Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income from loans and other investments
Interest and related income	$ 1,338,954	$ 854,690	$ 779,648
Less: Interest and related expenses	710,904	340,223	347,471
Income from loans and other investments, net	628,050	514,467	432,177
Other expenses
Management and incentive fees	110,292	88,467	77,916
General and administrative expenses	52,193	43,168	45,871
Total other expenses	162,485	131,635	123,787
(Increase) decrease in current expected credit loss reserve	(211,505)	39,864	(167,653)
Income before income taxes	254,060	422,696	140,737
Income tax provision	3,003	423	323
Net income	251,057	422,273	140,414
Net income attributable to non-controlling interests	(2,415)	(3,080)	(2,744)
Net income attributable to Blackstone Mortgage Trust, Inc.	$ 248,642	$ 419,193	$ 137,670
Net income attributable to Blackstone Mortgage Trust, Inc., basic (in dollars per share)	$ 1.46	$ 2.77	$ 0.97
Net income attributable to Blackstone Mortgage Trust, Inc., diluted (in dollars per share)	$ 1.46	$ 2.77	$ 0.97
Weighted-average shares of common stock outstanding, basic (in shares)	170,631,410	151,521,941	141,795,977
Weighted-average shares of common stock outstanding, diluted (in shares)	170,631,410	151,521,941	141,795,977