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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	[1]			$ 41,999
Allowance for credit losses for loans held for investment	[1]	$ 84,156		84,156
Total allowance for credit losses		93,383	$ 55,312	93,383	$ 55,312
Loans held for investment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		46,307	56,641	41,999	59,940
Allowance for (reversal of) credit losses, net		37,849	(4,700)	42,157	(7,999)
Allowance for credit losses for loans held for investment		84,156	51,941	84,156	51,941
Unfunded Loan Commitment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		4,786	2,149	4,210	2,888
Allowance for (reversal of) credit losses, net		4,441	1,222	5,017	483
Allowance for credit losses on unfunded loan commitments		9,227	3,371	9,227	3,371
Senior loans
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses		92,712	54,791	92,712	54,791
Senior loans | Loans held for investment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		45,940	55,155	41,193	58,210
Allowance for (reversal of) credit losses, net		37,545	(3,724)	42,292	(6,779)
Allowance for credit losses for loans held for investment		83,485	51,431	83,485	51,431
Senior loans | Unfunded Loan Commitment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		4,786	2,084	4,210	2,756
Allowance for (reversal of) credit losses, net		4,441	1,276	5,017	604
Allowance for credit losses on unfunded loan commitments		9,227	3,360	9,227	3,360
Subordinated and mezzanine loans
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Total allowance for credit losses		671	521	671	521
Subordinated and mezzanine loans | Loans held for investment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		367	1,486	806	1,730
Allowance for (reversal of) credit losses, net		304	(976)	(135)	(1,220)
Allowance for credit losses for loans held for investment		671	510	671	510
Subordinated and mezzanine loans | Unfunded Loan Commitment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		0	65	0	132
Allowance for (reversal of) credit losses, net		0	(54)	0	(121)
Allowance for credit losses on unfunded loan commitments		$ 0	$ 11	$ 0	$ 11

[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.