Variable Interest Entities and Collateralized Loan Obligation - Schedule of Borrowings and Corresponding Collateral (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Collateral (loans), Outstanding Principal		$ 3,237,096	$ 3,192,866
Debt, Face Value		(3,610,303)	$ (3,376,158)
Debt, Carrying Value	[1]	(735,415)
Collateralized Loan Obligation
Debt Instrument [Line Items]
Collateral (loans), Outstanding Principal		932,380
Collateral (loans), Carrying Value		932,380
Debt, Face Value		(745,904)
Debt, Carrying Value		$ (740,415)

[1] At December 31, 2017, there were no VIE assets or liabilities recorded in the Company’s Total Assets and Total Liabilities. The Company’s consolidated Total Assets and Total Liabilities at September 30, 2018 include VIE assets and liabilities of $954.4 million and $741.5 million, respectively. These assets can be used only to satisfy obligations of the VIE, and creditors of the VIE have recourse only to these assets, and not to TPG RE Finance Trust, Inc. See Note 5 to the Consolidated Financial Statements for details