Stockholders' Equity - Additional Information (Details)							3 Months Ended					6 Months Ended			13 Months Ended
	Jun. 14, 2022 USD ($) $ / shares	Jun. 13, 2022 USD ($) $ / shares	Jun. 09, 2022 USD ($) $ / shares	Jun. 16, 2021 USD ($) shares	Jun. 14, 2021 USD ($) shares	May 28, 2020 USD ($) tranche $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares		Mar. 31, 2022 shares	Jun. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($) shares	Jun. 30, 2022 USD ($) $ / shares shares		Jun. 30, 2021 USD ($) shares	Jun. 30, 2022 USD ($) $ / shares shares		Dec. 31, 2021 USD ($) shares
Class Of Stock [Line Items]
Proceeds from issuance of Series C Cumulative Redeemable Preferred Stock												$ 0		$ 201,250,000
Number of tranches | tranche						3
Accretion of remaining unamortized discount										$ 23,997,000	$ 1,452,000
Common stock, shares outstanding | shares							77,403,381					77,403,381			77,403,381		77,183,892
Dividends paid in cash	$ 15,500,000	$ 18,700,000
Unpaid dividends							$ 18,726,000	[1]		$ 15,500,000		$ 18,726,000	[1]	$ 15,500,000	$ 18,726,000	[1]	$ 24,156,000	[1]
Warrants
Class Of Stock [Line Items]
Warrants to purchase common stock						$ 225,000,000
Strike price of common share for warrants outstanding (in USD per share) | $ / shares						$ 7.50
Warrants expiration date						May 28, 2025
Fair value of warrants						$ 14,400,000
Warrants exercised (in shares) | shares												0			0
Common Stock
Class Of Stock [Line Items]
Number of common shares issued | shares							217,536		1,953	192,023	110,096
Dividend payable (in USD per share) | $ / shares	$ 0.20	$ 0.24
Maximum
Class Of Stock [Line Items]
Taxable income distribution percentage												90.00%
PE Holder L.L.C | Investment Agreement | Tranche One
Class Of Stock [Line Items]
Warrants to purchase common stock						$ 225,000,000
PE Holder L.L.C | Investment Agreement | Maximum
Class Of Stock [Line Items]
Warrants to purchase common stock, authorized (in shares) | shares						15,000,000
Aggregate cash purchase price						$ 325,000,000
PE Holder L.L.C | Investment Agreement | Maximum | Tranche One
Class Of Stock [Line Items]
Warrants to purchase common stock (in shares) | shares						12,000,000
Equity Distribution Agreement | Common Stock
Class Of Stock [Line Items]
Number of common shares issued | shares							0			0		0		0
Gross proceeds from issuance of common stock												$ 50,900,000
Aggregate gross sales price of common stock							$ 74,100,000					$ 74,100,000			$ 74,100,000
Equity Distribution Agreement | Maximum | Common Stock
Class Of Stock [Line Items]
Percentage of commission to each sales agent, on gross sales price of shares sold												1.75%
Series C Preferred Stock
Class Of Stock [Line Items]
Proceeds from issuance of Series C Cumulative Redeemable Preferred Stock					$ 194,400,000
Number of common shares issued | shares					8,050,000
Underwriting discount and commissions					$ 6,300,000
Issuance costs					$ 600,000
Liquidation preference (in USD per share) | $ / shares							$ 25.00					$ 25.00			$ 25.00
Dividend percentage												6.25%
Liquidation preference (in USD per share annually) | $ / shares												$ 1.5624
Liquidation preference (in USD per share quarterly) | $ / shares												0.3906
Dividend payable (in USD per share) | $ / shares			$ 0.3906				0.4601					0.4601			0.4601
Redemption price (in USD per share) | $ / shares							$ 25.00					$ 25.00			$ 25.00
Dividend rate (in percent)					6.25%
Preferred stock, liquidation preference per annum							$ 201,250,000					$ 201,250,000			$ 201,250,000		$ 201,250,000
Dividends paid in cash			$ 3,100,000
Dividends												$ 6,300,000
Series C Preferred Stock | TPG Capital BD, LLC
Class Of Stock [Line Items]
Payments for underwriting expense					$ 700,000
Series C Preferred Stock | Change of Control Event
Class Of Stock [Line Items]
Redemption price (in USD per share) | $ / shares							$ 25.00					$ 25.00			$ 25.00
Series B Preferred Stock
Class Of Stock [Line Items]
Liquidation preference (in USD per share) | $ / shares							$ 25.00					$ 25.00			$ 25.00
Dividend percentage						11.00%						11.00%
Dividend payable (in USD per share) | $ / shares	$ 0.69
Outstanding shares redeemed (in shares) | shares				9,000,000
Cash redemption of series B preferred stock				$ 247,500,000
Temporary equity, shares outstanding | shares							0					0			0		0
Dividends paid in cash	$ 6,200,000
Dividends														$ 12,300,000
Series B Preferred Stock | Warrants
Class Of Stock [Line Items]
Fair value of warrants						$ 14,400,000
Issuance costs						$ 14,200,000
Series B Preferred Stock | Maximum
Class Of Stock [Line Items]
Liquidation preference (in percent)						2.00%
Series B Preferred Stock | PE Holder L.L.C | Investment Agreement
Class Of Stock [Line Items]
Dividend percentage						11.00%
Shares authorized to issue and sell | shares						13,000,000
Par value (in USD per share) | $ / shares						$ 0.001
Series B Preferred Stock | PE Holder L.L.C | Investment Agreement | Tranche One
Class Of Stock [Line Items]
Shares issued | shares						9,000,000
Series A Preferred Stock
Class Of Stock [Line Items]
Dividend rate (in percent)												12.50%
Preferred stock, liquidation preference per annum | $ / shares							$ 0.001					$ 0.001			$ 0.001
Preferred stock, liquidation preference per annum							$ 125,000					$ 125,000			$ 125,000		$ 125,000
Class A Common Stock
Class Of Stock [Line Items]
Dividends												$ 37,400,000		$ 31,000,000

[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.