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 public offering of common stock	326,142	$ 138	326,004					326,142
Proceeds from public offering of common stock (in shares)		13,800,000
Proceeds from DRIP Plan	154		154					154
Proceeds from DRIP Plan (in shares)		6,404
Equity offering costs	(892)		(892)					(892)
Common stock repurchased	(8,829)			$ (8,829)				(8,829)
Common stock repurchased (in shares)				400,000
Equity component of 4.0% Convertible Senior Notes repurchase	(17,727)		(17,727)					(17,727)
Share-based compensation	17,882	$ 11	17,871					17,882
Share-based compensation (in shares)		1,112,157
Manager incentive fee paid in stock	12,739	$ 5	12,734					12,739
Manager incentive fee paid in stock (in shares)		523,560
Net income	237,511				237,511		908	238,419
Dividends declared, $0.96 per share	(224,010)				(224,010)			(224,010)
Other comprehensive loss, net	(9,995)					(9,995)		(9,995)
VIE non-controlling interests							1,045	1,045
Contributions from non-controlling interests							2,077	2,077
Distribution to non-controlling interests							(792)	(792)
Balance at Jun. 30, 2015	4,193,831	$ 2,402	4,173,869	$ (32,464)	4,123	45,901	25,294	4,219,125
Balance (in shares) at Jun. 30, 2015		240,194,174		1,613,750
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	177		177					$ 177
Proceeds from DRIP Plan (in shares)		9,163
Common stock repurchased	(19,723)			$ (19,723)				$ (19,723)
Common stock repurchased (in shares)				1,052,889				1,052,889
Share-based compensation	14,660	$ 9	14,651					$ 14,660
Share-based compensation (in shares)		876,674
Manager incentive fee paid in stock	13,223	$ 8	13,215					13,223
Manager incentive fee paid in stock (in shares)		723,249
Net income	138,130				138,130		987	139,117
Dividends declared, $0.96 per share	(229,217)				(229,217)			(229,217)
Other comprehensive loss, net	2,898					2,898		2,898
VIE non-controlling interests							(52)	(52)
Contributions from non-controlling interests							10,417	10,417
Distribution to non-controlling interests							(2,350)	(2,350)
Balance at Jun. 30, 2016	$ 4,060,464	$ 2,427	$ 4,220,887	$ (92,104)	$ (103,373)	$ 32,627	$ 39,629	$ 4,100,093
Balance (in shares) at Jun. 30, 2016		242,653,861		4,606,885				242,653,861