Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net loss	$ (351)	$ (123,170)
Other comprehensive income
Unrealized gain (loss) on foreign currency translation	60,901	(45,732)
Realized and unrealized (loss) gain on derivative financial instruments	(60,394)	46,148
Unrealized loss on derivative financial instruments from unconsolidated entities	(184)	0
Other comprehensive income	323	416
Comprehensive loss	(28)	(122,754)
Comprehensive income attributable to non-controlling interests	(6)	(668)
Comprehensive loss attributable to Blackstone Mortgage Trust, Inc.	$ (34)	$ (123,422)