Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income from loans and other investments
Interest and related income	$ 53,164	$ 34,939	$ 117,161
Less: Interest and related expenses	18,017	38,138	96,974
Income (loss) from loans and other investments, net	35,147	(3,199)	20,187
Other expenses
Management fees	5,937
General and administrative expenses	11,505	10,369	8,982
Total other expenses	17,442	10,369	8,982
Total other-than-temporary impairments of securities			(49,309)
Portion of other-than-temporary impairments of securities recognized in other comprehensive income		(160)	1,243
Impairment of real estate held-for-sale			(1,055)
Net impairments recognized in earnings		(160)	(49,121)
Recovery of provision for loan losses		36,147	19,326
Valuation allowance on loans held-for-sale	1,259		(1,456)
Gain on investments at fair value	7,417
Fair value adjustment on investment in CT Legacy Asset		51,904
Gain on deconsolidation of subsidiary		200,283
Gain on sale of investments		6,000
Gain on extinguishment of debt	38		271,031
Income from equity investments in unconsolidated subsidiaries		1,781	3,649
Income before income taxes	26,419	282,387	254,634
Income tax provision	995	174	1,425
Income from continuing operations	25,424	282,213	253,209
Loss from discontinued operations, net of tax		(2,138)	(890)
Loss on sale of discontinued operations		(271)
Net income	25,424	279,804	252,319
Net (income) loss attributable to non-controlling interests	(10,392)	(98,780)	5,823
Net income attributable to Blackstone Mortgage Trust, Inc.	$ 15,032	$ 181,024	$ 258,142
Income from continuing operations per share of common stock
Basic	$ 0.81	$ 78.19	$ 114.31
Diluted	$ 0.81	$ 74.16	$ 108.17
Loss from discontinued operations per share of common stock
Basic		$ (1.03)	$ (0.39)
Diluted		$ (1.03)	$ (0.39)
Net income per share of common stock
Basic	$ 0.81	$ 77.16	$ 113.92
Diluted	$ 0.81	$ 73.13	$ 107.78
Weighted-average shares of common stock outstanding
Basic	18,520,052	2,345,943	2,266,043
Diluted	18,520,052	2,475,294	2,395,043