Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 181,796	$ 96,450
Restricted cash	476	9,556
Loans receivable, net	9,090,934	9,077,007
Equity investments in unconsolidated subsidiaries	2,806	9,441
Other assets	212,449	184,119
Total Assets	9,488,461	9,376,573
Liabilities and Equity
Secured debt agreements	6,198,093	6,116,105
Loan participations sold	422,585	497,032
Convertible notes, net	165,373	164,026
Other liabilities	193,316	93,679
Total Liabilities	6,979,367	6,870,842
Commitments and contingencies
Equity
Additional paid-in capital	3,079,903	3,070,200
Accumulated other comprehensive loss	(42,143)	(32,758)
Accumulated deficit	(542,282)	(545,791)
Total Blackstone Mortgage Trust, Inc. stockholders' equity	2,496,417	2,492,588
Non-controlling interests	12,677	13,143
Total Equity	2,509,094	2,505,731
Total Liabilities and Equity	9,488,461	9,376,573
Class A Common Stock [Member]
Equity
Class A common stock, $0.01 par value, 200,000,000 shares authorized, 93,912,674 and 93,702,326 shares issued and outstanding as of June 30, 2016 and December 31, 2015, respectively	$ 939	$ 937