Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 140,487	$ 164,734	$ 389,397	$ 251,426
Other comprehensive (loss) income (net change by component):
Available-for-sale securities	(824)	(581)	(3,571)	(8,647)
Foreign currency translation	0	0	64	0
Other comprehensive loss	(824)	(581)	(3,507)	(8,647)
Comprehensive income	139,663	164,153	385,890	242,779
Less: Comprehensive income attributable to non-controlling interests	(11,885)	(12,900)	(33,107)	(26,705)
Comprehensive income attributable to Starwood Property Trust, Inc.	$ 127,778	$ 151,253	$ 352,783	$ 216,074