786	17,314		4,210
Allowance for credit losses, net		7,179		4,441	10,727		5,017
Ending balance, allowance for credit loss		28,041		9,227	28,041		9,227
Unfunded loan commitments | Subordinated and mezzanine loans
Allowance for credit losses on unfunded loan commitments:
Beginning balance, allowance for credit loss		0		0	0		0
Allowance for credit losses, net		0		0	0		0
Ending balance, allowance for credit loss		$ 0		$ 0	$ 0		$ 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.