Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Total Starwood Property Trust, Inc. Stockholders’ Equity	Common stock	Additional Paid-in Capital	Treasury Stock​	Retained Earnings	Accumulated Other Comprehensive Income	Non- Controlling Interests
Beginning balance at Dec. 31, 2021	$ 214,915
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	47,720
Distributions to non-controlling interests	(950)
Ending balance at Mar. 31, 2022	261,685
Beginning balance (in shares) at Dec. 31, 2021			312,268,944
Beginning balance at Dec. 31, 2021	6,433,892	$ 6,072,536	$ 3,123	$ 5,673,376	$ (138,022)	$ 493,106	$ 40,953	$ 361,356
Beginning balance (in shares) at Dec. 31, 2021					7,448,691
Increase (Decrease) in Stockholders' Equity
Proceeds from DRIP Plan (in shares)			10,261
Proceeds from DRIP Plan	251	251		251
Equity offering costs	(89)	(89)		(89)
Share-based compensation (in shares)			1,012,963
Share-based compensation	10,093	10,093	$ 10	10,083
Manager fee paid in stock (in shares)			1,068,828
Manager fees paid in stock	25,417	25,417	$ 11	25,406
Net income	336,594	324,599				324,599		11,995
Dividends declared	(147,828)	(147,828)				(147,828)
Other comprehensive loss, net	(5,284)	(5,284)					(5,284)
Contributions from non-controlling interests	4,690							4,690
Distributions to non-controlling interests	(9,768)							(9,768)
Ending balance (in shares) at Mar. 31, 2022			314,360,996
Ending balance at Mar. 31, 2022	6,647,968	6,279,695	$ 3,144	5,709,027	$ (138,022)	669,877	35,669	368,273
Ending balance (in shares) at Mar. 31, 2022					7,448,691
Beginning balance at Dec. 31, 2022	362,790
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	2,287
Distributions to non-controlling interests	(659)
Ending balance at Mar. 31, 2023	$ 364,418
Beginning balance (in shares) at Dec. 31, 2022	310,675,170		318,123,861
Beginning balance at Dec. 31, 2022	$ 6,835,917	6,462,438	$ 3,181	5,807,087	$ (138,022)	769,237	20,955	373,479
Beginning balance (in shares) at Dec. 31, 2022	7,448,691				7,448,691
Increase (Decrease) in Stockholders' Equity
Proceeds from DRIP Plan (in shares)			15,657
Proceeds from DRIP Plan	$ 299	299		299
Proceeds from employee stock purchase plan (in shares)			65,026
Proceeds from employee stock purchase plan	970	970	$ 1	969
Share-based compensation (in shares)			1,091,789
Share-based compensation	10,936	10,936	$ 11	10,925
Manager fee paid in stock (in shares)			373,204
Manager fees paid in stock	7,233	7,233	$ 4	7,229
Net income	57,474	51,974				51,974		5,500
Dividends declared	(150,521)	(150,521)				(150,521)
Other comprehensive loss, net	(1,104)	(1,104)					(1,104)
Distributions to non-controlling interests	$ (8,731)							(8,731)
Ending balance (in shares) at Mar. 31, 2023	312,220,846		319,669,537
Ending balance at Mar. 31, 2023	$ 6,752,473	$ 6,382,225	$ 3,197	$ 5,826,509	$ (138,022)	$ 670,690	$ 19,851	$ 370,248
Ending balance (in shares) at Mar. 31, 2023	7,448,691				7,448,691