Related Party Transactions - Additional Information (Details) - USD ($)				3 Months Ended		6 Months Ended
		Jun. 16, 2021	Jul. 25, 2017	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Incentive management fee percentage of Core Earnings less seven percent of stockholders equity			20.00%
Management fees and incentive management fees payable	[1]			$ 5,738,000		$ 5,738,000		$ 5,570,000
Termination fee, description						A termination fee would be due to the Manager upon termination of the Management Agreement by the Company absent a cause event. The termination fee would also be payable to the Manager upon termination of the Management Agreement by the Manager if the Company materially breaches the Management Agreement. The termination fee is equal to three times the sum of (x) the average annual base management fee and (y) the average annual incentive compensation earned by the Manager, in each case during the 24-month period immediately preceding the most recently completed calendar quarter prior to the date of termination
Manager
Related Party Transaction [Line Items]
Maximum reimbursable expense per annum						$ 1,000,000.0
Percentage of allocated reimbursable expense of management agreement						20.00%
Payment of reimbursement expense						$ 0
Series B Preferred Stock
Related Party Transaction [Line Items]
Percentage of annual base management fee						0.75%
Decrease in annual base management fee percentage						50.00%
Redemption of Series B preferred stock		9,000,000
Preferred stock shares outstanding		0
Series C Preferred Stock
Related Party Transaction [Line Items]
Preferred stock shares outstanding				8,050,000		8,050,000		0
Series C Preferred Stock | TPG Capital BD, LLC
Related Party Transaction [Line Items]
Payment for underwriting discount and commissions				$ 700,000
Management Agreement
Related Party Transaction [Line Items]
Percentage of annual base management fee			1.50%			1.50%
Percentage of quarterly base management fee			0.375%
Incentive management fee, description						The Manager is also entitled to incentive compensation which is calculated and payable in cash with respect to each calendar quarter in arrears in an amount, not less than zero, equal to the difference between: (1) the product of (a) 20% and (b) the difference between (i) the Company’s Core Earnings for the most recent 12-month period, including the calendar quarter (or part thereof) for which the calculation of incentive compensation is being made (the “applicable period”), and (ii) the product of (A) the Company’s Equity in the most recent 12-month period, including the applicable period, and (B) 7% per annum; and (2) the sum of any incentive compensation paid to the Manager with respect to the first three calendar quarters of the most recent 12-month period. No incentive compensation is payable to the Manager with respect to any calendar quarter unless Core Earnings for the 12 most recently completed calendar quarters is greater than zero. For purposes of calculating the Manager’s incentive compensation, the Management Agreement specifies that equity securities of the Company or any of the Company’s subsidiaries that are entitled to a specified periodic distribution or have other debt characteristics will not constitute equity securities and will not be included in “Equity” for the purpose of calculating incentive compensation. Instead, the aggregate distribution amount that accrues to such equity securities during the calendar quarter of such calculation will be subtracted from Core Earnings, before incentive compensation for purposes of calculating incentive compensation, unless such distribution is otherwise excluded from Core Earnings.
Percentage multiplied by stockholders equity included in incentive management fee			7.00%
Management fees and incentive management fees payable				5,300,000		$ 5,300,000		$ 5,400,000
Incentive management fee				0		0
Management Agreement | Minimum
Related Party Transaction [Line Items]
Management fee payable per annum			$ 250,000
Management fee payable per quarter			$ 62,500
Post-IPO Management Agreement
Related Party Transaction [Line Items]
Amount incurred and reimbursable				300,000	$ 300,000	500,000	$ 500,000
Reimbursable expenses remained outstanding				$ 400,000		$ 400,000		$ 200,000

[1] The Company’s consolidated Total Assets and Total Liabilities as of June 30, 2021 include assets and liabilities of variable interest entities (“VIEs”) of $3.4 billion and $2.8 billion, respectively. The Company’s consolidated Total Assets and Total Liabilities as of December 31, 2020 include assets and liabilities of VIEs of $2.3 billion and $1.8 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 6 to the Consolidated Financial Statements for details