Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 126,384	$ 152,961	$ 248,910	$ 86,692
Other comprehensive (loss) income (net change by component):
Available-for-sale securities	(344)	6,982	(2,747)	(8,066)
Foreign currency translation	0	0	64	0
Other comprehensive (loss) income	(344)	6,982	(2,683)	(8,066)
Comprehensive income	126,040	159,943	246,227	78,626
Less: Comprehensive income attributable to non-controlling interests	(10,074)	(13,305)	(21,222)	(13,805)
Comprehensive income attributable to Starwood Property Trust, Inc.	$ 115,966	$ 146,638	$ 225,005	$ 64,821