Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Total Starwood Property Trust, Inc. Stockholders’ Equity	Total Starwood Property Trust, Inc. Stockholders’ Equity Cumulative Effect, Period of Adoption, Adjustment	Common stock	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock​	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income	Non- Controlling Interests
Beginning Balance at Dec. 31, 2020	$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	748
Contributions from non-controlling interests	214,167
Ending Balance at Dec. 31, 2021	214,915
Beginning balance (in shares) at Dec. 31, 2020					292,091,601
Beginning balance at Dec. 31, 2020	4,862,576	$ (1,536)	$ 4,488,898	$ (1,536)	$ 2,921	$ 5,209,739	$ (3,755)	$ (138,022)	$ (629,733)	$ 2,219	$ 43,993	$ 373,678
Beginning balance (in shares) at Dec. 31, 2020								7,448,691
Increase (Decrease) in Stockholders' Equity
Cumulative effect of investment company fair value adjustment	1,236,476		1,236,476						1,236,476
Proceeds from public offering of common stock and ATM Agreement (in shares)					16,000,000
Proceeds from public offering of common stock and ATM Agreement	393,120		393,120		$ 160	392,960
Proceeds from DRIP Plan (in shares)					39,957
Proceeds from DRIP Plan	966		966			966
Redemption of Class A Units (in shares)					853,681
Redemption of Class A Units	0		17,738		$ 9	17,729						(17,738)
Equity offering costs	(720)		(720)			(720)
Share-based compensation (in shares)					2,568,525
Share-based compensation	39,287		39,287		$ 26	39,261
Manager fee paid in stock (in shares)					715,180
Manager fees paid in stock	17,040		17,040		$ 7	17,033
Net income	491,678		447,739						447,739			43,939
Dividends declared	(563,595)		(563,595)						(563,595)
Other comprehensive loss, net	(3,040)		(3,040)								(3,040)
Contributions from non-controlling interests	5,590											5,590
Distributions to non-controlling interests	(43,950)		163			163						(44,113)
Ending balance (in shares) at Dec. 31, 2021					312,268,944
Ending balance at Dec. 31, 2021	6,433,892		6,072,536		$ 3,123	5,673,376		$ (138,022)	493,106		40,953	361,356
Ending balance (in shares) at Dec. 31, 2021								7,448,691
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	153,820
Distributions to non-controlling interests	(5,945)
Ending Balance at Dec. 31, 2022	362,790
Increase (Decrease) in Stockholders' Equity
Proceeds from public offering of common stock and ATM Agreement (in shares)					2,168,710
Proceeds from public offering of common stock and ATM Agreement	49,263		49,263		$ 22	49,241
Proceeds from DRIP Plan (in shares)					48,357
Proceeds from DRIP Plan	1,073		1,073			1,073
Proceeds from employee stock purchase plan (in shares)					67,965
Proceeds from employee stock purchase plan	1,181		1,181		$ 1	1,180
Equity offering costs	(1,074)		(1,074)			(1,074)
Share-based compensation (in shares)					1,724,165
Share-based compensation	40,185		40,185		$ 17	40,168
Manager fee paid in stock (in shares)					1,845,720
Manager fees paid in stock	43,141		43,141		$ 18	43,123
Net income	905,241		871,475						871,475			33,766
Dividends declared	(595,344)		(595,344)						(595,344)
Other comprehensive loss, net	(19,998)		(19,998)								(19,998)
Contributions from non-controlling interests	21,925											21,925
Distributions to non-controlling interests	$ (43,568)											(43,568)
Ending balance (in shares) at Dec. 31, 2022	310,675,170				318,123,861
Ending balance at Dec. 31, 2022	$ 6,835,917		6,462,438		$ 3,181	5,807,087		$ (138,022)	769,237		20,955	373,479
Ending balance (in shares) at Dec. 31, 2022	7,448,691							7,448,691
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	$ 58,410
Distributions to non-controlling interests	(6,852)
Ending Balance at Dec. 31, 2023	414,348
Increase (Decrease) in Stockholders' Equity
Proceeds from DRIP Plan (in shares)					57,492
Proceeds from DRIP Plan	1,091		1,091		$ 1	1,090
Redemption of Class A Units	0		43			43						(43)
Proceeds from employee stock purchase plan (in shares)					123,327
Proceeds from employee stock purchase plan	1,906		1,906		$ 1	1,905
Share-based compensation (in shares)					1,667,034
Share-based compensation	39,247		39,247		$ 17	39,230
Manager fee paid in stock (in shares)					843,051
Manager fees paid in stock	15,323		15,323		$ 8	15,315
Net income	359,747		339,213						339,213			20,534
Dividends declared	(602,569)		(602,569)						(602,569)
Other comprehensive loss, net	(5,603)		(5,603)								(5,603)
Contributions from non-controlling interests	2,724											2,724
Distributions to non-controlling interests	$ (39,149)											(39,149)
Ending balance (in shares) at Dec. 31, 2023	313,366,074				320,814,765
Ending balance at Dec. 31, 2023	$ 6,608,634		$ 6,251,089		$ 3,208	$ 5,864,670		$ (138,022)	$ 505,881		$ 15,352	$ 357,545
Ending balance (in shares) at Dec. 31, 2023	7,448,691							7,448,691