Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 15,361	$ 15,423
Restricted cash	12,719	14,246
Investment in CT Legacy Asset, at fair value		132,000
Securities, at fair value	11,702
Loans receivable, at fair value	150,332
Loans receivable, net	139,500	141,500
Loans held-for-sale, net	1,800
Equity investments in unconsolidated subsidiaries	20,046	13,306
Accrued interest receivable, prepaid expenses and other assets	13,693	5,868
Total assets	365,153	322,343
Liabilities:
Accounts payable, accrued expenses and other liabilities	30,760	21,209
Secured notes	8,671	8,497
Repurchase obligations	20,214
Securitized debt obligations	136,944	139,184
Interest rate swap liabilities	6,119
Total liabilities	202,708	168,890
Commitments and contingencies
Equity:
Class A common stock, $0.10 par value, 100,000 shares authorized, 2,927 shares issued and outstanding as of March 31, 2013 and December 31, 2012	293	293
Additional paid-in capital	609,040	609,002
Accumulated deficit	(533,238)	(535,851)
Total Blackstone Mortgage Trust, Inc. shareholders' equity	76,095	73,444
Noncontrolling interests	86,350	80,009
Total equity	162,445	153,453
Total liabilities and equity	365,153	322,343
Variable Interest Entity, Primary Beneficiary
Assets
Loans receivable, net	139,500	141,500
Loans held-for-sale, net	1,800
Accrued interest receivable, prepaid expenses and other assets	2,433	4,021
Total assets	143,733	145,521
Liabilities:
Accounts payable, accrued expenses and other liabilities	168	88
Securitized debt obligations	136,944	139,184
Total liabilities	$ 137,112	$ 139,272