Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 104,252	$ 51,810
Restricted cash	7,025	11,591
Loans receivable, net	10,131,323	4,428,500
Equity investments in unconsolidated subsidiaries	7,406	10,604
Accrued interest receivable, prepaid expenses, and other assets	216,055	86,016
Total Assets	10,466,061	4,588,521
Liabilities and Equity
Accounts payable, accrued expenses, and other liabilities	83,182	61,013
Secured debt agreements	7,088,738	2,365,336
Loan participations sold	635,581	499,433
Convertible notes, net	163,073	161,853
Total Liabilities	7,970,574	3,087,635
Equity
Additional paid-in capital	3,063,429	2,027,404
Accumulated other comprehensive loss	(19,332)	(15,024)
Accumulated deficit	(561,905)	(547,592)
Total Blackstone Mortgage Trust, Inc. stockholders' equity	2,483,124	1,465,371
Non-controlling interests	12,363	35,515
Total Equity	2,495,487	1,500,886
Total Liabilities and Equity	10,466,061	4,588,521
Class A Common Stock [Member]
Equity
Class A common stock, $0.01 par value, 200,000,000 shares authorized, 93,229,986 and 58,269,889 shares issued and outstanding as of June 30, 2015 and December 31, 2014, respectively	$ 932	$ 583