Loans Held for Investment and the Allowance for Credit Losses - Schedule of Overall Statistics for Loan Held for Investment Portfolio (Details) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan
Loans And Leases Receivable Disclosure [Line Items]
Total loan commitment		$ 5,186,472	$ 5,411,944
Unpaid principal balance		4,710,161	4,919,343
Unfunded loan commitments		470,869	487,773
Loans held for investment	[1]	$ 4,701,410	$ 4,909,202
Number of non-consolidated senior interest | loan		1	1
Non-consolidated senior interest outstanding		$ 132,000	$ 132,000
PIK interest		$ 2,400	$ 3,000
Percentage of loans subject to yield maintenance or other prepayment restrictions		43.30%
Percentage of loans open to repayment by borrower without penalty		56.70%
SOFR
Loans And Leases Receivable Disclosure [Line Items]
Total loan commitment		$ 600,000
Percentage of loan commitment subject to benchmark interest rate		11.80%
LIBOR
Loans And Leases Receivable Disclosure [Line Items]
Total loan commitment		$ 4,600,000
Percentage of loan commitment subject to benchmark interest rate		88.20%
Balance sheet portfolio
Loans And Leases Receivable Disclosure [Line Items]
Number of loans | loan		73	69
Floating rate loans (in percent)		100.00%	100.00%
Total loan commitment		$ 5,186,472	$ 5,411,944
Unpaid principal balance		4,710,161	4,919,343
Unfunded loan commitments		470,869	487,773
Loans held for investment		$ 4,701,410	$ 4,909,202
Weighted average credit spread (in percent)		3.40%	3.40%
Weighted average all-in yield (in percent)		5.60%	4.80%
Weighted average term to extended maturity (in years)		2 years 8 months 12 days	2 years 9 months 18 days
Total loan exposure
Loans And Leases Receivable Disclosure [Line Items]
Number of loans | loan		74	70
Floating rate loans (in percent)		100.00%	100.00%
Total loan commitment		$ 5,318,472	$ 5,543,944
Unpaid principal balance		4,842,161	5,051,343
Unfunded loan commitments		470,869	487,773
Loans held for investment		$ 4,701,410	$ 4,909,202
Weighted average credit spread (in percent)		3.50%	3.40%
Weighted average all-in yield (in percent)		5.60%	4.80%
Weighted average term to extended maturity (in years)		2 years 9 months 18 days	2 years 9 months 18 days

[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.