Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Total Starwood Property Trust, Inc. Stockholders' Equity	Common stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Non-Controlling Interests	Total
Balance at Dec. 31, 2014	$ 3,860,856	$ 2,248	$ 3,835,725	$ (23,635)	$ (9,378)	$ 55,896	$ 22,056	$ 3,882,912
Balance (in shares) at Dec. 31, 2014		224,752,053		1,213,750
Increase (Decrease) in Stockholders' Equity
Proceeds from DRIP Plan	55		55					55
Proceeds from DRIP Plan (in shares)		2,303
Equity component of 4.0% Convertible Senior Notes repurchase	(15,669)		(15,669)					(15,669)
Share-based compensation	7,491	$ 4	7,487					7,491
Share-based compensation (in shares)		408,763
Manager incentive fee paid in stock	9,445	$ 3	9,442					9,445
Manager incentive fee paid in stock (in shares)		387,299
Net income	120,363				120,363		416	120,779
Dividends declared, $0.48 per share	(108,435)				(108,435)			(108,435)
Other comprehensive loss, net	(16,534)					(16,534)		(16,534)
VIE non-controlling interests							431	431
Distribution to non-controlling interests							(359)	(359)
Balance at Mar. 31, 2015	3,857,572	$ 2,255	3,837,040	$ (23,635)	2,550	39,362	22,544	3,880,116
Balance (in shares) at Mar. 31, 2015		225,550,418		1,213,750
Balance at Dec. 31, 2015	4,140,316	$ 2,410	4,192,844	$ (72,381)	(12,286)	29,729	30,627	$ 4,170,943
Balance (in shares) at Dec. 31, 2015		241,044,775		3,553,996				241,044,775
Increase (Decrease) in Stockholders' Equity
Proceeds from ATM Agreement (in shares)								0
Proceeds from DRIP Plan	82		82					$ 82
Proceeds from DRIP Plan (in shares)		4,411
Common stock repurchased	(19,723)			$ (19,723)				$ (19,723)
Common stock repurchased (in shares)				1,052,889				1,052,889
Share-based compensation	7,067	$ 6	7,061					$ 7,067
Share-based compensation (in shares)		563,503
Manager incentive fee paid in stock	10,923	$ 6	10,917					10,923
Manager incentive fee paid in stock (in shares)		606,166
Net income	26,657				26,657		389	27,046
Dividends declared, $0.48 per share	(114,572)				(114,572)			(114,572)
Other comprehensive loss, net	3,728					3,728		3,728
VIE non-controlling interests							(633)	(633)
Contributions from non-controlling interests							6,584	6,584
Distribution to non-controlling interests							(582)	(582)
Balance at Mar. 31, 2016	$ 4,054,478	$ 2,422	$ 4,210,904	$ (92,104)	$ (100,201)	$ 33,457	$ 36,385	$ 4,090,863
Balance (in shares) at Mar. 31, 2016		242,218,855		4,606,885				242,218,855