Blackstone Mortgage Trust (BXMT) 10-Q 26 Apr 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 19, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Trading Symbol	BXMT
Entity Registrant Name	BLACKSTONE MORTGAGE TRUST, INC.
Entity Central Index Key	1,061,630
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		93,912,674

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 110,622	$ 96,450
Restricted cash	434	9,556
Loans receivable, net	9,313,763	9,077,007
Equity investments in unconsolidated subsidiaries	2,762	9,441
Other assets	127,185	184,119
Total Assets	9,554,766	9,376,573
Liabilities and Equity
Accounts payable, accrued expenses, and other liabilities	99,684	93,679
Secured debt agreements	6,311,659	6,116,105
Loan participations sold	476,894	497,032
Convertible notes, net	164,696	164,026
Total Liabilities	$ 7,052,933	$ 6,870,842
Commitments and contingencies
Equity
Additional paid-in capital	$ 3,074,975	$ 3,070,200
Accumulated other comprehensive loss	(33,445)	(32,758)
Accumulated deficit	(547,052)	(545,791)
Total Blackstone Mortgage Trust, Inc. stockholders' equity	2,495,417	2,492,588
Non-controlling interests	6,416	13,143
Total Equity	2,501,833	2,505,731
Total Liabilities and Equity	9,554,766	9,376,573
Class A Common Stock [Member]
Equity
Class A common stock, $0.01 par value, 200,000,000 shares authorized, 93,912,409 and 93,702,326 shares issued and outstanding as of March 31, 2016 and December 31, 2015, respectively	$ 939	$ 937

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - Class A Common Stock [Member] - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Common stock, par value in dollars per share	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	93,912,409	93,702,326
Common stock, shares outstanding	93,912,409	93,702,326

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income from loans and other investments
Interest and related income	$ 123,025	$ 63,407
Less: Interest and related expenses	45,381	24,161
Income from loans and other investments, net	77,644	39,246
Other expenses
Management and incentive fees	13,613	6,671
General and administrative expenses	6,795	7,663
Total other expenses	20,408	14,334
Gain on investments at fair value	66	17,476
Income from equity investments in unconsolidated subsidiaries	138	3,950
Income before income taxes	57,440	46,338
Income tax provision	241	245
Net income	57,199	46,093
Net income attributable to non-controlling interests	(152)	(10,700)
Net income attributable to Blackstone Mortgage Trust, Inc.	$ 57,047	$ 35,393
Net income per share of common stock basic and diluted	$ 0.61	$ 0.60
Weighted-average shares of common stock outstanding basic and diluted	94,067,769	58,576,025
Dividends declared per share of common stock	$ 0.62	$ 0.52

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net income	$ 57,199	$ 46,093
Other comprehensive loss
Unrealized gain (loss) on foreign currency remeasurement	5,979	(20,069)
Unrealized (loss) gain on derivative financial instruments	(6,666)	3,337
Other comprehensive loss	(687)	(16,732)
Comprehensive income	56,512	29,361
Comprehensive income attributable to non-controlling interests	(152)	(10,700)
Comprehensive income attributable to Blackstone Mortgage Trust, Inc.	$ 56,360	$ 18,661

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Stockholders' Equity [Member]	Non-Controlling Interests [Member]	Class A Common Stock [Member]Common Stock [Member]
Balance at Dec. 31, 2014	$ 1,500,886	$ 2,027,404	$ (15,024)	$ (547,592)	$ 1,465,371	$ 35,515	$ 583
Shares of class A common stock issued, net	2				2		2
Restricted class A common stock earned	3,202	3,202			3,202
Dividends reinvested	3	60		(57)	3
Deferred directors' compensation	94	94			94
Other comprehensive loss	(16,732)		(16,732)		(16,732)
Net income	46,093			35,393	35,393	10,700
Dividends declared on common stock	(30,398)			(30,398)	(30,398)
Distributions to non-controlling interests	(452)					(452)
Balance at Mar. 31, 2015	1,502,698	2,030,760	(31,756)	(542,654)	1,456,935	45,763	585
Balance at Dec. 31, 2015	2,505,731	3,070,200	(32,758)	(545,791)	2,492,588	13,143	937
Shares of class A common stock issued, net	2				2		2
Restricted class A common stock earned	4,593	4,593			4,593
Dividends reinvested	6	88		(82)	6
Deferred directors' compensation	94	94			94
Other comprehensive loss	(687)		(687)		(687)
Net income	57,199			57,047	57,047	152
Dividends declared on common stock	(58,226)			(58,226)	(58,226)
Distributions to non-controlling interests	(6,879)					(6,879)
Balance at Mar. 31, 2016	$ 2,501,833	$ 3,074,975	$ (33,445)	$ (547,052)	$ 2,495,417	$ 6,416	$ 939

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 57,199	$ 46,093
Adjustments to reconcile net income to net cash provided by operating activities
Gain on investments at fair value	(66)	(17,476)
Income from equity investments in unconsolidated subsidiaries	(138)	(3,950)
Non-cash compensation expense	4,852	6,104
Distributions of income from unconsolidated subsidiaries	6,837
Amortization of deferred interest on loans	(8,954)	(5,717)
Amortization of deferred financing costs and premiums/discount on debt obligations	4,053	3,519
Changes in assets and liabilities, net
Other assets	4,254	2,021
Accounts payable, accrued expenses, and other liabilities	(2,256)	1,819
Net cash provided by operating activities	65,781	32,413
Cash flows from investing activities
Originations and fundings of loans receivable	(586,066)	(903,152)
Principal collections and proceeds from loans receivable and other assets	420,513	348,153
Origination and exit fees received on loans receivable	10,424	6,078
Decrease (increase) in restricted cash	9,122	(15,299)
Net cash used in investing activities	(146,007)	(564,220)
Cash flows from financing activities
Borrowings under secured debt agreements	629,897	688,142
Repayments under secured debt agreements	(466,536)	(387,555)
Proceeds from sales of loan participations		256,000
Repayment of loan participations	(9,600)	(28,164)
Payment of deferred financing costs	(5,260)	(3,053)
Receipts under derivative financial instruments	8,218	4,141
Distributions to non-controlling interests	(6,879)	(452)
Net proceeds from issuance of class A common stock	6	3
Dividends paid on class A common stock	(58,097)	(30,300)
Net cash provided by financing activities	91,749	498,762
Net increase (decrease) in cash and cash equivalents	11,523	(33,045)
Cash and cash equivalents at beginning of period	96,450	51,810
Effects of currency translation on cash and cash equivalents	2,649	(291)
Cash and cash equivalents at end of period	110,622	18,474
Supplemental disclosure of cash flows information
Payments of interest	(38,121)	(18,996)
Payments of income taxes	(151)	(129)
Supplemental disclosure of non-cash investing and financing activities
Dividends declared, not paid	(58,226)	(30,398)
Principal payments held by servicer	$ 75,378	$ 108

Organization

Organization	3 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	1. ORGANIZATION References herein to “Blackstone Mortgage Trust,” “Company,” “we,” “us” or “our” refer to Blackstone Mortgage Trust, Inc. and its subsidiaries unless the context specifically requires otherwise. Blackstone Mortgage Trust is a real estate finance company that originates and purchases senior loans collateralized by properties in North America and Europe. We are externally managed by BXMT Advisors L.L.C., or our Manager, a subsidiary of The Blackstone Group L.P., or Blackstone, and are a real estate investment trust, or REIT, traded on the New York Stock Exchange, or NYSE, under the symbol “BXMT.” We are headquartered in New York City. We conduct our operations as a REIT for U.S. federal income tax purposes. We generally will not be subject to U.S. federal income taxes on our taxable income to the extent that we annually distribute all of our net taxable income to stockholders and maintain our qualification as a REIT. We also operate our business in a manner that permits us to maintain our exclusion from registration under the Investment Company Act of 1940, as amended. We are organized as a holding company and conduct our business primarily through our various subsidiaries.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, for interim financial information and the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. The consolidated financial statements, including the notes thereto, are unaudited and exclude some of the disclosures required in audited financial statements. Management believes it has made all necessary adjustments, consisting of only normal recurring items, so that the consolidated financial statements are presented fairly and that estimates made in preparing its consolidated financial statements are reasonable and prudent. The operating results presented for interim periods are not necessarily indicative of the results that may be expected for any other interim period or for the entire year. The accompanying unaudited consolidated interim financial statements should be read in conjunction with the audited consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015 filed with the Securities and Exchange Commission. Basis of Presentation The accompanying consolidated financial statements include, on a consolidated basis, our accounts, the accounts of our wholly-owned subsidiaries, majority-owned subsidiaries, and variable interest entities, or VIEs, of which we are the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. Certain of the assets and credit of our consolidated subsidiaries are not available to satisfy the debt or other obligations of us, our affiliates, or other entities. One of our subsidiaries, CT Legacy Partners, LLC, or CT Legacy Partners, accounts for its operations in accordance with industry-specific GAAP accounting guidance for investment companies, pursuant to which it reports its investments at fair value. We have retained this accounting treatment in consolidation and, accordingly, report the loans and other investments of CT Legacy Partners at fair value on our consolidated balance sheets. Certain reclassifications have been made in the presentation of the prior period consolidated statement of cash flows to conform to the current period presentation. Principles of Consolidation We consolidate all entities that we control through either majority ownership or voting rights. In addition, we consolidate all VIEs of which we are considered the primary beneficiary. VIEs are defined as entities in which equity investors (i) do not have the characteristics of a controlling financial interest and/or (ii) do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from other parties. The entity that consolidates a VIE is known as its primary beneficiary and is generally the entity with (i) the power to direct the activities that most significantly affect the VIE’s economic performance and (ii) the right to receive benefits from the VIE or the obligation to absorb losses of the VIE that could be significant to the VIE. As of both March 31, 2016 and December 31, 2015, we did not consolidate any VIEs. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may ultimately differ from those estimates. Revenue Recognition Interest income from our loans receivable is recognized over the life of each investment using the effective interest method and is recorded on the accrual basis. Recognition of fees, premiums, and discounts associated with these investments is deferred until the loan is advanced and is then recorded over the term of the loan as an adjustment to yield. Income accrual is generally suspended for loans at the earlier of the date at which payments become 90 days past due or when, in the opinion of our Manager, recovery of income and principal becomes doubtful. Income is then recorded on the basis of cash received until accrual is resumed when the loan becomes contractually current and performance is demonstrated to be resumed. In addition, for loans we originate, the related origination expenses are deferred and recognized as a component of interest income, however expenses related to loans we acquire are included in general and administrative expenses as incurred. Cash and Cash Equivalents Cash and cash equivalents represent cash held in banks, cash on hand, and liquid investments with original maturities of three months or less. We may have bank balances in excess of federally insured amounts; however, we deposit our cash and cash equivalents with high credit-quality institutions to minimize credit risk exposure. We have not experienced, and do not expect, any losses on our cash or cash equivalents. Restricted Cash We classify the cash balances held by CT Legacy Partners as restricted because, while these cash balances are available for use by CT Legacy Partners for its operations, they cannot be used by us until our allocable share is distributed from CT Legacy Partners and cannot be commingled with any of our unrestricted cash balances. Loans Receivable and Provision for Loan Losses We originate and purchase commercial real estate debt and related instruments generally to be held as long-term investments at amortized cost. We are required to periodically evaluate each of these loans for possible impairment. Impairment is indicated when it is deemed probable that we will not be able to collect all amounts due to us pursuant to the contractual terms of the loan. If a loan is determined to be impaired, we write down the loan through a charge to the provision for loan losses. Impairment of these loans, which are collateral dependent, is measured by comparing the estimated fair value of the underlying collateral, less costs to sell, to the book value of the respective loan. These valuations require significant judgments, which include assumptions regarding capitalization rates, leasing, creditworthiness of major tenants, occupancy rates, availability of financing, exit plan, loan sponsorship, actions of other lenders, and other factors deemed necessary by our Manager. Actual losses, if any, could ultimately differ from these estimates. Our Manager performs a quarterly review of our portfolio of loans. In conjunction with this review, our Manager assesses the risk factors of each loan, and assigns a risk rating based on a variety of factors, including, without limitation, loan-to-value ratio, or LTV, debt yield, property type, geographic and local market dynamics, physical condition, cash flow volatility, leasing and tenant profile, loan structure and exit plan, and project sponsorship. Based on a 5-point scale, our loans are rated “1” through “5,” from less risk to greater risk, which ratings are defined as follows: 1 - Very Low Risk 2 - Low Risk 3 - Medium Risk 4 - High Risk/Potential for Loss: 5 - Impaired/Loss Likely: During the second quarter of 2015, we acquired a portfolio of loans from General Electric Capital Corporation and certain of its affiliates, or the GE portfolio, for a total purchase price of $4.7 billion. We allocated the aggregate purchase price between each loan based on its fair value relative to the overall portfolio, which allocation resulted in purchase discounts or premiums determined on an asset-by-asset basis. Each loan will accrete from its allocated purchase price to its expected collection value over the life of the loan, consistent with the other loans in our portfolio. Equity Investments in Unconsolidated Subsidiaries Our carried interest in CT Opportunity Partners I, LP, or CTOPI, is accounted for using the equity method. CTOPI’s assets and liabilities are not consolidated into our financial statements due to our determination that (i) it is not a VIE and (ii) the other investors in CTOPI have sufficient rights to preclude consolidation by us. As such, we report our allocable percentage of the net assets of CTOPI on our consolidated balance sheets. The recognition of income from CTOPI is generally deferred until cash is collected or appropriate contingencies have been eliminated. Derivative Financial Instruments We classify all derivative financial instruments as either other assets or other liabilities on our consolidated balance sheets at fair value. On the date we enter into a derivative contract, we designate each contract as (i) a hedge of a net investment in a foreign operation, or net investment hedge, (ii) a hedge of a forecasted transaction or of the variability of cash flows to be received or paid related to a recognized asset or liability, or cash flow hedge, (iii) a hedge of a recognized asset or liability, or fair value hedge, or (iv) a derivative instrument not to be designated as a hedging derivative, or freestanding derivative. For all derivatives other than those designated as freestanding derivatives, we formally document our hedge relationships and designation at inception. This documentation includes the identification of the hedging instruments and the hedged items, its risk management objectives, strategy for undertaking the hedge transaction and our evaluation of the effectiveness of its hedged transaction. On a quarterly basis, we also formally assess whether the derivative we designated in each hedging relationship is expected to be, and has been, highly effective in offsetting changes in the value or cash flows of the hedged items. If it is determined that a derivative is not highly effective at hedging the designated exposure, hedge accounting is discontinued. Changes in the fair value of the effective portion of our hedges are reflected in accumulated other comprehensive income (loss) on our consolidated financial statements. Changes in the fair value of the ineffective portion of our hedges are included in net income. Amounts are reclassified out of accumulated other comprehensive income (loss) and into net income when the hedged item is either sold or substantially liquidated. To the extent a derivative does not qualify for hedge accounting and is deemed a freestanding derivative, the changes in its value are included in net income. Repurchase Agreements We record investments financed with repurchase agreements as separate assets and the related borrowings under any repurchase agreements are recorded as separate liabilities on our consolidated balance sheets. Interest income earned on the investments and interest expense incurred on the repurchase agreements are reported separately on our consolidated statements of operations. Loan Participations Sold Loan participations sold represent senior interests in certain loans that we sold, however we present such loan participations sold as liabilities because these arrangements do not qualify as sales under GAAP. These participations are non-recourse and remain on our consolidated balance sheet until the loan is repaid. The gross presentation of loan participations sold does not impact stockholders’ equity or net income. Convertible Notes The “Debt with Conversion and Other Options” Topic of the Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, requires the liability and equity components of convertible debt instruments that may be settled in cash upon conversion, including partial cash settlement, to be separately accounted for in a manner that reflects the issuer’s nonconvertible debt borrowing rate. The initial proceeds from the sale of convertible notes are allocated between a liability component and an equity component in a manner that reflects interest expense at the rate of similar nonconvertible debt that could have been issued at such time. The equity component represents the excess initial proceeds received over the fair value of the liability component of the notes as of the date of issuance. We measured the estimated fair value of the debt component of our convertible notes as of the issuance date based on our nonconvertible debt borrowing rate. The equity component of the convertible notes is reflected within additional paid-in capital on our consolidated balance sheet, and the resulting debt discount is amortized over the period during which the convertible notes are expected to be outstanding (through the maturity date) as additional non-cash interest expense. The additional non-cash interest expense attributable to the convertible notes will increase in subsequent periods through the maturity date as the notes accrete to their par value over the same period. Deferred Financing Costs The deferred financing costs that are included as a reduction in the net book value of the related liability on our consolidated balance sheets include issuance and other costs related to our debt obligations. These costs are amortized as interest expense using the effective interest method over the life of the related obligations. Fair Value of Financial Instruments The “Fair Value Measurements and Disclosures” Topic, or ASC 820, defines fair value, establishes a framework for measuring fair value, and requires certain disclosures about fair value measurements under GAAP. Specifically, this guidance defines fair value based on exit price, or the price that would be received upon the sale of an asset or the transfer of a liability in an orderly transaction between market participants at the measurement date. ASC 820 also establishes a fair value hierarchy that prioritizes and ranks the level of market price observability used in measuring financial instruments. Market price observability is affected by a number of factors, including the type of financial instrument, the characteristics specific to the financial instrument, and the state of the marketplace, including the existence and transparency of transactions between market participants. Financial instruments with readily available quoted prices in active markets generally will have a higher degree of market price observability and a lesser degree of judgment used in measuring fair value. Financial instruments measured and reported at fair value are classified and disclosed based on the observability of inputs used in the determination, as follows: • Level 1: Generally includes only unadjusted quoted prices that are available in active markets for identical financial instruments as of the reporting date. • Level 2: Pricing inputs include quoted prices in active markets for similar instruments, quoted prices in less active or inactive markets for identical or similar instruments where multiple price quotes can be obtained, and other observable inputs, such as interest rates, yield curves, credit risks, and default rates. • Level 3: Pricing inputs are unobservable for the financial instruments and include situations where there is little, if any, market activity for the financial instrument. These inputs require significant judgment or estimation by management of third parties when determining fair value and generally represent anything that does not meet the criteria of Levels 1 and 2. The estimated value of each asset reported at fair value using Level 3 inputs is determined by an internal committee composed of members of senior management of our Manager, including our Chief Executive Officer, Chief Financial Officer, and other senior officers. Certain of our other assets are reported at fair value either (i) on a recurring basis, as of each quarter-end, or (ii) on a nonrecurring basis, as a result of impairment or other events. Our assets that are recorded at fair value are discussed further in Note 14. We generally value our assets recorded at fair value by either (i) discounting expected cash flows based on assumptions regarding the collection of principal and interest and estimated market rates, or (ii) obtaining assessments from third-party dealers. For collateral-dependent loans that are identified as impaired, we measure impairment by comparing our Manager’s estimation of fair value of the underlying collateral, less costs to sell, to the book value of the respective loan. These valuations may require significant judgments, which include assumptions regarding capitalization rates, leasing, creditworthiness of major tenants, occupancy rates, availability of financing, exit plan, loan sponsorship, actions of other lenders, and other factors deemed necessary by our Manager. We are also required by GAAP to disclose fair value information about financial instruments, that are not otherwise reported at fair value in our consolidated balance sheet, to the extent it is practicable to estimate a fair value for those instruments. These disclosure requirements exclude certain financial instruments and all non-financial instruments. The following methods and assumptions are used to estimate the fair value of each class of financial instruments, for which it is practicable to estimate that value: • Cash and cash equivalents: The carrying amount of cash on deposit and in money market funds approximates fair value. • Restricted cash: The carrying amount of restricted cash approximates fair value. • Loans receivable, net: The fair values for these loans were estimated by our Manager based on discounted cash flow methodology taking into consideration factors, including capitalization rates, discount rates, leasing, occupancy rates, availability and cost of financing, exit plan, sponsorship, actions of other lenders, and indications of market value from other market participants. • Derivative financial instruments: The fair value of our foreign currency contracts and interest rates caps was valued using advice from a third party derivative specialist, based on contractual cash flows and observable inputs comprising foreign currency rates and credit spreads. • Secured debt agreements: The fair values for these instruments were estimated based on the rate at which a similar credit facility would have currently priced. • Loan participations sold: The fair value of these instruments were estimated based on the value of the related loan receivable asset. • Convertible notes, net: The convertible notes are actively traded and their fair values were obtained using quoted market prices for these instruments. Income Taxes Our financial results generally do not reflect provisions for current or deferred income taxes on our REIT taxable income. We believe that we operate in a manner that will continue to allow us to be taxed as a REIT and, as a result, we generally do not expect to pay substantial corporate level taxes other than those payable by our taxable REIT subsidiaries. If we were to fail to meet these requirements, we may be subject to federal, state, and local income tax on current and past income, and penalties. Refer to Note 12 for additional information. Stock-Based Compensation Our stock-based compensation consists of awards issued to our Manager and certain of its employees that vest over the life of the awards as well as deferred stock units issued to certain members of our Board of Directors. Stock-based compensation expense is recognized for these awards in net income on a variable basis over the applicable vesting period of the awards, based on the value of our class A common stock. Refer to Note 13 for additional information. Earnings per Share Basic earnings per share, or Basic EPS, is computed in accordance with the two-class method and is based on the net earnings allocable to our class A common stock, including restricted class A common stock and deferred stock units, divided by the weighted-average number of shares of class A common stock, including restricted class A common stock and deferred stock units outstanding during the period. Our restricted class A common stock is considered a participating security, as defined by GAAP, and has been included in our Basic EPS under the two-class method as these restricted shares have the same rights as our other shares of class A common stock, including participating in any gains or losses. Diluted earnings per share, or Diluted EPS, is determined using the treasury stock method, and is based on the net earnings allocable to our class A common stock, including restricted class A common stock and deferred stock units, divided by the weighted-average number of shares of class A common stock, including restricted class A common stock and deferred stock units. Refer to Note 10 for additional discussion of earnings per share. Foreign Currency In the normal course of business, we enter into transactions not denominated in United States, or U.S., dollars. Foreign exchange gains and losses arising on such transactions are recorded as a gain or loss in our consolidated statements of operations. In addition, we consolidate entities that have a non-U.S. dollar functional currency. Non-U.S. dollar denominated assets and liabilities are translated to U.S. dollars at the exchange rate prevailing at the reporting date and income, expenses, gains, and losses are translated at the average exchange rate over the applicable period. Cumulative translation adjustments arising from the translation of non-U.S. dollar denominated subsidiaries are recorded in other comprehensive income. Underwriting Commissions and Offering Costs Underwriting commissions and offering costs incurred in connection with common stock offerings are reflected as a reduction of additional paid-in capital. Costs incurred that are not directly associated with the completion of a common stock offering are expensed when incurred. Recent Accounting Pronouncements In March 2016, the FASB issued ASU 2016-09, “Improvements to Employee Share-Based Payment Accounting (Topic 718),” or ASU 2016-09. ASU 2016-09 requires all income tax effects of share-based payment awards to be recognized in the income statement when the awards vest or are settled. ASU 2016-09 also allows an employer to repurchase more of an employee’s shares for tax withholding purposes than is permitted under current guidance without triggering liability accounting. Finally, ASU 2016-09 allows a policy election to account for forfeitures as they occur. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. We do not anticipate that the adoption of ASU 2016-09 will have a material impact on our consolidated financial statements. In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements – Going Concern (Subtopic 2015-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern,” or ASU 2014-15. ASU 2014-15 introduces an explicit requirement for management to assess and provide certain disclosures if there is substantial doubt about an entity’s ability to continue as a going concern. ASU 2014-15 is effective for the annual period ending after December 15, 2016. We do not anticipate that the adoption of ASU 2014-15 will have a material impact on our consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606) ,

Loans Receivable

Loans Receivable	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Loans Receivable	3. LOANS RECEIVABLE During the three months ended March 31, 2016, we originated $861.3 million of loans, and funded $586.1 million under new and existing loans. The following table details overall statistics for our loans receivable portfolio as of March 31, 2016 ($ in thousands): Floating Rate Fixed Rate Total Number of loans 96 30 126 Principal balance $ 7,397,918 $ 1,948,329 $ 9,346,247 Net book value $ 7,362,047 $ 1,951,716 $ 9,313,763 Unfunded loan commitments (1) $ 962,425 $ 2,715 $ 965,140 Weighted-average cash coupon (2) L+4.08 % 5.64 % 4.82 % Weighted-average all-in yield (2) L+4.51 % 5.73 % 5.18 % Weighted-average maximum maturity (years) (3) 3.2 2.2 3.0 (1) Unfunded commitments will primarily be funded to finance property improvements or lease-related expenditures by the borrowers. These future commitments will expire over the next four years. (2) As of March 31, 2016, our floating rate loans were indexed to various benchmark rates, with 83% of floating rate loans indexed to USD LIBOR. In addition, $146.9 million of our floating rate loans earned interest based on floors that are above the applicable index, with an average floor of 1.80%, as of March 31, 2016. In addition to cash coupon, all-in yield includes the amortization of deferred origination fees, loan origination costs, purchase discounts, and accrual of both extension and exit fees. Cash coupon and all-in yield for the total portfolio assume applicable floating benchmark rate for weighted-average calculation. (3) Maximum maturity assumes all extension options are exercised by the borrower, however our loans may be repaid prior to such date. As of March 31, 2016, 63% of our loans were subject to yield maintenance or other prepayment restrictions and 37% were open to repayment by the borrower without penalty. The following table details overall statistics for our loans receivable portfolio as of December 31, 2015 ($ in thousands): Floating Rate Fixed Rate Total Number of loans 92 33 125 Principal balance $ 7,098,180 $ 2,010,181 $ 9,108,361 Net book value $ 7,064,279 $ 2,012,728 $ 9,077,007 Unfunded loan commitments (1) $ 696,276 $ 4,382 $ 700,658 Weighted-average cash coupon (2) L+4.09 % 5.63 % 4.84 % Weighted-average all-in yield (2) L+4.49 % 5.78 % 5.18 % Weighted-average maximum maturity (years) (3) 3.3 2.6 3.1 (1) Unfunded commitments will primarily be funded to finance property improvements or lease-related expenditures by the borrowers. These future commitments will expire over the next four years. (2) As of December 31, 2015, our floating rate loans were indexed to various benchmark rates, with 84% of floating rate loans indexed to USD LIBOR. In addition, $147.9 million of our floating rate loans earned interest based on floors that are above the applicable index, with an average floor of 1.80%, as of December 31, 2015. In addition to cash coupon, all-in yield includes the amortization of deferred origination fees, loan origination costs, purchase discounts, and accrual of both extension and exit fees. Cash coupon and all-in yield for the total portfolio assume applicable floating benchmark rate for weighted-average calculation. (3) Maximum maturity assumes all extension options are exercised by the borrower, however our loans may be repaid prior to such date. As of December 31, 2015, 64% of our loans were subject to yield maintenance or other prepayment restrictions and 36% were open to repayment by the borrower without penalty. Activity relating to our loans receivable portfolio was as follows ($ in thousands): Principal Deferred Fees / Net Book Balance Other Items (1) Value December 31, 2015 $ 9,108,361 $ (31,354 ) $ 9,077,007 Loan originations and fundings 586,066 — 586,066 Loan repayments (375,374 ) — (375,374 ) Unrealized gain on foreign currency translation 27,194 340 27,534 Deferred fees and other items (1) — (10,424 ) (10,424 ) Amortization of fees and other items (1) — 8,954 8,954 March 31, 2016 $ 9,346,247 $ (32,484 ) $ 9,313,763 (1) Other items primarily consist of purchase discounts or premiums, exit fees, and deferred origination expenses. The tables below detail the types of loans in our loan portfolio, as well as the property type and geographic distribution of the properties securing these loans ($ in thousands): March 31, 2016 December 31, 2015 Asset Type Net Book Value Percentage Net Book Value Percentage Senior loans (1) $ 9,076,146 97 % $ 8,847,044 97 % Subordinate loans (2) 237,617 3 229,963 3 $ 9,313,763 100 % $ 9,077,007 100 % Property Type Net Book Value Percentage Net Book Value Percentage Office $ 4,164,413 45 % $ 4,039,521 45 % Hotel 1,871,777 20 1,903,544 21 Manufactured housing 1,349,509 14 1,361,572 15 Retail 802,471 9 684,944 8 Multifamily 551,701 6 580,112 6 Condominium 205,800 2 127,434 1 Other 368,092 4 379,880 4 $ 9,313,763 100 % $ 9,077,007 100 % Geographic Location Net Book Value Percentage Net Book Value Percentage United States Northeast $ 2,190,170 23 % $ 2,260,392 25 % Southeast 1,802,381 18 1,836,766 20 West 1,354,256 15 1,125,238 12 Southwest 953,204 10 1,035,839 11 Midwest 703,285 8 616,964 7 Northwest 350,545 4 390,307 4 Subtotal 7,353,841 78 7,265,506 79 International United Kingdom 982,404 11 888,998 10 Canada 604,343 6 561,023 6 Germany 242,200 3 235,294 3 Spain 69,180 1 66,661 1 Netherlands 61,795 1 59,525 1 Subtotal 1,959,922 22 1,811,501 21 Total $ 9,313,763 100 % $ 9,077,007 100 % (1) Includes senior mortgages and similar credit quality loans, including related contiguous subordinate loans, and pari passu participations in senior mortgage loans. (2) Includes mezzanine loans and subordinate interests in mortgages. Loan Risk Ratings As further described in Note 2, our Manager evaluates our loan portfolio on a quarterly basis. In conjunction with our quarterly loan portfolio review, our Manager assesses the risk factors of each loan, and assigns a risk rating based on several factors. Factors considered in the assessment include, but are not limited to, risk of loss, current LTV, debt yield, collateral performance, structure, exit plan, and sponsorship. Loans are rated “1” (less risk) through “5” (greater risk), which ratings are defined in Note 2. The following table allocates the principal balance and net book value of our loans receivable based on our internal risk ratings ($ in thousands): March 31, 2016 December 31, 2015 Risk Rating Number of Loans Principal Balance Net Book Value Number of Loans Principal Balance Net Book Value 1 13 $ 915,990 $ 911,350 12 $ 925,443 $ 919,991 2 72 5,743,148 5,729,541 77 5,948,922 5,929,447 3 40 2,633,081 2,619,223 35 2,120,713 2,114,531 4 1 54,028 53,649 1 113,283 113,038 5 — — — — — — 126 $ 9,346,247 $ 9,313,763 125 $ 9,108,361 $ 9,077,007 We did not have any impaired loans, nonaccrual loans, or loans in maturity default as of March 31, 2016 or December 31, 2015. During the third quarter of 2015, one of the loans in our portfolio experienced a maturity default as a result of not meeting certain loan covenants. During the fourth quarter of 2015 and the first quarter of 2016, the loan was modified to include, among other changes: a redetermination of asset release pricing; an additional borrower contribution of capital; and an extension of the maturity date to August 31, 2016. During the three months ended March 31, 2016, two of the assets collateralizing the $113.3 million loan were sold and the loan was partially repaid by $59.3 million, resulting in a net book value of $53.6 million as of March 31, 2016. As of March 31, 2016 and December 31, 2015, the borrower was current with all terms of the loan and we expect to collect all contractual amounts due thereunder.

Equity Investments in Unconsoli

Equity Investments in Unconsolidated Subsidiaries	3 Months Ended
	Mar. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Equity Investments in Unconsolidated Subsidiaries	4. EQUITY INVESTMENTS IN UNCONSOLIDATED SUBSIDIARIES As of March 31, 2016, our equity investments in unconsolidated subsidiaries consisted solely of our carried interest in CTOPI, a fund sponsored and managed by an affiliate of our Manager. Activity relating to our equity investments in unconsolidated subsidiaries was as follows ($ in thousands): CTOPI Carried Interest Total as of December 31, 2015 $ 9,441 Distributions (6,837 ) Income allocation (1) 158 Total as of March 31, 2016 $ 2,762 (1) In instances where we have not received cash or all appropriate contingencies have not been eliminated, we have deferred the recognition of promote revenue allocated to us from CTOPI in respect of our carried interest in CTOPI, and recorded an offsetting liability as a component of accounts payable, accrued expenses, and other liabilities on our consolidated balance sheets. Our carried interest in CTOPI entitles us to earn promote revenue in an amount equal to 17.7% of the fund’s profits, after a 9% preferred return and 100% return of capital to the CTOPI partners. As of March 31, 2016, we had been allocated $2.8 million of promote revenue from CTOPI based on a hypothetical liquidation of the fund at its net asset value. Accordingly, we have recognized this allocation as an equity investment in CTOPI on our consolidated balance sheets. Generally, we defer recognition of income from CTOPI until cash is received or earned, pending distribution, and appropriate contingencies have been eliminated. We recognized $138,000 and $3.9 million of promote income from CTOPI in respect of our carried interest and recorded such amounts as income in our consolidated statement of operations during the three months ended March 31, 2016 and 2015, respectively. This carried interest was either received in cash, or was earned and available in cash at CTOPI pending future distribution as of each respective balance sheet date. CTOPI Incentive Management Fee Grants In January 2011, we created a management compensation pool for employees equal to 45% of the CTOPI promote distributions received by us. Approximately 68% of the pool is two-thirds vested as of March 31, 2016, with the remainder contingent on continued employment with an affiliate of our Manager and upon our receipt of promote distributions from CTOPI. The remaining 32% of the pool is fully vested as a result of an acceleration event. During the three months ended March 31, 2016 and 2015, we recognized $170,000 and $1.8 million, respectively, under the CTOPI incentive plan, which amounts were recognized as a component of general and administrative expenses in our consolidated statement of operations.

Other Assets

Other Assets	3 Months Ended
	Mar. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Assets	5. OTHER ASSETS The following table details the components of our other assets ($ in thousands): March 31, December 31, 2016 2015 Principal and interest payments held by servicer (1) $ 77,145 $ 123,160 Accrued interest receivable 36,901 37,161 Real estate debt and equity investments, at fair value (2) 11,826 14,220 Prepaid expenses 828 890 Prepaid taxes 485 525 Other — 8,163 Total $ 127,185 $ 184,119 (1) Represents loan principal and interest payments held by our third-party loan servicer as of the balance sheet date which were remitted to us during the subsequent remittance cycle. (2) Real estate debt and equity investments consists of assets held by CT Legacy Partners and are measured at fair value.

Secured Debt Agreements

Secured Debt Agreements	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Secured Debt Agreements	6. SECURED DEBT AGREEMENTS Our secured debt agreements included revolving repurchase facilities, the GE portfolio acquisition facility, and asset-specific financings. The following table details our secured debt agreements ($ in thousands): Secured Debt Agreements Borrowings Outstanding March 31, 2016 December 31, 2015 Revolving repurchase facilities $ 3,252,405 $ 2,858,714 GE portfolio acquisition facility 2,919,946 3,161,291 Asset-specific financings 157,034 111,746 Total secured debt agreements $ 6,329,385 $ 6,131,751 Deferred financing costs (1) (17,726 ) (15,646 ) Net book value of secured debt $ 6,311,659 $ 6,116,105 (1) Costs incurred in connection with our secured debt agreements are recorded on our consolidated balance sheet when incurred and recognized as a component of interest expense over the life of each related agreement. Revolving Repurchase Facilities The following table details our revolving repurchase facilities ($ in thousands): March 31, 2016 Maximum Collateral Repurchase Borrowings Lender Facility Size (1) Assets (2) Potential (3) Outstanding Available (3) Wells Fargo (4) $ 1,172,000 $ 1,286,632 $ 1,005,043 $ 871,485 $ 133,558 Bank of America 750,000 847,304 666,275 618,944 47,331 JP Morgan (5) 762,500 796,344 638,390 564,605 73,785 MetLife 695,945 767,290 594,369 466,107 128,262 Citibank (6) 537,500 590,281 455,716 377,251 78,465 Morgan Stanley (7) 359,450 387,317 301,005 298,082 2,923 Société Générale (8) 453,520 69,914 55,931 55,931 — $ 4,730,915 $ 4,745,082 $ 3,716,729 $ 3,252,405 $ 464,324 December 31, 2015 Maximum Collateral Repurchase Borrowings Lender Facility Size (1) Assets (2) Potential (3) Outstanding Available (3) Wells Fargo (4) $ 1,172,000 $ 1,044,860 $ 817,562 $ 685,485 $ 132,077 Bank of America 750,000 840,884 665,861 618,944 46,917 JP Morgan (5) 787,047 864,630 689,705 596,533 93,172 MetLife 750,000 593,273 462,849 324,587 138,262 Citibank (6) 537,500 604,781 461,532 370,194 91,338 Morgan Stanley (7) 370,400 273,280 212,050 209,038 3,012 Société Générale (8) 437,320 67,416 53,933 53,933 — $ 4,804,267 $ 4,289,124 $ 3,363,492 $ 2,858,714 $ 504,778 (1) Maximum facility size represents the largest amount of borrowings available under a given facility once sufficient collateral assets have been approved by the lender and pledged by us. (2) Represents the principal balance of the collateral assets. (3) Potential borrowings represents the total amount we could draw under each facility based on collateral already approved and pledged. When undrawn, these amounts are immediately available to us at our sole discretion under the terms of each revolving credit facility. (4) As of both March 31, 2016 and December 31, 2015, the Wells Fargo maximum facility size was composed of a general $1.0 billion facility size and $172.0 million of additional capacity related solely to a specific asset with a repurchase date of July 30, 2016. (5) As of March 31, 2016, the JP Morgan maximum facility size was composed of a general $500.0 million facility size, under which U.S. Dollars and British Pound Sterling borrowings are contemplated, and $262.5 million of additional capacity related solely to a specific asset with a repurchase date of January 9, 2018. As of December 31, 2015, the JP Morgan maximum facility was composed of general $250.0 million facility size plus a general £153.0 million ($226.7 million) facility size provided under a related agreement that contemplated U.S. Dollars and British Pound Sterling borrowings and, $262.5 million of additional capacity related solely to a specific asset with a repurchase date of January 9, 2018, and additional capacity of £32.3 million ($47.8 million) on the £153.0 million facility. (6) As of both March 31, 2016 and December 31, 2015, the Citibank maximum facility size was composed of a general $500.0 million facility size and $37.5 million of additional capacity related solely to a specific asset with a repurchase date of October 9, 2017. (7) The Morgan Stanley maximum facility size represents a £250.0 million facility size which was translated to $359.5 million as of March 31, 2016, and $370.4 million as of December 31, 2015. (8) The Société Générale maximum facility size represents a €400.0 million facility size which was translated to $453.5 million as of March 31, 2016, and $437.3 million as of December 31, 2015. The weighted-average outstanding balance of our revolving repurchase facilities was $3.1 billion for the three months ended March 31, 2016. As of March 31, 2016, we had aggregate borrowings of $3.3 billion outstanding under our revolving repurchase facilities, with a weighted-average cash coupon of LIBOR plus 1.83% per annum, a weighted-average all-in cost of credit, including associated fees and expenses, of LIBOR plus 2.03% per annum, and a weighted-average advance rate of 79.2%. As of March 31, 2016, outstanding borrowings under these facilities had a weighted-average maturity, excluding extension options and term-out provisions, of 1.3 years. The weighted-average outstanding balance of our revolving repurchase facilities was $2.8 billion for the three months ended December 31, 2015. As of December 31, 2015, we had aggregated borrowings of $2.9 billion outstanding under our revolving repurchase facilities, with a weighted-average cash coupon of LIBOR plus 1.82% per annum, a weighted-average all-in cost of credit, including associated fees and expenses, of LIBOR plus 2.04% per annum, and a weighted-average advance rate of 79.1%. As of December 31, 2015, outstanding borrowings under these facilities had a weighted-average maturity, excluding extension options and term-out provisions, of 1.4 years. Borrowings under each facility are subject to the initial approval of eligible collateral loans by the lender and the maximum advance rate and pricing rate of individual advances are determined with reference to the attributes of the respective collateral loan. During the three months ended March 31, 2016, we extended the maturity date of our $750.0 million revolving repurchase facility with Bank of America to May 21, 2021 (inclusive of two one-year extension options which may be exercised at our sole discretion). The following table outlines the key terms of our revolving repurchase facilities as of March 31, 2016: Lender Rate (1) Guarantee (2) Advance Rate (3) Margin Call (4) Currency Term/Maturity Wells Fargo L+1.78% 25% 79.5% Collateral marks only $ Term matched (5) Bank of America L+1.69% 50% 79.5% Collateral marks only $ May 21, 2021 (6) JP Morgan L+1.80% 25% 80.4% Collateral marks only $ / £ January 7, 2018 MetLife L+1.76% 50% 78.5% Collateral marks only $ February 24, 2021 (7) Citibank L+1.92% 25% 77.7% Collateral marks only $ Term matched (5) Morgan Stanley L+2.35% 25% 79.1% Collateral marks only £ / € March 3, 2017 Société Générale L+1.60% 25% 80.0% Collateral marks only £ / € Term matched (5) (1) Represents weighted-average cash coupon based on borrowings outstanding. In instances where our borrowings are denominated in currencies other than the U.S. Dollar, interest accrues at a rate equivalent to a margin plus a base rate other than 1-month USD LIBOR, such as 3-month GBP LIBOR, 3-month EURIBOR, or 3-month CDOR. (2) Other than amounts guaranteed based on specific collateral asset types, borrowings under our revolving repurchase facilities are non-recourse to us. (3) Represents weighted-average advance rate based on the outstanding principal balance of the collateral assets pledged. (4) Margin call provisions under our revolving repurchase facilities do not permit valuation adjustments based on capital markets events, and are limited to collateral-specific credit marks. (5) These revolving repurchase facilities have various availability periods during which new advances can be made and which are generally subject to each lender’s discretion. Maturity dates for advances outstanding are tied to the term of each respective collateral asset. (6) Includes two one-year extension options which may be exercised at our sole discretion. (7) Includes five one-year extension options which may be exercised at our sole discretion. GE Portfolio Acquisition Facility During the second quarter of 2015, concurrently with our acquisition of the GE portfolio, we entered into an agreement with Wells Fargo to provide us with secured financing for the acquired portfolio. As of March 31, 2016, this facility provided for $3.1 billion of financing, of which $2.9 billion was outstanding and an additional $133.9 million was available to finance future loan fundings. The GE portfolio acquisition facility is non-revolving and consists of a single master repurchase agreement providing for both (i) asset-specific borrowings for each collateral asset as well as (ii) a sequential pay advance feature. Asset-Specific Borrowings The asset-specific borrowings under the GE portfolio acquisition facility were advanced at a weighted-average rate of 80% of our purchase price of the collateral assets and will be repaid pro rata from collateral asset repayment proceeds. The asset-specific borrowings are currency matched to the collateral assets and accrue interest at a rate equal to the sum of (i) the applicable base rate plus (ii) a margin of 1.75%, which will increase to 1.80% and 1.85% in year four and year five, respectively. As of March 31, 2016, those borrowings were denominated in U.S. Dollars, Canadian Dollars, British Pounds Sterling, and Euros. The asset-specific borrowings are term matched to the underlying collateral assets with an outside maturity date of May 20, 2020, which may be extended pursuant to two one-year extension options. We guarantee obligations under the GE portfolio acquisition facility in an amount equal to the greater of (i) 25% of outstanding asset-specific borrowings, and (ii) $250.0 million. We had outstanding asset-specific borrowings of $2.9 billion and $3.1 billion under the GE portfolio acquisition facility as of March 31, 2016 and December 31, 2015, respectively. Sequential Pay Advance The GE portfolio acquisition facility also included a sequential pay advance feature that provided for $237.2 million of borrowings, representing an additional 5% advance against each collateral asset pledged under the facility. As of March 31, 2016, the sequential pay advance borrowings under the GE portfolio acquisition facility had been fully repaid. As of December 31, 2015, we had outstanding sequential pay advance borrowings of $40.7 million. Borrowings under the sequential pay advance accrued interest at a rate equal to the sum of (i) 30-day LIBOR plus (ii) a margin of 3.10%. The sequential pay advance was denominated in U.S. Dollars and was repaid from collateral loan principal repayments, after repayment of the related asset-specific borrowing. The sequential pay advances each had a maturity date that was one year from the date of funding, and we had guaranteed 100% of outstanding borrowings of the sequential pay advance. Asset-Specific Financings During the three months ended March 31, 2016, we entered into two asset-specific financings providing an additional $232.4 million of credit capacity. The following table details statistics for our asset-specific financings ($ in thousands): March 31, 2016 December 31, 2015 Financing Agreements Collateral Assets Financing Agreements Collateral Assets Number of loans 4 4 2 2 Principal balance (1) $ 157,034 $ 214,941 $ 111,746 $ 154,192 Book value $ 154,751 $ 211,292 $ 111,061 $ 153,542 Weighted-average cash coupon (2) L+2.70 % L+5.22 % L+2.52 % L+5.27 % Weighted-average cost / all-in yield (2) L+3.12 % L+5.84 % L+2.88 % L+5.83 % (1) With the exception of $13.2 million related to one asset-specific financing, we do not guarantee the obligations under these agreements. (2) These floating rate loans and related liabilities are indexed to the various benchmark rates relevant in each arrangement in terms of currency and payment frequency. Therefore the net exposure to each benchmark rate is in direct proportion to our net assets indexed to that rate. In addition to cash coupon, cost / all-in yield includes the amortization of deferred origination fees / financing costs. The weighted-average outstanding balance of our asset-specific financings was $141.4 million for the three months ended March 31, 2016 and $224.8 million for the three months ended December 31, 2015. Debt Covenants Each of the guarantees related to our secured debt agreements contain the following uniform financial covenants: (i) our ratio of earnings before interest, taxes, depreciation, and amortization, or EBITDA, to fixed charges, as defined in the agreements, shall be not less than 1.40 to 1.0; (ii) our tangible net worth, as defined in the agreements, shall not be less than $1.9 billion as of each measurement date plus 75% of the net cash proceeds of future equity issuances subsequent to March 31, 2016; (iii) cash liquidity shall not be less than the greater of (x) $10.0 million or (y) 5% of our recourse indebtedness; and (iv) our indebtedness shall not exceed 83.33% of our total assets. As of March 31, 2016 and December 31, 2015, we were in compliance with these covenants. Subsequent Events On April 4, 2016, we entered into a $125.0 million full recourse revolving credit agreement with Barclays which is designed to finance first mortgage originations for up to six months as a bridge to term financing or syndication. Advances under the credit agreement are subject to availability under a specified borrowing base and accrue interest at a per annum pricing rate equal to the sum of (i) an applicable base rate or Eurodollar rate and (ii) an applicable margin, in each case, dependent on the applicable type of loan. The initial maturity date of the facility is April 4, 2018 and is subject to two one-year extension options, exercisable at our option. On April 22, 2016, we increased the maximum facility size of our revolving repurchase facility with MetLife by $304.1 million to $1.0 billion and extended the maturity date (inclusive of five one-year extension options, exercisable at our option) to April 22, 2022.

Loan Participations Sold

Loan Participations Sold	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Loan Participations Sold	7. LOAN PARTICIPATIONS SOLD The financing of a loan by the non-recourse sale of a senior interest in the loan through a participation agreement generally does not qualify as a sale under GAAP. Therefore, in the instance of such sales, we present the whole loan as an asset and the loan participation sold as a liability on our consolidated balance sheet until the loan is repaid. The obligation to pay principal and interest on these liabilities is solely based on the performance of the related loan obligation, except in one instance where we entered into a related guarantee agreement for £24.0 million which was translated to $34.5 million as of March 31, 2016. The gross presentation of loan participations sold does not impact stockholders’ equity or net income. The following table details statistics for our loan participations sold ($ in thousands): March 31, 2016 December 31, 2015 Participations Underlying Participations Underlying Sold (1) Loans Sold (1) Loans Number of loans 3 3 3 3 Principal balance (2) $ 478,661 $ 583,589 $ 498,992 $ 608,554 Book value (2) $ 476,894 $ 579,742 $ 497,032 $ 604,321 Weighted-average cash coupon (3) L+2.38 % L+3.93 % L+2.38 % L+3.93 % Weighted-average cost / all-in yield (3) L+2.49 % L+4.16 % L+2.49 % L+4.15 % (1) During the three months ended March 31, 2016 and 2015, we recorded $3.6 million and $4.3 million, respectively, of interest expense related to our loan participations sold, of which $3.5 million and $4.0 million, respectively, was paid in cash. (2) The difference between principal balance and book value of loan participations sold is due to deferred financing costs of $1.8 million and $2.0 million as of March 31, 2016 and December 31, 2015, respectively. (3) Our floating rate loans and related liabilities were indexed to the various benchmark rates relevant in each arrangement in terms of currency and payment frequency. Therefore the net exposure to each benchmark rate is in direct proportion to our net assets indexed to that rate. In addition to cash coupon, cost / all-in yield includes the amortization of deferred origination fees / financing costs.

Convertible Notes, Net

Convertible Notes, Net	3 Months Ended
	Mar. 31, 2016
Text Block [Abstract]
Convertible Notes, Net	8. CONVERTIBLE NOTES, NET In November 2013, we issued $172.5 million of 5.25% convertible senior notes due on December 1, 2018, or Convertible Notes. The Convertible Notes’ issuance costs are amortized through interest expense over the life of the Convertible Notes using the effective interest method. Including this amortization, our all-in cost of the Convertible Notes is 5.87% per annum. The Convertible Notes are convertible at the holders’ option into shares of our class A common stock, only under specific circumstances, prior to the close of business on August 31, 2018, at the applicable conversion rate in effect on the conversion date. Thereafter, the Convertible Notes are convertible at the option of the holder at any time until the second scheduled trading day immediately preceding the maturity date. The Convertible Notes were not convertible as of March 31, 2016. The conversion rate was initially set to equal 34.8943 shares of class A common stock per $1,000 principal amount of Convertible Notes, which was equivalent to an initial conversion price of $28.66 per share of class A common stock, subject to adjustment upon the occurrence of certain events. In the fourth quarter of 2015, as a result of exceeding the cumulative dividend threshold as defined in the Convertible Notes Supplemental Indenture, the conversion rate was adjusted to 35.2653 shares of Class A common stock per $1,000 principal amount of Convertible Notes, which is equivalent to a conversion price of $28.36 per share of class A common stock. We may not redeem the Convertible Notes prior to maturity. As of March 31, 2016, the conversion option value was zero based on the price of our class A common stock of $26.86. In addition, we have the intent and ability to settle the Convertible Notes in cash. As a result, the Convertible Notes did not have any impact on our diluted earnings per share. Upon issuance of the Convertible Notes, we recorded a $9.1 million discount based on the implied value of the conversion option and an assumed effective interest rate of 6.50%, as well as $4.1 million of initial issuance costs. Including the amortization of this discount and the issuance costs, our total cost of the Convertible Notes is 7.16% per annum. During the three months ended March 31, 2016, we incurred total interest on our convertible notes of $3.0 million, of which $2.3 million related to cash coupon and $670,000 related to the amortization of discount and certain issuance costs. During the three months ended March 31, 2015, we incurred total interest on our convertible notes of $2.9 million, of which $2.3 million related to cash coupon and $630,000 related to the amortization of discount and certain issuance costs. As of March 31, 2016, the Convertible Notes were carried on our consolidated balance sheet at $164.7 million, net of an unamortized discount of $7.5 million and deferred financing costs of $281,000. As of December 31, 2015, the Convertible Notes were carried on our consolidated balance sheet at $164.0 million, net of an unamortized discount of $8.2 million and deferred financing costs of $305,000. Accrued interest payable for the Convertible Notes was $3.0 million and $755,000 as of March 31, 2016 and December 31, 2015, respectively. Refer to Note 2 for additional discussion of our accounting policies for the Convertible Notes.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	9. DERIVATIVE FINANCIAL INSTRUMENTS Risk Management Objective of Using Derivatives Certain of our international investments expose us to fluctuations in foreign interest rates and currency exchange rates. These fluctuations may impact the value of our cash receipts and payments in terms of our functional currency, the U.S. Dollar. We use derivative financial instruments to protect the value or fix the amount of certain investments or cash flows in terms of the U.S. Dollar. Certain of our financing transactions expose us to a fixed versus floating rate mismatch between our assets and liabilities. We use derivative financial instruments, which include interest rate caps and swaps, and may also include interest rate options, floors, and other interest rate derivative contracts, to hedge interest rate risk associated with our borrowings where there is potential for an index mismatch. The sole objective of our use of derivative financial instruments is to minimize the risks and/or costs associated with the situations described above. We do not intend to utilize derivatives for speculative or other purposes. The use of derivative financial instruments involves certain risks, including the risk that the counterparties to these contractual arrangements do not perform as agreed. To mitigate this risk, we only enter into derivative financial instruments with counterparties that have appropriate credit ratings and are major financial institutions with which we and our affiliates may also have other financial relationships. We do not anticipate that any of the counterparties will fail to meet their obligations. Net Investment Hedges of Foreign Currency Risk We have made investments in foreign currencies that expose us to fluctuations between the U.S. Dollar and the foreign currency of each such investment. Currently, we use derivative financial instruments to manage, or hedge, the variability in the carrying value of certain of our net investments in consolidated subsidiaries whose functional currencies are not the U.S. Dollar. For derivatives that are designated and qualify as a hedge of our net investment in a foreign currency, the gain or loss on such derivatives is reported in other comprehensive income as part of the cumulative translation adjustment to the extent it is effective. Any ineffective portion of a net investment hedge is recognized in our consolidated statements of operations. For derivatives that are not designated as hedging instruments, gains or losses are recognized in our consolidated statements of operations as incurred. The following table details our outstanding foreign exchange derivatives that were designated as net investment hedges of foreign currency risk (notional amount in thousands): March 31, 2016 December 31, 2015 Foreign Currency Derivatives Number of Notional Foreign Currency Derivatives Number of Notional Sell CAD Forward 2 C$ 154,450 Sell CAD Forward 2 C$ 154,900 Sell GBP Forward 3 £ 108,300 Sell GBP Forward 2 £ 90,400 Sell EUR Forward 1 € 48,000 Sell EUR Forward 1 € 49,000 Cash Flow Hedges of Interest Rate Risk Our objective in using interest rate derivatives is to add stability to interest expense and to manage our exposure to interest rate movements. In addition, we may be required by our lenders to enter into certain derivative contracts related to our credit facilities. To accomplish this objective, we primarily use interest rate caps and swaps. Interest rate caps designated as cash flow hedges involve the receipt of variable-rate amounts if interest rates rise above a certain level in exchange for an up-front premium. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for us making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. The effective portion of changes in the fair value of derivatives designated and qualifying as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged transaction affects net income. These derivatives were used to hedge the variable cash flows associated with floating rate debt. The ineffective portion of the change in fair value of such derivatives is recognized directly in net income. During the three months ended March 31, 2016 and 2015, we did not record any hedge ineffectiveness in our consolidated statements of operations. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on our floating rate debt. During the twelve months following March 31, 2016, we estimate that an additional $1.3 million will be reclassified from other accumulated comprehensive income as an increase to interest expense. The following tables detail our outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (notional amount in thousands): March 31, 2016 Interest Rate Number of Notional Amount Strike Index Wtd.-Avg. Interest Rate Caps 26 $ 1,097,632 2% USD LIBOR 1.1 Interest Rate Caps 7 C$ 483,286 2% CDOR 1.0 Interest Rate Caps 1 € 152,710 2% EURIBOR 0.8 Interest Rate Caps 1 £ 15,142 2% GBP LIBOR 1.1 Interest Rate Swap 1 C$ 14,673 n/a CDOR 4.4 December 31, 2015 Interest Rate Number of Notional Amount Strike Index Wtd.-Avg. Interest Rate Caps 26 $ 1,097,632 2% USD LIBOR 1.3 Interest Rate Caps 7 C$ 483,286 2% CDOR 1.2 Interest Rate Caps 1 € 152,710 2% EURIBOR 1.0 Interest Rate Caps 1 £ 15,142 2% GBP LIBOR 1.3 Non-designated Hedges Derivatives not designated as hedges are not speculative and are used to manage our exposure to interest rate movements and other identified risks, but do not meet the strict hedge accounting requirements of ASC 815 – “Derivatives and Hedging.” Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in our consolidated statement of operations. During the three months ended March 31, 2016, we recorded losses of $976,000, related to non-designated hedges. We did not record any losses related to non-designated hedges during the three months ended March 31, 2015. The following table summarizes our non-designated hedges (notional amount in thousands): March 31, 2016 December 31, 2015 Number of Notional Number of Notional Non-designated Hedges Instruments Amount Non-designated Hedges Instruments Amount Interest Rate Caps 4 C$ 67,303 Interest Rate Caps 4 C$ 67,303 Interest Rate Caps 1 $ 13,387 Interest Rate Caps 1 $ 13,387 Buy GBP / Sell EUR Forward 1 € 12,857 Buy GBP / Sell EUR Forward 1 € 12,857 Buy CAD / Sell USD Forward 1 C$ 950 Buy GBP / Sell USD Forward 1 £ 10,400 Buy USD / Sell CAD Forward 1 C$ 950 Buy USD / Sell GBP Forward 1 £ 10,400 Buy CAD / Sell USD Forward 1 C$ 1,000 Buy USD / Sell CAD Forward 1 C$ 1,000 Valuation of Derivative Instruments The following table summarizes the fair value of our derivative financial instruments ($ in thousands): Fair Value of Derivatives in an Fair Value of Derivatives in a Asset Position (1) Liability Position (2) March 31, 2016 December 31, 2015 March 31, 2016 December 31, 2015 Derivatives designated as hedging instruments: Foreign exchange contracts $ 566 $ 7,999 $ 8,981 $ 511 Interest rate derivatives 45 238 15 — Total derivatives designated as hedging instruments $ 611 $ 8,237 $ 8,996 $ 511 Derivatives not designated as hedging instruments: Foreign exchange contracts $ 14 $ 419 $ 293 $ 937 Interest rate derivatives — 1 — — Total derivatives not designated as hedging instruments $ 14 $ 420 $ 293 $ 937 Total Derivatives $ 625 $ 8,657 $ 9,289 $ 1,448 (1) Included in other assets in our consolidated balance sheets. (2) Included in accounts payable, accrued expenses, and other liabilities in our consolidated balance sheets. The following table presents the effect of our derivative financial instruments on our consolidated statements of operations ($ in thousands): Amount of (Loss) Amount of Gain Recognized in Loss Reclassified from OCI on Derivatives Location of Accumulated OCI into (Effective Portion) Gain (Loss) Income (Effective Portion) Three Months Ended March 31, Reclassified from Accumulated OCI into Income Three Months Ended March 31, Derivatives in Hedging Relationships 2016 2015 (Effective Portion) 2016 2015 Foreign exchange contracts (1) $ (6,470 ) $ 3,337 Interest Expense $ — $ — Interest rate derivatives (196 ) — Interest Expense (27 ) — Total $ (6,666 ) $ 3,337 $ (27 ) $ — (1) During the three months ended March 31, 2016 and 2015, we received net cash settlements of $8.2 million and $4.1 million, respectively, on our foreign currency forward contracts. Those amounts are included as a component of accumulated other comprehensive loss on our consolidated balance sheets. Credit-Risk Related Contingent Features We have entered into agreements with certain of our derivative counterparties that contain provisions where if we were to default on any of our indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, we may also be declared in default on our derivative obligations. In addition, certain of our agreements with our derivative counterparties require that we post collateral to secure net liability positions. As of March 31, 2016, we were in a net asset position of $135,000 with one of our derivative counterparties and a net liability position of $8.8 million with another of our derivative counterparties. While we were in a net liability position with one counterparty as of March 31, 2016, we were not required to post collateral as our liability position was below the threshold defined in our agreement with this counterparty.

Equity

Equity	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Equity	10. EQUITY Stock and Stock Equivalents Authorized Capital As of March 31, 2016, we had the authority to issue up to 300,000,000 shares of stock, consisting of 200,000,000 shares of class A common stock and 100,000,000 shares of preferred stock. Subject to applicable NYSE listing requirements, our board of directors is authorized to cause us to issue additional shares of authorized stock without stockholder approval. In addition, to the extent not issued, currently authorized stock may be reclassified between class A common stock and preferred stock. We did not have any shares of preferred stock issued and outstanding as of March 31, 2016. Class A Common Stock and Deferred Stock Units Holders of shares of our class A common stock are entitled to vote on all matters submitted to a vote of stockholders and are entitled to receive such dividends as may be authorized by our board of directors and declared by us, in all cases subject to the rights of the holders of shares of outstanding preferred stock, if any. We also issue restricted class A common stock under our stock-based incentive plans. Refer to Note 13 for additional discussion of these long-term incentive plans. In addition to our class A common stock, we also issue deferred stock units to certain members of our board of directors in lieu of cash compensation for services rendered. These deferred stock units are non-voting, but carry the right to receive dividends in the form of additional deferred stock units in an amount equivalent to the cash dividends paid to holders of shares of class A common stock. The following table details the movement in our outstanding shares of class A common stock, including restricted class A common stock and deferred stock units: Three Months Ended March 31, Common Stock Outstanding (1) 2016 2015 Beginning balance 93,843,847 58,388,808 Issuance of class A common stock 285 139 Issuance of restricted class A common stock, net 209,798 181,049 Issuance of deferred stock units 7,322 5,414 Ending balance 94,061,252 58,575,410 (1) Deferred stock units held by members of our board of directors totaled 148,843 and 124,333 as of March 31, 2016 and 2015, respectively. Dividend Reinvestment and Direct Stock Purchase Plan On March 25, 2014, we adopted a dividend reinvestment and direct stock purchase plan, under which we registered and reserved for issuance, in the aggregate, 10,000,000 shares of class A common stock. Under the dividend reinvestment component of this plan, our class A common stockholders can designate all or a portion of their cash dividends to be reinvested in additional shares of class A common stock. The direct stock purchase component allows stockholders and new investors, subject to our approval, to purchase shares of class A common stock directly from us. During the three months ended March 31, 2016 and 2015, we issued 285 shares and 139 shares, respectively, of class A common stock under the dividend reinvestment component of the plan. As of March 31, 2016, a total of 9,999,112 shares of class A common stock remain available for issuance under the dividend reinvestment and direct stock purchase plan. At the Market Stock Offering Program On May 9, 2014, we entered into equity distribution agreements, or ATM Agreements, pursuant to which we may sell, from time to time, up to an aggregate sales price of $200.0 million of our class A common stock. Sales of class A common stock made pursuant to the ATM Agreements may be made in negotiated transactions or transactions that are deemed to be “at the market” offerings as defined in Rule 415 under the Securities Act of 1933, as amended. Actual sales will depend on a variety of factors including market conditions, the trading price of our class A common stock, our capital needs, and our determination of the appropriate sources of funding to meet such needs. We did not sell any shares of our class A common stock under the ATM Agreements during the three months ended March 31, 2016 and 2015. As of March 31, 2016, sales of our class A common stock with an aggregate sales price of $188.6 million remain available for issuance under the ATM Agreements. Dividends We generally intend to distribute substantially all of our taxable income, which does not necessarily equal net income as calculated in accordance with GAAP, to our stockholders each year to comply with the REIT provisions of the Internal Revenue Code of 1986, as amended, or the Internal Revenue Code. Our dividend policy remains subject to revision at the discretion of our board of directors. All distributions will be made at the discretion of our board of directors and will depend upon our taxable income, our financial condition, our maintenance of REIT status, applicable law, and other factors as our board of directors deems relevant. On March 15, 2016, we declared a dividend of $0.62 per share, or $58.2 million, which was paid on April 15, 2016, to stockholders of record as of March 31, 2016. The following table details our dividend activity ($ in thousands, except per share data): Three Months Ended March 31, 2016 2015 Dividends declared per share of common stock $ 0.62 $ 0.52 Total dividends declared $ 58,226 $ 30,398 Earnings Per Share We calculate our basic and diluted earnings per share using the two-class method for all periods presented as the unvested shares of our restricted class A common stock qualify as participating securities, as defined by GAAP. These restricted shares have the same rights as our other shares of class A common stock, including participating in any dividends, and therefore have been included in our basic and diluted net income per share calculation. Our Convertible Notes are excluded from dilutive earnings per share as we have the intent and ability to settle these instruments in cash. The following table sets forth the calculation of basic and diluted net income per share of class A common stock based on the weighted-average of both restricted and unrestricted class A common stock outstanding ($ in thousands, except per share data): Three Months Ended March 31, 2016 2015 Net income (1) $ 57,047 $ 35,393 Weighted-average shares outstanding, basic and diluted 94,067,769 58,576,025 Per share amount, basic and diluted $ 0.61 $ 0.60 (1) Represents net income attributable to Blackstone Mortgage Trust, Inc. Other Balance Sheet Items Accumulated Other Comprehensive Loss As of March 31, 2016, total accumulated other comprehensive loss was $33.4 million, primarily representing (i) $51.8 million of cumulative currency translation adjustments on assets and liabilities denominated in foreign currencies and (ii) an offsetting $18.4 million gain related to changes in the fair value of derivative instruments. As of December 31, 2015, total accumulated other comprehensive loss was $32.8 million, primarily representing (i) $57.8 million of cumulative currency translation adjustment on assets and liabilities denominated in foreign currencies and (ii) an offsetting $25.0 million gain related to changes in the fair value of derivative instruments. Non-Controlling Interests The non-controlling interests included on our consolidated balance sheets represent the equity interests in CT Legacy Partners that are not owned by us. A portion of CT Legacy Partners’ consolidated equity and results of operations are allocated to these non-controlling interests based on their pro rata ownership of CT Legacy Partners. As of March 31, 2016, CT Legacy Partners’ total equity was $11.0 million, of which $4.6 million was owned by Blackstone Mortgage Trust, and $6.4 million was allocated to non-controlling interests. As of December 31, 2015, CT Legacy Partners’ total equity was $22.5 million, of which $9.4 million was owned by Blackstone Mortgage Trust, and $13.1 million was allocated to non-controlling interests.

Other Expenses

Other Expenses	3 Months Ended
	Mar. 31, 2016
Other Income and Expenses [Abstract]
Other Expenses	11. OTHER EXPENSES Our other expenses consist of the management and incentive fees we pay to our Manager and our general and administrative expenses. Management and Incentive Fees Pursuant to our management agreement, our Manager earns a base management fee in an amount equal to 1.50% per annum multiplied by our outstanding equity balance, as defined in the management agreement. In addition, our Manager is entitled to an incentive fee in an amount equal to the product of (i) 20% and (ii) the excess of (a) our Core Earnings (as defined in our management agreement) for the previous 12-month period over (b) an amount equal to 7.00% per annum multiplied by our outstanding Equity, provided that our Core Earnings over the prior three-year period (or the period since the date of the first offering of our class A common stock following December 19, 2012, whichever is shorter) is greater than zero. Core Earnings, as defined in our management agreement, is generally equal to our net income (loss) prepared in accordance with GAAP, excluding (i) certain non-cash items (ii) the net income (loss) related to our legacy portfolio and (iii) incentive management fees. During the three months ended March 31, 2016 and 2015, we incurred $9.5 million and $5.5 million, respectively, of management fees payable to our Manager. In addition, during the three months ended March 31, 2016 and 2015, we incurred $4.2 million and $1.2 million, respectively, of incentive fees payable to our Manager. As of March 31, 2016 we had accrued management and incentive fees payable to our Manager of $13.7 million, compared to $14.4 million as of December 31, 2015. General and Administrative Expenses General and administrative expenses consisted of the following ($ in thousands): Three Months Ended March 31, 2016 2015 Professional services $ 890 $ 700 Operating and other costs 869 759 Subtotal 1,759 1,459 Non-cash and CT Legacy Portfolio compensation expenses Management incentive awards plan - CTOPI (1) 170 1,777 Management incentive awards plan - CT Legacy Partners (2) 129 1,030 Restricted class A common stock earned 4,593 3,203 Director stock-based compensation 94 94 Subtotal 4,986 6,104 Total BXMT expenses 6,745 7,563 Expenses of consolidated subsidiaries 50 100 Total general and administrative expenses $ 6,795 $ 7,663 (1) Represents the portion of CTOPI promote revenue accrued under compensation awards. See Note 4 for further discussion. (2) Represents the accrual of amounts payable under the CT Legacy Partners management incentive awards during the period. See below for discussion of the CT Legacy Partners management incentive awards plan. CT Legacy Partners Management Incentive Awards Plan In conjunction with our March 2011 restructuring, we created an employee pool for up to 6.75% of the distributions paid to the common equity holders of CT Legacy Partners (subject to certain caps and priority distributions). Approximately 50% of the pool was 75% vested as of March 31, 2016, with the remainder contingent on continued employment with an affiliate of our Manager and our receipt of distributions from CT Legacy Partners. Of the remaining 50% of the pool, 27% is fully vested as a result of an acceleration event, and 23% vest only upon our receipt of distributions from CT Legacy Partners. We accrue a liability for the amounts due under these grants based on the value of CT Legacy Partners and the periodic vesting of the awards granted. Accrued payables for these awards were $664,000 as of March 31, 2016 and $1.3 million as of December 31, 2015.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	12. INCOME TAXES We elected to be taxed as a REIT, effective January 1, 2003, under the Internal Revenue Code for U.S. federal income tax purposes. We generally must distribute annually at least 90% of our net taxable income, subject to certain adjustments and excluding any net capital gain, in order for U.S. federal income tax not to apply to our earnings that we distribute. To the extent that we satisfy this distribution requirement, but distribute less than 100% of our net taxable income, we will be subject to U.S. federal income tax on our undistributed taxable income. In addition, we will be subject to a 4% nondeductible excise tax if the actual amount that we pay out to our stockholders in a calendar year is less than a minimum amount specified under U.S. federal tax laws. Our qualification as a REIT also depends on our ability to meet various other requirements imposed by the Internal Revenue Code, which relate to organizational structure, diversity of stock ownership, and certain restrictions with regard to the nature of our assets and the sources of our income. Even if we qualify as a REIT, we may be subject to certain U.S. federal income and excise taxes and state and local taxes on our income and assets. If we fail to maintain our qualification as a REIT for any taxable year, we may be subject to material penalties as well as federal, state, and local income tax on our taxable income at regular corporate rates and we would not be able to qualify as a REIT for the subsequent four full taxable years. As of March 31, 2016 and December 31, 2015, we were in compliance with all REIT requirements. During the three months ended March 31, 2016 and 2015, we recorded a current income tax provision of $241,000 and $245,000, respectively, primarily related to various state and local taxes. We did not have any deferred tax assets or liabilities as of March 31, 2016 or December 31, 2015. As a result of our issuance of 25,875,000 shares of class A common stock in May 2013, the availability of our net operating losses, or NOLs, and net capital losses, or NCLs, is generally limited to $2.0 million per annum by change of control provisions promulgated by the Internal Revenue Service with respect to the ownership of Blackstone Mortgage Trust. As of December 31, 2015, we had estimated NOLs of $159.0 million and NCLs of $602,000 available to be carried forward and utilized in current or future periods. If we are unable to utilize our NOLs, they will expire in 2029. If we are unable to utilize our NCLs, they will expire in 2017. As of March 31, 2016, tax years 2012 through 2015 remain subject to examination by taxing authorities.

Stock-Based Incentive Plans

Stock-Based Incentive Plans	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Incentive Plans	13. STOCK-BASED INCENTIVE PLANS We do not have any employees as we are externally managed by our Manager. However, as of March 31, 2016, our Manager, certain individuals employed by an affiliate of our Manager, and certain members of our board of directors were compensated, in part, through the issuance of stock-based instruments. We had stock-based incentive awards outstanding under five benefit plans as of March 31, 2016: (i) our amended and restated 1997 non-employee director stock plan, or 1997 Plan; (ii) our 2007 long-term incentive plan, or 2007 Plan; (iii) our 2011 long-term incentive plan, or 2011 Plan; (iv) our 2013 stock incentive plan, or 2013 Plan; and (v) our 2013 manager incentive plan, or 2013 Manager Plan. We refer to our 1997 Plan, our 2007 Plan, and our 2011 Plan collectively as our Expired Plans and we refer to our 2013 Plan and 2013 Manager Plan collectively as our Current Plans. Our Expired Plans have expired and no new awards may be issued under them. Under our Current Plans, a maximum of 2,160,106 shares of our class A common stock may be issued to our Manager, our directors and officers, and certain employees of affiliates of our Manager. As of March 31, 2016, there were 47,782 shares available under the Current Plans. The following table details the movement in our outstanding shares of restricted class A common stock and the weighted-average grant date fair value per share: Restricted Class A Weighted-Average Grant Date Fair Balance as of December 31, 2015 1,114,908 $ 27.64 Granted 245,225 26.51 Vested (124,709 ) 27.01 Forfeited (35,427 ) 27.49 Balance as of March 31, 2016 1,199,997 $ 27.47 These shares generally vest in quarterly installments over a three-year period, pursuant to the terms of the respective award agreements and the terms of the Current Plans. The 1,199,997 shares of restricted class A common stock outstanding as of March 31, 2016 will vest as follows: 517,076 shares will vest in 2016; 446,779 shares will vest in 2017; and 236,142 shares will vest in 2018. As of March 31, 2016, total unrecognized compensation cost relating to nonvested share-based compensation arrangements was $30.3 million. This cost is expected to be recognized over a weighted average period of 1.2 years from March 31, 2016.

Fair Values

Fair Values	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Values	14. FAIR VALUES Assets and Liabilities Measured at Fair Value The following table summarizes our assets and liabilities measured at fair value on a recurring basis ($ in thousands): March 31, 2016 December 31, 2015 Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Fair Value Assets Derivatives $ — $ 625 $ — $ 625 $ — $ 8,657 $ — $ 8,657 Other assets (1) $ — $ 1,605 $ 10,221 $ 11,826 $ — $ 1,659 $ 12,561 $ 14,220 Liabilities Derivatives $ — $ 9,289 $ — $ 9,289 $ — $ 1,448 $ — $ 1,448 (1) Other assets include loans, securities, equity investments, and other receivables measured at fair value. The following table reconciles the beginning and ending balances of assets measured at fair value on a recurring basis using Level 3 inputs ($ in thousands): Three Months Ended March 31, 2016 2015 January 1, $ 12,561 $ 47,507 Proceeds from investment realizations (2,406 ) (15,038 ) Adjustments to fair value included in earnings Gain on investments at fair value 66 17,498 March 31, $ 10,221 $ 49,967 As of March 31, 2016, we had $10.2 million of assets measured using Level 3 inputs, which primarily consist of commercial mortgage backed securities that are valued using market quotes received from financial sources that transact in such securities. Refer to Note 2 for further discussion regarding fair value measurement. Fair Value of Financial Instruments As discussed in Note 2, GAAP requires disclosure of fair value information about financial instruments, whether or not recognized in the statement of financial position, for which it is practicable to estimate that value. The following table details the carrying amount, face amount, and fair value of the financial instruments described in Note 2 ($ in thousands): March 31, 2016 December 31, 2015 Carrying Face Fair Carrying Face Fair Amount Amount Value Amount Amount Value Financial assets Cash and cash equivalents $ 110,622 $ 110,622 $ 110,622 $ 96,450 $ 96,450 $ 96,450 Restricted cash 434 434 434 9,556 9,556 9,556 Loans receivable, net 9,313,763 9,346,247 9,368,855 9,077,007 9,108,361 9,121,732 Financial liabilities Secured debt agreements 6,311,659 6,329,385 6,329,385 6,116,105 6,131,751 6,131,751 Loan participations sold 476,894 478,661 478,661 497,032 498,992 498,992 Convertible notes, net 164,696 172,500 179,486 164,026 172,500 171,344 Estimates of fair value for cash, cash equivalents and convertible notes are measured using observable, quoted market prices, or Level 1 inputs. All other fair value significant estimates are measured using unobservable inputs, or Level 3 inputs. See Note 2 for further discussion regarding fair value measurement of certain of our assets and liabilities.

Transactions with Related Parti

Transactions with Related Parties	3 Months Ended
	Mar. 31, 2016
Related Party Transactions [Abstract]
Transactions with Related Parties	15. TRANSACTIONS WITH RELATED PARTIES We are managed by our Manager pursuant to a management agreement, the current term of which expires on December 19, 2016, and will be automatically renewed for a one-year term each anniversary thereafter unless earlier terminated. As of March 31, 2016, our consolidated balance sheet included $13.7 million of accrued management and incentive fees payable to our Manager. During the three months ended March 31, 2016, we paid $14.4 million, of management and incentive fees to our Manager, compared to $6.3 million during the same period of 2015. In addition, during the three months ended March 31, 2016, we reimbursed our Manager for $320,000 of expenses incurred on our behalf compared to $139,000 during the same period of 2015. As of March 31, 2016, our consolidated balance sheet includes $44,000 of preferred distributions payable by CT Legacy Partners to an affiliate of our Manager, compared to $83,000 as of December 31, 2015. During the three months ended March 31, 2016, CT Legacy Partners made aggregate preferred distributions of $224,000 to such affiliate, compared to $452,000 during the same period of 2015. During the years ended December 31, 2015, 2014, and 2013, we issued 334,758, 337,941, and 339,431 shares of restricted class A common stock to our Manager under the 2013 Manager Plan, which had a grant date fair value of $9.3 million, $9.4 million, and $8.5 million, respectively. We did not issue any shares of restricted class A common stock to our Manager during the three months ended March 31, 2016. The shares of restricted class A common stock vest ratably in quarterly installments over three years from the date of issuance. During the three months ended March 31, 2016 and 2015, we recorded non-cash expense related to these shares of $2.1 million and $1.4 million, respectively. Refer to Note 13 for further discussion of our restricted class A common stock. On May 8, 2015, a joint venture of CT Legacy Partners, certain affiliates of our Manager, and other non-affiliated parties, which we refer to as the Three-Pack JV, sold a hotel portfolio it owned to an investment vehicle managed by an affiliate of our Manager. We consented to the sale of the hotel portfolio by the Three-Pack JV, which will result in the ultimate liquidation of the Three-Pack JV and distribution of net sale proceeds to CT Legacy Partners in respect of its investment therein. An aggregate of $40.1 million of net sales proceeds has been received to date by CT Legacy Partners, of which $2.4 million was received during the three months ended March 31, 2016. As a result of the sale transaction, employees of our Manager, including certain of our executive officers, received incentive compensation payments totaling $2.7 million under the CT Legacy Partners Management Incentive Awards Plan, of which $2.5 million was paid during 2015, and the remaining $162,000 was paid during the three months ended March 31, 2016. All of the income from the sale of the hotel portfolio and related compensation expense was recorded during 2015. See Note 11 for further discussion of the CT Legacy Partners Management Incentive Awards Plan. During the three months ended March 31, 2016 and 2015, we incurred $90,000 and $75,000, respectively, of expenses for various administrative and capital market data services to third-party service providers that are affiliates of our Manager.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	16. COMMITMENTS AND CONTINGENCIES Unfunded Commitments Under Loans Receivable As of March 31, 2016, we had unfunded commitments of $965.1 million related to 71 loans receivable, which amounts will generally be funded to finance lease-related or capital expenditures by our borrowers. These future commitments will expire variously over the next four years. Income Tax Audits of CTIMCO The Internal Revenue Service and the State of New York are separately undergoing examinations of the income tax returns for the years ended December 31, 2012 and 2011 of our former subsidiary, CT Investment Management Co., LLC, or CTIMCO. The examinations are on-going, and no final adjustments have been made or agreed to as a result of these examinations. When we sold CTIMCO in December 2012, we provided certain indemnifications related to its operations, and any amounts determined to be owed by CTIMCO would ultimately be paid by us. As of March 31, 2016, there were no reserves recorded for the CTIMCO examinations. Litigation From time to time, we may be involved in various claims and legal actions arising in the ordinary course of business. As of March 31, 2016, we were not involved in any material legal proceedings. Board of Directors’ Compensation As of March 31, 2016, of the eight members of our board of directors, our five independent directors are entitled to annual compensation of $125,000 each. The other three board members, including our chairman and our chief executive officer, serve as directors with no compensation. As of March 31, 2016, the annual compensation for our directors was paid 40% in cash and 60% in the form of deferred stock units. In addition, the member of our board of directors that serves as the chairperson of the audit committee of our board of directors receives additional annual cash compensation of $12,000. Compensation to the board of directors is payable in four equal quarterly installments.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	17. SUBSEQUENT EVENTS On April 4, 2016, we entered into a $125.0 million full recourse revolving credit agreement with Barclays which is designed to finance first mortgage originations for up to six months as a bridge to term financing or syndication. Advances under the credit agreement are subject to availability under a specified borrowing base and accrue interest at a per annum pricing rate equal to the sum of (i) an applicable base rate or Eurodollar rate and (ii) an applicable margin, in each case, dependent on the applicable type of loan. The initial maturity date of the facility is April 4, 2018 and is subject to two one-year extension options, exercisable at our option. On April 22, 2016, we increased the maximum facility size of our revolving repurchase facility with MetLife by $304.1 million to $1.0 billion and extended the maturity date (inclusive of five one-year extension options, exercisable at our option) to April 22, 2022.

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements include, on a consolidated basis, our accounts, the accounts of our wholly-owned subsidiaries, majority-owned subsidiaries, and variable interest entities, or VIEs, of which we are the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. Certain of the assets and credit of our consolidated subsidiaries are not available to satisfy the debt or other obligations of us, our affiliates, or other entities. One of our subsidiaries, CT Legacy Partners, LLC, or CT Legacy Partners, accounts for its operations in accordance with industry-specific GAAP accounting guidance for investment companies, pursuant to which it reports its investments at fair value. We have retained this accounting treatment in consolidation and, accordingly, report the loans and other investments of CT Legacy Partners at fair value on our consolidated balance sheets. Certain reclassifications have been made in the presentation of the prior period consolidated statement of cash flows to conform to the current period presentation.
Principles of Consolidation	Principles of Consolidation We consolidate all entities that we control through either majority ownership or voting rights. In addition, we consolidate all VIEs of which we are considered the primary beneficiary. VIEs are defined as entities in which equity investors (i) do not have the characteristics of a controlling financial interest and/or (ii) do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from other parties. The entity that consolidates a VIE is known as its primary beneficiary and is generally the entity with (i) the power to direct the activities that most significantly affect the VIE’s economic performance and (ii) the right to receive benefits from the VIE or the obligation to absorb losses of the VIE that could be significant to the VIE. As of both March 31, 2016 and December 31, 2015, we did not consolidate any VIEs.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may ultimately differ from those estimates.
Revenue Recognition	Revenue Recognition Interest income from our loans receivable is recognized over the life of each investment using the effective interest method and is recorded on the accrual basis. Recognition of fees, premiums, and discounts associated with these investments is deferred until the loan is advanced and is then recorded over the term of the loan as an adjustment to yield. Income accrual is generally suspended for loans at the earlier of the date at which payments become 90 days past due or when, in the opinion of our Manager, recovery of income and principal becomes doubtful. Income is then recorded on the basis of cash received until accrual is resumed when the loan becomes contractually current and performance is demonstrated to be resumed. In addition, for loans we originate, the related origination expenses are deferred and recognized as a component of interest income, however expenses related to loans we acquire are included in general and administrative expenses as incurred.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents represent cash held in banks, cash on hand, and liquid investments with original maturities of three months or less. We may have bank balances in excess of federally insured amounts; however, we deposit our cash and cash equivalents with high credit-quality institutions to minimize credit risk exposure. We have not experienced, and do not expect, any losses on our cash or cash equivalents.
Restricted Cash	Restricted Cash We classify the cash balances held by CT Legacy Partners as restricted because, while these cash balances are available for use by CT Legacy Partners for its operations, they cannot be used by us until our allocable share is distributed from CT Legacy Partners and cannot be commingled with any of our unrestricted cash balances.
Loans Receivable and Provision for Loan Losses	Loans Receivable and Provision for Loan Losses We originate and purchase commercial real estate debt and related instruments generally to be held as long-term investments at amortized cost. We are required to periodically evaluate each of these loans for possible impairment. Impairment is indicated when it is deemed probable that we will not be able to collect all amounts due to us pursuant to the contractual terms of the loan. If a loan is determined to be impaired, we write down the loan through a charge to the provision for loan losses. Impairment of these loans, which are collateral dependent, is measured by comparing the estimated fair value of the underlying collateral, less costs to sell, to the book value of the respective loan. These valuations require significant judgments, which include assumptions regarding capitalization rates, leasing, creditworthiness of major tenants, occupancy rates, availability of financing, exit plan, loan sponsorship, actions of other lenders, and other factors deemed necessary by our Manager. Actual losses, if any, could ultimately differ from these estimates. Our Manager performs a quarterly review of our portfolio of loans. In conjunction with this review, our Manager assesses the risk factors of each loan, and assigns a risk rating based on a variety of factors, including, without limitation, loan-to-value ratio, or LTV, debt yield, property type, geographic and local market dynamics, physical condition, cash flow volatility, leasing and tenant profile, loan structure and exit plan, and project sponsorship. Based on a 5-point scale, our loans are rated “1” through “5,” from less risk to greater risk, which ratings are defined as follows: 1 - Very Low Risk 2 - Low Risk 3 - Medium Risk 4 - High Risk/Potential for Loss: 5 - Impaired/Loss Likely: During the second quarter of 2015, we acquired a portfolio of loans from General Electric Capital Corporation and certain of its affiliates, or the GE portfolio, for a total purchase price of $4.7 billion. We allocated the aggregate purchase price between each loan based on its fair value relative to the overall portfolio, which allocation resulted in purchase discounts or premiums determined on an asset-by-asset basis. Each loan will accrete from its allocated purchase price to its expected collection value over the life of the loan, consistent with the other loans in our portfolio.
Equity Investments in Unconsolidated Subsidiaries	Equity Investments in Unconsolidated Subsidiaries Our carried interest in CT Opportunity Partners I, LP, or CTOPI, is accounted for using the equity method. CTOPI’s assets and liabilities are not consolidated into our financial statements due to our determination that (i) it is not a VIE and (ii) the other investors in CTOPI have sufficient rights to preclude consolidation by us. As such, we report our allocable percentage of the net assets of CTOPI on our consolidated balance sheets. The recognition of income from CTOPI is generally deferred until cash is collected or appropriate contingencies have been eliminated.
Derivative Financial Instruments	Derivative Financial Instruments We classify all derivative financial instruments as either other assets or other liabilities on our consolidated balance sheets at fair value. On the date we enter into a derivative contract, we designate each contract as (i) a hedge of a net investment in a foreign operation, or net investment hedge, (ii) a hedge of a forecasted transaction or of the variability of cash flows to be received or paid related to a recognized asset or liability, or cash flow hedge, (iii) a hedge of a recognized asset or liability, or fair value hedge, or (iv) a derivative instrument not to be designated as a hedging derivative, or freestanding derivative. For all derivatives other than those designated as freestanding derivatives, we formally document our hedge relationships and designation at inception. This documentation includes the identification of the hedging instruments and the hedged items, its risk management objectives, strategy for undertaking the hedge transaction and our evaluation of the effectiveness of its hedged transaction. On a quarterly basis, we also formally assess whether the derivative we designated in each hedging relationship is expected to be, and has been, highly effective in offsetting changes in the value or cash flows of the hedged items. If it is determined that a derivative is not highly effective at hedging the designated exposure, hedge accounting is discontinued. Changes in the fair value of the effective portion of our hedges are reflected in accumulated other comprehensive income (loss) on our consolidated financial statements. Changes in the fair value of the ineffective portion of our hedges are included in net income. Amounts are reclassified out of accumulated other comprehensive income (loss) and into net income when the hedged item is either sold or substantially liquidated. To the extent a derivative does not qualify for hedge accounting and is deemed a freestanding derivative, the changes in its value are included in net income.
Repurchase Agreements	Repurchase Agreements We record investments financed with repurchase agreements as separate assets and the related borrowings under any repurchase agreements are recorded as separate liabilities on our consolidated balance sheets. Interest income earned on the investments and interest expense incurred on the repurchase agreements are reported separately on our consolidated statements of operations.
Loan Participations Sold	Loan Participations Sold Loan participations sold represent senior interests in certain loans that we sold, however we present such loan participations sold as liabilities because these arrangements do not qualify as sales under GAAP. These participations are non-recourse and remain on our consolidated balance sheet until the loan is repaid. The gross presentation of loan participations sold does not impact stockholders’ equity or net income.
Convertible Notes	Convertible Notes The “Debt with Conversion and Other Options” Topic of the Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, requires the liability and equity components of convertible debt instruments that may be settled in cash upon conversion, including partial cash settlement, to be separately accounted for in a manner that reflects the issuer’s nonconvertible debt borrowing rate. The initial proceeds from the sale of convertible notes are allocated between a liability component and an equity component in a manner that reflects interest expense at the rate of similar nonconvertible debt that could have been issued at such time. The equity component represents the excess initial proceeds received over the fair value of the liability component of the notes as of the date of issuance. We measured the estimated fair value of the debt component of our convertible notes as of the issuance date based on our nonconvertible debt borrowing rate. The equity component of the convertible notes is reflected within additional paid-in capital on our consolidated balance sheet, and the resulting debt discount is amortized over the period during which the convertible notes are expected to be outstanding (through the maturity date) as additional non-cash interest expense. The additional non-cash interest expense attributable to the convertible notes will increase in subsequent periods through the maturity date as the notes accrete to their par value over the same period.
Deferred Financing Costs	Deferred Financing Costs The deferred financing costs that are included as a reduction in the net book value of the related liability on our consolidated balance sheets include issuance and other costs related to our debt obligations. These costs are amortized as interest expense using the effective interest method over the life of the related obligations.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The “Fair Value Measurements and Disclosures” Topic, or ASC 820, defines fair value, establishes a framework for measuring fair value, and requires certain disclosures about fair value measurements under GAAP. Specifically, this guidance defines fair value based on exit price, or the price that would be received upon the sale of an asset or the transfer of a liability in an orderly transaction between market participants at the measurement date. ASC 820 also establishes a fair value hierarchy that prioritizes and ranks the level of market price observability used in measuring financial instruments. Market price observability is affected by a number of factors, including the type of financial instrument, the characteristics specific to the financial instrument, and the state of the marketplace, including the existence and transparency of transactions between market participants. Financial instruments with readily available quoted prices in active markets generally will have a higher degree of market price observability and a lesser degree of judgment used in measuring fair value. Financial instruments measured and reported at fair value are classified and disclosed based on the observability of inputs used in the determination, as follows: • Level 1: Generally includes only unadjusted quoted prices that are available in active markets for identical financial instruments as of the reporting date. • Level 2: Pricing inputs include quoted prices in active markets for similar instruments, quoted prices in less active or inactive markets for identical or similar instruments where multiple price quotes can be obtained, and other observable inputs, such as interest rates, yield curves, credit risks, and default rates. • Level 3: Pricing inputs are unobservable for the financial instruments and include situations where there is little, if any, market activity for the financial instrument. These inputs require significant judgment or estimation by management of third parties when determining fair value and generally represent anything that does not meet the criteria of Levels 1 and 2. The estimated value of each asset reported at fair value using Level 3 inputs is determined by an internal committee composed of members of senior management of our Manager, including our Chief Executive Officer, Chief Financial Officer, and other senior officers. Certain of our other assets are reported at fair value either (i) on a recurring basis, as of each quarter-end, or (ii) on a nonrecurring basis, as a result of impairment or other events. Our assets that are recorded at fair value are discussed further in Note 14. We generally value our assets recorded at fair value by either (i) discounting expected cash flows based on assumptions regarding the collection of principal and interest and estimated market rates, or (ii) obtaining assessments from third-party dealers. For collateral-dependent loans that are identified as impaired, we measure impairment by comparing our Manager’s estimation of fair value of the underlying collateral, less costs to sell, to the book value of the respective loan. These valuations may require significant judgments, which include assumptions regarding capitalization rates, leasing, creditworthiness of major tenants, occupancy rates, availability of financing, exit plan, loan sponsorship, actions of other lenders, and other factors deemed necessary by our Manager. We are also required by GAAP to disclose fair value information about financial instruments, that are not otherwise reported at fair value in our consolidated balance sheet, to the extent it is practicable to estimate a fair value for those instruments. These disclosure requirements exclude certain financial instruments and all non-financial instruments. The following methods and assumptions are used to estimate the fair value of each class of financial instruments, for which it is practicable to estimate that value: • Cash and cash equivalents: The carrying amount of cash on deposit and in money market funds approximates fair value. • Restricted cash: The carrying amount of restricted cash approximates fair value. • Loans receivable, net: The fair values for these loans were estimated by our Manager based on discounted cash flow methodology taking into consideration factors, including capitalization rates, discount rates, leasing, occupancy rates, availability and cost of financing, exit plan, sponsorship, actions of other lenders, and indications of market value from other market participants. • Derivative financial instruments: The fair value of our foreign currency contracts and interest rates caps was valued using advice from a third party derivative specialist, based on contractual cash flows and observable inputs comprising foreign currency rates and credit spreads. • Secured debt agreements: The fair values for these instruments were estimated based on the rate at which a similar credit facility would have currently priced. • Loan participations sold: The fair value of these instruments were estimated based on the value of the related loan receivable asset. • Convertible notes, net: The convertible notes are actively traded and their fair values were obtained using quoted market prices for these instruments.
Income Taxes	Income Taxes Our financial results generally do not reflect provisions for current or deferred income taxes on our REIT taxable income. We believe that we operate in a manner that will continue to allow us to be taxed as a REIT and, as a result, we generally do not expect to pay substantial corporate level taxes other than those payable by our taxable REIT subsidiaries. If we were to fail to meet these requirements, we may be subject to federal, state, and local income tax on current and past income, and penalties. Refer to Note 12 for additional information.
Stock-Based Compensation	Stock-Based Compensation Our stock-based compensation consists of awards issued to our Manager and certain of its employees that vest over the life of the awards as well as deferred stock units issued to certain members of our Board of Directors. Stock-based compensation expense is recognized for these awards in net income on a variable basis over the applicable vesting period of the awards, based on the value of our class A common stock. Refer to Note 13 for additional information.
Earnings per Share	Earnings per Share Basic earnings per share, or Basic EPS, is computed in accordance with the two-class method and is based on the net earnings allocable to our class A common stock, including restricted class A common stock and deferred stock units, divided by the weighted-average number of shares of class A common stock, including restricted class A common stock and deferred stock units outstanding during the period. Our restricted class A common stock is considered a participating security, as defined by GAAP, and has been included in our Basic EPS under the two-class method as these restricted shares have the same rights as our other shares of class A common stock, including participating in any gains or losses. Diluted earnings per share, or Diluted EPS, is determined using the treasury stock method, and is based on the net earnings allocable to our class A common stock, including restricted class A common stock and deferred stock units, divided by the weighted-average number of shares of class A common stock, including restricted class A common stock and deferred stock units. Refer to Note 10 for additional discussion of earnings per share.
Foreign Currency	Foreign Currency In the normal course of business, we enter into transactions not denominated in United States, or U.S., dollars. Foreign exchange gains and losses arising on such transactions are recorded as a gain or loss in our consolidated statements of operations. In addition, we consolidate entities that have a non-U.S. dollar functional currency. Non-U.S. dollar denominated assets and liabilities are translated to U.S. dollars at the exchange rate prevailing at the reporting date and income, expenses, gains, and losses are translated at the average exchange rate over the applicable period. Cumulative translation adjustments arising from the translation of non-U.S. dollar denominated subsidiaries are recorded in other comprehensive income.
Underwriting Commissions and Offering Costs	Underwriting Commissions and Offering Costs Underwriting commissions and offering costs incurred in connection with common stock offerings are reflected as a reduction of additional paid-in capital. Costs incurred that are not directly associated with the completion of a common stock offering are expensed when incurred.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In March 2016, the FASB issued ASU 2016-09, “Improvements to Employee Share-Based Payment Accounting (Topic 718),” or ASU 2016-09. ASU 2016-09 requires all income tax effects of share-based payment awards to be recognized in the income statement when the awards vest or are settled. ASU 2016-09 also allows an employer to repurchase more of an employee’s shares for tax withholding purposes than is permitted under current guidance without triggering liability accounting. Finally, ASU 2016-09 allows a policy election to account for forfeitures as they occur. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. We do not anticipate that the adoption of ASU 2016-09 will have a material impact on our consolidated financial statements. In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements – Going Concern (Subtopic 2015-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern,” or ASU 2014-15. ASU 2014-15 introduces an explicit requirement for management to assess and provide certain disclosures if there is substantial doubt about an entity’s ability to continue as a going concern. ASU 2014-15 is effective for the annual period ending after December 15, 2016. We do not anticipate that the adoption of ASU 2014-15 will have a material impact on our consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606) ,

Loans Receivable (Tables)

Loans Receivable (Tables)	3 Months Ended
	Mar. 31, 2016
Receivables [Abstract]
Overall Statistics for Loans Receivable Portfolio	The following table details overall statistics for our loans receivable portfolio as of March 31, 2016 ($ in thousands): Floating Rate Fixed Rate Total Number of loans 96 30 126 Principal balance $ 7,397,918 $ 1,948,329 $ 9,346,247 Net book value $ 7,362,047 $ 1,951,716 $ 9,313,763 Unfunded loan commitments (1) $ 962,425 $ 2,715 $ 965,140 Weighted-average cash coupon (2) L+4.08 % 5.64 % 4.82 % Weighted-average all-in yield (2) L+4.51 % 5.73 % 5.18 % Weighted-average maximum maturity (years) (3) 3.2 2.2 3.0 (1) Unfunded commitments will primarily be funded to finance property improvements or lease-related expenditures by the borrowers. These future commitments will expire over the next four years. (2) As of March 31, 2016, our floating rate loans were indexed to various benchmark rates, with 83% of floating rate loans indexed to USD LIBOR. In addition, $146.9 million of our floating rate loans earned interest based on floors that are above the applicable index, with an average floor of 1.80%, as of March 31, 2016. In addition to cash coupon, all-in yield includes the amortization of deferred origination fees, loan origination costs, purchase discounts, and accrual of both extension and exit fees. Cash coupon and all-in yield for the total portfolio assume applicable floating benchmark rate for weighted-average calculation. (3) Maximum maturity assumes all extension options are exercised by the borrower, however our loans may be repaid prior to such date. As of March 31, 2016, 63% of our loans were subject to yield maintenance or other prepayment restrictions and 37% were open to repayment by the borrower without penalty. The following table details overall statistics for our loans receivable portfolio as of December 31, 2015 ($ in thousands): Floating Rate Fixed Rate Total Number of loans 92 33 125 Principal balance $ 7,098,180 $ 2,010,181 $ 9,108,361 Net book value $ 7,064,279 $ 2,012,728 $ 9,077,007 Unfunded loan commitments (1) $ 696,276 $ 4,382 $ 700,658 Weighted-average cash coupon (2) L+4.09 % 5.63 % 4.84 % Weighted-average all-in yield (2) L+4.49 % 5.78 % 5.18 % Weighted-average maximum maturity (years) (3) 3.3 2.6 3.1 (1) Unfunded commitments will primarily be funded to finance property improvements or lease-related expenditures by the borrowers. These future commitments will expire over the next four years. (2) As of December 31, 2015, our floating rate loans were indexed to various benchmark rates, with 84% of floating rate loans indexed to USD LIBOR. In addition, $147.9 million of our floating rate loans earned interest based on floors that are above the applicable index, with an average floor of 1.80%, as of December 31, 2015. In addition to cash coupon, all-in yield includes the amortization of deferred origination fees, loan origination costs, purchase discounts, and accrual of both extension and exit fees. Cash coupon and all-in yield for the total portfolio assume applicable floating benchmark rate for weighted-average calculation. (3) Maximum maturity assumes all extension options are exercised by the borrower, however our loans may be repaid prior to such date. As of December 31, 2015, 64% of our loans were subject to yield maintenance or other prepayment restrictions and 36% were open to repayment by the borrower without penalty.
Activity Relating to Loans Receivable Portfolio	Activity relating to our loans receivable portfolio was as follows ($ in thousands): Principal Deferred Fees / Net Book Balance Other Items (1) Value December 31, 2015 $ 9,108,361 $ (31,354 ) $ 9,077,007 Loan originations and fundings 586,066 — 586,066 Loan repayments (375,374 ) — (375,374 ) Unrealized gain on foreign currency translation 27,194 340 27,534 Deferred fees and other items (1) — (10,424 ) (10,424 ) Amortization of fees and other items (1) — 8,954 8,954 March 31, 2016 $ 9,346,247 $ (32,484 ) $ 9,313,763 (1) Other items primarily consist of purchase discounts or premiums, exit fees, and deferred origination expenses.
Types of Loans in Loan Portfolio, as well as Property Type and Geographic Distribution of Properties Securing these Loans	The tables below detail the types of loans in our loan portfolio, as well as the property type and geographic distribution of the properties securing these loans ($ in thousands): March 31, 2016 December 31, 2015 Asset Type Net Book Value Percentage Net Book Value Percentage Senior loans (1) $ 9,076,146 97 % $ 8,847,044 97 % Subordinate loans (2) 237,617 3 229,963 3 $ 9,313,763 100 % $ 9,077,007 100 % Property Type Net Book Value Percentage Net Book Value Percentage Office $ 4,164,413 45 % $ 4,039,521 45 % Hotel 1,871,777 20 1,903,544 21 Manufactured housing 1,349,509 14 1,361,572 15 Retail 802,471 9 684,944 8 Multifamily 551,701 6 580,112 6 Condominium 205,800 2 127,434 1 Other 368,092 4 379,880 4 $ 9,313,763 100 % $ 9,077,007 100 % Geographic Location Net Book Value Percentage Net Book Value Percentage United States Northeast $ 2,190,170 23 % $ 2,260,392 25 % Southeast 1,802,381 18 1,836,766 20 West 1,354,256 15 1,125,238 12 Southwest 953,204 10 1,035,839 11 Midwest 703,285 8 616,964 7 Northwest 350,545 4 390,307 4 Subtotal 7,353,841 78 7,265,506 79 International United Kingdom 982,404 11 888,998 10 Canada 604,343 6 561,023 6 Germany 242,200 3 235,294 3 Spain 69,180 1 66,661 1 Netherlands 61,795 1 59,525 1 Subtotal 1,959,922 22 1,811,501 21 Total $ 9,313,763 100 % $ 9,077,007 100 % (1) Includes senior mortgages and similar credit quality loans, including related contiguous subordinate loans, and pari passu participations in senior mortgage loans. (2) Includes mezzanine loans and subordinate interests in mortgages.
Principal Balance and Net Book Value of Loans Receivable Based on Internal Risk Ratings	The following table allocates the principal balance and net book value of our loans receivable based on our internal risk ratings ($ in thousands): March 31, 2016 December 31, 2015 Risk Rating Number of Loans Principal Balance Net Book Value Number of Loans Principal Balance Net Book Value 1 13 $ 915,990 $ 911,350 12 $ 925,443 $ 919,991 2 72 5,743,148 5,729,541 77 5,948,922 5,929,447 3 40 2,633,081 2,619,223 35 2,120,713 2,114,531 4 1 54,028 53,649 1 113,283 113,038 5 — — — — — — 126 $ 9,346,247 $ 9,313,763 125 $ 9,108,361 $ 9,077,007

Equity Investments in Unconso27

Equity Investments in Unconsolidated Subsidiaries (Tables)	3 Months Ended
	Mar. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Activity Relating to Our Equity Investments in Unconsolidated Subsidiaries	As of March 31, 2016, our equity investments in unconsolidated subsidiaries consisted solely of our carried interest in CTOPI, a fund sponsored and managed by an affiliate of our Manager. Activity relating to our equity investments in unconsolidated subsidiaries was as follows ($ in thousands): CTOPI Carried Interest Total as of December 31, 2015 $ 9,441 Distributions (6,837 ) Income allocation (1) 158 Total as of March 31, 2016 $ 2,762 (1) In instances where we have not received cash or all appropriate contingencies have not been eliminated, we have deferred the recognition of promote revenue allocated to us from CTOPI in respect of our carried interest in CTOPI, and recorded an offsetting liability as a component of accounts payable, accrued expenses, and other liabilities on our consolidated balance sheets.

Other Assets (Tables)

Other Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Summary of Components of Other Assets	The following table details the components of our other assets ($ in thousands): March 31, December 31, 2016 2015 Principal and interest payments held by servicer (1) $ 77,145 $ 123,160 Accrued interest receivable 36,901 37,161 Real estate debt and equity investments, at fair value (2) 11,826 14,220 Prepaid expenses 828 890 Prepaid taxes 485 525 Other — 8,163 Total $ 127,185 $ 184,119 (1) Represents loan principal and interest payments held by our third-party loan servicer as of the balance sheet date which were remitted to us during the subsequent remittance cycle. (2) Real estate debt and equity investments consists of assets held by CT Legacy Partners and are measured at fair value.

Secured Debt Agreements (Tables

Secured Debt Agreements (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Schedule of Secured Debt Agreements	The following table details our secured debt agreements ($ in thousands): Secured Debt Agreements Borrowings Outstanding March 31, 2016 December 31, 2015 Revolving repurchase facilities $ 3,252,405 $ 2,858,714 GE portfolio acquisition facility 2,919,946 3,161,291 Asset-specific financings 157,034 111,746 Total secured debt agreements $ 6,329,385 $ 6,131,751 Deferred financing costs (1) (17,726 ) (15,646 ) Net book value of secured debt $ 6,311,659 $ 6,116,105 (1) Costs incurred in connection with our secured debt agreements are recorded on our consolidated balance sheet when incurred and recognized as a component of interest expense over the life of each related agreement.
Revolving Repurchase Facilities	The following table details our revolving repurchase facilities ($ in thousands): March 31, 2016 Maximum Collateral Repurchase Borrowings Lender Facility Size (1) Assets (2) Potential (3) Outstanding Available (3) Wells Fargo (4) $ 1,172,000 $ 1,286,632 $ 1,005,043 $ 871,485 $ 133,558 Bank of America 750,000 847,304 666,275 618,944 47,331 JP Morgan (5) 762,500 796,344 638,390 564,605 73,785 MetLife 695,945 767,290 594,369 466,107 128,262 Citibank (6) 537,500 590,281 455,716 377,251 78,465 Morgan Stanley (7) 359,450 387,317 301,005 298,082 2,923 Société Générale (8) 453,520 69,914 55,931 55,931 — $ 4,730,915 $ 4,745,082 $ 3,716,729 $ 3,252,405 $ 464,324 December 31, 2015 Maximum Collateral Repurchase Borrowings Lender Facility Size (1) Assets (2) Potential (3) Outstanding Available (3) Wells Fargo (4) $ 1,172,000 $ 1,044,860 $ 817,562 $ 685,485 $ 132,077 Bank of America 750,000 840,884 665,861 618,944 46,917 JP Morgan (5) 787,047 864,630 689,705 596,533 93,172 MetLife 750,000 593,273 462,849 324,587 138,262 Citibank (6) 537,500 604,781 461,532 370,194 91,338 Morgan Stanley (7) 370,400 273,280 212,050 209,038 3,012 Société Générale (8) 437,320 67,416 53,933 53,933 — $ 4,804,267 $ 4,289,124 $ 3,363,492 $ 2,858,714 $ 504,778 (1) Maximum facility size represents the largest amount of borrowings available under a given facility once sufficient collateral assets have been approved by the lender and pledged by us. (2) Represents the principal balance of the collateral assets. (3) Potential borrowings represents the total amount we could draw under each facility based on collateral already approved and pledged. When undrawn, these amounts are immediately available to us at our sole discretion under the terms of each revolving credit facility. (4) As of both March 31, 2016 and December 31, 2015, the Wells Fargo maximum facility size was composed of a general $1.0 billion facility size and $172.0 million of additional capacity related solely to a specific asset with a repurchase date of July 30, 2016. (5) As of March 31, 2016, the JP Morgan maximum facility size was composed of a general $500.0 million facility size, under which U.S. Dollars and British Pound Sterling borrowings are contemplated, and $262.5 million of additional capacity related solely to a specific asset with a repurchase date of January 9, 2018. As of December 31, 2015, the JP Morgan maximum facility was composed of general $250.0 million facility size plus a general £153.0 million ($226.7 million) facility size provided under a related agreement that contemplated U.S. Dollars and British Pound Sterling borrowings and, $262.5 million of additional capacity related solely to a specific asset with a repurchase date of January 9, 2018, and additional capacity of £32.3 million ($47.8 million) on the £153.0 million facility. (6) As of both March 31, 2016 and December 31, 2015, the Citibank maximum facility size was composed of a general $500.0 million facility size and $37.5 million of additional capacity related solely to a specific asset with a repurchase date of October 9, 2017. (7) The Morgan Stanley maximum facility size represents a £250.0 million facility size which was translated to $359.5 million as of March 31, 2016, and $370.4 million as of December 31, 2015. (8) The Société Générale maximum facility size represents a €400.0 million facility size which was translated to $453.5 million as of March 31, 2016, and $437.3 million as of December 31, 2015.
Summary of Key Terms of Revolving Repurchase Facilities	The following table outlines the key terms of our revolving repurchase facilities as of March 31, 2016: Lender Rate (1) Guarantee (2) Advance Rate (3) Margin Call (4) Currency Term/Maturity Wells Fargo L+1.78% 25% 79.5% Collateral marks only $ Term matched (5) Bank of America L+1.69% 50% 79.5% Collateral marks only $ May 21, 2021 (6) JP Morgan L+1.80% 25% 80.4% Collateral marks only $ / £ January 7, 2018 MetLife L+1.76% 50% 78.5% Collateral marks only $ February 24, 2021 (7) Citibank L+1.92% 25% 77.7% Collateral marks only $ Term matched (5) Morgan Stanley L+2.35% 25% 79.1% Collateral marks only £ / € March 3, 2017 Société Générale L+1.60% 25% 80.0% Collateral marks only £ / € Term matched (5) (1) Represents weighted-average cash coupon based on borrowings outstanding. In instances where our borrowings are denominated in currencies other than the U.S. Dollar, interest accrues at a rate equivalent to a margin plus a base rate other than 1-month USD LIBOR, such as 3-month GBP LIBOR, 3-month EURIBOR, or 3-month CDOR. (2) Other than amounts guaranteed based on specific collateral asset types, borrowings under our revolving repurchase facilities are non-recourse to us. (3) Represents weighted-average advance rate based on the outstanding principal balance of the collateral assets pledged. (4) Margin call provisions under our revolving repurchase facilities do not permit valuation adjustments based on capital markets events, and are limited to collateral-specific credit marks. (5) These revolving repurchase facilities have various availability periods during which new advances can be made and which are generally subject to each lender’s discretion. Maturity dates for advances outstanding are tied to the term of each respective collateral asset. (6) Includes two one-year extension options which may be exercised at our sole discretion. (7) Includes five one-year extension options which may be exercised at our sole discretion.
Summary of Statistics for Asset-Specific Financings	The following table details statistics for our asset-specific financings ($ in thousands): March 31, 2016 December 31, 2015 Financing Agreements Collateral Assets Financing Agreements Collateral Assets Number of loans 4 4 2 2 Principal balance (1) $ 157,034 $ 214,941 $ 111,746 $ 154,192 Book value $ 154,751 $ 211,292 $ 111,061 $ 153,542 Weighted-average cash coupon (2) L+2.70 % L+5.22 % L+2.52 % L+5.27 % Weighted-average cost / all-in yield (2) L+3.12 % L+5.84 % L+2.88 % L+5.83 % (1) With the exception of $13.2 million related to one asset-specific financing, we do not guarantee the obligations under these agreements. (2) These floating rate loans and related liabilities are indexed to the various benchmark rates relevant in each arrangement in terms of currency and payment frequency. Therefore the net exposure to each benchmark rate is in direct proportion to our net assets indexed to that rate. In addition to cash coupon, cost / all-in yield includes the amortization of deferred origination fees / financing costs.

Loan Participations Sold (Table

Loan Participations Sold (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Summary of Statistics for Loan Participations Sold	The following table details statistics for our loan participations sold ($ in thousands): March 31, 2016 December 31, 2015 Participations Underlying Participations Underlying Sold (1) Loans Sold (1) Loans Number of loans 3 3 3 3 Principal balance (2) $ 478,661 $ 583,589 $ 498,992 $ 608,554 Book value (2) $ 476,894 $ 579,742 $ 497,032 $ 604,321 Weighted-average cash coupon (3) L+2.38 % L+3.93 % L+2.38 % L+3.93 % Weighted-average cost / all-in yield (3) L+2.49 % L+4.16 % L+2.49 % L+4.15 % (1) During the three months ended March 31, 2016 and 2015, we recorded $3.6 million and $4.3 million, respectively, of interest expense related to our loan participations sold, of which $3.5 million and $4.0 million, respectively, was paid in cash. (2) The difference between principal balance and book value of loan participations sold is due to deferred financing costs of $1.8 million and $2.0 million as of March 31, 2016 and December 31, 2015, respectively. (3) Our floating rate loans and related liabilities were indexed to the various benchmark rates relevant in each arrangement in terms of currency and payment frequency. Therefore the net exposure to each benchmark rate is in direct proportion to our net assets indexed to that rate. In addition to cash coupon, cost / all-in yield includes the amortization of deferred origination fees / financing costs.

Derivative Financial Instrume31

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Outstanding Foreign Exchange Derivatives Designated as Net Investment Hedges of Foreign Currency Risk	The following table details our outstanding foreign exchange derivatives that were designated as net investment hedges of foreign currency risk (notional amount in thousands): March 31, 2016 December 31, 2015 Foreign Currency Derivatives Number of Notional Foreign Currency Derivatives Number of Notional Sell CAD Forward 2 C$ 154,450 Sell CAD Forward 2 C$ 154,900 Sell GBP Forward 3 £ 108,300 Sell GBP Forward 2 £ 90,400 Sell EUR Forward 1 € 48,000 Sell EUR Forward 1 € 49,000
Summary of Outstanding Interest Rate Derivatives Designated as Cash Flow Hedges of Interest Rate Risk	The following tables detail our outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (notional amount in thousands): March 31, 2016 Interest Rate Number of Notional Amount Strike Index Wtd.-Avg. Interest Rate Caps 26 $ 1,097,632 2% USD LIBOR 1.1 Interest Rate Caps 7 C$ 483,286 2% CDOR 1.0 Interest Rate Caps 1 € 152,710 2% EURIBOR 0.8 Interest Rate Caps 1 £ 15,142 2% GBP LIBOR 1.1 Interest Rate Swap 1 C$ 14,673 n/a CDOR 4.4 December 31, 2015 Interest Rate Number of Notional Amount Strike Index Wtd.-Avg. Interest Rate Caps 26 $ 1,097,632 2% USD LIBOR 1.3 Interest Rate Caps 7 C$ 483,286 2% CDOR 1.2 Interest Rate Caps 1 € 152,710 2% EURIBOR 1.0 Interest Rate Caps 1 £ 15,142 2% GBP LIBOR 1.3
Summary of Non-designated Hedges	The following table summarizes our non-designated hedges (notional amount in thousands): March 31, 2016 December 31, 2015 Number of Notional Number of Notional Non-designated Hedges Instruments Amount Non-designated Hedges Instruments Amount Interest Rate Caps 4 C$ 67,303 Interest Rate Caps 4 C$ 67,303 Interest Rate Caps 1 $ 13,387 Interest Rate Caps 1 $ 13,387 Buy GBP / Sell EUR Forward 1 € 12,857 Buy GBP / Sell EUR Forward 1 € 12,857 Buy CAD / Sell USD Forward 1 C$ 950 Buy GBP / Sell USD Forward 1 £ 10,400 Buy USD / Sell CAD Forward 1 C$ 950 Buy USD / Sell GBP Forward 1 £ 10,400 Buy CAD / Sell USD Forward 1 C$ 1,000 Buy USD / Sell CAD Forward 1 C$ 1,000
Summary of Fair Value of Derivative Financial Instruments	The following table summarizes the fair value of our derivative financial instruments ($ in thousands): Fair Value of Derivatives in an Fair Value of Derivatives in a Asset Position (1) Liability Position (2) March 31, 2016 December 31, 2015 March 31, 2016 December 31, 2015 Derivatives designated as hedging instruments: Foreign exchange contracts $ 566 $ 7,999 $ 8,981 $ 511 Interest rate derivatives 45 238 15 — Total derivatives designated as hedging instruments $ 611 $ 8,237 $ 8,996 $ 511 Derivatives not designated as hedging instruments: Foreign exchange contracts $ 14 $ 419 $ 293 $ 937 Interest rate derivatives — 1 — — Total derivatives not designated as hedging instruments $ 14 $ 420 $ 293 $ 937 Total Derivatives $ 625 $ 8,657 $ 9,289 $ 1,448 (1) Included in other assets in our consolidated balance sheets. (2) Included in accounts payable, accrued expenses, and other liabilities in our consolidated balance sheets.
Summary of Effect of Derivative Financial Instruments on Consolidated Statements of Operations	The following table presents the effect of our derivative financial instruments on our consolidated statements of operations ($ in thousands): Amount of (Loss) Amount of Gain Recognized in Loss Reclassified from OCI on Derivatives Location of Accumulated OCI into (Effective Portion) Gain (Loss) Income (Effective Portion) Three Months Ended March 31, Reclassified from Accumulated OCI into Income Three Months Ended March 31, Derivatives in Hedging Relationships 2016 2015 (Effective Portion) 2016 2015 Foreign exchange contracts (1) $ (6,470 ) $ 3,337 Interest Expense $ — $ — Interest rate derivatives (196 ) — Interest Expense (27 ) — Total $ (6,666 ) $ 3,337 $ (27 ) $ — (1) During the three months ended March 31, 2016 and 2015, we received net cash settlements of $8.2 million and $4.1 million, respectively, on our foreign currency forward contracts. Those amounts are included as a component of accumulated other comprehensive loss on our consolidated balance sheets.

Equity (Tables)

Equity (Tables)	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Schedule of Movement in Outstanding Shares of Class A Common Stock, Restricted Class A Common Stock and Deferred Stock Units	The following table details the movement in our outstanding shares of class A common stock, including restricted class A common stock and deferred stock units: Three Months Ended March 31, Common Stock Outstanding (1) 2016 2015 Beginning balance 93,843,847 58,388,808 Issuance of class A common stock 285 139 Issuance of restricted class A common stock, net 209,798 181,049 Issuance of deferred stock units 7,322 5,414 Ending balance 94,061,252 58,575,410 (1) Deferred stock units held by members of our board of directors totaled 148,843 and 124,333 as of March 31, 2016 and 2015, respectively.
Schedule of Dividend Activity	The following table details our dividend activity ($ in thousands, except per share data): Three Months Ended March 31, 2016 2015 Dividends declared per share of common stock $ 0.62 $ 0.52 Total dividends declared $ 58,226 $ 30,398
Schedule of Basic and Diluted Earnings Per Share, or EPS, Based on Weighted-Average of Both Restricted and Unrestricted Class A Common Stock Outstanding	The following table sets forth the calculation of basic and diluted net income per share of class A common stock based on the weighted-average of both restricted and unrestricted class A common stock outstanding ($ in thousands, except per share data): Three Months Ended March 31, 2016 2015 Net income (1) $ 57,047 $ 35,393 Weighted-average shares outstanding, basic and diluted 94,067,769 58,576,025 Per share amount, basic and diluted $ 0.61 $ 0.60 (1) Represents net income attributable to Blackstone Mortgage Trust, Inc.

Other Expenses (Tables)

Other Expenses (Tables)	3 Months Ended
	Mar. 31, 2016
Other Income and Expenses [Abstract]
Schedule of General and Administrative Expenses	General and administrative expenses consisted of the following ($ in thousands): Three Months Ended March 31, 2016 2015 Professional services $ 890 $ 700 Operating and other costs 869 759 Subtotal 1,759 1,459 Non-cash and CT Legacy Portfolio compensation expenses Management incentive awards plan - CTOPI (1) 170 1,777 Management incentive awards plan - CT Legacy Partners (2) 129 1,030 Restricted class A common stock earned 4,593 3,203 Director stock-based compensation 94 94 Subtotal 4,986 6,104 Total BXMT expenses 6,745 7,563 Expenses of consolidated subsidiaries 50 100 Total general and administrative expenses $ 6,795 $ 7,663 (1) Represents the portion of CTOPI promote revenue accrued under compensation awards. See Note 4 for further discussion. (2) Represents the accrual of amounts payable under the CT Legacy Partners management incentive awards during the period. See below for discussion of the CT Legacy Partners management incentive awards plan.

Stock-Based Incentive Plans (Ta

Stock-Based Incentive Plans (Tables)	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Movement in Outstanding Shares of Restricted Class A Common Stock and Weighted-Average Grant Date Fair Value Per Share	The following table details the movement in our outstanding shares of restricted class A common stock and the weighted-average grant date fair value per share: Restricted Class A Weighted-Average Grant Date Fair Balance as of December 31, 2015 1,114,908 $ 27.64 Granted 245,225 26.51 Vested (124,709 ) 27.01 Forfeited (35,427 ) 27.49 Balance as of March 31, 2016 1,199,997 $ 27.47

Fair Values (Tables)

Fair Values (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes our assets and liabilities measured at fair value on a recurring basis ($ in thousands): March 31, 2016 December 31, 2015 Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Fair Value Assets Derivatives $ — $ 625 $ — $ 625 $ — $ 8,657 $ — $ 8,657 Other assets (1) $ — $ 1,605 $ 10,221 $ 11,826 $ — $ 1,659 $ 12,561 $ 14,220 Liabilities Derivatives $ — $ 9,289 $ — $ 9,289 $ — $ 1,448 $ — $ 1,448 (1) Other assets include loans, securities, equity investments, and other receivables measured at fair value.
Reconciliation of Beginning and Ending Balances of Assets Measured at Fair Value on Recurring Basis Using Level 3 Inputs	The following table reconciles the beginning and ending balances of assets measured at fair value on a recurring basis using Level 3 inputs ($ in thousands): Three Months Ended March 31, 2016 2015 January 1, $ 12,561 $ 47,507 Proceeds from investment realizations (2,406 ) (15,038 ) Adjustments to fair value included in earnings Gain on investments at fair value 66 17,498 March 31, $ 10,221 $ 49,967
Schedule of Details of Carrying Amount, Face Amount, and Fair Value of Financial Instruments	The following table details the carrying amount, face amount, and fair value of the financial instruments described in Note 2 ($ in thousands): March 31, 2016 December 31, 2015 Carrying Face Fair Carrying Face Fair Amount Amount Value Amount Amount Value Financial assets Cash and cash equivalents $ 110,622 $ 110,622 $ 110,622 $ 96,450 $ 96,450 $ 96,450 Restricted cash 434 434 434 9,556 9,556 9,556 Loans receivable, net 9,313,763 9,346,247 9,368,855 9,077,007 9,108,361 9,121,732 Financial liabilities Secured debt agreements 6,311,659 6,329,385 6,329,385 6,116,105 6,131,751 6,131,751 Loan participations sold 476,894 478,661 478,661 497,032 498,992 498,992 Convertible notes, net 164,696 172,500 179,486 164,026 172,500 171,344

Summary of Significant Accoun36

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount attributable to consolidated VIEs	$ 0	$ 0
Income accrual, description	Income accrual is generally suspended for loans at the earlier of the date at which payments become 90 days past due or when, in the opinion of our Manager, recovery of income and principal becomes doubtful.
Cash and cash equivalents, description	Cash and cash equivalents represent cash held in banks, cash on hand, and liquid investments with original maturities of three months or less.
Expected loss	$ 0
General Electrical Capital Corporation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchase price of Loan Portfolio			$ 4,700,000,000

Loans Receivable - Additional I

Loans Receivable - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired loans	$ 0	$ 0
Maturity date	Aug. 31, 2016
Partial repayment of loan on sale of collateralized assets	$ 59,300,000
Net book value of loan after partial repayment	9,313,763,000	9,077,007,000
Risk Rating 4 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Balance of collateralized loan		$ 113,300,000
Net book value of loan after partial repayment	53,600,000
Loan Purchase Commitments [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans originated	861,300,000
Loans funded	$ 586,100,000

Loans Receivable - Overall Stat

Loans Receivable - Overall Statistics for Loans Receivable Portfolio (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)SecurityLoan	Dec. 31, 2015USD ($)SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 9,313,763	$ 9,077,007
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	126	125
Principal Balance	$ 9,346,247	$ 9,108,361
Net book value	9,313,763	9,077,007
Unfunded loan commitments	$ 965,140	$ 700,658
Weighted-average maximum maturity (years)	3 years	3 years 1 month 6 days
Loans Receivable [Member] | LIBOR [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted-average cash coupon, rate	4.82%	4.84%
Weighted-average all-in yield, rate	5.18%	5.18%
Floating Rate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	96	92
Principal Balance	$ 7,397,918	$ 7,098,180
Net book value	7,362,047	7,064,279
Unfunded loan commitments	$ 962,425	$ 696,276
Weighted-average maximum maturity (years)	3 years 2 months 12 days	3 years 3 months 18 days
Floating Rate [Member] | LIBOR [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted-average cash coupon, rate	4.08%	4.09%
Weighted-average all-in yield, rate	4.51%	4.49%
Fixed Rate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	30	33
Principal Balance	$ 1,948,329	$ 2,010,181
Net book value	1,951,716	2,012,728
Unfunded loan commitments	$ 2,715	$ 4,382
Weighted-average maximum maturity (years)	2 years 2 months 12 days	2 years 7 months 6 days
Fixed Rate [Member] | LIBOR [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted-average cash coupon, rate	5.64%	5.63%
Weighted-average all-in yield, rate	5.73%	5.78%

Loans Receivable - Overall St39

Loans Receivable - Overall Statistics for Loans Receivable Portfolio (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commitments expiration period	4 years	4 years
Floating rate loans	$ 146.9	$ 147.9
Average floor rate	1.80%	1.80%
Percentage of loans subject to yield maintenance, or other prepayment restrictions	63.00%	64.00%
Percentage of loans open to repayment by borrower without penalty	37.00%	36.00%
USD LIBOR [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of loans receivable by type	83.00%	84.00%

Loans Receivable - Activity Rel

Loans Receivable - Activity Relating to Loans Receivable Portfolio (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	$ 9,077,007
Unrealized gain on foreign currency translation	5,979	$ (20,069)
Amortization of fees and other items	8,954	$ 5,717
Ending Balance	9,313,763
Net Book Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	9,077,007
Loan originations and fundings	586,066
Loan repayments	(375,374)
Unrealized gain on foreign currency translation	27,534
Deferred fees and other items	(10,424)
Amortization of fees and other items	8,954
Ending Balance	9,313,763
Deferred Fees/Other Items [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	(31,354)
Unrealized gain on foreign currency translation	340
Deferred fees and other items	(10,424)
Amortization of fees and other items	8,954
Ending Balance	(32,484)
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance	9,108,361
Beginning Balance	9,077,007
Loan originations and fundings	586,066
Loan repayments	(375,374)
Unrealized gain on foreign currency translation	27,194
Ending Balance	9,346,247
Ending Balance	$ 9,313,763

Loans Receivable - Types of Loa

Loans Receivable - Types of Loans in Loan Portfolio, as well as Property Type and Geographic Distribution of Properties Securing these Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 9,313,763	$ 9,077,007
Percentage of Book Value	100.00%	100.00%
Senior Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 9,076,146	$ 8,847,044
Percentage of Book Value	97.00%	97.00%
Subordinate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 237,617	$ 229,963
Percentage of Book Value	3.00%	3.00%
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 9,313,763	$ 9,077,007
Percentage of Book Value	100.00%	100.00%
Office [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 4,164,413	$ 4,039,521
Percentage of Book Value	45.00%	45.00%
Hotel [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 1,871,777	$ 1,903,544
Percentage of Book Value	20.00%	21.00%
Multifamily [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 551,701	$ 580,112
Percentage of Book Value	6.00%	6.00%
Condominium [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 205,800	$ 127,434
Percentage of Book Value	2.00%	1.00%
Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 802,471	$ 684,944
Percentage of Book Value	9.00%	8.00%
Manufactured Housing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 1,349,509	$ 1,361,572
Percentage of Book Value	14.00%	15.00%
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 368,092	$ 379,880
Percentage of Book Value	4.00%	4.00%
United States Northeast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 2,190,170	$ 2,260,392
Percentage of Book Value	23.00%	25.00%
United States Southeast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 1,802,381	$ 1,836,766
Percentage of Book Value	18.00%	20.00%
United States West [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 1,354,256	$ 1,125,238
Percentage of Book Value	15.00%	12.00%
United States Southwest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 953,204	$ 1,035,839
Percentage of Book Value	10.00%	11.00%
United States Midwest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 703,285	$ 616,964
Percentage of Book Value	8.00%	7.00%
United States Northwest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 350,545	$ 390,307
Percentage of Book Value	4.00%	4.00%
United States [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 7,353,841	$ 7,265,506
Percentage of Book Value	78.00%	79.00%
United Kingdom [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 982,404	$ 888,998
Percentage of Book Value	11.00%	10.00%
Canada [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 604,343	$ 561,023
Percentage of Book Value	6.00%	6.00%
Spain [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 69,180	$ 66,661
Percentage of Book Value	1.00%	1.00%
Netherlands [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 61,795	$ 59,525
Percentage of Book Value	1.00%	1.00%
Germany [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 242,200	$ 235,294
Percentage of Book Value	3.00%	3.00%
International [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 1,959,922	$ 1,811,501
Percentage of Book Value	22.00%	21.00%

Loans Receivable - Principal Ba

Loans Receivable - Principal Balance and Net Book Value of Loans Receivable Based on Internal Risk Ratings (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)SecurityLoan	Dec. 31, 2015USD ($)SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 9,313,763	$ 9,077,007
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	126	125
Principal Balance	$ 9,346,247	$ 9,108,361
Net book value	$ 9,313,763	$ 9,077,007
Risk Rating 1 [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	13	12
Principal Balance	$ 915,990	$ 925,443
Net book value	$ 911,350	$ 919,991
Risk Rating 2 [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	72	77
Principal Balance	$ 5,743,148	$ 5,948,922
Net book value	$ 5,729,541	$ 5,929,447
Risk Rating 3 [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	40	35
Principal Balance	$ 2,633,081	$ 2,120,713
Net book value	2,619,223	2,114,531
Risk Rating 4 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Balance		$ 113,300
Net book value	$ 53,600
Risk Rating 4 [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	1	1
Principal Balance	$ 54,028	$ 113,283
Net book value	$ 53,649	$ 113,038

Equity Investments in Unconso43

Equity Investments in Unconsolidated Subsidiaries - Activity Relating to Our Equity Investments in Unconsolidated Subsidiaries (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Schedule of Equity Method Investments [Line Items]
Beginning Balance	$ 9,441
Distributions	(6,837)
Ending Balance	2,762
CT Opportunity Partners I, LP [Member]
Schedule of Equity Method Investments [Line Items]
Beginning Balance	9,441
Distributions	(6,837)
Income allocation	158
Ending Balance	$ 2,762

Equity Investments in Unconso44

Equity Investments in Unconsolidated Subsidiaries - Additional Information (Detail) - CT Opportunity Partners I, LP [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jan. 31, 2011
Schedule of Equity Method Investments [Line Items]
Carried interest revenue, percentage of fund's profit	17.70%
Preferred return	9.00%
Return of capital to partners	100.00%
Carried interest revenue	$ 2,800
Promote income recognized	$ 138,000	$ 3,900
Percentage of carried interest distributions pool for employees			45.00%
Percentage of pool vested	68.00%
Fully vested pool, percentage	32.00%
Description of incentive management fee grants to employees vesting schedule	Approximately 68% of the pool is two-thirds vested as of March 31, 2016, with the remainder contingent on continued employment with an affiliate of our Manager and upon our receipt of promote distributions from CTOPI. The remaining 32% of the pool is fully vested as a result of an acceleration event. During the three months ended March 31, 2016 and 2015, we recognized $170,000 and $1.8 million, respectively, under the CTOPI incentive plan, which amounts were recognized as a component of general and administrative expenses in our consolidated statement of operations.
CTOPI Incentive Plan [Member]
Schedule of Equity Method Investments [Line Items]
Recognized expenses for incentive plan	$ 170,000	$ 1,800

Other Assets - Summary of Compo

Other Assets - Summary of Components of Other Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Principal and interest payments held by servicer	$ 77,145	$ 123,160
Accrued interest receivable	36,901	37,161
Real estate debt and equity investments, at fair value	11,826	14,220
Prepaid expenses	828	890
Prepaid taxes	485	525
Other		8,163
Total	$ 127,185	$ 184,119

Secured Debt Agreements - Sched

Secured Debt Agreements - Schedule of Secured Debt Agreements (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding	$ 6,329,385	$ 6,131,751
Deferred financing costs	(17,726)	(15,646)
Net book value of secured debt	6,311,659	6,116,105
Revolving Repurchase Facilities [Member]
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding	3,252,405	2,858,714
GE Portfolio Acquisition Facility [Member]
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding	2,919,946	3,161,291
Asset-Specific Financings [Member]
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding	$ 157,034	$ 111,746

Secured Debt Agreements - Revol

Secured Debt Agreements - Revolving Repurchase Facilities (Detail) - Revolving Repurchase Facilities [Member]	Mar. 31, 2016USD ($)	Mar. 31, 2016GBP (£)	Mar. 31, 2016EUR (€)	Dec. 31, 2015USD ($)
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 4,730,915,000			$ 4,804,267,000
Collateral Assets	4,745,082,000			4,289,124,000
Potential	3,716,729,000			3,363,492,000
Repurchase Borrowings Outstanding	3,252,405,000			2,858,714,000
Available	464,324,000			504,778,000
JP Morgan [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	762,500,000			787,047,000
Collateral Assets	796,344,000			864,630,000
Potential	638,390,000			689,705,000
Repurchase Borrowings Outstanding	564,605,000			596,533,000
Available	73,785,000			93,172,000
Citibank [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	537,500,000			537,500,000
Collateral Assets	590,281,000			604,781,000
Potential	455,716,000			461,532,000
Repurchase Borrowings Outstanding	377,251,000			370,194,000
Available	78,465,000			91,338,000
Wells Fargo [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	1,172,000,000			1,172,000,000
Collateral Assets	1,286,632,000			1,044,860,000
Potential	1,005,043,000			817,562,000
Repurchase Borrowings Outstanding	871,485,000			685,485,000
Available	133,558,000			132,077,000
Bank of America [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	750,000,000			750,000,000
Collateral Assets	847,304,000			840,884,000
Potential	666,275,000			665,861,000
Repurchase Borrowings Outstanding	618,944,000			618,944,000
Available	47,331,000			46,917,000
MetLife [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	695,945,000			750,000,000
Collateral Assets	767,290,000			593,273,000
Potential	594,369,000			462,849,000
Repurchase Borrowings Outstanding	466,107,000			324,587,000
Available	128,262,000			138,262,000
Morgan Stanley [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	359,450,000	£ 250,000,000		370,400,000
Collateral Assets	387,317,000			273,280,000
Potential	301,005,000			212,050,000
Repurchase Borrowings Outstanding	298,082,000			209,038,000
Available	2,923,000			3,012,000
Societe Generale [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	453,520,000		€ 400,000,000	437,320,000
Collateral Assets	69,914,000			67,416,000
Potential	55,931,000			53,933,000
Repurchase Borrowings Outstanding	$ 55,931,000			$ 53,933,000

Secured Debt Agreements - Rev48

Secured Debt Agreements - Revolving Repurchase Facilities (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2016USD ($)	Mar. 31, 2016GBP (£)	Mar. 31, 2016EUR (€)	Dec. 31, 2015USD ($)	Dec. 31, 2015GBP (£)
Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 4,730,915,000			$ 4,804,267,000
JP Morgan [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	762,500,000			787,047,000
JP Morgan [Member] | Asset Specific Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 262,500,000			262,500,000
Facility repurchase date	Jan. 9, 2018
JP Morgan [Member] | Pledged Assets Repayment Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size				47,800,000	£ 32,300,000
Citibank [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 537,500,000			537,500,000
Citibank [Member] | Asset Specific Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 37,500,000			37,500,000
Facility repurchase date	Oct. 9, 2017
Wells Fargo [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 1,172,000,000			1,172,000,000
Wells Fargo [Member] | Asset Specific Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 172,000,000			172,000,000
Facility repurchase date	Jul. 30, 2016
Morgan Stanley [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 359,450,000	£ 250,000,000		370,400,000
Societe Generale [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	453,520,000		€ 400,000,000	437,320,000
$250.0 Million Facility [Member] | JP Morgan [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	500,000,000			250,000,000
UK Pound Sterling 153.0 Million ($226.7 Million) Facility [Member] | JP Morgan [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size				226,700,000	£ 153,000,000
$500.0 Million Facility [Member] | Citibank [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	500,000,000			500,000,000
$1.0 Billion Facility [Member] | Wells Fargo [Member] | Revolving Repurchase Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 1,000,000,000			$ 1,000,000,000

Secured Debt Agreements - Addit

Secured Debt Agreements - Additional Information (Detail)	Apr. 22, 2016USD ($)ExtensionOptions	Apr. 04, 2016USD ($)ExtensionOptions	Mar. 31, 2016USD ($)ExtensionOptions	Mar. 31, 2016USD ($)ExtensionOptionsAssets	Dec. 31, 2015USD ($)	Jun. 30, 2015USD ($)ExtensionOptions	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Maturity date				Aug. 31, 2016
Secured debt agreements borrowings outstanding			$ 6,311,659,000	$ 6,311,659,000	$ 6,116,105,000		$ 6,116,105,000
Covenants, minimum tangible net worth			$ 1,900,000,000	$ 1,900,000,000
Covenants, percentage of tangible assets on cash proceeds from equity issuances				75.00%
Covenants, percentage of recourse indebtedness			5.00%	5.00%
Minimum [Member]
Debt Instrument [Line Items]
Covenants, EBITDA to fixed charges, in percent				140.00%
Covenants, minimum cash liquidity amount			$ 10,000,000	$ 10,000,000
Maximum [Member]
Debt Instrument [Line Items]
Covenants, indebtedness to total assets, in percent			83.33%	83.33%
Asset-Specific Financings [Member]
Debt Instrument [Line Items]
Weighted-average outstanding balance				$ 141,400,000	224,800,000
Closing of asset specific financings | Assets				2
Additional credit capacity				$ 232,400,000
Revolving Repurchase Facilities [Member]
Debt Instrument [Line Items]
Weighted-average outstanding balance				3,100,000,000	2,800,000,000
Aggregate borrowings			$ 3,300,000,000	$ 3,300,000,000	2,900,000,000		$ 2,900,000,000
Weighted-average advance rate				79.20%			79.10%
Weighted-average initial maturity				1 year 3 months 18 days			1 year 4 months 24 days
Approximate credit line amount			4,730,915,000	$ 4,730,915,000	4,804,267,000		$ 4,804,267,000
Amount available for potential future fundings of loan			464,324,000	464,324,000	504,778,000		504,778,000
Current borrowing capacity			3,716,729,000	$ 3,716,729,000	3,363,492,000		3,363,492,000
Revolving Repurchase Facilities [Member] | Wells Fargo [Member]
Debt Instrument [Line Items]
Weighted-average advance rate				79.50%
Approximate credit line amount			1,172,000,000	$ 1,172,000,000	1,172,000,000		1,172,000,000
Amount available for potential future fundings of loan			133,558,000	$ 133,558,000	132,077,000		132,077,000
Borrowings maturity term				Term matched
Current borrowing capacity			1,005,043,000	$ 1,005,043,000	817,562,000		817,562,000
Revolving Repurchase Facilities [Member] | Bank of America [Member]
Debt Instrument [Line Items]
Weighted-average advance rate				79.50%
Approximate credit line amount			$ 750,000,000	$ 750,000,000	750,000,000		750,000,000
Number of extension options | ExtensionOptions			2	2
Term of maturity date				1 year
Amount available for potential future fundings of loan			$ 47,331,000	$ 47,331,000	46,917,000		46,917,000
Borrowings maturity term				May 21, 2021
Current borrowing capacity			666,275,000	$ 666,275,000	665,861,000		665,861,000
Maturity period				Includes two one-year extension options which may be exercised at our sole discretion.
Revolving Repurchase Facilities [Member] | MetLife [Member]
Debt Instrument [Line Items]
Weighted-average advance rate				78.50%
Approximate credit line amount			$ 695,945,000	$ 695,945,000	750,000,000		750,000,000
Number of extension options | ExtensionOptions			5	5
Term of maturity date				1 year
Amount available for potential future fundings of loan			$ 128,262,000	$ 128,262,000	138,262,000		138,262,000
Borrowings maturity term				February 24, 2021
Current borrowing capacity			594,369,000	$ 594,369,000	462,849,000		462,849,000
Maturity period				Includes five one-year extension options which may be exercised at our sole discretion.
Revolving Repurchase Facilities [Member] | MetLife [Member] | Subsequent Events [Member]
Debt Instrument [Line Items]
Approximate credit line amount	$ 1,000,000,000
Maturity date	Apr. 22, 2022
Number of extension options | ExtensionOptions	5
Term of maturity date	1 year
Additional credit capacity	$ 304,100,000
Maturity period	Inclusive of five one-year extension options, exercisable at our option
Revolving Repurchase Facilities [Member] | Extended Maturity [Member] | Bank of America [Member]
Debt Instrument [Line Items]
Approximate credit line amount			$ 750,000,000	$ 750,000,000
Maturity date				May 21, 2021
Number of extension options | ExtensionOptions			2	2
Term of maturity date				1 year
GE Portfolio Acquisition Facility [Member] | Sequential Repay Advance [Member]
Debt Instrument [Line Items]
Term of maturity date						1 year
Secured debt agreements borrowings outstanding					40,700,000		40,700,000
Current borrowing capacity						$ 237,200,000
Percentage of additional advance						5.00%
Sequential Repay Advance, percentage of guarantee rate						100.00%
GE Portfolio Acquisition Facility [Member] | Wells Fargo [Member]
Debt Instrument [Line Items]
Approximate credit line amount			$ 3,100,000,000	$ 3,100,000,000
Approximate credit line, outstanding amount			2,900,000,000
Amount available for potential future fundings of loan			133,900,000	$ 133,900,000
GE Portfolio Acquisition Facility [Member] | Asset Specific Borrowings [Member]
Debt Instrument [Line Items]
Maturity date				May 20, 2020
Number of extension options | ExtensionOptions						2
Term of maturity date						1 year
Weighted average rate						80.00%
Borrowings maturity term				The asset-specific borrowings are term matched to the underlying collateral assets with an outside maturity date of May 20, 2020, which may be extended pursuant to two one-year extension options.
Secured debt agreements borrowings outstanding			$ 2,900,000,000	$ 2,900,000,000	$ 3,100,000,000		$ 3,100,000,000
GE Portfolio Acquisition Facility [Member] | Asset Specific Borrowings [Member] | Maximum [Member]
Debt Instrument [Line Items]
Percentage of guarantee rate						25.00%
Guarantee of outstanding borrowings						$ 250,000,000
Full Recourse Revolving Credit Facility [Member] | Barclays [Member] | Subsequent Events [Member]
Debt Instrument [Line Items]
Approximate credit line amount		$ 125,000,000
Maturity date		Apr. 4, 2018
Number of extension options | ExtensionOptions		2
Term of maturity date		1 year
Accrue interest rate, description		Accrue interest at a per annum pricing rate equal to the sum of (i) an applicable base rate or Eurodollar rate and (ii) an applicable margin, in each case, dependent on the applicable type of loan.
Maturity period		Subject to two one-year extension options, exercisable at our option.
LIBOR [Member] | Revolving Repurchase Facilities [Member] | Wells Fargo [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent				1.78%
LIBOR [Member] | Revolving Repurchase Facilities [Member] | Bank of America [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent				1.69%
LIBOR [Member] | Revolving Repurchase Facilities [Member] | MetLife [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent				1.76%
LIBOR [Member] | Revolving Repurchase Facilities [Member] | Weighted-Average Cash Coupon [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent				1.83%			1.82%
LIBOR [Member] | Revolving Repurchase Facilities [Member] | Weighted-Average All-in Cost of Credit [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent				2.03%			2.04%
LIBOR [Member] | GE Portfolio Acquisition Facility [Member] | Sequential Repay Advance [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent						3.10%
LIBOR basis spread on debt obligation				30-day LIBOR
Base Rate [Member] | GE Portfolio Acquisition Facility [Member] | Asset Specific Borrowings [Member] | Primary [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent						1.75%
Base Rate [Member] | GE Portfolio Acquisition Facility [Member] | Asset Specific Borrowings [Member] | Primary [Member] | Year Four [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent						1.80%
Base Rate [Member] | GE Portfolio Acquisition Facility [Member] | Asset Specific Borrowings [Member] | Primary [Member] | Year Five [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent						1.85%

Secured Debt Agreements - Summa

Secured Debt Agreements - Summary of Key Terms of Revolving Repurchase Facilities (Detail) - Revolving Repurchase Facilities [Member]	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Advance Rate	79.20%	79.10%
Wells Fargo [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Advance Rate	79.50%
Margin Call	Collateral marks only
Term/Maturity	Term matched
Wells Fargo [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Rate	1.78%
Bank of America [Member]
Line of Credit Facility [Line Items]
Guarantee	50.00%
Advance Rate	79.50%
Margin Call	Collateral marks only
Term/Maturity	May 21, 2021
Bank of America [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Rate	1.69%
JP Morgan [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Advance Rate	80.40%
Margin Call	Collateral marks only
Term/Maturity	January 7, 2018
JP Morgan [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Rate	1.80%
MetLife [Member]
Line of Credit Facility [Line Items]
Guarantee	50.00%
Advance Rate	78.50%
Margin Call	Collateral marks only
Term/Maturity	February 24, 2021
MetLife [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Rate	1.76%
Citibank [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Advance Rate	77.70%
Margin Call	Collateral marks only
Term/Maturity	Term matched
Citibank [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Rate	1.92%
Morgan Stanley [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Advance Rate	79.10%
Margin Call	Collateral marks only
Term/Maturity	March 3, 2017
Morgan Stanley [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Rate	2.35%
Societe Generale [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Advance Rate	80.00%
Margin Call	Collateral marks only
Term/Maturity	Term matched
Societe Generale [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Rate	1.60%

Secured Debt Agreements - Sum51

Secured Debt Agreements - Summary of Key Terms of Revolving Repurchase Facilities (Parenthetical) (Detail) - Revolving Repurchase Facilities [Member]	3 Months Ended
	Mar. 31, 2016ExtensionOptions
Bank of America [Member]
Line of Credit Facility [Line Items]
Maturity period	Includes two one-year extension options which may be exercised at our sole discretion.
Number of extension options	2
Term of maturity date	1 year
MetLife [Member]
Line of Credit Facility [Line Items]
Maturity period	Includes five one-year extension options which may be exercised at our sole discretion.
Number of extension options	5
Term of maturity date	1 year
Societe Generale [Member]
Line of Credit Facility [Line Items]
Maturity period	Includes a one-year extension option which, subject to certain provisions, may be exercised at our discretion.
Number of extension options	1
Term of maturity date	1 year

Secured Debt Agreements - Sum52

Secured Debt Agreements - Summary of Statistics for Asset-Specific Financings (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)Loans	Dec. 31, 2015USD ($)Loans
Collateral Assets [Member]
Participating Mortgage Loans [Line Items]
Number of loans | Loans	4	2
Principal balance	$ 214,941	$ 154,192
Book value	$ 211,292	$ 153,542
Collateral Assets [Member] | Weighted-Average Cash Coupon [Member] | LIBOR [Member]
Participating Mortgage Loans [Line Items]
Weighted-average cash coupon, Basis spread on variable rate	5.22%	5.27%
Collateral Assets [Member] | Weighted-Average All-in Cost of Credit [Member] | LIBOR [Member]
Participating Mortgage Loans [Line Items]
Weighted-average cost / all-in yield, rate	5.84%	5.83%
Asset-Specific Financings [Member]
Participating Mortgage Loans [Line Items]
Number of loans | Loans	4	2
Principal balance	$ 157,034	$ 111,746
Book value	$ 154,751	$ 111,061
Asset-Specific Financings [Member] | Weighted-Average Cash Coupon [Member] | LIBOR [Member]
Participating Mortgage Loans [Line Items]
Weighted-average cash coupon, Basis spread on variable rate	2.70%	2.52%
Asset-Specific Financings [Member] | Weighted-Average All-in Cost of Credit [Member] | LIBOR [Member]
Participating Mortgage Loans [Line Items]
Weighted-average cost / all-in yield, rate	3.12%	2.88%

Secured Debt Agreements - Sum53

Secured Debt Agreements - Summary of Statistics for Asset-Specific Financings (Parenthetical) (Detail) $ in Millions	Mar. 31, 2016USD ($)
Asset-Specific Financings [Member]
Participating Mortgage Loans [Line Items]
Guarantee obligation of principal balance	$ 13.2

Loan Participations Sold - Addi

Loan Participations Sold - Additional Information (Detail) - Mar. 31, 2016 £ in Millions, $ in Millions	USD ($)	GBP (£)
Debt Disclosure [Abstract]
Guarantor obligations	$ 34.5	£ 24

Loan Participations Sold - Summ

Loan Participations Sold - Summary of Statistics for Loan Participations Sold (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)Loans	Dec. 31, 2015USD ($)Loans
Participating Mortgage Loans [Line Items]
Participations Sold, Number of loans | Loans	3	3
Principal balance, Participations Sold	$ 478,661	$ 498,992
Book value, Participations Sold	$ 476,894	$ 497,032
Underlying Loans, Number of loans | Loans	3	3
Principal balance, Underlying Loans	$ 583,589	$ 608,554
Book value, Underlying Loans	$ 579,742	$ 604,321
LIBOR [Member]
Participating Mortgage Loans [Line Items]
Weighted-average cash coupon, Participations Sold, rate	2.38%	2.38%
Weighted-average all-in cost / yield, Participations Sold	2.49%	2.49%
Weighted-average cash coupon, Underlying Loans, rate	3.93%	3.93%
Weighted-average all-in cost / yield, Underlying Loans	4.16%	4.15%

Loan Participations Sold - Su56

Loan Participations Sold - Summary of Statistics for Loan Participations Sold (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Participating Mortgage Loans [Line Items]
Interest paid	$ 38,121	$ 18,996
Deferred financing costs	17,726		$ 15,646
Loan Participations Sold [Member]
Participating Mortgage Loans [Line Items]
Interest expense	3,600	4,300
Interest paid	3,500	$ 4,000
Deferred financing costs	$ 1,800		$ 2,000

Convertible Notes, Net - Additi

Convertible Notes, Net - Additional Information (Detail)	1 Months Ended	3 Months Ended
	Nov. 30, 2013USD ($)$ / shares	Mar. 31, 2016USD ($)$ / shares	Dec. 31, 2015USD ($)$ / shares	Mar. 31, 2015USD ($)
Debt Instrument [Line Items]
Maturity date		Aug. 31, 2016
Convertible notes, net		$ 164,696,000	$ 164,026,000
5.25% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible Senior Notes, Principal amount	$ 172,500,000
Convertible Senior Notes, Interest rate	5.25%
Maturity date		Dec. 1, 2018
Convertible Senior Notes, Interest rate including underwriter discounts	5.87%
Description of Convertible Notes conversion		The Convertible Notes are convertible at the holders' option into shares of our class A common stock, only under specific circumstances, prior to the close of business on August 31, 2018, at the applicable conversion rate in effect on the conversion date.
Discount upon issuance of Convertible Notes	$ 9,100,000	$ 7,500,000	8,200,000
Debt issuance costs	$ 4,100,000
Convertible Notes, assumed effective interest rate	6.50%
Convertible Senior Notes, Interest rate including amortization of discount upon issuance	7.16%
Total interest on convertible notes		3,000,000		$ 2,900,000
Interest on convertible notes related to cash coupon		2,300,000		2,300,000
Interest on convertible notes related to amortization of discount and certain issuance costs		670,000		$ 630,000
Accrued interest payable		3,000,000	755,000
Deferred financing costs		281,000	$ 305,000
5.25% Convertible Senior Notes [Member] | Class A Common Stock [Member]
Debt Instrument [Line Items]
Convertible Notes, debt conversion, common stock issued, in percent	34.8943		35.2653
Convertible Notes, debt conversion, principal amount	$ 1,000	$ 0	$ 1,000
Debt instrument, conversion price | $ / shares	$ 28.66	$ 26.86	$ 28.36

Derivative Financial Instrume58

Derivative Financial Instruments - Summary of Outstanding Foreign Exchange Derivatives Designated as Net Investment Hedges of Foreign Currency Risk (Detail) - Sell [Member] - Designated as Hedging Instrument [Member] - Foreign Exchange Forward [Member] - Net Investment Hedges [Member] € in Thousands, £ in Thousands, CAD in Thousands	Mar. 31, 2016GBP (£)DerivativeInstrument	Mar. 31, 2016EUR (€)DerivativeInstrument	Mar. 31, 2016CADDerivativeInstrument	Dec. 31, 2015GBP (£)DerivativeInstrument	Dec. 31, 2015EUR (€)DerivativeInstrument	Dec. 31, 2015CADDerivativeInstrument
EUR [Member]
Derivative [Line Items]
Number of Instruments	1	1	1	1	1	1
Notional Amount | €		€ 48,000			€ 49,000
GBP [Member]
Derivative [Line Items]
Number of Instruments	3	3	3	2	2	2
Notional Amount | £	£ 108,300			£ 90,400
CAD [Member]
Derivative [Line Items]
Number of Instruments	2	2	2	2	2	2
Notional Amount | CAD			CAD 154,450			CAD 154,900

Derivative Financial Instrume59

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net asset position of derivative counterparties	$ 135,000
Net liability position of derivative counterparties	8,800,000
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives recorded losses during the period	976,000	$ 0
Interest Rate Caps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash flow hedge ineffectiveness	0	$ 0
Reclassification from other accumulated comprehensive income as increase to interest expense	$ 1,300,000

Derivative Financial Instrume60

Derivative Financial Instruments - Summary of Outstanding Interest Rate Derivatives Designated as Cash Flow Hedges of Interest Rate Risk (Detail) - Cash Flow Hedges [Member] - Designated as Hedging Instrument [Member] € in Thousands, £ in Thousands, CAD in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)DerivativeInstrument	Dec. 31, 2015USD ($)DerivativeInstrument	Mar. 31, 2016GBP (£)DerivativeInstrument	Mar. 31, 2016EUR (€)DerivativeInstrument	Mar. 31, 2016CADDerivativeInstrument	Dec. 31, 2015GBP (£)DerivativeInstrument	Dec. 31, 2015EUR (€)DerivativeInstrument	Dec. 31, 2015CADDerivativeInstrument
Interest Rate Caps [Member] | USD [Member] | USD LIBOR [Member]
Derivative [Line Items]
Number of Instruments	26	26	26	26	26	26	26	26
Notional Amount | $	$ 1,097,632	$ 1,097,632
Strike	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%
Wtd. Avg. Maturity (Years)	1 year 1 month 6 days	1 year 3 months 18 days
Interest Rate Caps [Member] | CAD [Member] | CDOR [Member]
Derivative [Line Items]
Number of Instruments	7	7	7	7	7	7	7	7
Notional Amount | CAD					CAD 483,286			CAD 483,286
Strike	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%
Wtd. Avg. Maturity (Years)	1 year	1 year 2 months 12 days
Interest Rate Caps [Member] | EUR [Member] | EURIBOR [Member]
Derivative [Line Items]
Number of Instruments	1	1	1	1	1	1	1	1
Notional Amount | €				€ 152,710			€ 152,710
Strike	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%
Wtd. Avg. Maturity (Years)	9 months 18 days	1 year
Interest Rate Caps [Member] | GBP [Member] | GBP LIBOR [Member]
Derivative [Line Items]
Number of Instruments	1	1	1	1	1	1	1	1
Notional Amount | £			£ 15,142			£ 15,142
Strike	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%
Wtd. Avg. Maturity (Years)	1 year 1 month 6 days	1 year 3 months 18 days
Interest Rate Swaps [Member] | CAD [Member] | CDOR [Member]
Derivative [Line Items]
Number of Instruments	1		1	1	1
Notional Amount | CAD					CAD 14,673
Wtd. Avg. Maturity (Years)	4 years 4 months 24 days

Derivative Financial Instrume61

Derivative Financial Instruments - Summary of Non-designated Hedges (Detail) - Not Designated as Hedging Instrument [Member] € in Thousands, £ in Thousands, CAD in Thousands, $ in Thousands	Mar. 31, 2016USD ($)DerivativeInstrument	Mar. 31, 2016EUR (€)DerivativeInstrument	Mar. 31, 2016CADDerivativeInstrument	Dec. 31, 2015USD ($)DerivativeInstrument	Dec. 31, 2015GBP (£)DerivativeInstrument	Dec. 31, 2015EUR (€)DerivativeInstrument	Dec. 31, 2015CADDerivativeInstrument
Foreign Exchange Forward [Member] | CAD [Member] | Buy CAD / Sell USD Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of Instruments	1	1	1	1	1	1	1
Notional Amount | CAD			CAD 950				CAD 1,000
Foreign Exchange Forward [Member] | CAD [Member] | Buy USD / Sell CAD Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of Instruments	1	1	1	1	1	1	1
Notional Amount | CAD			CAD 950				CAD 1,000
Foreign Exchange Forward [Member] | GBP [Member] | Buy GBP / Sell USD Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of Instruments				1	1	1	1
Notional Amount | £					£ 10,400
Foreign Exchange Forward [Member] | GBP [Member] | Buy USD / Sell GBP Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of Instruments				1	1	1	1
Notional Amount | £					£ 10,400
Foreign Exchange Forward [Member] | EUR [Member] | Buy GBP / Sell EUR Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of Instruments	1	1	1	1	1	1	1
Notional Amount | €		€ 12,857				€ 12,857
Interest Rate Caps [Member] | CAD [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of Instruments	4	4	4	4	4	4	4
Notional Amount | CAD			CAD 67,303				CAD 67,303
Interest Rate Caps [Member] | USD [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of Instruments	1	1	1	1	1	1	1
Notional Amount | $	$ 13,387			$ 13,387

Derivative Financial Instrume62

Derivative Financial Instruments - Summary of Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	$ 625	$ 8,657
Fair Value of Derivatives in a Liability Position	9,289	1,448
Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	611	8,237
Fair Value of Derivatives in a Liability Position	8,996	511
Designated as Hedging Instrument [Member] | Foreign Currency Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	566	7,999
Fair Value of Derivatives in a Liability Position	8,981	511
Designated as Hedging Instrument [Member] | Interest Rate Derivatives [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	45	238
Fair Value of Derivatives in a Liability Position	15
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	14	420
Fair Value of Derivatives in a Liability Position	293	937
Not Designated as Hedging Instrument [Member] | Foreign Currency Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	14	419
Fair Value of Derivatives in a Liability Position	$ 293	937
Not Designated as Hedging Instrument [Member] | Interest Rate Derivatives [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position		$ 1

Derivative Financial Instrume63

Derivative Financial Instruments - Summary of Effect of Derivative Financial Instruments on Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of (Loss) Gain Recognized in OCI on Derivatives (Effective Portion)	$ (6,666)	$ 3,337
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	(27)
Foreign Currency Contracts [Member] | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of (Loss) Gain Recognized in OCI on Derivatives (Effective Portion)	(6,470)	$ 3,337
Interest Rate Derivatives [Member] | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of (Loss) Gain Recognized in OCI on Derivatives (Effective Portion)	(196)
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	$ (27)

Derivative Financial Instrume64

Derivative Financial Instruments - Summary of Effect of Derivative Financial Instruments on Consolidated Statements of Operations (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Investment Hedges [Member] | Foreign Currency Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net cash settlements on our foreign currency forward contracts	$ 8.2	$ 4.1

Equity - Additional Information

Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Apr. 15, 2016	Mar. 15, 2016	May. 09, 2014	May. 31, 2013	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Mar. 25, 2014
Class of Stock [Line Items]
Total stock, shares authorized					300,000,000
Preferred stock, shares authorized					100,000,000
Preferred stock issued					0
Preferred stock outstanding					0
Plan adoption date					Mar. 25, 2014
Dividends declared per share of common stock		$ 0.62			$ 0.62	$ 0.52
Date of dividend paid					Apr. 15, 2016
Date of dividend declared					Mar. 15, 2016
Record date of dividend paid					Mar. 31, 2016
Accumulated other comprehensive loss					$ 33,445		$ 32,758
Gain related to changes in fair value of derivative instruments					18,400		25,000
Cumulative currency translation adjustment on assets and liabilities denominated in foreign currencies					51,800		57,800
CT Legacy Partners' total equity					11,000		22,500
Equity interests owned by Blackstone Mortgage Trust, Inc.					4,600		9,400
Non-controlling interests in CT Legacy Partners					$ 6,400		$ 13,100
Subsequent Events [Member]
Class of Stock [Line Items]
Dividends paid	$ 58,200
Dividends paid per common stock	$ 0.62
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares authorized					200,000,000		200,000,000
Common stock, shares issued under dividend reinvestment component					285	139
Number of shares sold during period				25,875,000	285	139
Class A Common Stock [Member] | ATM Agreements [Member]
Class of Stock [Line Items]
Aggregate sales price			$ 200,000
Number of shares sold during period					0	0
Aggregate sales price remaining available					$ 188,600
Dividend Reinvestment and Direct Stock Purchase Plan [Member] | Class A Common Stock [Member]
Class of Stock [Line Items]
Reserved for issuance of class A common stock					9,999,112			10,000,000

Equity - Schedule of Movement i

Equity - Schedule of Movement in Outstanding Shares of Class A Common Stock, Restricted Class A Common Stock and Deferred Stock Units (Detail) - Class A Common Stock [Member] - shares	1 Months Ended	3 Months Ended
	May. 31, 2013	Mar. 31, 2016	Mar. 31, 2015
Class of Stock [Line Items]
Beginning balance		93,843,847	58,388,808
Issuance of class A common stock	25,875,000	285	139
Issuance of restricted class A common stock, net		209,798	181,049
Issuance of deferred stock units		7,322	5,414
Ending balance		94,061,252	58,575,410

Equity - Schedule of Movement67

Equity - Schedule of Movement in Outstanding Shares of Class A Common Stock, Restricted Class A Common Stock and Deferred Stock Units (Parenthetical) (Detail) - shares	Mar. 31, 2016	Mar. 31, 2015
Class A Common Stock [Member]
Class of Stock [Line Items]
Deferred stock units held by directors	148,843	124,333

Equity - Schedule of Dividend A

Equity - Schedule of Dividend Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	Mar. 15, 2016	Mar. 31, 2016	Mar. 31, 2015
Equity [Abstract]
Dividends declared per share of common stock	$ 0.62	$ 0.62	$ 0.52
Total dividends declared		$ 58,226	$ 30,398

Equity - Schedule of Basic and

Equity - Schedule of Basic and Diluted Earnings Per Share, or EPS, Based on Weighted-Average of Both Restricted and Unrestricted Class A Common Stock Outstanding (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income	$ 57,047	$ 35,393
Weighted-average shares outstanding, basic and diluted	94,067,769	58,576,025
Per share amount, basic and diluted	$ 0.61	$ 0.60

Other Expenses - Additional Inf

Other Expenses - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Management fee - percent of outstanding equity balance	1.50%
Incentive fee computation-percent of the product per agreement	20.00%
Incentive fee computation-percent of outstanding Equity per annum	7.00%
Management fees description	Manager is entitled to an incentive fee in an amount equal to the product of (i) 20% and (ii) the excess of (a) our Core Earnings (as defined in our management agreement) for the previous 12-month period over (b) an amount equal to 7.00% per annum multiplied by our outstanding Equity, provided that our Core Earnings over the prior three-year period (or the period since the date of the first offering of our class A common stock following December 19, 2012, whichever is shorter) is greater than zero. Core Earnings, as defined in our management agreement, is generally equal to our net income (loss) prepared in accordance with GAAP, excluding (i) certain non-cash items (ii) the net income (loss) related to our legacy portfolio and (iii) incentive management fees.
Management fees	$ 13,613,000	$ 6,671,000
Manager [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Management fees	9,500,000	5,500,000
Incentive fees payable	4,200,000	$ 1,200,000
Accrued management and incentive fees payable	$ 13,700,000		$ 14,400,000
Incentive Awards Plan [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Percentage of the dividends paid to common equity holders created employee pool	6.75%
Percentage of pool vested	50.00%
Vested pool, percentage	75.00%
Fully vested pool, percentage	27.00%
Percentage of pool vesting upon receipt of dividends	23.00%
Description of incentive management fee awards to employees vesting schedule	Approximately 50% of the pool was 75% vested as of March 31, 2016, with the remainder contingent on continued employment with an affiliate of our Manager and our receipt of distributions from CT Legacy Partners. Of the remaining 50% of the pool, 27% is fully vested as a result of an acceleration event, and 23% vest only upon our receipt of distributions from CT Legacy Partners.
Accrued payables, awards	$ 664,000		$ 1,300,000

Other Expenses - Schedule of Ge

Other Expenses - Schedule of General and Administrative Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Professional services	$ 890	$ 700
Operating and other costs	869	759
Subtotal	1,759	1,459
Non-cash and CT Legacy Portfolio compensation expenses
Restricted class A common stock earned	4,593	3,203
Subtotal	4,986	6,104
General and administrative expenses	6,795	7,663
General and Administrative Expense [Member]
Non-cash and CT Legacy Portfolio compensation expenses
Director stock-based compensation	94	94
CT Legacy Partners [Member]
Non-cash and CT Legacy Portfolio compensation expenses
Management incentive awards plan	129	1,030
Blackstone [Member]
Non-cash and CT Legacy Portfolio compensation expenses
General and administrative expenses	6,745	7,563
REIT [Member]
Non-cash and CT Legacy Portfolio compensation expenses
General and administrative expenses	50	100
CT Opportunity Partners I, LP [Member]
Non-cash and CT Legacy Portfolio compensation expenses
Management incentive awards plan	$ 170	$ 1,777

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended
	May. 31, 2013	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Tax Credit Carryforward [Line Items]
Annual distribution of net taxable income for U.S. federal income tax not to apply to our earnings that we distribute (percent)		90.00%
Net taxable income subject to distribution (percent)		100.00%
Excise tax rate		4.00%
Income tax provision		$ 241,000	$ 245,000
Deferred tax assets		0		$ 0
Deferred tax liabilities		$ 0		0
Net operating losses carried forward				159,000,000
Net capital losses carried forward				$ 602,000
NOLs expiration date		Dec. 31, 2029
Internal Revenue Service [Member]
Tax Credit Carryforward [Line Items]
Net operating losses and net capital losses		$ 2,000,000
Class A Common Stock [Member]
Tax Credit Carryforward [Line Items]
Common stock, shares issued	25,875,000	285	139
Earliest Tax Year [Member]
Tax Credit Carryforward [Line Items]
Open tax year		2,012
Latest Tax Year [Member]
Tax Credit Carryforward [Line Items]
Open tax year		2,015

Stock-Based Incentive Plans - A

Stock-Based Incentive Plans - Additional Information (Detail) $ in Millions	Mar. 31, 2016USD ($)Plansshares	Mar. 31, 2016USD ($)Plansshares	Dec. 31, 2015shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of benefit plans | Plans	5	5
Restricted Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares, vesting period		3 years
Number of shares of restricted class A common stock outstanding	1,199,997	1,199,997	1,114,908
Unrecognized compensation cost relating to nonvested share-based compensation | $	$ 30.3	$ 30.3
Unrecognized compensation cost expected to be recognized over weighted average period	1 year 2 months 12 days
Vest in 2016 [Member] | Restricted Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of restricted class A common stock outstanding	517,076	517,076
Vest in 2017 [Member] | Restricted Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of restricted class A common stock outstanding	446,779	446,779
Vest in 2018 [Member] | Restricted Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of restricted class A common stock outstanding	236,142	236,142
Stock Incentive Current Plan [Member] | Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available under plan	47,782	47,782
Maximum number of shares available under plan	2,160,106	2,160,106
Expired Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available under plan	0	0

Stock-Based Incentive Plans - M

Stock-Based Incentive Plans - Movement in Outstanding Shares of Restricted Class A Common Stock and Weighted-Average Grant Date Fair Value Per Share (Detail) - Restricted Class A Common Stock [Member]	3 Months Ended
	Mar. 31, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Class A Common Stock, Beginning Balance | shares	1,114,908
Restricted Class A Common Stock, Granted | shares	245,225
Restricted Class A Common Stock, Vested | shares	(124,709)
Restricted Class A Common Stock, Forfeited | shares	(35,427)
Restricted Class A Common Stock, Ending Balance | shares	1,199,997
Weighted-Average Grant Date Fair Value Per Share, Beginning Balance | $ / shares	$ 27.64
Weighted-Average Grant Date Fair Value Per Share, Granted | $ / shares	26.51
Weighted-Average Grant Date Fair Value Per Share, Vested | $ / shares	27.01
Weighted-Average Grant Date Fair Value Per Share, Forfeited | $ / shares	27.49
Weighted-Average Grant Date Fair Value Per Share, Ending Balance | $ / shares	$ 27.47

Fair Values - Assets and Liabil

Fair Values - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Derivatives	$ 625	$ 8,657
Other assets	11,826	14,220
Liabilities
Derivatives	9,289	1,448
Level 2 [Member]
Assets
Derivatives	625	8,657
Other assets	1,605	1,659
Liabilities
Derivatives	9,289	1,448
Level 3 [Member]
Assets
Other assets	$ 10,221	$ 12,561

Fair Values - Reconciliation of

Fair Values - Reconciliation of Beginning and Ending Balances of Assets Measured at Fair Value on Recurring Basis Using Level 3 Inputs (Detail) - Level 3 [Member] - Recurring [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning	$ 12,561	$ 47,507
Proceeds from investment realizations	(2,406)	(15,038)
Adjustments to fair value included in earnings
Gain on investments at fair value	66	17,498
Balance, ending	$ 10,221	$ 49,967

Fair Values - Additional Inform

Fair Values - Additional Information (Detail) - Recurring [Member] - Level 3 [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 10,221	$ 12,561	$ 49,967	$ 47,507
Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 10,200

Fair Values - Schedule of Detai

Fair Values - Schedule of Details of Carrying Amount, Face Amount, and Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financial liabilities
Loan participations sold	$ 476,894	$ 497,032
Carrying Amount [Member]
Financial assets
Cash and cash equivalents	110,622	96,450
Restricted cash	434	9,556
Loans receivable, net	9,313,763	9,077,007
Financial liabilities
Secured debt agreements	6,311,659	6,116,105
Loan participations sold	476,894	497,032
Convertible notes, net	164,696	164,026
Face Amount [Member]
Financial assets
Cash and cash equivalents	110,622	96,450
Restricted cash	434	9,556
Loans receivable, net	9,346,247	9,108,361
Financial liabilities
Secured debt agreements	6,329,385	6,131,751
Loan participations sold	478,661	498,992
Convertible notes, net	172,500	172,500
Fair Value [Member]
Financial assets
Cash and cash equivalents	110,622	96,450
Restricted cash	434	9,556
Loans receivable, net	9,368,855	9,121,732
Financial liabilities
Secured debt agreements	6,329,385	6,131,751
Loan participations sold	478,661	498,992
Convertible notes, net	$ 179,486	$ 171,344

Transactions with Related Par79

Transactions with Related Parties - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CT Legacy Partners [Member]
Related Party Transaction [Line Items]
Total incentive compensation payments	$ 129,000	$ 1,030,000
Restricted Class A Common Stock [Member]
Related Party Transaction [Line Items]
Restricted shares, vesting period	3 years
Class A Common Stock [Member]
Related Party Transaction [Line Items]
Common stock value	$ 939,000		$ 937,000
Manager [Member]
Related Party Transaction [Line Items]
Management Agreement expiration date	Dec. 19, 2016
Management Agreement renewal term, description	The current term of which expires on December 19, 2016, and will be automatically renewed for a one-year term each anniversary thereafter unless earlier terminated.
Management Agreement renewal term, period	1 year
Accrued management and incentive fees payable	$ 13,700,000		14,400,000
Management fees paid to Manager	14,400,000	6,300,000
Expenses reimbursed to Manager	320,000	139,000
Total incentive compensation payments	4,200,000	1,200,000
Manager [Member] | CT Legacy Partners [Member]
Related Party Transaction [Line Items]
Net sale proceeds	40,100,000
Net sales proceeds, amount received	2,400,000
Manager [Member] | Incentive Awards Plan [Member] | CT Legacy Partners [Member]
Related Party Transaction [Line Items]
Total incentive compensation payments			2,700,000
Incentive compensation amount paid	$ 162,000		$ 2,500,000
Manager [Member] | Class A Common Stock [Member] | Restricted Class A Common Stock [Member]
Related Party Transaction [Line Items]
Issuance of restricted class A common stock	0		334,758	337,941	339,431
Common stock value			$ 9,300,000	$ 9,400,000	$ 8,500,000
Non-cash expense	$ 2,100,000	1,400,000
Manager [Member] | Class A Common Stock [Member] | Restricted Class A Common Stock [Member] | Stock Incentive Current Plan [Member]
Related Party Transaction [Line Items]
Restricted shares, vesting period	3 years
Affiliates of Manager [Member] | Third-Party Service Provider [Member]
Related Party Transaction [Line Items]
Administrative services expenses incurred	$ 90,000	75,000
BXMT Advisors Limited Liability Company and Affiliates [Member]
Related Party Transaction [Line Items]
Preferred distributions payable to affiliate of our Manager	44,000		$ 83,000
Payments of preferred distributions to affiliate of our Manager	$ 224,000	$ 452,000

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	Mar. 31, 2016USD ($)LoansDirectors	Mar. 31, 2016USD ($)LoansInstallments	Dec. 31, 2015USD ($)
Commitments And Contingencies [Line Items]
Commitments expiration period		4 years	4 years
Number of loans receivable | Loans	71	71
Percentage of compensation paid in cash	40.00%
Percentage of compensation in the form of deferred stock units	60.00%
Number of board of directors | Directors	8
Number of independent directors entitled to annual compensation | Directors	5
Number of equal quarterly installments | Installments		4
CT Investment Management Co LLC [Member] | Internal Revenue Service [Member]
Commitments And Contingencies [Line Items]
Income tax examinations, reserves	$ 0	$ 0
CT Investment Management Co LLC [Member] | New York State Division of Taxation and Finance [Member]
Commitments And Contingencies [Line Items]
Income tax examinations, reserves	0	0
Loans Receivable [Member]
Commitments And Contingencies [Line Items]
Unfunded loan commitments	965,140,000	$ 965,140,000	$ 700,658,000
Five Independent Board of Directors [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	125,000
Three Board of Directors [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	0
Chairperson of Audit Committee [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	$ 12,000

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail)	Apr. 22, 2016USD ($)ExtensionOptions	Apr. 04, 2016USD ($)ExtensionOptions	Mar. 31, 2016USD ($)ExtensionOptions	Dec. 31, 2015USD ($)
Subsequent Event [Line Items]
Maturity date			Aug. 31, 2016
Full Recourse Revolving Credit Facility [Member] | Barclays [Member] | Subsequent Events [Member]
Subsequent Event [Line Items]
Maximum Facility Size		$ 125,000,000
Accrue interest rate, description		Accrue interest at a per annum pricing rate equal to the sum of (i) an applicable base rate or Eurodollar rate and (ii) an applicable margin, in each case, dependent on the applicable type of loan.
Maturity date		Apr. 4, 2018
Maturity period		Subject to two one-year extension options, exercisable at our option.
Number of extension options | ExtensionOptions		2
Term of maturity date		1 year
Revolving Repurchase Facilities [Member]
Subsequent Event [Line Items]
Maximum Facility Size			$ 4,730,915,000	$ 4,804,267,000
Revolving Repurchase Facilities [Member] | MetLife [Member]
Subsequent Event [Line Items]
Maximum Facility Size			$ 695,945,000	$ 750,000,000
Maturity period			Includes five one-year extension options which may be exercised at our sole discretion.
Number of extension options | ExtensionOptions			5
Term of maturity date			1 year
Revolving Repurchase Facilities [Member] | MetLife [Member] | Subsequent Events [Member]
Subsequent Event [Line Items]
Maximum Facility Size	$ 1,000,000,000
Maturity date	Apr. 22, 2022
Maturity period	Inclusive of five one-year extension options, exercisable at our option
Number of extension options | ExtensionOptions	5
Term of maturity date	1 year
Additional credit capacity	$ 304,100,000