Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income from loans and other investments
Interest and related income	$ 126,825	$ 130,471	$ 245,341	$ 253,496
Less: Interest and related expenses	54,352	49,065	101,026	94,446
Income from loans and other investments, net	72,473	81,406	144,315	159,050
Other expenses
Management and incentive fees	14,393	15,847	27,314	29,460
General and administrative expenses	7,373	6,781	14,800	13,576
Total other expenses	21,766	22,628	42,114	43,036
Gain on investments at fair value		10,524		10,589
(Loss) income from equity investment in unconsolidated subsidiary		(6)		133
Income before income taxes	50,707	69,296	102,201	126,736
Income tax provision (benefit)	94	(154)	183	87
Net income	50,613	69,450	102,018	126,649
Net income attributable to non-controlling interests		(6,369)		(6,521)
Net income attributable to Blackstone Mortgage Trust, Inc.	$ 50,613	$ 63,081	$ 102,018	$ 120,128
Net income per share of common stock basic and diluted	$ 0.53	$ 0.67	$ 1.07	$ 1.28
Weighted-average shares of common stock outstanding, basic and diluted	95,005,873	94,064,423	94,999,664	94,066,096
Dividends declared per share of common stock	$ 0.62	$ 0.62	$ 1.24	$ 1.24