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, 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			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
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 income (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			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
Beginning balance at Dec. 31, 2024	426,695
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	425
Distributions to non-controlling interests	(285)
Ending balance at Mar. 31, 2025	$ 426,835
Beginning balance (in shares) at Dec. 31, 2024	337,409,688		344,858,379
Beginning balance at Dec. 31, 2024	$ 6,766,777	6,437,107	$ 3,449	6,322,763	$ (138,022)	235,323	13,594	329,670
Beginning balance (in shares) at Dec. 31, 2024	7,448,691				7,448,691
Increase (Decrease) in Stockholders' Equity
Proceeds from DRIP Plan (in shares)			17,227
Proceeds from DRIP Plan	$ 334	334		334
Proceeds from employee stock purchase plan (in shares)			64,938
Proceeds from employee stock purchase plan	1,100	1,100	$ 1	1,099
Share-based compensation (in shares)			1,565,885
Share-based compensation	13,350	13,350	$ 15	13,335
Manager fee paid in stock (in shares)			318,585
Manager fees paid in stock	6,365	6,365	$ 3	6,362
Net income	115,676	112,255				112,255		3,421
Dividends declared	(163,979)	(163,979)				(163,979)
Other comprehensive income (loss), net	(867)	(867)					(867)
Distributions to non-controlling interests	$ (8,840)							(8,840)
Ending balance (in shares) at Mar. 31, 2025	339,376,323		346,825,014
Ending balance at Mar. 31, 2025	$ 6,729,916	$ 6,405,665	$ 3,468	$ 6,343,893	$ (138,022)	$ 183,599	$ 12,727	$ 324,251
Ending balance (in shares) at Mar. 31, 2025	7,448,691				7,448,691