Commercial Mortgage-Backed Securities - Available-for-Sale Commercial Mortgage-Backed Securities (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Estimated Fair Value	[1]	$ 85,895	$ 61,504
Commercial Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Face Amount		85,661	62,927
Unamortized Premium (Discount)		268	(2,673)
Gross Unrealized (Loss)		(34)
Gross Unrealized Gain			1,250
Estimated Fair Value		$ 85,895	$ 61,504

[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 December 31, 2016 include VIE assets and liabilities of $743.5 million and $542.8 million, respectively. These assets were available only to satisfy obligations of the VIE, and creditors of the VIE had recourse only to those assets, and not to TPG RE Finance Trust, Inc. See Note 5 to the Consolidated Financial Statements for details