Condensed Consolidated Statements of Equity (Unaudited) - 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, 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			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
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			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
Beginning balance at Dec. 31, 2023	414,348
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	1,565
Distributions to non-controlling interests	(428)
Ending balance at Mar. 31, 2024	$ 415,485
Beginning balance (in shares) at Dec. 31, 2023	313,366,074		320,814,765
Beginning balance at Dec. 31, 2023	$ 6,608,634	6,251,089	$ 3,208	5,864,670	$ (138,022)	505,881	15,352	357,545
Beginning balance (in shares) at Dec. 31, 2023	7,448,691				7,448,691
Increase (Decrease) in Stockholders' Equity
Proceeds from DRIP Plan (in shares)			13,034
Proceeds from DRIP Plan	$ 266	266		266
Proceeds from employee stock purchase plan (in shares)			66,315
Proceeds from employee stock purchase plan	1,134	1,134	$ 1	1,133
Share-based compensation (in shares)			2,015,172
Share-based compensation	10,046	10,046	$ 20	10,026
Manager fee paid in stock (in shares)			496,170
Manager fees paid in stock	9,762	9,762	$ 5	9,757
Net income	158,295	154,332				154,332		3,963
Dividends declared	(152,591)	(152,591)				(152,591)
Other comprehensive loss, net	(1,291)	(1,291)					(1,291)
Distributions to non-controlling interests	$ (9,559)							(9,559)
Ending balance (in shares) at Mar. 31, 2024	315,956,765		323,405,456
Ending balance at Mar. 31, 2024	$ 6,624,696	$ 6,272,747	$ 3,234	$ 5,885,852	$ (138,022)	$ 507,622	$ 14,061	$ 351,949
Ending balance (in shares) at Mar. 31, 2024	7,448,691				7,448,691