10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2018

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE TRANSITION PERIOD FROM                      TO                     

Commission File Number: 001-14788

Blackstone Mortgage Trust, Inc.

(Exact name of Registrant as specified in its charter)

Maryland	94-6181186
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

345 Park Avenue, 42nd Floor

New York, New York 10154

(Address of principal executive offices)(Zip Code)

(212) 655-0220

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the Registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

The number of the Registrant’s outstanding shares of class A common stock, par value $0.01 per share, outstanding as of October 16, 2018 was 119,669,604.

TABLE OF CONTENTS

PART I.	FINANCIAL INFORMATION
ITEM 1.	FINANCIAL STATEMENTS	2
	Consolidated Financial Statements (Unaudited):
	Consolidated Balance Sheets as of September 30, 2018 and December  31, 2017	2
	Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2018 and 2017	3
	Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2018 and 2017	4
	Consolidated Statements of Changes in Equity for the Nine Months Ended September 30, 2018 and 2017	5
	Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2018 and 2017	6
	Notes to Consolidated Financial Statements	8
ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	42
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	62
ITEM 4.	CONTROLS AND PROCEDURES	64
PART II.	OTHER INFORMATION
ITEM 1.	LEGAL PROCEEDINGS	65
ITEM 1A.	RISK FACTORS	65
ITEM 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	65
ITEM 3.	DEFAULTS UPON SENIOR SECURITIES	65
ITEM 4.	MINE SAFETY DISCLOSURES	65
ITEM 5.	OTHER INFORMATION	65
ITEM 6.	EXHIBITS	66
SIGNATURES		67

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

Blackstone Mortgage Trust, Inc.

Consolidated Balance Sheets (Unaudited)

(in thousands, except share data)

	September 30, 2018			December 31, 2017
Assets
Cash and cash equivalents	$	86,987		$	69,654
Restricted cash		—			32,864
Loans receivable, net		12,176,516			10,056,732
Other assets		155,972			99,575
Total Assets	$	12,419,475		$	10,258,825
Liabilities and Equity
Secured debt agreements, net	$	6,841,759		$	5,273,855
Loan participations sold, net		81,044			80,415
Securitized debt obligations, net		1,284,362			1,282,412
Convertible notes, net		780,951			563,911
Other liabilities		123,366			140,826
Total Liabilities		9,111,482			7,341,419
Commitments and contingencies		—			—
Equity
Class A common stock, $0.01 par value, 200,000,000 shares authorized, 119,669,195 and 107,883,860 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively		1,197			1,079
Additional paid-in capital		3,898,841			3,506,861
Accumulated other comprehensive loss		(32,849	)		(29,706	)
Accumulated deficit		(566,417	)		(567,168	)
Total Blackstone Mortgage Trust, Inc. stockholders’ equity		3,300,772			2,911,066
Non-controlling interests		7,221			6,340
Total Equity		3,307,993			2,917,406
Total Liabilities and Equity	$	12,419,475		$	10,258,825

Note: The consolidated balance sheets as of September 30, 2018 and December 31, 2017 include assets of consolidated variable interest entities, or VIEs, that can only be used to settle obligations of each respective VIE, and liabilities of consolidated VIEs for which creditors do not have recourse to Blackstone Mortgage Trust, Inc. As of both September 30, 2018 and December 31, 2017, assets of the consolidated VIEs totaled $1.5 billion and liabilities of the consolidated VIEs totaled $1.3 billion. Refer to Note 15 for additional discussion of the VIEs.

See accompanying notes to consolidated financial statements.

2

Blackstone Mortgage Trust, Inc.

Consolidated Statements of Operations (Unaudited)

(in thousands, except share and per share data)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Income from loans and other investments
Interest and related income	$	203,107		$	146,446		$	550,011		$	391,787
Less: Interest and related expenses		97,955			67,891			255,677			168,917
Income from loans and other investments, net		105,152			78,555			294,334			222,870
Other expenses
Management and incentive fees		18,368			13,243			56,248			40,557
General and administrative expenses		8,443			7,419			25,897			22,219
Total other expenses		26,811			20,662			82,145			62,776
Income before income taxes		78,341			57,893			212,189			160,094
Income tax provision		48			83			272			265
Net income		78,293			57,810			211,917			159,829
Net income attributable to non-controlling interests		(128	)		(88	)		(481	)		(88	)
Net income attributable to Blackstone Mortgage Trust, Inc.	$	78,165		$	57,722		$	211,436		$	159,741
Net income per share of common stock basic and diluted	$	0.67		$	0.61		$	1.90		$	1.68
Weighted-average shares of common stock outstanding, basic and diluted		116,203,140			95,013,087			111,251,864			95,004,188
Dividends declared per share of common stock	$	0.62		$	0.62		$	1.86		$	1.86

See accompanying notes to consolidated financial statements.

3

Blackstone Mortgage Trust, Inc.

Consolidated Statements of Comprehensive Income (Unaudited)

(in thousands)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Net income	$	78,293		$	57,810		$	211,917		$	159,829
Other comprehensive income
Unrealized (loss) gain on foreign currency remeasurement		(2,416	)		16,175			(26,766	)		43,990
Realized and unrealized gain (loss) on derivative financial instruments		1,703			(8,029	)		23,623			(20,150	)
Other comprehensive (loss) income		(713	)		8,146			(3,143	)		23,840
Comprehensive income		77,580			65,956			208,774			183,669
Comprehensive income attributable to non-controlling interests		(128	)		(88	)		(481	)		(88	)
Comprehensive income attributable to Blackstone Mortgage Trust, Inc.	$	77,452		$	65,868		$	208,293		$	183,581

See accompanying notes to consolidated financial statements.

4

Blackstone Mortgage Trust, Inc.

Consolidated Statements of Changes in Equity (Unaudited)

(in thousands)

	Blackstone Mortgage Trust, Inc.
	Class A Common Stock		Additional Paid-In Capital			Accumulated Other Comprehensive (Loss) Income			Accumulated Deficit			Stockholders’ Equity			Non-controlling Interests			Total Equity
Balance at December 31, 2016	$	945	$	3,089,997		$	(56,202	)	$	(541,137	)	$	2,493,603		$	—		$	2,493,603
Shares of class A common stock issued, net		3		—			—			—			3			—			3
Restricted class A common stock earned		—		17,493			—			—			17,493			—			17,493
Issuance of convertible notes		—		964			—			—			964			—			964
Dividends reinvested		—		327			—			(296	)		31			—			31
Deferred directors’ compensation		—		313			—			—			313			—			313
Other comprehensive income		—		—			23,840			—			23,840			—			23,840
Net income		—		—			—			159,741			159,741			88			159,829
Dividends declared on common stock		—		—			—			(176,374	)		(176,374	)		—			(176,374	)
Contributions to non-controlling interests		—		—			—			—			—			6,090			6,090
Balance at September 30, 2017	$	948	$	3,109,094		$	(32,362	)	$	(558,066	)	$	2,519,614		$	6,178		$	2,525,792
Balance at December 31, 2017	$	1,079	$	3,506,861		$	(29,706	)	$	(567,168	)	$	2,911,066		$	6,340		$	2,917,406
Shares of class A common stock issued, net		118		369,672			—			—			369,790			—			369,790
Restricted class A common stock earned		—		20,110			—			—			20,110			—			20,110
Issuance of convertible notes		—		1,462			—			—			1,462			—			1,462
Conversion of convertible notes		—		(20	)		—			—			(20	)		—			(20	)
Dividends reinvested		—		381			—			(342	)		39			—			39
Deferred directors’ compensation		—		375			—			—			375			—			375
Other comprehensive income		—		—			(3,143	)		—			(3,143	)		—			(3,143	)
Net income		—		—			—			211,436			211,436			481			211,917
Dividends declared on common stock		—		—			—			(210,343	)		(210,343	)		—			(210,343	)
Contributions from non-controlling interests		—		—			—			—			—			4,500			4,500
Distributions to non-controlling interests		—		—			—			—			—			(4,100	)		(4,100	)
Balance at September 30, 2018	$	1,197	$	3,898,841		$	(32,849	)	$	(566,417	)	$	3,300,772		$	7,221		$	3,307,993

See accompanying notes to consolidated financial statements.

5

Blackstone Mortgage Trust, Inc.

Consolidated Statements of Cash Flows (Unaudited)

(in thousands)

	Nine Months Ended September 30,
	2018			2017
Cash flows from operating activities
Net income	$	211,917		$	159,829
Adjustments to reconcile net income to net cash provided by operating activities
Non-cash compensation expense		20,488			17,809
Amortization of deferred fees on loans and debt securities		(35,955	)		(28,887	)
Amortization of deferred financing costs and premiums/discount on debt obligations		20,993			16,356
Changes in assets and liabilities, net
Other assets		(9,709	)		(219	)
Other liabilities		15,001			11,651
Net cash provided by operating activities		222,735			176,539
Cash flows from investing activities
Origination and fundings of loans receivable		(5,222,803	)		(2,314,721	)
Principal collections and sales proceeds from loans receivable		2,503,454			1,976,271
Loan contributed to securitization		512,002			—
Investment in debt securities held-to-maturity		(95,937	)		—
Origination and exit fees received on loans receivable		74,111			38,434
Receipts under derivative financial instruments		34,975			6,115
Payments under derivative financial instruments		(14,031	)		(18,115	)
Return of collateral deposited under derivative agreements		28,870			8,980
Collateral deposited under derivative agreements		(32,110	)		(16,651	)
Net cash used in investing activities		(2,211,469	)		(319,687	)

continued…

See accompanying notes to consolidated financial statements.

6

Blackstone Mortgage Trust, Inc.

Consolidated Statements of Cash Flows (Unaudited)

(in thousands)

	Nine Months Ended September 30,
	2018			2017
Cash flows from financing activities
Borrowings under secured debt agreements	$	5,749,678		$	2,776,058
Repayments under secured debt agreements		(4,147,893	)		(2,481,250	)
Proceeds from sale of loan participations		86,339			33,193
Repayment of loan participations		(85,875	)		(381,310	)
Payment of deferred financing costs		(18,995	)		(13,591	)
Contributions from non-controlling interests		4,500			6,090
Distributions to non-controlling interests		(4,100	)		—
Net proceeds from issuance of convertible notes		214,775			394,074
Repayment of convertible notes		(192	)		—
Net proceeds from issuance of class A common stock		369,787			31
Dividends paid on class A common stock		(203,065	)		(176,195	)
Net cash provided by financing activities		1,964,959			157,100
Net decrease in cash, cash equivalents, and restricted cash		(23,775	)		13,952
Cash, cash equivalents, and restricted cash at beginning of period		102,518			75,567
Effects of currency translation on cash, cash equivalents, and restricted cash		8,244			4,566
Cash, cash equivalents, and restricted cash at end of period	$	86,987		$	94,085
Supplemental disclosure of cash flows information
Payments of interest	$	(224,320	)	$	(141,124	)
Payments of income taxes	$	(546	)	$	(220	)
Supplemental disclosure of non-cash investing and financing activities
Dividends declared, not paid	$	(74,195	)	$	(58,793	)
Loan principal payments held by servicer, net	$	3,577		$	513
Consolidation of loans receivable of a VIE	$	—		$	500,000
Consolidation of securitized debt obligations of a VIE	$	—		$	(474,620	)

See accompanying notes to consolidated financial statements.

7

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements

(Unaudited)

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 senior loans collateralized by commercial real estate in North America, Europe, and Australia. Our investment objective is to preserve and protect shareholder capital while producing attractive risk-adjusted returns primarily through dividends generated from current income from our loan portfolio. 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.” Our principal executive offices are located at 345 Park Avenue, 42^nd Floor, New York, New York 10154. We were incorporated in Maryland in 1998, when we reorganized from a California common law business trust into a Maryland corporation.

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 an 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.

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, 2017 filed with the Securities and Exchange Commission, or the SEC.

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.

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.

In the third quarter of 2018, we contributed a loan to a single asset securitization vehicle, or the 2018 Single Asset Securitization, which is a VIE, and invested in the related subordinate risk retention position. We are not the primary beneficiary of the VIE because we do not have the power to direct the activities that most significantly affect the VIE’s economic performance and, therefore, do not consolidate the 2018 Single Asset Securitization on our balance sheet. We have classified the subordinate risk retention position as a held-to-maturity debt security that is included in other assets on our consolidated balance sheets. Refer to Note 15 for additional discussion of our VIEs.

8

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

In April 2017, we entered into a joint venture, or our Multifamily Joint Venture, with Walker & Dunlop Inc. to originate, hold, and finance multifamily bridge loans. Pursuant to the terms of the agreements governing the joint venture, Walker & Dunlop contributed 15% of the venture’s equity capital and we contributed 85%. We consolidate the Multifamily Joint Venture as we have a controlling financial interest. The non-controlling interests included on our consolidated balance sheets represent the equity interests in our Multifamily Joint Venture that are owned by Walker & Dunlop. A portion of our Multifamily Joint Venture’s consolidated equity and results of operations are allocated to these non-controlling interests based on Walker & Dunlop’s pro rata ownership of our Multifamily Joint Venture.

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 portfolio and debt securities 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 and recorded over the term of the loan or debt security 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, Cash Equivalents, and Restricted Cash

Cash and cash equivalents represent cash held in banks 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 represents cash held in a segregated bank account related to a letter of credit.

The following table provides a reconciliation of cash, cash equivalents, and restricted cash in our consolidated balance sheets to the total amount shown in our consolidated statements of cash flows ($ in thousands):

	September 30, 2018		September 30, 2017
Cash and cash equivalents	$	86,987	$	61,221
Restricted cash		—		32,864
Total cash, cash equivalents, and restricted cash shown in our consolidated statements of cash flows	$	86,987	$	94,085

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.

9

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

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 it 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: A loan that has a risk of realizing a principal loss.
5 -	Impaired/Loss Likely: A loan that has a very high risk of realizing a principal loss or has otherwise incurred a principal loss.

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 accretes from its allocated purchase price to its expected collection value over the life of the loan, consistent with the other loans in our portfolio.

Debt Securities Held-to-Maturity

We classify our debt securities as held-to-maturity, as we have the intent and ability to hold these securities until maturity. We include our debt securities in other assets on our consolidated balance sheets at amortized cost.

If, based on current information and events, there is an adverse change in cash flows expected to be collected from the cash flows previously projected for one of our debt securities, an other-than-temporary impairment is deemed to have occurred. A change in expected cash flows is considered adverse if the present value of the revised cash flows (taking into consideration both the timing and amount of cash flows expected to be collected), discounted using the debt security’s current yield, is less than the present value of the previously estimated remaining cash flows. If an other-than-temporary impairment is considered to have occurred, the debt security is written down to fair value. The total other-than-temporary impairment is bifurcated into (i) the amount related to expected credit losses, and (ii) the amount related to fair value adjustments in excess of expected credit losses. The other-than-temporary impairment related to expected credit losses is calculated by comparing the amortized cost basis of the security to the present value of cash flows expected to be collected, discounted at the security’s current yield, and is recognized in earnings in the consolidated statement of operations. The remaining other-than-temporary impairment that is not related to expected credit losses is recognized in other comprehensive income (loss). A portion of other-than-temporary impairments recognized through earnings is accreted back to the amortized cost basis of the security through interest income, while amounts recognized through other comprehensive income (loss) are amortized over the life of the security with no impact on earnings.

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 non-designated hedge. For all derivatives other than those designated as non-designated hedges, we formally document our hedge relationships and designation at the contract’s 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 and the changes in fair value of the instrument are included in net income prospectively. Changes in

10

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

the fair value of our derivative instruments that qualify as hedges are reported as a component of accumulated other comprehensive income (loss) on our consolidated financial statements. Deferred gains and losses are reclassified out of accumulated other comprehensive income (loss) and into net income in the same period or periods during which the hedged transaction affects earnings, and are presented in the same line item as the earnings effect of the hedged item. For cash flow hedges, this is typically when the periodic swap settlements are made, while for net investment hedges, this occurs when the hedged item is sold or substantially liquidated. To the extent a derivative does not qualify for hedge accounting and is deemed a non-designated hedge, the changes in its fair value are included in net income concurrently.

Secured Debt Agreements

Where applicable, 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.

Senior Loan Participations

In certain instances, we finance our loans through the non-recourse syndication of a senior loan interest to a third-party. Depending on the particular structure of the syndication, the senior loan interest may remain on our GAAP balance sheet or, in other cases, the sale will be recognized and the senior loan interest will no longer be included in our consolidated financial statements. When these sales are not recognized under GAAP we reflect the transaction by recording a loan participations sold liability on our consolidated balance sheet, however this gross presentation does not impact stockholders’ equity or net income. When the sales are recognized, our balance sheet only includes our remaining subordinate loan and not the non-consolidated senior interest we sold.

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 respective issuance dates based on our nonconvertible debt borrowing rate. The equity component of each series of our 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 such 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 such 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 of the FASB, 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.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

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 the 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, which 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 and cash equivalents approximates fair value.

• Restricted cash: The carrying amount of restricted cash approximates fair value.

• Loans receivable, net: The fair values of these loans were estimated by our Manager based on a discounted cash flow methodology, taking into consideration various 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.

• Debt securities held-to-maturity: The fair value of these instruments was estimated by utilizing third-party pricing service providers. In determining the value of a particular investment, pricing service providers may use broker-dealer quotations, reported trades, or valuation estimates from their internal pricing models to determine the reported price.

• Derivative financial instruments: The fair value of our foreign currency and interest rate contracts was estimated 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, net: The fair value of these instruments was estimated based on the rate at which a similar credit facility would currently be priced.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

• Loan participations sold, net: The fair value of these instruments was estimated based on the value of the related loan receivable asset.

• Securitized debt obligations, net: The fair value of these instruments was estimated by utilizing third-party pricing service providers. In determining the value of a particular investment, pricing service providers may use broker-dealer quotations, reported trades, or valuation estimates from their internal pricing models to determine the reported price.

• Convertible notes, net: Each series of the convertible notes is actively traded and their fair values were obtained using quoted market prices.

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 individuals employed by an affiliate of our Manager 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 our 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 our 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 (loss).

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.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

Recent Accounting Pronouncements

In June 2018, the FASB issued ASU 2018-07 “Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting,” or ASU 2018-07. ASU 2018-07 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The guidance is intended to align the accounting for such payments to nonemployees with the existing requirements for share-based payments granted to employees. Upon adoption of ASU 2018-07, the cost of our long-term incentive plans will be a fixed amount determined based on the grant date fair value of shares granted, rather than the prior methodology that recognizes a variable cost based on the fair value of such shares as of their vesting dates. ASU 2018-07 is to be adopted through a cumulative-effect adjustment to retained earnings for outstanding share-based payments to nonemployees as of the beginning of the fiscal year in which the guidance is effective. We adopted ASU 2018-07 in the third quarter of 2018 and it did not have an impact on our consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13 “Financial Instruments – Credit Losses – Measurement of Credit Losses on Financial Instruments (Topic 326),” or ASU 2016-13. ASU 2016-13 significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. ASU 2016-13 will replace the “incurred loss” model under existing guidance with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. It also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 and is to be adopted through a cumulative-effect adjustment to retained earnings as of January 1, 2020. While we are currently evaluating the impact ASU 2016-13 will have on our consolidated financial statements, we expect that the adoption will result in an increased amount of provisions for potential loan losses as well as the recognition of such provisions earlier in the lending cycle. We currently do not have any provision for loan losses in our consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” or ASU 2014-09. ASU 2014-09 broadly amends the accounting guidance for revenue recognition. ASU 2014-09 is effective for the first interim or annual period beginning after December 15, 2017, and is to be applied retrospectively. We adopted ASU 2014-09 in the first quarter of 2018 and it did not have a material impact on our consolidated financial statements.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

3. LOANS RECEIVABLE, NET

The following table details overall statistics for our loans receivable portfolio ($ in thousands):

	September 30, 2018			December 31, 2017
Number of loans		112			110
Principal balance	$	12,260,103		$	10,108,226
Net book value	$	12,176,516		$	10,056,732
Unfunded loan commitments(1)	$	3,046,350		$	1,573,107
Weighted-average cash coupon(2)		5.61	%		5.55	%
Weighted-average all-in yield(2)		5.94	%		5.95	%
Weighted-average maximum maturity (years)(3)		3.8			3.5

(1)	Unfunded commitments will primarily be funded to finance our borrowers’ construction or development of real estate-related assets, capital improvements of existing assets, or lease-related expenditures. These commitments will generally be funded over the term of each loan, subject in certain cases to an expiration date.
(2)	Our floating rate loans are indexed to various benchmark rates, with 83% and 92% of our floating rate loans by principal balance indexed to USD LIBOR as of September 30, 2018 and December 31, 2017, respectively. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, and purchase discounts, as well as the accrual of exit fees. Cash coupon and all-in yield assume applicable floating benchmark rates 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 September 30, 2018, 86% of our loans by principal balance were subject to yield maintenance or other prepayment restrictions and 14% were open to repayment by the borrower without penalty. As of December 31, 2017, 75% of our loans were subject to yield maintenance or other prepayment restrictions and 25% were open to repayment by the borrower without penalty.

Activity relating to our loans receivable portfolio was as follows ($ in thousands):

	Principal Balance			Deferred Fees / Other Items(1)			Net Book Value
December 31, 2017	$	10,108,226		$	(51,494	)	$	10,056,732
Loan fundings		5,222,803			—			5,222,803
Loan repayments		(2,452,811	)		—			(2,452,811	)
Loan contributed to securitization		(517,500	)		5,498			(512,002	)
Unrealized (loss) gain on foreign currency translation		(100,615	)		678			(99,937	)
Deferred fees and other items		—			(74,111	)		(74,111	)
Amortization of fees and other items		—			35,842			35,842
September 30, 2018	$	12,260,103		$	(83,587	)	$	12,176,516

(1)   Other items primarily consist of purchase discounts or premiums, exit fees, and deferred origination expenses.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

The tables below detail the property type and geographic distribution of the properties securing the loans in our portfolio ($ in thousands):

September 30, 2018
Property Type	Number of Loans		Net Book Value		Total Loan Exposure(1)(2)		Percentage of Portfolio
Office		49	$	5,956,675	$	6,006,534		47%
Hotel		15		1,992,889		2,069,818		16
Multifamily		32		1,894,001		1,903,572		15
Spanish Assets		1		1,152,487		1,160,400		9
Retail		4		336,787		337,334		3
Condominium		2		84,429		158,462		1
Other		9		759,248		1,090,711		9
		112	$	12,176,516	$	12,726,831		100%
Geographic Location	Number of Loans		Net Book Value		Total Loan Exposure(1)(2)		Percentage of Portfolio
United States
Northeast		30	$	3,796,633	$	3,830,021		29%
West		25		2,543,743		2,637,582		21
Southeast		18		2,025,381		2,034,852		16
Midwest		8		901,310		906,102		7
Southwest		13		477,809		480,792		4
Northwest		2		141,199		141,630		1
Subtotal		96		9,886,075		10,030,979		78
International
Spain		1		1,152,487		1,160,400		9
United Kingdom		5		492,790		837,688		7
Canada		5		335,957		332,841		3
Australia		2		218,286		220,335		2
Belgium		1		71,494		71,945		1
Germany		1		11,814		65,000		—
Netherlands		1		7,613		7,643		—
Subtotal		16		2,290,441		2,695,852		22
Total		112	$	12,176,516	$	12,726,831		100%

(1)	In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $466.7 million of such non-consolidated senior interests as of September 30, 2018.
(2)	Excludes investment exposure to the $1.0 billion 2018 Single Asset Securitization. See Note 4 for details of the subordinated risk retention interest we own in the 2018 Single Asset Securitization.

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(Unaudited)

December 31, 2017
Property Type	Number of Loans	Net Book Value		Total Loan Exposure(1)		Percentage of Portfolio
Office	53	$	5,773,972	$	5,807,170		53%
Hotel	15		1,830,568		1,905,497		17
Multifamily	25		1,220,423		1,228,959		11
Retail	6		487,473		940,980		8
Condominium	2		142,342		268,751		2
Other	9		601,954		942,251		9
	110	$	10,056,732	$	11,093,608		100%
Geographic Location	Number of Loans	Net Book Value		Total Loan Exposure(1)		Percentage of Portfolio
United States
Northeast	26	$	2,857,948	$	2,871,219		26%
West	29		2,672,069		2,816,276		24
Southeast	17		2,007,202		2,470,992		22
Midwest	9		856,559		862,578		8
Southwest	10		380,204		380,120		3
Northwest	2		283,381		286,221		3
Subtotal	93		9,057,363		9,687,406		86
International
United Kingdom	6		440,317		794,789		7
Canada	7		415,893		412,343		4
Belgium	1		73,779		74,431		1
Germany	1		12,237		67,399		1
Netherlands	2		57,143		57,240		1
Subtotal	17		999,369		1,406,202		14
Total	110	$	10,056,732	$	11,093,608		100%

(1)   In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $985.4 million of such non-consolidated senior interests as of December 31, 2017.

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.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following table allocates the principal balance and net book value of our loans receivable based on our internal risk ratings ($ in thousands):

September 30, 2018							December 31, 2017
Risk Rating		Number of Loans	Net Book Value		Total Loan Exposure(1)(2)		Risk Rating		Number of Loans	Net Book Value		Total Loan Exposure(1)
	1	1	$	53,849	$	53,873		1	1	$	31,842	$	31,890
	2	43		4,167,871		4,272,068		2	41		3,512,709		3,521,701
	3	68		7,954,796		8,400,890		3	67		6,491,617		7,519,465
	4	—		—		—		4	1		20,564		20,552
	5	—		—		—		5	—		—		—
		112	$	12,176,516	$	12,726,831			110	$	10,056,732	$	11,093,608

(1) In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $466.7 million and $985.4 million of such non-consolidated senior interests as of September 30, 2018 and December 31, 2017, respectively.

(2) Excludes investment exposure to the $1.0 billion 2018 Single Asset Securitization. See Note 4 for details of the subordinated risk retention interest we own in the 2018 Single Asset Securitization.

The weighted-average risk rating of our total loan exposure was 2.7 as of both September 30, 2018 and December 31, 2017. We had one loan with a risk rating of “4” in our portfolio as of December 31, 2017, which was repaid in full in April 2018.

We did not have any impaired loans, nonaccrual loans, or loans in maturity default as of September 30, 2018 or December 31, 2017.

Multifamily Joint Venture

As discussed in Note 2, we entered into a Multifamily Joint Venture in April 2017. As of September 30, 2018 and December 31, 2017, our Multifamily Joint Venture held $222.7 million and $182.2 million of loans, respectively, which are included in the loan disclosures above. Refer to Note 2 for additional discussion of our Multifamily Joint Venture.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

4. OTHER ASSETS AND LIABILITIES

The following table details the components of our other assets ($ in thousands):

	September 30, 2018		December 31, 2017
Debt securities held-to-maturity(1)	$	96,050	$	—
Accrued interest receivable		45,762		38,573
Collateral deposited under derivative agreements		7,360		4,120
Loan portfolio payments held by servicer(2)		3,902		54,759
Derivative assets		2,719		1,214
Prepaid expenses		151		798
Prepaid taxes		28		31
Other		—		80
Total	$	155,972	$	99,575

(1)	Represents a $99.0 million subordinate risk retention interest in the $1.0 billion 2018 Single Asset Securitization, with a yield to full maturity of L+10.0% and a maximum maturity date of June 9, 2025, assuming all extension options are exercised by the borrower. Refer to Note 15 for additional discussion.
(2)	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.

The following table details the components of our other liabilities ($ in thousands):

	September 30, 2018		December 31, 2017
Accrued dividends payable	$	74,195	$	66,888
Accrued interest payable		23,701		14,162
Accrued management and incentive fees payable		18,368		14,284
Derivative liabilities		3,676		4,911
Accounts payable and other liabilities		3,426		2,125
Secured debt repayments pending servicer remittance(1)		—		38,456
Total	$	123,366	$	140,826

(1)   Represents pending transfers from our third-party loan servicer that were remitted to our banking counterparties during the subsequent remittance cycle.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

5. SECURED DEBT AGREEMENTS, NET

Our secured debt agreements include credit facilities, the GE portfolio acquisition facility, asset-specific financings, and a revolving credit agreement. The following table details our secured debt agreements ($ in thousands):

	Secured Debt Agreements Borrowings Outstanding
	September 30, 2018			December 31, 2017
Credit facilities	$	4,850,911		$	4,068,249
Asset-specific financings		1,499,286			518,864
GE portfolio acquisition facility		512,059			703,423
Revolving credit agreement		—			—
Total secured debt agreements	$	6,862,256		$	5,290,536
Deferred financing costs(1)		(20,497	)		(16,681	)
Net book value of secured debt	$	6,841,759		$	5,273,855

(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.

Credit Facilities

During the nine months ended September 30, 2018, we added one new credit facility, providing an additional $1.0 billion of credit capacity, and increased the maximum facility size of one of our existing credit facilities, providing an additional $250.0 million of credit capacity.

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Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following tables detail our credit facilities ($ in thousands):

	September 30, 2018
	Maximum		Credit Borrowings						Collateral
Lender	Facility Size(1)		Potential(2)		Outstanding		Available(2)		Assets(3)
Bank of America	$	1,000,000	$	863,592	$	863,592	$	—	$	1,091,860
Wells Fargo		2,000,000		1,160,678		850,687		309,991		1,577,251
MetLife		1,000,000		737,770		737,770		—		946,933
Barclays		1,000,000		617,360		617,360		—		771,700
Citibank(4)		750,000		576,369		480,129		96,240		730,723
JP Morgan		500,000		435,095		332,909		102,186		564,070
Morgan Stanley(5)		651,550		329,256		278,770		50,486		461,760
Deutsche Bank		500,000		277,247		277,247		—		380,986
Société Générale(6)		464,160		235,229		235,229		—		298,951
Goldman Sachs - Multi. JV(7)		250,000		117,498		117,498		—		148,099
Bank of America - Multi. JV(7)		200,000		59,720		59,720		—		74,650
	$	8,315,710	$	5,409,814	$	4,850,911	$	558,903	$	7,046,983

	December 31, 2017
	Maximum		Credit Borrowings						Collateral
Lender	Facility Size(1)		Potential(2)		Outstanding		Available(2)		Assets(3)
Wells Fargo	$	2,000,000	$	1,289,135	$	1,170,801	$	118,334	$	1,680,325
MetLife		1,000,000		807,164		807,164		—		1,039,231
Bank of America		750,000		573,542		573,542		—		765,049
JP Morgan		500,000		443,496		319,755		123,741		579,218
Société Générale(6)		480,200		300,871		300,871		—		373,181
Deutsche Bank		500,000		295,743		295,743		—		399,203
Citibank(4)		800,125		354,354		240,881		113,473		455,433
Morgan Stanley(5)		675,650		456,344		216,044		240,300		591,168
Bank of America - Multi. JV(7)		200,000		85,560		85,560		—		106,950
Goldman Sachs - Multi. JV(7)		250,000		57,888		57,888		—		75,225
	$	7,155,975	$	4,664,097	$	4,068,249	$	595,848	$	6,064,983

(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)	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 credit facility.
(3)	Represents the principal balance of the collateral assets.
(4)	As of September 30, 2018, the Citibank facility was denominated in U.S. dollars. As of December 31, 2017, the maximum facility size was composed of a $500.0 million facility denominated in U.S. dollars plus a €250.0 million facility, which translated to $300.1 million as of such date.
(5)	As of September 30, 2018 and December 31, 2017, the Morgan Stanley maximum facility size was £500.0 million, which translated to $651.6 million and $675.7 million, respectively.
(6)	As of September 30, 2018 and December 31, 2017, the Société Générale maximum facility size was €400.0 million, which translated to $464.2 million and $480.2 million, respectively.
(7)	These facilities finance the loan investments of our consolidated Multifamily Joint Venture. Refer to Note 2 for additional discussion of our Multifamily Joint Venture.

21

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The weighted-average outstanding balance of our credit facilities was $4.4 billion for the nine months ended September 30, 2018. As of September 30, 2018, we had aggregate borrowings of $4.9 billion outstanding under our credit facilities, with a weighted-average cash coupon of LIBOR plus 1.77% per annum, a weighted-average all-in cost of credit, including associated fees and expenses, of LIBOR plus 1.98% per annum, and a weighted-average advance rate of 79.2%. As of September 30, 2018, outstanding borrowings under these facilities had a weighted-average maturity, excluding extension options and term-out provisions, of 1.5 years.

The weighted-average outstanding balance of our credit facilities was $4.2 billion for the nine months ended December 31, 2017. As of December 31, 2017, we had aggregated borrowings of $4.1 billion outstanding under our credit facilities, with a weighted-average cash coupon of LIBOR plus 1.90% per annum, a weighted-average all-in cost of credit, including associated fees and expenses, of LIBOR plus 2.12% per annum, and a weighted-average advance rate of 78.7%. As of December 31, 2017, outstanding borrowings under these facilities had a weighted-average maturity, excluding extension options and term-out provisions, of 1.5 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.

The following tables outline the key terms of our credit facilities as of September 30, 2018:

Lender	Currency	Guarantee(1)	Margin Call(2)	Term/Maturity
Morgan Stanley	$ /  £ / €	25%	Collateral marks only	March 3, 2020
Goldman Sachs - Multi. JV(3)	$	25%	Collateral marks only	July 12, 2020(4)
JP Morgan	$ /  £	50%	Collateral marks only	January 7, 2021
Bank of America - Multi. JV(3)	$	43%	Collateral marks only	July 19, 2021(5)
Deutsche Bank	$	32%	Collateral marks only	August 9, 2021(6)
Barclays	$	25%	Collateral marks only	March 29, 2023(7)
MetLife	$	50%	Collateral marks only	April 22, 2023(8)
Bank of America	$	50%	Collateral marks only	May 21, 2023(9)
Citibank	$  / £ / €	25%	Collateral marks only	Term matched(10)
Société Générale	$  / £ /  €	25%	Collateral marks only	Term matched(10)
Wells Fargo	$	25%	Collateral marks only	Term matched(10)

(1)	Other than amounts guaranteed based on specific collateral asset types, borrowings under our credit facilities are non-recourse to us.
(2)	Margin call provisions under our credit facilities do not permit valuation adjustments based on capital markets events, and are limited to collateral-specific credit marks.
(3)	These facilities finance the loan investments of our consolidated Multifamily Joint Venture. Refer to Note 2 for additional discussion of our Multifamily Joint Venture.
(4)	Includes a one-year extension option which may be exercised at our sole discretion.
(5)	Includes two one-year extension options which may be exercised at our sole discretion.
(6)	Includes two one-year extension options which may be exercised at our sole discretion.
(7)	Includes four one-year extension options which may be exercised at our sole discretion.
(8)	Includes four one-year extension options which may be exercised at our sole discretion.
(9)	Includes two one-year extension options which may be exercised at our sole discretion.
(10)	These credit 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.

22

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

Currency	Potential Borrowings		Outstanding Borrowings(1)		Floating Rate Index	Spread(2)	Advance Rate(3)
$		$  5,024,025		$  4,551,603	1-month USD LIBOR	1.75%	79.2%
€		€       54,869		€       12,100	3-month EURIBOR	2.28%	80.0%
£		£     247,194		£     218,914	3-month GBP LIBOR	1.97%	79.0%
		$  5,409,815		$  4,850,911		1.77%	79.2%

(1)	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 credit facility.
(2)	Represents weighted-average spread over the applicable floating rate index, based on borrowings outstanding.
(3)	Represents weighted-average advance rate based on the approved outstanding principal balance of the collateral assets pledged.

Asset-Specific Financings

During the nine months ended September 30, 2018, we entered into an €800.0 million asset-specific financing secured by a €1.0 billion senior loan. The following tables detail our asset-specific financings ($ in thousands):

	September 30, 2018
Asset-Specific Financings	Count	Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Guarantee(2)		Wtd. Avg. Term(3)
Collateral assets	5	$	1,905,475	$	1,895,094		L+3.61	%		n/a		Sep. 2022
Financing provided(4)	5	$	1,499,286	$	1,492,614		L+1.77	%	$	1,178,874		Sep. 2022
	December 31, 2017
Asset-Specific Financings	Count	Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Guarantee(2)		Wtd. Avg. Term(3)
Collateral assets	6	$	682,259	$	677,296		L+4.76	%		n/a		Dec. 2020
Financing provided(4)	6	$	518,864	$	517,088		L+2.50	%	$	162,475		Dec. 2020

(1)	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, yield/cost includes the amortization of deferred origination fees / financing costs.
(2)	Other than amounts guaranteed on an asset-by-asset basis, borrowings under our asset-specific financings are non-recourse to us.
(3)	The weighted-average term is determined based on the maximum maturity of the corresponding loans, assuming all extension options are exercised by the borrower. Each of our asset-specific financings are term-matched to the corresponding collateral loans.
(4)	As of September 30, 2018 and December 31, 2017, borrowings of $517.8 million and $394.8 million, respectively, under these asset specific financings are cross collateralized with related credit facilities with the same lenders.

The weighted-average outstanding balance of our asset-specific financings was $1.3 billion for the nine months ended September 30, 2018 and $522.5 million for the nine months ended December 31, 2017.

23

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

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. The GE portfolio acquisition facility is non-revolving and consists of a single master repurchase agreement providing for asset-specific borrowings for each collateral asset. The following tables detail our asset-specific borrowings related to the GE portfolio acquisition ($ in thousands):

	September 30, 2018
GE Portfolio Acquisition Facility	Count	Principal Balance(1)		Book Value		Wtd. Avg. Yield/Cost(2)			Guarantee(3)		Wtd. Avg. Term(4)
Collateral assets	11	$	662,464	$	664,189		5.92	%		n/a		May 2021
Financing provided	11	$	512,059	$	511,346		L+1.77	%	$	250,000		May 2021
	December 31, 2017
GE Portfolio Acquisition Facility	Count	Principal Balance(1)		Book Value		Wtd. Avg. Yield/Cost(2)			Guarantee(3)		Wtd. Avg. Term(4)
Collateral assets	16	$	906,707	$	911,092		5.74	%		n/a		Jul. 2020
Financing provided	16	$	703,423	$	702,337		L+1.72	%	$	250,000		Jul. 2020

(1)	As of September 30, 2018, this facility provided for $608.7 million of financing, of which $512.1 million was outstanding and an additional $96.6 million was available to finance future loan fundings in the GE portfolio. As of December 31, 2017, this facility provided for $816.3 million of financing, of which $703.4 million was outstanding and an additional $112.9 million was available to finance future loan fundings in the GE portfolio.
(2)	In addition to cash coupon, yield/cost includes the amortization of deferred origination fees / financing costs.
(3)	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.
(4)	The weighted-average term is determined based on the maximum maturity of the corresponding loans, assuming all extension options are exercised by the borrower. Each of our asset-specific financings are term-matched to the corresponding collateral loans.

Revolving Credit Agreement

We have a $250.0 million full recourse secured revolving credit agreement with Barclays that is designed to finance first mortgage originations for up to six months as a bridge to term financing or syndication. Advances under the 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 collateral. The maturity date of the facility is April 4, 2020.

During the nine months ended September 30, 2018, the weighted-average outstanding borrowings under the revolving credit agreement was $37.8 million and we recorded interest expense of $2.6 million, including $825,000 of amortization of deferred fees and expenses. As of September 30, 2018, we had no outstanding borrowings under the agreement.

During the nine months ended December 31, 2017, the weighted-average outstanding borrowings under the revolving credit agreement was $40.7 million and we recorded interest expense of $2.6 million, including $703,000 of amortization of deferred fees and expenses. As of December 31, 2017, we had no outstanding borrowings under the agreement.

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 1.4 to 1.0; (ii) our tangible net worth, as defined in the agreements, shall not be less than $2.4 billion as of each measurement date plus 75% of the net cash proceeds of future equity issuances subsequent to September 30, 2018; (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 September 30, 2018 and December 31, 2017, we were in compliance with these covenants.

24

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

6. LOAN PARTICIPATIONS SOLD, NET

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 generally based on the performance of the related loan obligation. The gross presentation of loan participations sold does not impact stockholders’ equity or net income.

The following tables detail our loan participations sold ($ in thousands):

September 30, 2018

Loan Participations Sold

Count

Principal Balance

Book Value

Yield/Cost(1)

Guarantee(2)

Term

Total loan

1

$

106,259

$

105,149

L+6.06

%

n/a

Feb. 2022

Senior participation(3)(4)

1

81,170

81,044

L+4.08

%

n/a

Feb. 2022

December 31, 2017

Loan Participations Sold

Count

Principal Balance

Book Value

Yield/Cost(1)

Guarantee(2)

Term

Total loan

1

$

141,119

$

138,907

L+5.94

%

n/a

Feb. 2022

Senior participation(3)(4)

1

80,706

80,415

L+4.14

%

n/a

Feb. 2022

(1)	Our 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, yield/cost includes the amortization of deferred fees / financing costs.
(2)	As of September 30, 2018 and December 31, 2017, our loan participations sold was non-recourse to us.
(3)	During the three and nine months ended September 30, 2018, we recorded $11.7 million and $15.2 million, respectively, of interest expense related to our loan participations sold. During the three and nine months ended September 30, 2017, we recorded $4.0 million and $9.3 million, respectively, of interest expense related to our loan participations sold.
(4)	The difference between principal balance and book value of loan participations sold is due to deferred financing costs of $126,000 and $291,000, as of September 30, 2018 and December 31, 2017, respectively.

7. SECURITIZED DEBT OBLIGATIONS, NET

We have financed a pool of our loans through a collateralized loan obligation, or the CLO, and have also financed one of our loans through a single asset securitization vehicle, or the 2017 Single Asset Securitization. The CLO and the 2017 Single Asset Securitization have issued securitized debt obligations that are non-recourse to us. Both the CLO and the 2017 Single Asset Securitization are consolidated in our financial statements. Refer to Note 15 for further discussion of our CLO and 2017 Single Asset Securitization.

25

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following tables detail our securitized debt obligations ($ in thousands):

	September 30, 2018
Securitized Debt Obligations	Count		Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Term(2)
Collateralized Loan Obligation
Collateral assets		28	$	1,000,000	$	1,000,000		6.09	%		Feb. 2022
Financing provided		1		817,500		809,944		L+1.74	%		June 2035
2017 Single Asset Securitization
Collateral assets(3)		1		678,963		675,437		L+3.60	%		June 2023
Financing provided		1		474,620		474,418		L+1.65	%		June 2033
Total
Collateral assets		29	$	1,678,963	$	1,675,437		6.00	%
Financing provided(4)		2	$	1,292,120	$	1,284,362		L+1.71	%
	December 31, 2017
Securitized Debt Obligations	Count		Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Term(2)
Collateralized Loan Obligation
Collateral assets		31	$	1,000,000	$	1,000,000		5.16	%		Nov. 2021
Financing provided		1		817,500		808,083		L+1.76	%		June 2035
2017 Single Asset Securitization
Collateral assets(3)		1		656,406		652,880		L+3.60	%		June 2023
Financing provided		1		474,620		474,328		L+1.94	%		June 2033
Total
Collateral assets		32	$	1,656,406	$	1,652,880		5.17	%
Financing provided(4)		2	$	1,292,120	$	1,282,411		L+1.83	%

(1) As of September 30, 2018, 98% of our loans financed by securitized debt obligations earned a floating rate of interest. As of December 31, 2017, 98% of our loans financed by securitized debt obligations earned a floating rate of interest. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, purchase discounts, and accrual of exit fees. All-in yield for the total portfolio assume applicable floating benchmark rates for weighted-average calculation.

(2) Loan term represents weighted-average final maturity, assuming all extension options are exercised by the borrower. Repayments of securitized debt obligations are tied to timing of the related collateral loan asset repayments. The term of these obligations represents the rated final distribution date of the securitizations.

(3) The collateral assets for the 2017 Single Asset Securitization include the total loan amount, of which we securitized $500.0 million.

(4) During the three and nine months ended September 30, 2018, we recorded $12.5 million and $35.6 million of interest expense, respectively, related to our securitized debt obligations. During both the three and nine months ended September 30, 2017, we recorded $3.8 million of interest expense related to our securitized debt obligations.

26

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

8. CONVERTIBLE NOTES, NET

As of September 30, 2018, the following convertible senior notes, or Convertible Notes, were outstanding ($ in thousands):

Convertible Notes Issuance	Face Value		Coupon Rate			All-in Cost(1)			Conversion Rate(2)		Maturity
November 2013	$	172,328		5.25	%		5.87	%		36.5472		December 1, 2018
May 2017		402,500		4.38	%		4.85	%		28.0324		May 5, 2022
March 2018		220,000		4.75	%		5.33	%		27.6052		March 15, 2023

(1)

Includes issuance costs that are amortized through interest expense over the life of the Convertible Notes using the effective interest method.

(2)

Represents the shares of class A common stock per $1,000 principal amount of Convertible Notes, which is equivalent to a conversion price of $27.36, $35.67, and $36.23 per share of class A common stock, respectively, for the November 2013, May 2017, and March 2018 convertible notes. As a result of exceeding the cumulative dividend threshold, as defined in the November 2013 convertible notes supplemental indenture, the conversion rate on the November 2013 convertible notes was most recently adjusted on March 28, 2018 from the prior conversion rate of 36.1380 shares of class A common stock per $1,000 principal amount of convertible notes, which was equivalent to a conversion price of $27.67 per share of class A common stock. Pursuant to the terms of the November 2013 supplemental indenture, the conversion rate will be adjusted to 36.8161 on the first day of any future observation period related to a conversion of the November 2013 convertible notes to account for the dividends paid on our class A common stock on July 16, 2018 and October 15, 2018. The cumulative dividend threshold as defined in the respective May 2017 and March 2018 convertible notes supplemental indentures have not been exceeded as of September 30, 2018.

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, January 31, 2022, and December 14, 2022 for the November 2013, May 2017, and March 2018 convertible notes, respectively, 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. We may not redeem the Convertible Notes prior to maturity. The last reported sale price of our class A common stock of $33.51 on September 28, 2018, the last trading day in the quarter ended September 30, 2018, was greater than the per share conversion price of the November 2013 convertible notes but less than the per share conversion price of the May 2017 and March 2018 convertible notes. We have the intent and ability to settle each series of the Convertible Notes in cash and, as a result, the Convertible Notes did not have any impact on our diluted earnings per share. During the nine months ended September 30, 2018, holders of $172,000 of our November 2013 convertible notes elected to convert their notes pursuant to the terms of the November 2013 convertible notes supplemental indenture. The conversions were settled entirely in cash.

Upon our issuance of the November 2013 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 November 2013 convertible notes issuance is 7.16% per annum.

Upon our issuance of the May 2017 convertible notes, we recorded a $979,000 discount based on the implied value of the conversion option and an assumed effective interest rate of 4.57%, as well as $8.4 million of initial debt discount and issuance costs. Including the amortization of the discount and issuance costs, our total cost of the May 2017 convertible notes issuance is 4.91% per annum.

Upon our issuance of the March 2018 convertible notes, we recorded a $1.5 million discount based on the implied value of the conversion option and an assumed effective interest rate of 5.25%, as well as $5.2 million of initial debt discount and issuance costs. Including the amortization of the discount and issuance costs, our total cost of the March 2018 convertible notes issuance is 5.49% per annum.

27

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following table details the net book value of our Convertible Notes on our consolidated balance sheets ($ in thousands):

	September 30, 2018			December 31, 2017
Face value	$	794,828		$	575,000
Unamortized discount		(12,956	)		(10,279	)
Deferred financing costs		(921	)		(810	)
Net book value	$	780,951		$	563,911

The following table details our interest expense related to the Convertible Notes ($ in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Cash coupon	$	9,277	$	6,247	$	25,333	$	12,732
Discount and issuance cost amortization		1,535		1,202		4,242		2,869
Total interest expense	$	10,812	$	7,449	$	29,575	$	15,601

Accrued interest payable for the Convertible Notes was $10.8 million and $3.7 million as of September 30, 2018, and December 31, 2017, respectively. Refer to Note 2 for additional discussion of our accounting policies for the Convertible Notes.

9. DERIVATIVE FINANCIAL INSTRUMENTS

The sole objective of our use of derivative financial instruments is to minimize the risks and/or costs associated with our investments and/or financing transactions. These derivatives may or may not qualify as net investment, cash flow, or fair value hedges under the hedge accounting requirements of ASC 815 – “Derivatives and Hedging.” Derivatives not designated as hedges are not speculative and are used to manage our exposure to interest rate movements and other identified risks. For more information on the accounting for designated and non-designated hedges, refer to Note 2.

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

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 foreign currency forward contracts to protect the value or fix the amount of certain investments or cash flows in terms of the U.S. dollar.

28

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following table details our outstanding foreign exchange derivatives that were designated as net investment hedges of foreign currency risk (notional amount in thousands):

September 30, 2018				December 31, 2017
Foreign Currency Derivatives	Number of Instruments	Notional Amount		Foreign Currency Derivatives	Number of Instruments	Notional Amount
Sell AUD Forward	3	A$	305,000	Sell GBP Forward	1	£	112,700
Sell EUR Forward	1	€	185,000	Sell CAD Forward	1	C$	95,100
Sell GBP Forward	1	£	79,100
Sell CAD Forward	1	C$	71,600

Cash Flow Hedges of Interest Rate Risk

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 following tables detail our outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (notional amount in thousands):

September 30, 2018
Interest Rate	Number of Instruments	Notional Amount		Strike	Index	Wtd.-Avg. Maturity (Years)
Interest Rate Swaps	4	C$	107,822	1.0%	CDOR	0.7
Interest Rate Caps	9	$	204,248	2.4%	USD LIBOR	0.7
Interest Rate Caps	3	C$	22,765	2.0%	CDOR	0.4
December 31, 2017
Interest Rate	Number of Instruments	Notional Amount		Strike	Index	Wtd.-Avg. Maturity (Years)
Interest Rate Swaps	4	C$	108,094	1.0%	CDOR	1.4
Interest Rate Caps	9	$	204,248	2.4%	USD LIBOR	1.5
Interest Rate Caps	3	C$	23,370	2.0%	CDOR	0.3

Amounts reported in accumulated other comprehensive income (loss) related to derivatives will be reclassified to interest expense as interest payments are made on our floating rate debt. During the twelve months following September 30, 2018, we estimate that an additional $570,000 will be reclassified from accumulated other comprehensive income (loss) as an increase to interest income.

Non-designated Hedges

During the three and nine months ended September 30, 2018, we recorded losses of $51,000 and gains of $94,000, respectively, related to non-designated hedges that were reported as a component of interest expense in our consolidated financial statements. During the three and nine months ended September 30, 2017, we recorded losses of $42,000 and $355,000, respectively.

29

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following tables summarize our non-designated hedges (notional amount in thousands):

September 30, 2018
Non-designated Hedges	Number of Instruments	Notional Amount
Buy GBP / Sell EUR Forward	1	€	12,857
December 31, 2017
Non-designated Hedges	Number of Instruments	Notional Amount
Buy GBP / Sell EUR Forward	1	€	12,857

Valuation of Derivative Instruments

The following table summarizes the fair value of our derivative financial instruments ($ in thousands):

	Fair Value of Derivatives in an Asset Position(1) as of				Fair Value of Derivatives in a Liability Position(2) as of
	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Derivatives designated as hedging instruments:
Foreign exchange contracts	$	1,514	$	—	$	3,676	$	4,872
Interest rate derivatives		1,042		1,214		—		—
Total	$	2,556	$	1,214	$	3,676	$	4,872
Derivatives not designated as hedging instruments:
Foreign exchange contracts	$	163	$	—	$	—	$	39
Interest rate derivatives		—		—		—		—
Total	$	163	$	—	$	—	$	39
Total Derivatives	$	2,719	$	1,214	$	3,676	$	4,911

(1)	Included in other assets in our consolidated balance sheets.
(2)	Included in other liabilities in our consolidated balance sheets.

30

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following table presents the effect of our derivative financial instruments on our consolidated statements of operations ($ in thousands):

	Amount of Gain (Loss) Recognized in OCI on Derivatives				Location of			Amount of Gain (Loss) Reclassified from Accumulated OCI into Income
Derivatives in Hedging Relationships	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018		Gain (Loss) Reclassified from Accumulated OCI into Income			Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
Net Investment Hedges
Foreign exchange contracts(1)	$	1,763	$	23,782		Interest Expense		$	—	$	—
Cash Flow Hedges
Interest rate derivatives		92		228		Interest Expense	(2)		152		388
Total	$	1,855	$	24,011				$	152	$	388

(1)

During the three and nine months ended September 30, 2018, we received net cash settlements of $7.6 million and $21.0 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.

(2)

During the three months ended September 30, 2018, we recorded total interest and related expenses of $98.0 million, which included a $152,000 expense reduction related to income generated by our cash flow hedges. During the nine months ended September 30, 2018, we recorded total interest and related expenses of $255.7 million, which included a $388,000 expense reduction related to income generated by our cash flow hedges.

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 September 30, 2018, we were in a net asset position with one of our derivative counterparties and in a net liability position with our other derivative counterparty, and posted collateral of $7.4 million under these derivative contracts. As of December 31, 2017, we were in a net asset position with one of our derivative counterparties and in a net liability position with our other derivative counterparty, and posted collateral of $4.1 million under these derivative contracts.

10. EQUITY

Stock and Stock Equivalents

Authorized Capital

As of September 30, 2018, 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 September 30, 2018.

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Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

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.

The following table details our issuance of class A common stock during the nine months ended September 30, 2018 ($ in thousands, except share and per share data):

	Class A Common Stock Offerings				2018 Total / Wtd. Avg.
	August 2018		At-the-Market  2018(1)
Shares issued		6,900,000		4,583,135		11,483,135
Share issue price(2)	$	32.60	$	32.73	$	32.65
Net proceeds(3)	$	222,275	$	147,512	$	369,787

(1)	Issuance represents shares issued under our at-the-market program, with a weighted-average issue price of $32.73.
(2)	Represents price per share paid by the underwriters or sales agents, as applicable. Net proceeds after underwriting or sales discounts and commissions were $32.26 and $32.24 per share for our August offering and at-the-market program, respectively.
(3)	Net proceeds represents proceeds received from the underwriters less applicable transaction costs.

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:

	Nine Months Ended September 30,
Common Stock Outstanding(1)	2018		2017
Beginning balance		108,081,077		94,709,290
Issuance of class A common stock(2)		11,484,414		971
Issuance of restricted class A common stock, net		300,921		286,773
Issuance of deferred stock units		23,730		20,560
Ending balance		119,890,142		95,017,594

(1)	Includes deferred stock units held by members of our board of directors of 220,947 and 189,587 as of September 30, 2018 and 2017, respectively.
(2)	Includes 1,279 and 971 shares issued under our dividend reinvestment program during the nine months ended September 30, 2018 and 2017, 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 and nine months ended September 30, 2018, we issued 403 shares and 1,279 shares, respectively, of class A common stock under the dividend reinvestment component of the plan compared to 428 shares and 971 shares for the same periods in 2017. As of September 30, 2018, a total of 9,995,647 shares of class A common stock remained available for issuance under the dividend reinvestment and direct stock purchase plan.

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Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

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. On July 29, 2016, in connection with filing a new universal shelf registration statement on Form S-3, we entered into amendments to each of the ATM Agreements. 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. During the nine months ended September 30, 2018, we issued and sold 4,583,135 shares of class A common stock under the ATM Agreements, with net proceeds totaling $147.5 million. We did not sell any shares of our class A common stock under the ATM Agreements during the nine months ended September 30, 2017. As of September 30, 2018, sales of our class A common stock with an aggregate sales price of $38.6 million remained 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 September 14, 2018, we declared a dividend of $0.62 per share, or $74.2 million, that was paid on October 15, 2018, to stockholders of record as of September 28, 2018. The following table details our dividend activity ($ in thousands, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Dividends declared per share of common stock	$	0.62	$	0.62	$	1.86	$	1.86
Total dividends declared	$	74,195	$	58,793	$	210,369	$	176,374

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				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Net income(1)	$	78,165	$	57,722	$	211,436	$	159,741
Weighted-average shares outstanding, basic and diluted		116,203,140		95,013,087		111,251,864		95,004,188
Per share amount, basic and diluted	$	0.67	$	0.61	$	1.90	$	1.68

(1)   Represents net income attributable to Blackstone Mortgage Trust, Inc.

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Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

Other Balance Sheet Items

Accumulated Other Comprehensive Loss

As of September 30, 2018, total accumulated other comprehensive loss was $32.8 million, primarily representing (i) $87.1 million of cumulative unrealized currency translation adjustments on assets and liabilities denominated in foreign currencies and (ii) an offsetting $54.3 million of net realized and unrealized gains related to changes in the fair value of derivative instruments. As of December 31, 2017, total accumulated other comprehensive loss was $29.7 million, primarily representing (i) $60.3 million of cumulative unrealized currency translation adjustments on assets and liabilities denominated in foreign currencies and (ii) an offsetting $30.6 million of net realized and unrealized gains 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 our Multifamily Joint Venture that are not owned by us. A portion of our Multifamily Joint Venture’s consolidated equity and results of operations are allocated to these non-controlling interests based on their pro rata ownership of our Multifamily Joint Venture. As of September 30, 2018, our Multifamily Joint Venture’s total equity was $48.1 million, of which $40.9 million was owned by us, and $7.2 million was allocated to non-controlling interests. As of December 31, 2017, our Multifamily Joint Venture’s total equity was $42.3 million, of which $36.0 million was owned by us, and $6.3 million was allocated to non-controlling interests.

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 a management agreement between our Manager and us, or 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 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 and nine months ended September 30, 2018, we incurred $12.1 million and $34.2 million, respectively, of management fees payable to our Manager, compared to $9.5 million and $28.6 million during the same periods in 2017. In addition, during the three and nine months ended September 30, 2018, we incurred $6.3 million and $22.0 million, respectively, of incentive fees payable to our Manager, compared to $3.7 million and $11.9 million during the same periods in 2017.

As of September 30, 2018 and December 31, 2017 we had accrued management and incentive fees payable to our Manager of $18.4 million and $14.3 million, respectively.

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Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

General and Administrative Expenses

General and administrative expenses consisted of the following ($ in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Professional services(1)	$	1,022	$	933	$	3,383	$	2,811
Operating and other costs(1)		687		489		2,026		1,424
Subtotal		1,709		1,422		5,409		4,235
Non-cash compensation expenses
Restricted class A common stock earned		6,609		5,819		20,113		17,496
Director stock-based compensation		125		125		375		313
Subtotal		6,734		5,944		20,488		17,809
Total BXMT expenses		8,443		7,366		25,897		22,044
Other expenses		—		53		—		175
Total general and administrative expenses	$	8,443	$	7,419	$	25,897	$	22,219

(1)   During the three and nine months ended September 30, 2018, we recognized an aggregate $77,000 and $302,000, respectively, of expenses related to our Multifamily Joint Venture. During both the three and nine months ended September 30, 2017, we recognized an aggregate $112,000 of expenses related to our Multifamily venture.

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 September 30, 2018 and December 31, 2017, we were in compliance with all REIT requirements.

Securitization transactions could result in the creation of taxable mortgage pools for federal income tax purposes. As a REIT, so long as we own 100% of the equity interests in a taxable mortgage pool, we generally would not be adversely affected by the characterization of the securitization as a taxable mortgage pool. Certain categories of stockholders, however, such as foreign stockholders eligible for treaty or other benefits, stockholders with net operating losses, and certain tax-exempt stockholders that are subject to unrelated business income tax, or UBTI, could be subject to increased taxes on a portion of their dividend income from us that is attributable to the taxable mortgage pool. We currently own no UBTI producing assets and we do not intend to purchase or generate assets that produce UBTI distributions in the future.

During the three and nine months ended September 30, 2018, we recorded a current income tax provision of $48,000 and $272,000, respectively, primarily related to activities of our taxable REIT subsidiaries and various state and local taxes. During the three and nine months ended September 30, 2017, we recorded a current income tax provision of $83,000 and $265,000, respectively. We did not have any deferred tax assets or liabilities as of September 30, 2018 or December 31, 2017.

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Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

Effective January 1, 2018, under legislation from the Tax Cuts and Jobs Act of 2017, the maximum U.S. federal corporate income tax rate was reduced from 35% to 21%. Accordingly, to the extent that the activities of our taxable REIT subsidiaries generate taxable income in future periods, they may be subject to lower U.S. federal income tax rates.

We have net operating losses, or NOLs, generated by our predecessor business that may be carried forward and utilized in current or future periods. As a result of our issuance of 25,875,000 shares of class A common stock in May 2013, the availability of our NOLs 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, 2017, we had estimated NOLs of $159.0 million that will expire in 2029, unless they are utilized by us prior to expiration.

As of September 30, 2018, tax years 2015 through 2017 remain subject to examination by taxing authorities.

13. STOCK-BASED INCENTIVE PLANS

We are externally managed by our Manager and do not currently have any employees. However, as of September 30, 2018, 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 or available to be awarded under nine benefit plans as of September 30, 2018: (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; (v) our 2013 manager incentive plan, or 2013 Manager Plan; (vi) our 2016 stock incentive plan, or 2016 Plan; (vii) our 2016 manager incentive plan, or 2016 Manager Plan; (viii) our 2018 stock incentive plan, or 2018 Plan; and (ix) our 2018 manager incentive plan, or 2018 Manager Plan. We refer to our 1997 Plan, our 2007 Plan, our 2011 Plan, our 2013 Plan, our 2013 Manager Plan, our 2016 Plan, and our 2016 Manager Plan, collectively, as our Expired Plans and we refer to our 2018 Plan and 2018 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 5,000,000 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 September 30, 2018, we have not granted any shares 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 Common Stock			Weighted-Average Grant Date Fair Value Per Share
Balance as of December 31, 2017		1,484,175		$	30.61
Granted		318,741			31.83
Vested		(404,241	)		28.89
Forfeited		(17,820	)		30.44
Balance as of September 30, 2018		1,380,855		$	31.40

These shares generally vest in installments over a three-year period, pursuant to the terms of the respective award agreements and the terms of the Current Plans. The 1,380,855 shares of restricted class A common stock outstanding as of September 30, 2018 will vest as follows: 448,474 shares will vest in 2018; 616,168 shares will vest in 2019; and 316,213 shares will vest in 2020. As of September 30, 2018, total unrecognized compensation cost relating to nonvested share-based compensation arrangements was $33.9 million based on the closing price of our class A common stock of $31.43 on June 29, 2018, the last trading day prior to our adoption of ASU 2018-07. This cost is expected to be recognized over a weighted average period of 1.0 years from September 30, 2018.

36

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The compensation cost of our share-based compensation arrangements for awards granted after our adoption of ASU 2018-07 will be a fixed amount determined based on the grant date fair value of shares granted. Refer to Note 2 for additional discussion on our adoption of ASU 2018-07.

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):

	September 30, 2018								December 31, 2017
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Derivatives	$	—	$	2,719	$	—	$	2,719	$	—	$	1,214	$	—	$	1,214
Liabilities
Derivatives	$	—	$	3,676	$	—	$	3,676	$	—	$	4,911	$	—	$	4,911

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.

37

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following table details the book value, face amount, and fair value of the financial instruments described in Note 2 ($ in thousands):

	September 30, 2018						December 31, 2017
	Book		Face		Fair		Book		Face		Fair
	Value		Amount		Value		Value		Amount		Value
Financial assets
Cash and cash equivalents	$	86,987	$	86,987	$	86,987	$	69,654	$	69,654	$	69,654
Restricted cash		—		—		—		32,864		32,864		32,864
Loans receivable, net		12,176,516		12,260,103		12,261,013		10,056,732		10,108,226		10,112,331
Debt securities held-to-maturity(1)		96,050		99,000		97,607		—		—		—
Financial liabilities
Secured debt agreements, net		6,841,759		6,862,256		6,862,256		5,273,855		5,290,536		5,290,536
Loan participations sold, net		81,044		81,170		81,170		80,415		80,706		80,706
Securitized debt obligations, net		1,284,362		1,292,120		1,297,032		1,282,412		1,292,120		1,292,589
Convertible notes, net		780,951		794,828		832,407		563,911		575,000		610,201

(1)   Included in other assets on our consolidated balance sheets.

Estimates of fair value for cash and cash equivalents, restricted cash, and convertible notes are measured using observable, quoted market prices, or Level 1 inputs. Estimates of fair value for debt securities held-to-maturity and securitized debt obligations are measured using observable, quoted market prices, in inactive markets, or Level 2 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.

15. VARIABLE INTEREST ENTITIES

Consolidated Variable Interest Entities

We have financed a portion of our loans through the CLO and the 2017 Single Asset Securitization, both of which are VIEs. We are the primary beneficiary and consolidate the CLO and the 2017 Single Asset Securitization on our balance sheet as we (i) control the relevant interests of the CLO and the 2017 Single Asset Securitization that give us power to direct the activities that most significantly affect the CLO and the 2017 Single Asset Securitization, and (ii) have the right to receive benefits and obligation to absorb losses of the CLO and the 2017 Single Asset Securitization through the subordinate interests we own.

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Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

The following table details the assets and liabilities of our consolidated CLO and 2017 Single Asset Securitization VIEs ($ in thousands):

	September 30, 2018		December 31, 2017
Assets:
Loans receivable, net	$	1,500,000	$	1,500,000
Other assets		4,899		2,407
Total assets	$	1,504,899	$	1,502,407
Liabilities:
Securitized debt obligations, net	$	1,284,362	$	1,282,412
Other liabilities		1,869		1,379
Total liabilities	$	1,286,231	$	1,283,791

Assets held by these VIEs are restricted and can be used only to settle obligations of the VIEs, including the subordinate interests owned by us. The liabilities of these VIEs are non-recourse to us and can only be satisfied from the assets of the VIEs. The consolidation of these VIEs results in an increase in our gross assets, liabilities, interest income and interest expense, however it does not affect our stockholders’ equity or net income.

Non-Consolidated Variable Interest Entities

In the third quarter of 2018, we contributed a $517.5 million loan to the $1.0 billion 2018 Single Asset Securitization, which is a VIE, and invested in the related $99.0 million subordinate risk retention position. We are not the primary beneficiary of the VIE because we do not have the power to direct the activities that most significantly affect the VIE’s economic performance and, therefore, do not consolidate the 2018 Single Asset Securitization on our balance sheet. We have classified the subordinate risk retention position as a held-to-maturity debt security that is included in other assets on our consolidated balance sheets. We are not obligated to provide, have not provided, and do not intend to provide, financial support to the 2018 Single Asset Securitization, and therefore, our maximum exposure to loss is limited to our book value of $96.1 million. Refer to Note 16 for further details of this transaction.

We are not obligated to provide, have not provided, and do not intend to provide financial support to these consolidated and non-consolidated VIEs.

16. TRANSACTIONS WITH RELATED PARTIES

We are managed by our Manager pursuant to the Management Agreement, the current term of which expires on December 19, 2018, and will be automatically renewed for a one-year term upon such date and each anniversary thereafter unless earlier terminated.

As of September 30, 2018 and December 31, 2017, our consolidated balance sheet included $18.4 million and $14.3 million of accrued management and incentive fees payable to our Manager, respectively. During the three and nine months ended September 30, 2018, we paid management and incentive fees of $22.4 million and $52.2 million, respectively, to our Manager, compared to $14.4 million and $40.1 million during the same periods of 2017. In addition, during the three and nine months ended September 30, 2018, we reimbursed our Manager for expenses incurred on our behalf of $167,000 and $572,000, respectively, compared to $59,000 and $325,000 during the same periods of 2017.

As of September 30, 2018, our Manager held 675,333 shares of unvested restricted class A common stock, which had an aggregate grant date fair value of $21.2 million, and vest in installments over three years from the date of issuance. During the three and nine months ended September 30, 2018, we recorded non-cash expenses related to shares held by our Manager of $3.2 million and $9.6 million, respectively, compared to $2.9 million and $8.7 million during the same periods of 2017. We did not issue any shares of restricted class A common stock to our Manager during the nine months ended September 30, 2018 or 2017, respectively. Refer to Note 13 for further details on our restricted class A common stock.

An affiliate of our Manager is the special servicer of the CLO. This affiliate did not earn any special servicing fees related to the CLO during the nine months ended September 30, 2018 or 2017.

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Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

In March of 2018, we originated €1.0 billion of a total €7.3 billion senior term facility, or the Senior Term Facility, for the acquisition of a portfolio of Spanish real estate assets and a Spanish real estate management and loan servicing company by a joint venture between Banco Santander S.A. and certain Blackstone-advised investment vehicles. These investment vehicles own 51% of the joint venture, and we will forgo all non-economic rights under the Senior Term Facility, including voting rights, so long as Blackstone-advised investment vehicles control the joint venture. The Senior Term Facility was negotiated by the joint venture with third-party investment banks without our involvement, and our 14% interest in the Senior Term Facility was made on such market terms.

In the first quarter of 2018, we originated a $330.0 million senior loan, the proceeds of which were used by the borrower to repay an existing loan owned by a Blackstone-advised investment vehicle.

In the second quarter of 2018, we acquired from an unaffiliated third-party a 50% interest in a $1.0 billion senior loan to a borrower that is partially owned by a Blackstone-advised investment vehicle. In the third quarter of 2018, we contributed this loan to the 2018 Single Asset Securitization and invested in the related subordinate risk retention position. We will forgo all non-economic rights under the loan, including voting rights, so long as Blackstone-advised investment vehicles own the borrower above a certain threshold. Refer to Note 15 for further details on this transaction.

During the nine months ended September 30, 2018 and 2017, we originated three loans and five loans, respectively, whereby each respective borrower engaged an affiliate of our Manager to act as title insurance agent in connection with each transaction. We did not incur any expenses or receive any revenues as a result of these transactions.

During the three and nine months ended September 30, 2018, we incurred $90,000 and $384,000, respectively, of expenses for various administrative, compliance, and capital market data services to third-party service providers that are affiliates of our Manager, compared to $87,000 and $254,000 during the same periods of 2017.

In July 2018, in a fully subscribed offering totaling $1.0 billion, certain Blackstone-advised investment vehicles purchased, in the aggregate, $116.1 million of securitized debt obligations issued by the 2018 Single Asset Securitization. In June 2017, in a fully subscribed offering totaling $474.6 million, certain Blackstone-advised investment vehicles purchased, in the aggregate, $72.9 million of securitized debt obligations issued by the 2017 Single Asset Securitization. These investments by the Blackstone-advised investment vehicles represented minority participations in any individual tranche and were purchased by the Blackstone-advised investment vehicles from third-party investment banks on market terms negotiated by the majority third-party investors.

17. COMMITMENTS AND CONTINGENCIES

Unfunded Commitments Under Loans Receivable

As of September 30, 2018, we had unfunded commitments of $3.0 billion related to 80 loans receivable, which amounts will generally be funded to finance our borrowers’ construction or development of real estate-related assets, capital improvements of existing assets, or lease-related expenditures. These commitments will generally be funded over the term of each loan, subject in certain cases to an expiration date.

40

Blackstone Mortgage Trust, Inc.

Notes to Consolidated Financial Statements (continued)

(Unaudited)

Principal Debt Repayments

Our contractual principal debt repayments as of September 30, 2018 were as follows ($ in thousands):

			Payment Timing
	Total Obligation		Less Than 1 Year		1 to 3 Years		3 to 5 Years		More Than 5 Years
Principal repayments under secured debt agreements(1)	$	6,862,256	$	273,254	$	2,393,008	$	4,112,794	$	83,200
Principal repayments of convertible notes(2)		794,828		172,328		—		622,500		—
Total(3)	$	7,657,084	$	445,582	$	2,393,008	$	4,735,294	$	83,200

(1)	The allocation of repayments under our secured debt agreements is based on the earlier of (i) the maturity date of each facility, or (ii) the maximum maturity date of the collateral loans, assuming all extension options are exercised by the borrower.
(2)	Reflects the outstanding principal balance of convertible notes, excluding any potential conversion premium. Refer to Note 8 for further details on our convertible notes.
(3)	As of September 30, 2018, the total does not include $81.2 million of loan participations sold, $466.7 million of non-consolidated senior interests, and $1.3 billion of securitized debt obligations, as the satisfaction of these liabilities will not require cash outlays from us.

Litigation

From time to time, we may be involved in various claims and legal actions arising in the ordinary course of business. As of September 30, 2018, we were not involved in any material legal proceedings.

Board of Directors’ Compensation

As of September 30, 2018, of the eight members of our board of directors, our five independent directors are entitled to annual compensation of $175,000 each, $75,000 of which will be paid in the form of cash and $100,000 in the form of deferred stock units. The other three board members, including our chairman and our chief executive officer, serve as directors with no compensation. In addition, (i) the chair of our audit committee receives additional annual cash compensation of $20,000, (ii) the other members of our audit committee receive additional annual cash compensation of $10,000, and (iii) the chairs of each of our compensation and corporate governance committees receive additional annual cash compensation of $10,000.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

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.

The following discussion should be read in conjunction with the unaudited consolidated financial statements and notes thereto appearing elsewhere in this quarterly report on Form 10-Q. In addition to historical data, this discussion contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which reflect our current views with respect to, among other things, our business, operations and financial performance. You can identify these forward-looking statements by the use of words such as “intend,” “goal,” “estimate,” “expect,” “project,” “projections,” “plans,” “seeks,” “anticipates,” “should,” “could,” “may,” “designed to,” “foreseeable future,” “believe,” “scheduled,” and similar expressions. Such forward-looking statements are subject to various risks, uncertainties and assumptions. Our actual results or outcomes may differ materially from those in this discussion as a result of various factors, including but not limited to those discussed in Item 1A. Risk Factors in our annual report on Form 10-K for the year ended December 31, 2017 and elsewhere in this quarterly report on Form 10-Q.

Introduction

Blackstone Mortgage Trust is a real estate finance company that originates senior loans collateralized by commercial real estate in North America, Europe, and Australia. Our investment objective is to preserve and protect shareholder capital while producing attractive risk-adjusted returns primarily through dividends generated from current income from our loan portfolio. 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 an 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.

I. Key Financial Measures and Indicators

As a real estate finance company, we believe the key financial measures and indicators for our business are earnings per share, dividends declared, Core Earnings, and book value per share. For the three months ended September 30, 2018 we recorded earnings per share of $0.67, declared a dividend of $0.62 per share, and reported $0.75 per share of Core Earnings. In addition, our book value per share as of September 30, 2018 was $27.53. As further described below, Core Earnings is a measure that is not prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP. We use Core Earnings to evaluate our performance excluding the effects of certain transactions and GAAP adjustments that we believe are not necessarily indicative of our current loan activity and operations.

Earnings Per Share and Dividends Declared

The following table sets forth the calculation of basic and diluted net income per share and dividends declared per share ($ in thousands, except per share data):

	Three Months Ended
	September 30, 2018		June 30, 2018
Net income (1)	$	78,165	$	72,312
Weighted-average shares outstanding, basic and diluted		116,203,140		109,069,078
Net income per share, basic and diluted	$	0.67	$	0.66
Dividends declared per share	$	0.62	$	0.62

(1) Represents net income attributable to Blackstone Mortgage Trust, Inc.

42

Core Earnings

Core Earnings is a non-GAAP measure, which we define as GAAP net income (loss), including realized gains and losses not otherwise included in GAAP net income (loss), and excluding (i) net income (loss) attributable to our CT Legacy Portfolio, (ii) non-cash equity compensation expense, (iii) depreciation and amortization, (iv) unrealized gains (losses), and (v) certain non-cash items. Core Earnings may also be adjusted from time to time to exclude one-time events pursuant to changes in GAAP and certain other non-cash charges as determined by our Manager, subject to approval by a majority of our independent directors.

We believe that Core Earnings provides meaningful information to consider in addition to our net income and cash flow from operating activities determined in accordance with GAAP. This adjusted measure helps us to evaluate our performance excluding the effects of certain transactions and GAAP adjustments that we believe are not necessarily indicative of our current loan portfolio and operations. Although, according to the management agreement between our Manager and us, or our Management Agreement, we calculate the incentive and base management fees due to our Manager using Core Earnings before incentive fees expense, we report Core Earnings after incentive fee expense, as we believe this is a more meaningful presentation of the economic performance of our class A common stock.

Core Earnings does not represent net income or cash generated from operating activities and should not be considered as an alternative to GAAP net income, or an indication of our GAAP cash flows from operations, a measure of our liquidity, or an indication of funds available for our cash needs. In addition, our methodology for calculating Core Earnings may differ from the methodologies employed by other companies to calculate the same or similar supplemental performance measures, and accordingly, our reported Core Earnings may not be comparable to the Core Earnings reported by other companies.

The following table provides a reconciliation of Core Earnings to GAAP net income ($ in thousands, except per share data):

	Three Months Ended
	September 30, 2018		June 30, 2018
Net income(1)	$	78,165	$	72,312
GE purchase discount accretion adjustment(2)		—		8,723
Non-cash compensation expense		6,734		6,778
Realized foreign currency gain, net(3)		1,930		1,998
Other items		590		565
Core Earnings	$	87,419	$	90,376
Weighted-average shares outstanding, basic and diluted		116,203,140		109,069,078
Core Earnings per share, basic and diluted	$	0.75	$	0.83

(1)	Represents net income attributable to Blackstone Mortgage Trust.
(2)	Historically, we have deferred in Core Earnings the accretion of purchase discount attributable to a certain pool of GE portfolio loans acquired in May 2015, until repayment in full of the remaining loans in the pool was substantially assured. During the three months ended June 30, 2018, it was determined that repayment of the remaining loans in the deferral pool was substantially assured. As such, the $8.7 million of deferred purchase discount, which has been previously recognized in GAAP net income, was realized in Core Earnings during the three months ended June 30, 2018.
(3)	Primarily represents the forward points earned on our foreign currency forward contracts, which reflect the interest rate differentials between the applicable base rate for our foreign currency investments and USD LIBOR. These forward contracts effectively convert the rate exposure to USD LIBOR, resulting in additional interest income earned in U.S. dollar terms. These amounts are not included in GAAP net income, but rather as a component of Other Comprehensive Income in our consolidated financial statements.

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Book Value Per Share

The following table calculates our book value per share ($ in thousands, except per share data):

	September 30, 2018		June 30, 2018
Stockholders’ equity	$	3,300,772	$	3,023,480
Shares
Class A common stock		119,669,195		111,441,888
Deferred stock units		220,947		213,136
Total outstanding		119,890,142		111,655,024
Book value per share	$	27.53	$	27.08

II. Loan Portfolio

During the quarter ended September 30, 2018, we originated $1.4 billion of loans. Loan fundings during the quarter totaled $1.0 billion and repayments totaled $556.9 million. We generated interest income of $203.1 million and incurred interest expense of $98.0 million during the quarter, which resulted in $105.2 million of net interest income during the three months ended September 30, 2018.

Portfolio Overview

The following table details our loan origination activity ($ in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2018			September 30, 2018
Loan originations(1)	$	1,399,791		$	7,203,290
Loan fundings(2)	$	1,022,768		$	5,232,907
Loan repayments(3)		(556,856	)		(2,967,013	)
Total net fundings	$	465,912		$	2,265,894

(1)	Includes new loan originations and additional commitments made under existing loans.
(2)	Loan fundings during the nine months ended September 30, 2018 include $10.1 million of additional fundings under related non-consolidated senior interests. There were no additional fundings during the three months ended September 30, 2018 related to non-consolidated senior interests.
(3)	Loan repayments during the three and nine months ended September 30, 2018 include $17.3 million and $514.2 million, respectively, of additional repayments or reduction of loan exposure under related non-consolidated senior interests.

44

The following table details overall statistics for our investment portfolio as of September 30, 2018 ($ in thousands):

				Total Investment Exposure
	Balance Sheet Portfolio(1)			Loan Exposure(1)(2)			Other Investments(3)			Total Investment Portfolio
Number of investments		112			112			1			113
Principal balance	$	12,260,103		$	12,726,831		$	1,035,000		$	13,761,831
Net book value	$	12,176,516		$	12,176,516		$	96,050		$	12,272,566
Unfunded loan commitments(4)	$	3,046,350		$	3,117,000		$	—		$	3,117,000
Weighted-average cash coupon(5)		5.61	%		5.52	%		L + 2.75	%		5.48	%
Weighted-average all-in yield(5)		5.94	%		5.89	%		L + 2.99	%		5.84	%
Weighted-average maximum maturity (years)(6)		3.8			3.8			6.7			4.0
Loan to value (LTV)(7)		63.1	%		63.3	%		42.6	%		61.8	%

(1)	Excludes investment exposure to the $99.0 million subordinate risk retention interest we own in the $1.0 billion 2018 Single Asset Securitization. Refer to Notes 4 and 15 to our consolidated financial statements for further discussion of the 2018 Single Asset Securitization.
(2)	In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. Total loan exposure encompasses the entire loan we originated and financed, including $466.7 million of such non-consolidated senior interests that are not included in our balance sheet portfolio.
(3)	Includes investment exposure to the $1.0 billion 2018 Single Asset Securitization. We do not consolidate the 2018 Single Asset Securitization on our consolidated financial statements, and instead reflect our $99.0 million subordinate risk retention investment as a component of other assets on our consolidated balance sheet. Refer to Notes 4 and 15 to our consolidated financial statements for further discussion of the 2018 Single Asset Securitization.
(4)	Unfunded commitments will primarily be funded to finance our borrowers’ construction or development of real estate-related assets, capital improvements of existing assets, or lease-related expenditures. These commitments will generally be funded over the term of each loan, subject in certain cases to an expiration date.
(5)	As of September 30, 2018, 95% of our loans by total loan exposure earned a floating rate of interest, primarily indexed to USD LIBOR, and 5% earned a fixed rate of interest. Cash coupon and all-in yield assume applicable floating benchmark rates as of September 30, 2018 for weighted-average calculation. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, and purchase discounts, as well as the accrual of exit fees.
(6)	Maximum maturity assumes all extension options are exercised by the borrower, however our loans and other investments may be repaid prior to such date. As of September 30, 2018, 87% of our loans and other investments were subject to yield maintenance or other prepayment restrictions and 13% were open to repayment by the borrower without penalty.
(7)	Based on LTV as of the dates loans and other investments were originated or acquired by us.

The charts below detail the geographic distribution and types of properties securing our investment portfolio, as of September 30, 2018:

Refer to section VI of this Item 2 for details of our loan portfolio, on a loan-by-loan basis.

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Asset Management

We actively manage the investments in our loan portfolio and exercise the rights afforded to us as a lender, including collateral level budget approvals, lease approvals, loan covenant enforcement, escrow/reserve management, collateral release approvals and other rights that we may negotiate.

As discussed in Note 2 to our consolidated financial statements, our Manager performs a quarterly review of our loan portfolio, assesses the performance of each loan, and assigns it a risk rating between “1” and “5,” from less risk to greater risk. The following table allocates the principal balance and total loan exposure balances based on our internal risk ratings ($ in thousands):

	September 30, 2018
Risk Rating	Number of Loans	Net Book Value		Total Loan Exposure(1)(2)
1	1	$	53,849	$	53,873
2	43		4,167,871		4,272,068
3	68		7,954,796		8,400,890
4	—		—		—
5	—		—		—
	112	$	12,176,516	$	12,726,831
(1)   In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 to our consolidated financial statements for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $466.7 million of such non-consolidated senior interests as of September 30, 2018.
(2)   Excludes investment exposure to the $1.0 billion 2018 Single Asset Securitization. Refer to Notes 4 and 15 to our consolidated financial statements for details of the subordinated risk retention interest we own in the 2018 Single Asset Securitization.

The weighted-average risk rating of our total loan exposure was 2.7 as of both September 30, 2018 and December 31, 2017.

Multifamily Joint Venture

As of September 30, 2018, our Walker & Dunlop Multifamily Joint Venture held $222.7 million of loans, which are included in the loan disclosures above. Refer to Note 2 to our consolidated financial statements for additional discussion of our Multifamily Joint Venture.

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Portfolio Financing

Our portfolio financing arrangements include credit facilities, the GE portfolio acquisition facility, asset-specific financings, a revolving credit agreement, loan participations sold, non-consolidated senior interests, and securitized debt obligations.

The following table details our portfolio financing ($ in thousands):

	Portfolio Financing
	Outstanding Principal Balance
	September 30, 2018		December 31, 2017
Credit facilities	$	4,850,911	$	4,068,249
Asset-specific financings		1,499,286		518,864
GE portfolio acquisition facility		512,059		703,423
Revolving credit agreement		—		—
Loan participations sold		81,170		80,706
Non-consolidated senior interests		466,728		985,382
Securitized debt obligations		1,292,120		1,292,120
Total portfolio financing	$	8,702,274	$	7,648,744

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Credit Facilities

The following table details our credit facilities ($ in thousands):

	September 30, 2018
	Maximum		Credit Borrowings						Collateral
Lender	Facility Size(1)		Potential(2)		Outstanding		Available(2)		Assets(3)
Bank of America	$	1,000,000	$	863,592	$	863,592	$	—	$	1,091,860
Wells Fargo		2,000,000		1,160,678		850,687		309,991		1,577,251
MetLife		1,000,000		737,770		737,770		—		946,933
Barclays		1,000,000		617,360		617,360		—		771,700
Citibank		750,000		576,369		480,129		96,240		730,723
JP Morgan		500,000		435,095		332,909		102,186		564,070
Morgan Stanley(4)		651,550		329,256		278,770		50,486		461,760
Deutsche Bank		500,000		277,247		277,247		—		380,986
Société Générale(5)		464,160		235,229		235,229		—		298,951
Goldman Sachs - Multi. JV(6)		250,000		117,498		117,498		—		148,099
Bank of America - Multi. JV(6)		200,000		59,720		59,720		—		74,650
	$	8,315,710	$	5,409,814	$	4,850,911	$	558,903	$	7,046,983

(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)	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 credit facility.
(3)	Represents the principal balance of the collateral assets.
(4)	As of September 30, 2018, the Morgan Stanley maximum facility size was £500.0 million, which translated to $651.6 million as of such date.
(5)	As of September 30, 2018, the Société Générale maximum facility size was €400.0 million, which translated to $464.2 million as of such date.
(6)	These facilities finance the loan investments of our consolidated Multifamily Joint Venture. Refer to Note 2 to our consolidated financial statements for additional discussion of our Multifamily Joint Venture.

The weighted-average outstanding balance of our credit facilities was $4.4 billion for the nine months ended September 30, 2018. As of September 30, 2018, we had aggregate borrowings of $4.9 billion outstanding under our credit facilities, with a weighted-average cash coupon of LIBOR plus 1.77% per annum, a weighted-average all-in cost of credit, including associated fees and expenses, of LIBOR plus 1.98% per annum, and a weighted-average advance rate of 79.2%. As of September 30, 2018, outstanding borrowings under these facilities had a weighted-average maturity, excluding extension options and term-out provisions, of 1.5 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.

48

Asset-Specific Financings

The following tables detail our asset-specific financings ($ in thousands):

	September 30, 2018
		Principal		Book		Wtd. Avg.					Wtd. Avg.
Asset-Specific Financings	Count	Balance		Value		Yield/Cost(1)			Guarantee(2)		Term(3)
Collateral assets	5	$	1,905,475	$	1,895,094		L+3.61	%		n/a		Sep. 2022
Financing provided(4)	5	$	1,499,286	$	1,492,614		L+1.77	%	$	1,178,874		Sep. 2022

(1)	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, yield/cost includes the amortization of deferred origination fees / financing costs.
(2)	Other than amounts guaranteed on an asset-by-asset basis, borrowings under our asset-specific financings are non-recourse to us.
(3)	The weighted-average term is determined based on the maximum maturity of the corresponding loans, assuming all extension options are exercised by the borrower. Each of our asset-specific financings are term-matched to the corresponding collateral loans.
(4)	Borrowings of $517.8 million under these asset specific financings are cross collateralized with related credit facilities with the same lenders.

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. The GE portfolio acquisition facility is non-revolving and consists of a single master repurchase agreement providing for asset-specific borrowings for each collateral asset. The following table details our asset-specific borrowings related to the GE portfolio acquisition ($ in thousands):

	September 30, 2018
		Principal		Book		Wtd. Avg.					Wtd. Avg.
GE Portfolio Acquisition Facility	Count	Balance(1)		Value		Yield/Cost(2)			Guarantee(3)		Term(4)
Collateral assets	11	$	662,464	$	664,189		5.92	%		n/a		May 2021
Financing provided	11	$	512,059	$	511,346		L+1.77	%	$	250,000		May 2021

(1)	As of September 30, 2018, this facility provided for $608.7 million of financing, of which $512.1 million was outstanding and an additional $96.6 million was available to finance future loan fundings in the GE portfolio.
(2)	In addition to cash coupon, yield/cost includes the amortization of deferred origination fees / financing costs.
(3)	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.
(4)	The weighted-average term is determined based on the maximum maturity of the corresponding loans, assuming all extension options are exercised by the borrower. Each of our asset-specific financings are term-matched to the corresponding collateral loans.

Refer to Note 5 to our consolidated financial statements for additional terms and details of our secured debt agreements, including certain financial covenants.

Revolving Credit Agreement

We have a $250.0 million full recourse secured revolving credit agreement with Barclays that is designed to finance first mortgage originations for up to six months as a bridge to term financing or syndication. Advances under the 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 collateral. The maturity date of the facility is April 4, 2020.

During the nine months ended September 30, 2018, the weighted-average outstanding borrowings under the revolving credit agreement was $37.8 million and we recorded interest expense of $2.6 million, including $825,000 of amortization of deferred fees and expenses. As of September 30, 2018, we had no outstanding borrowings under the agreement.

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Loan Participations Sold

The following table details our loan participations sold ($ in thousands):

September 30, 2018

Principal

Book

Loan Participations Sold

Count

Balance

Value

Yield/Cost(1)

Guarantee(2)

Term

Total loan

1

$

106,259

$

105,149

L+6.06

%

n/a

Feb. 2022

Senior participation(3)(4)

1

81,170

81,044

L+4.08

%

n/a

Feb. 2022

(1)	Our 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, yield/cost includes the amortization of deferred fees / financing costs.
(2)	As of September 30, 2018, our loan participations sold was non-recourse to us.
(3)	During the three and nine months ended September 30, 2018, we recorded $11.7 million and $15.2 million, respectively, of interest expense related to our loan participations sold.
(4)	The difference between principal balance and book value of loan participations sold is due to deferred financing costs of $126,000 as of September 30, 2018.

Refer to Note 6 to our consolidated financial statements for additional details of our loan participations sold.

Non-Consolidated Senior Interests

In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. These non-consolidated senior interests provide structural leverage for our net investments which are reflected in the form of mezzanine loans or other subordinate interests on our balance sheet and in our results of operations. The following table details the subordinate interests retained on our balance sheet and the related non-consolidated senior interests as of September 30, 2018 ($ in thousands):

September 30, 2018

Principal

Book

Wtd. Avg.

Wtd. Avg.

Non-Consolidated Senior Interests

Count

Balance

Value

Yield/Cost(1)

Guarantee

Term

Total loan

3

$

572,899

n/a

6.13

%

n/a

Oct. 2022

Senior participation

3

466,728

n/a

4.66

%

n/a

Oct. 2022

(1)   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, all-in yield/cost includes the amortization of deferred fees / financing costs.

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Securitized Debt Obligations

The following table details our securitized debt obligations ($ in thousands):

	September 30, 2018
Securitized Debt Obligations	Count	Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Term(2)
Collateralized Loan Obligation
Collateral assets	28	$	1,000,000	$	1,000,000		6.09	%		Feb. 2022
Financing provided	1		817,500		809,944		L+1.74	%		June 2035
2017 Single Asset Securitization
Collateral assets(3)	1		678,963		675,437		L+3.60	%		June 2023
Financing provided	1		474,620		474,418		L+1.65	%		June 2033
Total
Collateral assets	29	$	1,678,963	$	1,675,437		6.00	%
Financing provided(4)	2	$	1,292,120	$	1,284,362		L+1.71	%

(1)	As of September 30, 2018, 98% of our loans financed by securitized debt obligations earned a floating rate of interest. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, purchase discounts, and accrual of exit fees. All-in yield for the total portfolio assume applicable floating benchmark rates for weighted-average calculation.
(2)	Loan term represents weighted-average final maturity, assuming all extension options are exercised by the borrower. Repayments of securitized debt obligations are tied to timing of the related collateral loan asset repayments. The term of these obligations represents the rated final distribution date of the securitizations.
(3)	The collateral assets for the 2017 Single Asset Securitization include the total loan amount, of which we securitized $500.0 million.
(4)	During the three and nine months ended September 30, 2018, we recorded $12.5 million and $35.6 million, respectively, of interest expense related to our securitized debt obligations.

Refer to Notes 7 and 15 to our consolidated financial statements for additional details of our securitized debt obligations.

Floating Rate Portfolio

Generally, our business model is such that rising interest rates will increase our net income, while declining interest rates will decrease net income. As of September 30, 2018, 95% of our loans by total loan exposure earned a floating rate of interest and were financed with liabilities that pay interest at floating rates, which resulted in an amount of net equity that is positively correlated to rising interest rates, subject to the impact of interest rate floors on certain of our floating rate loans. As of September 30, 2018, the remaining 5% of our loans by total loan exposure earned a fixed rate of interest, but are financed with liabilities that pay interest at floating rates, which resulted in a negative correlation to rising interest rates to the extent of our financing. In certain instances where we have financed fixed rate assets with floating rate liabilities, we have purchased interest rate swaps or caps to limit our exposure to increases in interest rates on such liabilities.

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Our liabilities are generally currency and index-matched to each collateral asset, resulting in a net exposure to movements in benchmark rates that varies by currency silo based on the relative proportion of floating rate assets and liabilities. The following table details our loan portfolio’s net exposure to interest rates by currency as of September 30, 2018 ($/£/€/C$/A$ in thousands):

	USD			GBP			EUR			CAD			AUD
Floating rate loans(1)	$	9,986,336		£	323,317		€	1,068,587		C$	269,932		A$	305,004
Floating rate debt(1)(2)(3)		(6,805,153	)		(218,914	)		(812,100	)		(248,421	)		—
Net floating rate exposure(4)	$	3,181,183		£	104,403		€	256,487		C$	21,511		A$	305,004

(1)	Our floating rate loans and related liabilities are indexed to the various benchmark rates relevant in each case 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.
(2)	Includes borrowings under secured debt agreements, loan participations sold, non-consolidated senior interests, and securitized debt obligations.
(3)	Liabilities balance includes four interest rate swaps totaling C$107.8 million ($83.5 million as of September 30, 2018) that are used to hedge a portion of our fixed rate debt.
(4)	In addition, we have interest rate caps of $204.2 million and C$22.8 million to limit our exposure to increases in interest rates.

Convertible Notes

As of September 30, 2018, the following convertible senior notes, or Convertible Notes, were outstanding ($ in thousands):

Convertible Notes Issuance	Face Value		Coupon Rate			All-in Cost(1)			Maturity
November 2013	$	172,328		5.25	%		5.87	%		December 1, 2018
May 2017		402,500		4.38	%		4.85	%		May 5, 2022
March 2018		220,000		4.75	%		5.33	%		March 15, 2023

(1)   Includes issuance costs that are amortized through interest expense over the life of the Convertible Notes using the effective interest method.

Refer to Notes 2 and 8 to our consolidated financial statements for additional discussion of our Convertible Notes.

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III. Our Results of Operations

Operating Results

The following table sets forth information regarding our consolidated results of operations ($ in thousands, except per share data):

	Three Months Ended						2018 vs			Nine Months Ended						2018 vs
	September 30,						2017			September 30,						2017
	2018			2017			$			2018			2017			$
Income from loans and other investments
Interest and related income	$	203,107		$	146,446		$	56,661		$	550,011		$	391,787		$	158,224
Less: Interest and related expenses		97,955			67,891			30,064			255,677			168,917			86,760
Income from loans and other investments, net		105,152			78,555			26,597			294,334			222,870			71,464
Other expenses
Management and incentive fees		18,368			13,243			5,125			56,248			40,557			15,691
General and administrative expenses		8,443			7,419			1,024			25,897			22,219			3,678
Total other expenses		26,811			20,662			6,149			82,145			62,776			19,369
Income before income taxes		78,341			57,893			20,448			212,189			160,094			52,095
Income tax provision		48			83			(35	)		272			265			7
Net income		78,293			57,810			20,483			211,917			159,829			52,088
Net income attributable to non-controlling interests		(128	)		(88	)		(40	)		(481	)		(88	)		(393	)
Net income attributable to Blackstone Mortgage Trust, Inc.	$	78,165		$	57,722		$	20,443		$	211,436		$	159,741		$	51,695
Net income per share - basic and diluted	$	0.67		$	0.61		$	0.06		$	1.90		$	1.68		$	0.22
Dividends declared per share	$	0.62		$	0.62		$	—		$	1.86		$	1.86		$	—

Income from loans and other investments, net

Income from loans and other investments, net increased $26.6 million and $71.5 million during the three and nine months ended September 30, 2018, respectively, as compared to the corresponding periods in 2017. The increases in both periods were primarily due to (i) an increase in non-recurring prepayment fee income, (ii) an increase in the weighted-average principal balance of our loan portfolio by $1.9 billion and $2.2 billion during the three and nine months ended September 30, 2018, respectively, as compared to the corresponding periods in 2017, and (iii) an increase in LIBOR during 2018. This was offset by the increase in the weighted-average principal balance of our outstanding financing arrangements, which increased by $1.3 billion and $1.7 billion during the three and nine months ended September 30, 2018, respectively, as compared to the corresponding periods in 2017.

Other expenses

Other expenses are composed of management and incentive fees payable to our Manager and our general and administrative expenses. Other expenses increased by $6.1 million during the three months ended September 30, 2018 compared to the corresponding period in 2017 due to (i) an increase of $2.6 million of incentive fees payable to our Manager as a result of an increase in Core Earnings, (ii) an increase of $2.5 million of management fees payable to our Manager, primarily as a result of net proceeds received from the sale of our class A common stock in the fourth quarter of 2017 and the second and third quarters of 2018, (iii) $790,000 of additional non-cash restricted stock amortization related to shares awarded under our long-term incentive plans, and (iv) an increase of $234,000 of general operating expenses.

Other expenses increased by $19.4 million during the nine months ended September 30, 2018 compared to the nine months ended September 30, 2017 due to (i) an increase of $10.1 million of incentive fees payable to our Manager as a result of an increase in Core Earnings, (ii) an increase of $5.6 million of management fees payable to our Manager, primarily as a result of net proceeds received from the sale of our class A common stock in the fourth quarter of 2017 and the second and third quarters of 2018, (iii) $2.6 million of additional non-cash restricted stock amortization related to shares awarded under our long-term incentive plans, and (iv) an increase of $1.1 million of general operating expenses.

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Net income attributable to non-controlling interests

During the three and nine months ended September 30, 2018, we recognized $128,000 and $481,000, respectively, of net income attributable to non-controlling interests related to our Multifamily Joint Venture.

Dividends per share

During the three months ended September 30, 2018, we declared a dividend of $0.62 per share, or $74.2 million, which was paid on October 15, 2018 to common stockholders of record as of September 28, 2018. During the three months ended September 30, 2017, we declared a dividend of $0.62 per share, or $58.8 million.

During the nine months ended September 30, 2018, we declared aggregate dividends of $1.86 per share, or $210.4 million. During the nine months ended September 30, 2017, we declared aggregate dividends of $1.86 per share, or $176.4 million.

IV. Liquidity and Capital Resources

Capitalization

We have capitalized our business to date through, among other things, the issuance and sale of shares of our class A common stock, borrowings under secured debt agreements, and the issuance and sale of Convertible Notes. As of September 30, 2018, we had 119,669,195 shares of our class A common stock outstanding representing $3.3 billion of stockholders’ equity, $6.9 billion of outstanding borrowings under secured debt agreements, and $794.8 million of Convertible Notes outstanding.

As of September 30, 2018, our secured debt agreements consisted of credit facilities with an outstanding balance of $4.9 billion, $1.5 billion of asset-specific financings, and the GE portfolio acquisition facility with an outstanding balance of $512.1 million. We also finance our business through the sale of loan participations and non-consolidated senior interests. As of September 30, 2018, we had $81.2 million of loan participations sold and $466.7 million of non-consolidated senior interests outstanding. In addition, as of September 30, 2018, our consolidated balance sheet included $1.3 billion of securitized debt obligations related to our CLO and our 2017 Single Asset Securitization.

See Notes 5, 6, 7, and 8 to our consolidated financial statements for additional details regarding our secured debt agreements, loan participations sold, securitized debt obligations, and Convertible Notes, respectively.

Debt-to-Equity Ratio and Total Leverage Ratio

The following table presents our debt-to-equity ratio and total leverage ratio:

	September 30, 2018	December 31, 2017
Debt-to-equity ratio(1)	2.3x	2.0x
Total leverage ratio(2)	3.1x	2.8x

(1)	Represents (i) total outstanding secured debt agreements and convertible notes, less cash, to (ii) total equity, in each case at period end.
(2)	Represents (i) total outstanding secured debt agreements, convertible notes, loan participations sold, non-consolidated senior interests, and securitized debt obligations, less cash, to (ii) total equity, in each case at period end.

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Sources of Liquidity

Our primary sources of liquidity include cash and cash equivalents, available borrowings under our secured debt agreements, and net receivables from servicers related to loan repayments which are set forth in the following table ($ in thousands):

	September 30, 2018		December 31, 2017
Cash and cash equivalents	$	86,987	$	69,654
Available borrowings under secured debt agreements		572,986		595,848
Loan principal payments held by servicer, net(1)		3,577		15,763
	$	663,550	$	681,265

(1)   Represents loan principal payments held by our third-party servicer as of the balance sheet date which were remitted to us during the subsequent remittance cycle, net of the related secured debt balance.

In addition to our current sources of liquidity, we have access to liquidity through public offerings of debt and equity securities. To facilitate such offerings, in July 2016, we filed a shelf registration statement with the Securities and Exchange Commission, or the SEC, that is effective for a term of three years and expires in July 2019. The amount of securities to be issued pursuant to this shelf registration statement was not specified when it was filed and there is no specific dollar limit on the amount of securities we may issue. The securities covered by this registration statement include: (i) class A common stock; (ii) preferred stock; (iii) debt securities; (iv) depositary shares representing preferred stock; (v) warrants; (vi) subscription rights; (vii) purchase contracts; and (viii) units consisting of one or more of such securities or any combination of these securities. The specifics of any future offerings, along with the use of proceeds of any securities offered, will be described in detail in a prospectus supplement, or other offering materials, at the time of any offering.

We may also access liquidity through a dividend reinvestment plan and direct stock purchase plan, under which 9,995,647 shares of class A common stock were available for issuance as of September 30, 2018, and our at-the-market stock offering program, pursuant to which we may sell, from time to time, up to $38.6 million of additional shares of our class A common stock as of September 30, 2018. Refer to Note 10 to our consolidated financial statements for additional details.

Our existing loan portfolio also provides us with liquidity as loans are repaid or sold, in whole or in part, and the proceeds from such repayments become available for us to reinvest.

Liquidity Needs

In addition to our ongoing loan origination activity, our primary liquidity needs include interest and principal payments under our $6.9 billion of outstanding borrowings under secured debt agreements, our Convertible Notes, our unfunded loan commitments, dividend distributions to our stockholders, and operating expenses.

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Contractual Obligations and Commitments

Our contractual obligations and commitments as of September 30, 2018 were as follows ($ in thousands):

			Payment Timing
	Total		Less Than		1 to 3		3 to 5		More Than
	Obligation		1 Year		Years		Years		5 Years
Unfunded loan commitments(1)	$	3,046,350	$	173,345	$	1,153,750	$	1,719,255	$	—
Principal repayments under secured debt agreements(2)		6,862,256		273,254		2,393,008		4,112,794		83,200
Principal repayments of convertible notes(3)		794,828		172,328		—		622,500		—
Interest payments(2)(4)		959,085		295,263		459,181		203,100		1,541
Total(5)	$	11,662,519	$	914,190	$	4,005,939	$	6,657,649	$	84,741

(1)	The allocation of our unfunded loan commitments is based on the earlier of the commitment expiration date or the loan maturity date.
(2)	The allocation of repayments under our secured debt agreements for both principal and interest payments is based on the earlier of (i) the maturity date of each facility, or (ii) the maximum maturity date of the collateral loans, assuming all extension options are exercised by the borrower.
(3)	Reflects the outstanding principal balance of convertible notes, excluding any potential conversion premium. Refer to Note 8 to our consolidated financial statements for further details on our convertible notes.
(4)	Represents interest payments on our secured debt agreements and convertible notes. Future interest payment obligations are estimated assuming the amounts outstanding and the interest rates in effect as of September 30, 2018 will remain constant into the future. This is only an estimate as actual amounts borrowed and interest rates will vary over time.
(5)	Total does not include $81.2 million of loan participations sold, $466.7 million of non-consolidated senior interests, and $1.3 billion of securitized debt obligations, as the satisfaction of these liabilities will not require cash outlays from us.

We are also required to settle our foreign currency forward contracts and interest rate swaps with our derivative counterparties upon maturity which, depending on foreign exchange and interest rate movements, may result in cash received from or due to the respective counterparty. The table above does not include these amounts as they are not fixed and determinable. Refer to Note 9 to our consolidated financial statements for details regarding our derivative contracts.

We are required to pay our Manager a base management fee, an incentive fee, and reimbursements for certain expenses pursuant to our Management Agreement. The table above does not include the amounts payable to our Manager under our Management Agreement as they are not fixed and determinable. Refer to Note 11 to our consolidated financial statements for additional terms and details of the fees payable under our Management Agreement.

As a REIT, we generally must distribute substantially all of our net taxable income to stockholders in the form of dividends to comply with the REIT provisions of the Internal Revenue Code of 1986, as amended, or the Internal Revenue Code. Our taxable income does not necessarily equal our net income as calculated in accordance with GAAP, or our Core Earnings as described above.

Cash Flows

The following table provides a breakdown of the net change in our cash, cash equivalents, and restricted cash ($ in thousands):

	Nine Months Ended September 30,
	2018			2017
Cash flows provided by operating activities	$	222,735		$	176,539
Cash flows used in investing activities		(2,211,469	)		(319,687	)
Cash flows provided by financing activities		1,964,959			157,100
Net decrease in cash, cash equivalents, and restricted cash	$	(23,775	)	$	13,952

We experienced a net decrease in cash, cash equivalents, and restricted cash of $23.8 million for the nine months ended September 30, 2018, compared to a net increase of $14.0 million for the nine months ended September 30, 2017. During the nine months ended September 30, 2018, we (i) received $2.5 billion of proceeds from loan principal collections, (ii) borrowed a net $1.6 billion under our secured debt agreements, (iii) received $416.1 million in net

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proceeds from the 2018 Single Asset Securitization, (iv) received $369.8 million in net proceeds from the issuance of class A common stock, and (v) received $214.8 million of net proceeds from the issuance of a convertible notes offering. We used the proceeds from our debt and equity financing activities to fund $5.2 billion of new loans during the nine months ended September 30, 2018.

Refer to Note 3 to our consolidated financial statements for further discussion of our loan activity. Refer to Notes 5, 8, and 10 to our consolidated financial statements for additional discussion of our secured debt agreements, convertible notes, and equity.

V. Other Items

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 September 30, 2018 and December 31, 2017, we were in compliance with all REIT requirements.

Refer to Note 12 to our consolidated financial statements for additional discussion of our income taxes.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements.

Critical Accounting Policies

Our discussion and analysis of our financial condition and results of operations is based upon our consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these financial statements requires our Manager to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Actual results could differ from these estimates. There have been no material changes to our Critical Accounting Policies described in our annual report on Form 10-K filed with the SEC on February 13, 2018.

Refer to Note 2 to our consolidated financial statements for the description of our significant accounting policies.

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VI. Loan Portfolio Details                

The following table provides details of our loan portfolio, on a loan-by-loan basis, as of September 30, 2018 ($ in millions):

	Loan Type(1)	Origination Date(2)	Total Loan(3)(4)		Principal Balance(3)(4)		Net Book Value		Cash Coupon(5)		All-in Yield(5)		Maximum Maturity(6)	Location	Property Type	Loan Per SQFT / Unit / Key	LTV(2)		Risk Rating
1	Senior loan	3/22/2018	$	1,160.4		$     1,160.4	$	1,152.5		L + 3.15%		L + 3.40%	3/15/2023	Diversified - Spain	Spanish Assets	n/a		71%	3
2	Senior loan	5/11/2017		752.6		679.0		675.4		L + 3.40%		L + 3.60%	6/10/2023	Northern Virginia	Office	$332 / sqft		62%	3
3	Senior loan(3)	8/6/2015		481.4		481.4		87.5		4.48%		5.82%	10/29/2022	Diversified - EUR	Other	n/a		71%	3
4	Senior loan	5/1/2015		355.0		339.7		338.8		L + 2.85%		L + 3.02%	5/1/2023	New York	Office	$431 / sqft		68%	2
5	Senior loan	2/13/2018		330.0		312.3		311.8		L + 3.42%		L + 3.54%	3/9/2023	New York	Multi	$756,199 / unit		62%	3
6	Senior loan	1/7/2015		315.0		308.7		308.5		L + 3.50%		L + 3.71%	1/9/2021	New York	Office	$264 / sqft		53%	2
7	Senior loan	3/31/2017		339.3		266.8		263.7		L + 3.50%		L + 3.88%	8/9/2023	Maui	Hotel	$351,479 / key		61%	3
8	Senior loan	8/3/2016		275.9		228.5		227.8		L + 4.66%		L + 5.25%	8/9/2021	New York	Office	$314 / sqft		57%	3
9	Senior loan	12/22/2017		225.0		225.0		223.3		L + 2.80%		L + 3.16%	1/9/2023	Chicago	Multi	$326,087 / unit		65%	3
10	Senior loan	5/9/2018		219.0		219.0		217.4		L + 3.00%		L + 3.24%	5/9/2023	New York	Industrial	$62 / sqft		70%	3
11	Senior loan	6/23/2015		220.5		213.7		213.5		L + 3.65%		L + 3.78%	5/8/2022	Washington DC	Office	$239 / sqft		72%	2
12	Senior loan	6/4/2015		208.0		208.0		210.3		L + 4.19%		L + 4.14%	5/21/2021	Diversified - CAN	Hotel	$43,920 / key		54%	2
13	Senior loan	4/15/2016		225.0		200.0		198.2		L + 3.25%		L + 3.84%	4/9/2023	New York	Office	$186 / sqft		40%	3
14	Senior loan	2/25/2014		195.0		195.0		194.6		L + 4.01%		L + 4.46%	3/9/2021	Diversified - US	Hotel	$102,470 / key		55%	2
15	Senior loan	6/4/2018		190.0		190.0		188.3		L + 3.50%		L + 3.86%	6/9/2024	New York	Hotel	$313,015 / key		52%	3
16	Senior loan	4/9/2018		1,792.0		185.0		167.2		L + 8.50%		L + 8.76%	6/9/2025	New York	Office	$633 / sqft		48%	2
17	Senior loan	12/22/2016		204.1		182.6		182.6		L + 3.50%		L + 4.07%	1/9/2022	New York	Office	$257 / sqft		66%	3
18	Senior loan	4/3/2018		178.6		176.6		175.3		L + 2.75%		L + 3.08%	4/9/2024	Dallas	Various	$500 / sqft		64%	3
19	Senior loan	3/8/2016		181.2		176.3		175.6		L + 3.55%		L + 3.81%	3/9/2021	Orange County	Office	$221 / sqft		52%	3
20	Senior loan	4/12/2018		259.3		175.9		174.9		L + 2.93%		L + 3.31%	11/20/2022	New York	Various	$33 / sqft		58%	2
21	Senior loan	9/14/2018		182.2		174.2		172.5		L + 3.50%		L + 3.85%	9/14/2023	Canberra - AU	Other	$452 / sqft		68%	3
22	Senior loan	5/16/2017		189.2		171.8		170.6		L + 3.90%		L + 4.29%	5/16/2021	Chicago	Office	$129 / sqft		59%	3
23	Senior loan	8/31/2017		183.0		169.2		168.0		L + 3.00%		L + 3.40%	9/9/2022	Orange County	Office	$201 / sqft		64%	3
24	Senior loan	11/30/2017		197.4		168.1		166.6		L + 3.80%		L + 4.20%	12/9/2022	San Jose	Office	$279 / sqft		64%	2
25	Senior loan	9/26/2018		165.0		160.9		159.3		L + 2.25%		L + 2.61%	10/9/2025	Honolulu	Multi	$309,423 / unit		72%	3
26	Senior loan	9/4/2018		172.7		151.1		149.4		L + 3.00%		L + 3.39%	9/9/2023	Las Vegas	Hotel	$182,930 / key		70%	3
27	Senior loan	8/23/2017		165.0		140.0		138.9		L + 3.25%		L + 3.64%	10/9/2022	Los Angeles	Office	$284 / sqft		74%	3
28	Senior loan	6/24/2015		135.0		134.3		133.8		L + 3.50%		L + 3.72%	4/9/2023	Honolulu	Hotel	$225,285 / key		67%	2
29	Senior loan	1/30/2014		133.4		133.4		132.8		L + 4.30%		L + 5.83%	12/1/2018	New York	Hotel	$212,341 / key		38%	2
30	Senior loan	10/5/2016		134.8		131.3		131.0		L + 4.35%		L + 4.80%	10/9/2021	Diversified - US	Hotel	$66,527 / key		61%	2

continued…

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	Loan Type(1)	Origination Date(2)	Total Loan(3)(4)		Principal Balance(3)(4)		Net Book Value		Cash Coupon(5)		All-in Yield(5)		Maximum Maturity(6)	Location	Property Type	Loan Per SQFT / Unit / Key	LTV(2)		Risk Rating
31	Senior loan	12/21/2017		182.5		129.9		128.5		L + 3.25%		L + 3.68%	1/9/2023	Atlanta	Office	$98 / sqft		51%	2
32	Senior loan	10/26/2016		129.4		129.4		128.9		L + 4.20%		L + 4.57%	11/9/2021	Oakland	Office	$136 / sqft		72%	2
33	Senior loan	6/29/2017		140.2		128.9		127.9		L + 2.85%		L + 3.30%	7/9/2022	Torrance	Multi	$254,808 / unit		68%	2
34	Senior loan	11/14/2017		128.5		128.5		127.6		L + 3.80%		L + 4.16%	12/9/2022	Huntington Beach	Hotel	$514,000 / key		57%	2
35	Senior loan	11/2/2017		140.0		124.0		123.0		L + 3.20%		L + 3.62%	11/9/2022	Boston	Industrial	$163 / sqft		69%	2
36	Senior loan	4/30/2018		167.0		118.3		116.8		L + 3.25%		L + 3.51%	4/30/2023	London - UK	Office	$532 / sqft		60%	3
37	Senior loan	7/31/2018		194.5		117.6		115.8		L + 3.50%		L + 4.03%	8/9/2022	Oakland	Office	$303 / sqft		50%	3
38	Senior loan	10/17/2016		112.1		112.1		111.7		L + 3.95%		L + 3.98%	10/21/2021	Diversified - UK	Other	$154 / sqft		73%	3
39	Senior loan	7/28/2016		119.0		110.5		110.2		L + 3.60%		L + 4.00%	8/9/2021	Atlanta	Office	$175 / sqft		70%	3
40	Senior loan	2/20/2014		110.0		110.0		109.9		L + 3.95%		L + 4.16%	3/9/2021	Long Island	Office	$161 / sqft		74%	2
41	Senior loan	1/26/2017		175.6		106.3		105.1		L + 5.50%		L + 6.06%	2/9/2022	Boston	Office	$1,003 / sqft		42%	2
42	Senior loan	3/21/2018		113.2		104.0		103.2		L + 3.10%		L + 3.36%	3/21/2024	Jacksonville	Office	$104 / sqft		72%	3
43	Senior loan	3/13/2018		123.0		103.0		101.9		L + 3.50%		L + 3.83%	4/9/2025	Honolulu	Hotel	$159,690 / key		50%	3
44	Senior loan	2/27/2015		105.7		102.3		101.8		L + 3.55%		L + 3.89%	4/28/2022	Chicago	Office	$209 / sqft		65%	2
45	Senior loan	5/22/2014		100.0		100.0		99.8		L + 3.75%		L + 3.92%	6/15/2021	Orange County	Office	$175 / sqft		74%	2
46	Senior loan	2/9/2017		98.8		98.8		97.9		L + 4.50%		L + 4.86%	5/29/2023	London	Office	$963 / sqft		69%	3
47	Senior loan	5/11/2017		135.9		97.7		96.7		L + 3.40%		L + 3.91%	6/10/2023	Northern Virginia	Office	$224 / sqft		38%	2
48	Senior loan	5/16/2014		100.0		95.8		95.6		L + 3.85%		L + 4.21%	4/9/2022	Miami	Office	$206 / sqft		67%	3
49	Senior loan	3/10/2016		98.5		95.4		95.2		L + 4.10%		L + 4.52%	4/9/2021	Chicago	Multi	$657,845 / unit		63%	3
50	Senior loan	6/1/2018		131.6		92.1		90.8		L + 3.40%		L + 3.75%	5/28/2023	London - UK	Office	$625 / sqft		70%	3
51	Senior loan(3)	6/30/2015		94.5		91.5		18.1		L + 4.75%		L + 5.54%	8/15/2022	San Francisco	Condo	$596 / sqft		60%	2
52	Senior loan	12/9/2014		104.5		89.6		89.5		L + 3.65%		L + 3.80%	12/9/2021	Diversified - US	Office	$77 / sqft		65%	2
53	Senior loan	2/18/2015		88.7		88.4		88.2		L + 3.75%		L + 4.17%	3/9/2020	Diversified - CA	Office	$182 / sqft		71%	2
54	Senior loan	2/12/2016		100.0		84.2		84.1		L + 4.15%		L + 4.46%	3/9/2021	Long Island	Office	$126 / sqft		65%	3
55	Senior loan	7/11/2014		87.2		84.3		84.1		L + 3.55%		L + 3.83%	8/9/2020	Chicago	Office	$161 / sqft		65%	2
56	Senior loan	4/12/2018		103.1		82.5		81.6		L + 2.75%		L + 3.14%	5/9/2023	Daly City	Office	$215 / sqft		72%	3
57	Senior loan	10/28/2014		85.0		82.3		82.3		L + 3.75%		L + 4.01%	11/9/2019	New York	Retail	$1,538 / sqft		78%	3
58	Senior loan	5/1/2015		79.4		79.4		79.3		L + 3.95%		L + 4.21%	5/9/2020	Maryland	Hotel	$203,634 / key		67%	3
59	Senior loan	7/20/2017		193.2		78.1		76.2		L + 5.10%		L + 6.07%	8/9/2022	Oakland	Office	$321 / sqft		58%	3
60	Senior loan	3/31/2017		91.2		75.1		74.7		L + 4.30%		L + 4.91%	4/9/2022	New York	Office	$368 / sqft		64%	3

continued…

59

	Loan Type(1)	Origination Date(2)	Total Loan(3)(4)		Principal Balance(3)(4)		Net Book Value		Cash Coupon(5)			All-in Yield(5)			Maximum Maturity(6)	Location	Property Type	Loan Per SQFT / Unit / Key	LTV(2)		Risk Rating
61	Senior loan	6/29/2016		75.4		72.2		72.0		L + 3.65%			L + 4.02%		7/9/2021	Fort Lauderdale	Office	$278 / sqft		64%	2
62	Senior loan	8/18/2017		71.9		71.9		71.5		L + 4.10%			L + 4.46%		8/18/2022	Brussels	Office	$114 / sqft		59%	3
63	Senior loan	6/4/2015		74.0		70.6		71.5		5.09%	(7)		5.25%	(7)	3/28/2019	Diversified - CAN	Retail	$41 / sqft		74%	3
64	Senior loan	7/26/2018		84.1		70.1		69.9		L + 2.75%			L + 2.85%		7/1/2024	Columbus	Multi	$65,962 / unit		69%	3
65	Senior loan	10/6/2014		67.0		67.0		67.0		L + 4.35%			L + 4.61%		10/9/2019	Long Island	Hotel	$108,943 / key		56%	3
66	Senior loan	11/30/2016		79.0		66.6		66.3		L + 3.95%			L + 4.39%		12/9/2021	Chicago	Retail	$1,317 / sqft		54%	3
67	Senior loan	4/5/2018		85.3		65.9		65.2		L + 3.10%			L + 3.51%		4/9/2023	Diversified - US	Industrial	$24 / sqft		54%	3
68	Senior loan	5/9/2017		73.7		63.5		63.1		L + 3.85%			L + 4.30%		5/9/2022	New York	Multi	$382,568 / unit		67%	3
69	Senior loan	3/11/2014		65.0		62.4		62.3		L + 4.50%			L + 4.77%		4/9/2019	New York	Multi	$700,698 / unit		65%	3
70	Senior loan	6/29/2017		64.2		60.5		60.1		L + 3.40%			L + 3.71%		7/9/2023	New York	Multi	$176,405 / unit		69%	3
71	Senior loan	7/13/2017		86.3		60.0		59.4		L + 3.75%			L + 4.18%		8/9/2022	Honolulu	Hotel	$192,926 / key		66%	3
72	Senior loan	1/13/2014		60.0		60.0		59.9		L + 3.45%			L + 3.71%		6/9/2020	New York	Office	$284 / sqft		53%	2
73	Senior loan	10/6/2017		55.9		55.7		55.4		L + 2.95%			L + 3.21%		10/9/2022	Nashville	Multi	$99,385 / unit		74%	3
74	Senior loan	9/9/2014		56.0		53.9		53.8		L + 4.00%			L + 4.25%		9/9/2019	Fort Lauderdale	Office	$155 / sqft		71%	1
75	Senior loan	5/20/2015		57.8		52.6		52.6		5.38%	(7)		5.44%	(7)	6/30/2019	Charlotte	Office	$103 / sqft		71%	3
76	Senior loan	11/23/2016		55.4		51.9		51.6		L + 3.50%			L + 3.80%		12/9/2022	New York	Multi	$216,432 / unit		65%	3
77	Senior loan	11/1/2017		52.1		51.8		51.5		L + 2.95%			L + 3.21%		11/9/2022	Denver	Multi	$154,127 / unit		74%	2
78	Senior loan	12/27/2016		57.2		49.5		49.2		L + 4.65%			L + 5.08%		1/9/2022	New York	Multi	$1,260,476 / unit		64%	3
79	Senior loan	9/20/2018		133.6		46.1		45.8		L + 4.00%			L + 4.07%		8/16/2023	Diversified - AU	Other	$120 / sqft		53%	3
80	Senior loan	9/22/2016		46.0		46.0		46.1		L + 4.25%			L + 4.90%		10/9/2019	New York	Office	$461 / sqft		51%	3
81	Senior loan	11/19/2015		48.7		46.0		46.1		L + 4.00%			L + 4.50%		10/9/2018	New York	Office	$1,180 / sqft		57%	3
82	Senior loan	5/8/2017		80.0		44.7		43.9		L + 3.75%			L + 4.71%		5/8/2022	Washington DC	Office	$373 / sqft		73%	3
83	Senior loan	5/20/2015		45.0		44.0		43.9		L + 3.00%			L + 3.08%		11/1/2022	Los Angeles	Office	$205 / sqft		59%	2
84	Senior loan	9/25/2018		49.3		43.8		43.5		L + 3.50%			L + 3.79%		9/1/2023	Chicago	Multi	$59,614 / unit		70%	3
85	Senior loan	8/29/2017		51.2		43.5		43.2		L + 3.10%			L + 3.52%		10/9/2022	Southern California	Industrial	$91 / sqft		65%	3
86	Senior loan	5/24/2018		81.3		42.4		41.6		L + 4.10%			L + 4.59%		6/9/2023	Boston	Office	$82 / sqft		55%	3
87	Senior loan	10/6/2017		41.1		41.0		40.8		L + 2.95%			L + 3.20%		10/9/2022	Las Vegas	Multi	$138,527 / unit		77%	2
88	Senior loan	6/26/2015		42.1		39.9		39.9		L + 3.75%			L + 4.14%		7/9/2020	San Diego	Office	$182 / sqft		73%	2
89	Senior loan	5/28/2015		48.6		37.0		36.9		L + 4.00%			L + 4.24%		6/30/2020	Los Angeles	Office	$42 / sqft		53%	2
90	Senior loan	10/6/2017		34.8		34.7		34.5		L + 2.95%			L + 3.20%		10/9/2022	Las Vegas	Multi	$120,456 / unit		75%	2

continued…

60

	Loan Type(1)	Origination Date(2)	Total Loan(3)(4)		Principal Balance(3)(4)		Net Book Value			Cash Coupon(5)		All-in Yield(5)		Maximum Maturity(6)	Location	Property Type	Loan Per SQFT / Unit / Key	LTV(2)		Risk Rating
91	Senior loan	7/2/2018		34.2		34.2		34.1			L + 3.65%		L + 3.86%	2/1/2020	Washington DC	Multi	$610,714 / unit		69%	3
92	Senior loan	6/12/2014		34.0		34.0		33.9			L + 4.00%		L + 4.23%	6/30/2020	Los Angeles	Office	$39 / sqft		44%	2
93	Senior loan	9/1/2017		37.8		31.9		31.6			L + 4.15%		L + 4.57%	9/9/2021	New York	Condo	$552 / sqft		64%	3
94	Senior loan	9/1/2016		28.2		28.2		28.3			L + 4.20%		L + 4.77%	9/1/2022	Atlanta	Multi	$192,991 / unit		72%	2
95	Senior loan	1/30/2018		28.0		28.0		27.8			L + 2.90%		L + 3.26%	2/9/2023	Houston	Multi	$135,266 / unit		66%	3
96	Senior loan	3/1/2018		28.0		28.0		27.8			L + 2.95%		L + 3.31%	3/9/2023	Houston	Multi	$102,564 / unit		72%	3
97	Senior loan	8/30/2018		28.7		25.5		25.3			L + 3.00%		L + 3.42%	9/1/2022	Boise	Multi	$100,394 / unit		73%	3
98	Senior loan	12/15/2017		22.5		22.5		22.2			L + 3.25%		L + 4.31%	12/9/2020	Diversified - US	Hotel	$8,465 / key		50%	2
99	Senior loan	6/4/2015		20.2		20.2		20.1			4.46%		4.90%	12/23/2021	Montreal - CAN	Office	$55 / sqft		45%	2
100	Senior loan	6/15/2018		22.0		18.5		18.5			L + 3.35%		L + 3.43%	7/1/2022	Phoenix	Multi	$64,685 / unit		78%	3
101	Senior loan	6/4/2015		17.3		17.3		17.3			4.59%		4.83%	3/1/2019	Ontario - CAN	Other	$50,873 / unit		59%	2
102	Senior loan	6/4/2015		16.7		16.7		16.7			5.15%		5.27%	9/4/2020	Diversified - CAN	Other	$3,630 / unit		61%	2
103	Senior loan	11/2/2017		17.9		16.5		16.5			L + 3.90%		L + 4.01%	11/1/2020	Phoenix	Multi	$63,492 / unit		59%	2
104	Senior loan	3/9/2018		17.8		16.3		16.3			L + 3.75%		L + 3.77%	4/1/2023	Los Angeles	Multi	$125,385 / unit		75%	3
105	Senior loan	10/20/2017		17.2		14.0		13.9			L + 4.25%		L + 4.35%	11/1/2021	Houston	Multi	$110,714 / unit		56%	3
106	Senior loan	9/6/2017		13.3		13.3		13.3			L + 4.25%		L + 4.54%	4/1/2019	Austin	Multi	$127,644 / unit		67%	3
107	Senior loan	7/13/2017		13.1		13.1		13.1			L + 4.50%		L + 4.63%	2/1/2020	Orlando	Multi	$60,648 / unit		72%	2
108	Senior loan	6/29/2018		11.6		11.6		11.6			L + 2.95%		L + 3.32%	7/1/2020	Washington DC	Multi	$61,053 / unit		60%	2
109	Senior loan	5/30/2018		10.1		8.7		8.7			L + 3.90%		L + 3.98%	6/1/2021	Scottsdale	Multi	$96,667 / unit		84%	3
110	Senior loan	6/18/2014		7.6		7.6		7.6			L + 4.00%		L + 4.50%	7/20/2019	Diversified - NL	Office	$43 / sqft		69%	2
111	Senior loan	7/21/2017		7.3		7.3		7.3			L + 5.00%		L + 5.02%	7/1/2019	Phoenix	Multi	$56,154 / unit		78%	3
112	Senior loan(3)	9/22/2017		91.0		0.0		(0.4	)		L + 5.25%		L + 6.11%	10/9/2022	Oakland	Multi	$446,078 / unit		46%	3
			$	15,843.8		$12,726.8	$	12,176.5			5.52%		5.89%	3.8 yrs					63%	2.7

(1) Senior loans include senior mortgages and similar credit quality loans, including related contiguous subordinate loans and pari passu participations in senior mortgage loans.

(2) Date loan was originated or acquired by us, and the LTV as of such date. Dates are not updated for subsequent loan modifications or upsizes.

(3) In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. As of September 30, 2018, three loans in our portfolio have been financed with an aggregate $466.7 million of non-consolidated senior interest, which are included in the table above.

(4) Portfolio excludes our $99.0 million subordinate risk retention interest in the $1.0 billion 2018 Single Asset Securitization. Refer to Notes 4 and 15 to our consolidated financial statements for details of the 2018 Single Asset Securitization.

(5) As of September 30, 2018, our floating rate loans were indexed to various benchmark rates, with 83% of floating rate loans by loan exposure indexed to USD LIBOR. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, and purchase discounts, as well as the accrual of exit fees.

(6) Maximum maturity assumes all extension options are exercised, however our loans may be repaid prior to such date.

(7) Loan consists of one or more floating and fixed rate tranches. Coupon and all-in yield assume applicable floating benchmark rates for weighted-average calculation.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

Loan Portfolio Net Interest Income

Generally, our business model is such that rising interest rates will increase our net income, while declining interest rates will decrease net income. As of September 30, 2018, 95% of our loans by total loan exposure earned a floating rate of interest and were financed with liabilities that pay interest at floating rates, which resulted in an amount of net equity that is positively correlated to rising interest rates, subject to the impact of interest rate floors on certain of our floating rate loans. As of September 30, 2018, the remaining 5% of our loans by total loan exposure earned a fixed rate of interest, but are financed with liabilities that pay interest at floating rates, which resulted in a negative correlation to rising interest rates to the extent of our financing. In certain instances where we have financed fixed rate assets with floating rate liabilities, we have purchased interest rate swaps or caps to limit our exposure to increases in interest rates on such liabilities.

The following table projects the impact on our interest income and expense, net of incentive fees, for the twelve-month period following September 30, 2018, assuming an immediate increase or decrease of both 25 and 50 basis points in the applicable interest rate benchmark by currency ($ in thousands):

					Interest Rate Sensitivity as of September 30, 2018
Currency	Assets (Liabilities) Subject to Interest     Rate Sensitivity(1)(2)				25 Basis Point       Increase			25 Basis Point       Decrease			50 Basis Point       Increase			50 Basis Point       Decrease
USD	$	9,986,336		Income	$	19,826		$	(19,700	)	$	39,652		$	(38,456	)
		(6,805,153	)	Expense		(12,630	)		13,481			(25,685	)		26,928
	$	3,181,183		Net interest	$	7,196		$	(6,219	)	$	13,967		$	(11,528	)
GBP	$	421,314		Income	$	843		$	(843	)	$	1,685		$	(1,538	)
		(285,266	)	Expense		(571	)		571			(1,141	)		1,141
	$	136,048		Net interest	$	272		$	(272	)	$	544		$	(397	)
EUR	$	1,239,988		Income	$	—		$	—		$	1,313		$	—
		(942,361	)	Expense		—			—			(978	)		—
	$	297,627		Net interest	$	—		$	—		$	335		$	—
CAD(3)	$	209,120		Income	$	418		$	(418	)	$	836		$	(836	)
		(192,455	)	Expense		(348	)		385			(697	)		770
	$	16,665		Net interest	$	70		$	(33	)	$	139		$	(66	)
AUD	$	220,335		Income	$	441		$	(441	)	$	881		$	(881	)
		—		Expense		—			—			—			—
	$	220,335		Net interest	$	441		$	(441	)	$	881		$	(881	)
				Total net interest	$	7,979		$	(6,965	)	$	15,866		$	(12,872	)

(1) Our floating rate loans and related liabilities are indexed to the various benchmark rates relevant in each case 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. Increases (decreases) in interest income and expense are presented net of incentive fees. Refer to Note 11 to our consolidated financial statements for additional details of our incentive fee calculation.

(2) Includes borrowings under secured debt agreements, loan participations sold, non-consolidated senior interests, and securitized debt obligations.

(3) Liabilities balance includes four interest rate swaps totaling C$107.8 million ($83.5 million as of September 30, 2018) that are used to hedge a portion of our fixed rate debt.

Loan Portfolio Value

As of September 30, 2018, 5% of our loans by total loan exposure earned a fixed rate of interest and as such, the values of such loans are sensitive to changes in interest rates. We generally hold all of our loans to maturity and so do not expect to realize gains or losses on our fixed rate loan portfolio as a result of movements in market interest rates.

62

Risk of Non-Performance

In addition to the risks related to fluctuations in cash flows and asset values associated with movements in interest rates, there is also the risk of non-performance on floating rate assets. In the case of a significant increase in interest rates, the additional debt service payments due from our borrowers may strain the operating cash flows of the collateral real estate assets and, potentially, contribute to non-performance or, in severe cases, default. This risk is partially mitigated by various facts we consider during our underwriting process, which in certain cases include a requirement for our borrower to purchase an interest rate cap contract.

Credit Risks

Our loans and investments are also subject to credit risk. The performance and value of our loans and investments depend upon the sponsors’ ability to operate the properties that serve as our collateral so that they produce cash flows adequate to pay interest and principal due to us. To monitor this risk, our Manager’s asset management team reviews our investment portfolios and in certain instances is in regular contact with our borrowers, monitoring performance of the collateral and enforcing our rights as necessary.

In addition, we are exposed to the risks generally associated with the commercial real estate market, including variances in occupancy rates, capitalization rates, absorption rates, and other macroeconomic factors beyond our control. We seek to manage these risks through our underwriting and asset management processes.

Capital Market Risks

We are exposed to risks related to the equity capital markets, and our related ability to raise capital through the issuance of our class A common stock or other equity instruments. We are also exposed to risks related to the debt capital markets, and our related ability to finance our business through borrowings under credit facilities or other debt instruments. As a REIT, we are required to distribute a significant portion of our taxable income annually, which constrains our ability to accumulate operating cash flow and therefore requires us to utilize debt or equity capital to finance our business. We seek to mitigate these risks by monitoring the debt and equity capital markets to inform our decisions on the amount, timing, and terms of capital we raise.

Counterparty Risk

The nature of our business requires us to hold our cash and cash equivalents and obtain financing from various financial institutions. This exposes us to the risk that these financial institutions may not fulfill their obligations to us under these various contractual arrangements. We mitigate this exposure by depositing our cash and cash equivalents and entering into financing agreements with high credit-quality institutions.

The nature of our loans and investments also exposes us to the risk that our counterparties do not make required interest and principal payments on scheduled due dates. We seek to manage this risk through a comprehensive credit analysis prior to making an investment and active monitoring of the asset portfolios that serve as our collateral.

Currency Risk

Our loans and investments that are denominated in a foreign currency are also subject to risks related to fluctuations in currency rates. We mitigate this exposure by matching the currency of our foreign currency assets to the currency of the borrowings that finance those assets. As a result, we substantially reduce our exposure to changes in portfolio value related to changes in foreign currency rates. In certain circumstances, we may also enter into foreign currency derivative contracts to further mitigate this exposure.

The following table outlines our assets and liabilities that are denominated in a foreign currency (£/€/C$/A$ in thousands):

	September 30, 2018
Foreign currency assets(1)	£	697,158		€	1,074,967		C$	438,514		A$	305,824
Foreign currency liabilities(1)		(521,956	)		(808,196	)		(356,904	)		(42	)
Foreign currency contracts - notional		(79,100	)		(185,000	)		(71,600	)		(305,000	)
Net exposure to exchange rate fluctuations	£	96,102		€	81,771		C$	10,010		A$	782

(1)   Balances include non-consolidated senior interests of £302.0 million.

63

We estimate that a 10% appreciation of the United States dollar relative to the British Pound Sterling and the Euro would result in a decline in our net assets in U.S. dollar terms of $22.8 million and $31.0 million, respectively, as of September 30, 2018. Substantially all of our net asset exposure to the Canadian and Australian dollar has been hedged with foreign currency forward contracts.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

An evaluation of the effectiveness of the design and operation of our “disclosure controls and procedures” (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), as of the end of the period covered by this quarterly report on Form 10-Q was made under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer. Based upon this evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures (a) are effective to ensure that information required to be disclosed by us in reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified by SEC rules and forms and (b) include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in reports filed or submitted under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Controls over Financial Reporting

There have been no changes in our “internal control over financial reporting” (as defined in Rule 13a-15(f) of the Exchange Act) that occurred during the period covered by this quarterly report on Form 10-Q that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

64

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

From time to time, we may be involved in various claims and legal actions arising in the ordinary course of business. As of September 30, 2018, we were not involved in any material legal proceedings.

ITEM 1A. RISK FACTORS

There have been no material changes to the risk factors previously disclosed under Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2017.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

65

ITEM 6. EXHIBITS

31.1	Certification of Chief Executive Officer, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1 +	Certification of Chief Executive Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2 +	Certification of Chief Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

+ This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liability of that Section. Such exhibit shall not be deemed incorporated into any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act.

The agreements and other documents filed as exhibits to this report are not intended to provide factual information or other disclosure other than with respect to the terms of the agreements or other documents themselves, and you should not rely on them for that purpose. In particular, any representations and warranties made by us in these agreements or other documents were made solely within the specific context of the relevant agreement or document and may not describe the actual state of affairs as of the date they were made or at any other time.

66

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	BLACKSTONE MORTGAGE TRUST, INC.
October 23, 2018	/s/ Stephen D. Plavin
Date	Stephen D. Plavin
	Chief Executive Officer
	(Principal Executive Officer)
October 23, 2018	/s/ Anthony F. Marone, Jr.
Date	Anthony F. Marone, Jr.
	Chief Financial Officer
	(Principal Financial Officer and
	Principal Accounting Officer)

67

EX-31.1

Exhibit 31.1

CERTIFICATION

PURSUANT TO 17 CFR 240.13a-14

PROMULGATED UNDER

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Stephen D. Plavin, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Blackstone Mortgage Trust, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 23, 2018

/s/ Stephen D. Plavin

Stephen D. Plavin

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

PURSUANT TO 17 CFR 240.13a-14

PROMULGATED UNDER

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Anthony F. Marone, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q of Blackstone Mortgage Trust, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 23, 2018

/s/ Anthony F. Marone, Jr.

Anthony F. Marone, Jr.

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Blackstone Mortgage Trust, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Stephen D. Plavin, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Stephen D. Plavin

Stephen D. Plavin

Chief Executive Officer

October 23, 2018

This certification accompanies each Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

A signed original of this written statement required by Section 906 has been provided by the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Blackstone Mortgage Trust, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Anthony F. Marone, Jr., Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Anthony F. Marone, Jr.

Anthony F. Marone, Jr.

Chief Financial Officer

October 23, 2018

This certification accompanies each Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

A signed original of this written statement required by Section 906 has been provided by the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 16, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	BXMT
Entity Registrant Name	BLACKSTONE MORTGAGE TRUST, INC.
Entity Central Index Key	0001061630
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		119,669,604

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 86,987	$ 69,654
Restricted cash		32,864
Loans receivable, net	12,176,516	10,056,732
Other assets	155,972	99,575
Total Assets	12,419,475	10,258,825
Liabilities and Equity
Secured debt agreements, net	6,841,759	5,273,855
Loan participations sold, net	81,044	80,415
Securitized debt obligations, net	1,284,362	1,282,412
Convertible notes, net	780,951	563,911
Other liabilities	123,366	140,826
Total Liabilities	9,111,482	7,341,419
Commitments and contingencies
Equity
Class A common stock, $0.01 par value, 200,000,000 shares authorized, 119,669,195 and 107,883,860 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	1,197	1,079
Additional paid-in capital	3,898,841	3,506,861
Accumulated other comprehensive loss	(32,849)	(29,706)
Accumulated deficit	(566,417)	(567,168)
Total Blackstone Mortgage Trust, Inc. stockholders' equity	3,300,772	2,911,066
Non-controlling interests	7,221	6,340
Total Equity	3,307,993	2,917,406
Total Liabilities and Equity	$ 12,419,475	$ 10,258,825

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Billions	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
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	119,669,195	107,883,860
Common stock, shares outstanding	119,669,195	107,883,860
Variable interest entity, consolidated, carrying amount, assets	$ 1.5	$ 1.5
Variable interest entity, consolidated, carrying amount, liabilities	$ 1.3	$ 1.3

XML

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income from loans and other investments
Interest and related income	$ 203,107	$ 146,446	$ 550,011	$ 391,787
Less: Interest and related expenses	97,955	67,891	255,677	168,917
Income from loans and other investments, net	105,152	78,555	294,334	222,870
Other expenses
Management and incentive fees	18,368	13,243	56,248	40,557
General and administrative expenses	8,443	7,419	25,897	22,219
Total other expenses	26,811	20,662	82,145	62,776
Income before income taxes	78,341	57,893	212,189	160,094
Income tax provision	48	83	272	265
Net income	78,293	57,810	211,917	159,829
Net income attributable to non-controlling interests	(128)	(88)	(481)	(88)
Net income attributable to Blackstone Mortgage Trust, Inc.	$ 78,165	$ 57,722	$ 211,436	$ 159,741
Net income per share of common stock basic and diluted	$ 0.67	$ 0.61	$ 1.90	$ 1.68
Weighted-average shares of common stock outstanding, basic and diluted	116,203,140	95,013,087	111,251,864	95,004,188
Dividends declared per share of common stock	$ 0.62	$ 0.62	$ 1.86	$ 1.86

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net income	$ 78,293	$ 57,810	$ 211,917	$ 159,829
Other comprehensive income
Unrealized (loss) gain on foreign currency remeasurement	(2,416)	16,175	(26,766)	43,990
Realized and unrealized gain (loss) on derivative financial instruments	1,703	(8,029)	23,623	(20,150)
Other comprehensive (loss) income	(713)	8,146	(3,143)	23,840
Comprehensive income	77,580	65,956	208,774	183,669
Comprehensive income attributable to non-controlling interests	(128)	(88)	(481)	(88)
Comprehensive income attributable to Blackstone Mortgage Trust, Inc.	$ 77,452	$ 65,868	$ 208,293	$ 183,581

XML

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Class A Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Accumulated Deficit [Member]	Stockholders' Equity [Member]	Non-Controlling Interests [Member]
Balance at Dec. 31, 2016	$ 2,493,603	$ 945	$ 3,089,997	$ (56,202)	$ (541,137)	$ 2,493,603
Shares of class A common stock issued, net	3	3				3
Restricted class A common stock earned	17,493		17,493			17,493
Issuance of convertible notes	964		964			964
Dividends reinvested	31		327		(296)	31
Deferred directors' compensation	313		313			313
Other comprehensive income	23,840			23,840		23,840
Net income	159,829				159,741	159,741	$ 88
Dividends declared on common stock	(176,374)				(176,374)	(176,374)
Contributions to non-controlling interests	6,090						6,090
Balance at Sep. 30, 2017	2,525,792	948	3,109,094	(32,362)	(558,066)	2,519,614	6,178
Balance at Dec. 31, 2017	2,917,406	1,079	3,506,861	(29,706)	(567,168)	2,911,066	6,340
Shares of class A common stock issued, net	369,790	118	369,672			369,790
Restricted class A common stock earned	20,110		20,110			20,110
Issuance of convertible notes	1,462		1,462			1,462
Conversion of convertible notes	(20)		(20)			(20)
Dividends reinvested	39		381		(342)	39
Deferred directors' compensation	375		375			375
Other comprehensive income	(3,143)			(3,143)		(3,143)
Net income	211,917				211,436	211,436	481
Dividends declared on common stock	(210,343)				(210,343)	(210,343)
Contributions from non-controlling interests	4,500						4,500
Distributions to non-controlling interests	(4,100)						(4,100)
Balance at Sep. 30, 2018	$ 3,307,993	$ 1,197	$ 3,898,841	$ (32,849)	$ (566,417)	$ 3,300,772	$ 7,221

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net income	$ 211,917	$ 159,829
Adjustments to reconcile net income to net cash provided by operating activities
Non-cash compensation expense	20,488	17,809
Amortization of deferred fees on loans and debt securities	(35,955)	(28,887)
Amortization of deferred financing costs and premiums/ discount on debt obligations	20,993	16,356
Changes in assets and liabilities, net
Other assets	(9,709)	(219)
Other liabilities	15,001	11,651
Net cash provided by operating activities	222,735	176,539
Cash flows from investing activities
Origination and fundings of loans receivable	(5,222,803)	(2,314,721)
Principal collections and sales proceeds from loans receivable	2,503,454	1,976,271
Loan contributed to securitization	512,002
Investment in debt securities held-to-maturity	(95,937)
Origination and exit fees received on loans receivable	74,111	38,434
Receipts under derivative financial instruments	34,975	6,115
Payments under derivative financial instruments	(14,031)	(18,115)
Return of collateral deposited under derivative agreements	28,870	8,980
Collateral deposited under derivative agreements	(32,110)	(16,651)
Net cash used in investing activities	(2,211,469)	(319,687)
Cash flows from financing activities
Borrowings under secured debt agreements	5,749,678	2,776,058
Repayments under secured debt agreements	(4,147,893)	(2,481,250)
Proceeds from sale of loan participations	86,339	33,193
Repayment of loan participations	(85,875)	(381,310)
Payment of deferred financing costs	(18,995)	(13,591)
Contributions from non-controlling interests	4,500	6,090
Distributions to non-controlling interests	(4,100)
Net proceeds from issuance of convertible notes	214,775	394,074
Repayment of convertible notes	(192)
Net proceeds from issuance of class A common stock	369,787	31
Dividends paid on class A common stock	(203,065)	(176,195)
Net cash provided by financing activities	1,964,959	157,100
Net decrease in cash, cash equivalents, and restricted cash	(23,775)	13,952
Cash, cash equivalents, and restricted cash at beginning of period	102,518	75,567
Effects of currency translation on cash, cash equivalents, and restricted cash	8,244	4,566
Cash, cash equivalents, and restricted cash at end of period	86,987	94,085
Supplemental disclosure of cash flows information
Payments of interest	(224,320)	(141,124)
Payments of income taxes	(546)	(220)
Supplemental disclosure of non-cash investing and financing activities
Dividends declared, not paid	(74,195)	(58,793)
Loan principal payments held by servicer, net	$ 3,577	513
Consolidation of loans receivable of a VIE		500,000
Consolidation of securitized debt obligations of a VIE		$ (474,620)

XML

Organization

9 Months Ended

Sep. 30, 2018

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 senior loans collateralized by commercial real estate in North America, Europe, and Australia. Our investment objective is to preserve and protect shareholder capital while producing attractive risk-adjusted returns primarily through dividends generated from current income from our loan portfolio. 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.” Our principal executive offices are located at 345 Park Avenue, 42^nd Floor, New York, New York 10154. We were incorporated in Maryland in 1998, when we reorganized from a California common law business trust into a Maryland corporation.

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 an 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.

XML

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

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, 2017 filed with the Securities and Exchange Commission, or the SEC.

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.

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.

In the third quarter of 2018, we contributed a loan to a single asset securitization vehicle, or the 2018 Single Asset Securitization, which is a VIE, and invested in the related subordinate risk retention position. We are not the primary beneficiary of the VIE because we do not have the power to direct the activities that most significantly affect the VIE’s economic performance and, therefore, do not consolidate the 2018 Single Asset Securitization on our balance sheet. We have classified the subordinate risk retention position as a held-to-maturity debt security that is included in other assets on our consolidated balance sheets. Refer to Note 15 for additional discussion of our VIEs.

In April 2017, we entered into a joint venture, or our Multifamily Joint Venture, with Walker & Dunlop Inc. to originate, hold, and finance multifamily bridge loans. Pursuant to the terms of the agreements governing the joint venture, Walker & Dunlop contributed 15% of the venture’s equity capital and we contributed 85%. We consolidate the Multifamily Joint Venture as we have a controlling financial interest. The non-controlling interests included on our consolidated balance sheets represent the equity interests in our Multifamily Joint Venture that are owned by Walker & Dunlop. A portion of our Multifamily Joint Venture’s consolidated equity and results of operations are allocated to these non-controlling interests based on Walker & Dunlop’s pro rata ownership of our Multifamily Joint Venture.

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 portfolio and debt securities 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 and recorded over the term of the loan or debt security 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, Cash Equivalents, and Restricted Cash

Cash and cash equivalents represent cash held in banks 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 represents cash held in a segregated bank account related to a letter of credit.

The following table provides a reconciliation of cash, cash equivalents, and restricted cash in our consolidated balance sheets to the total amount shown in our consolidated statements of cash flows ($ in thousands):

	September 30, 2018		September 30, 2017
Cash and cash equivalents	$	86,987	$	61,221
Restricted cash		—		32,864
Total cash, cash equivalents, and restricted cash shown in our consolidated statements of cash flows	$	86,987	$	94,085

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 it 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: A loan that has a risk of realizing a principal loss.
5 -	Impaired/Loss Likely: A loan that has a very high risk of realizing a principal loss or has otherwise incurred a principal loss.

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 accretes from its allocated purchase price to its expected collection value over the life of the loan, consistent with the other loans in our portfolio.

Debt Securities Held-to-Maturity

We classify our debt securities as held-to-maturity, as we have the intent and ability to hold these securities until maturity. We include our debt securities in other assets on our consolidated balance sheets at amortized cost.

If, based on current information and events, there is an adverse change in cash flows expected to be collected from the cash flows previously projected for one of our debt securities, an other-than-temporary impairment is deemed to have occurred. A change in expected cash flows is considered adverse if the present value of the revised cash flows (taking into consideration both the timing and amount of cash flows expected to be collected), discounted using the debt security’s current yield, is less than the present value of the previously estimated remaining cash flows. If an other-than-temporary impairment is considered to have occurred, the debt security is written down to fair value. The total other-than-temporary impairment is bifurcated into (i) the amount related to expected credit losses, and (ii) the amount related to fair value adjustments in excess of expected credit losses. The other-than-temporary impairment related to expected credit losses is calculated by comparing the amortized cost basis of the security to the present value of cash flows expected to be collected, discounted at the security’s current yield, and is recognized in earnings in the consolidated statement of operations. The remaining other-than-temporary impairment that is not related to expected credit losses is recognized in other comprehensive income (loss). A portion of other-than-temporary impairments recognized through earnings is accreted back to the amortized cost basis of the security through interest income, while amounts recognized through other comprehensive income (loss) are amortized over the life of the security with no impact on earnings.

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 non-designated hedge. For all derivatives other than those designated as non-designated hedges, we formally document our hedge relationships and designation at the contract’s 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 and the changes in fair value of the instrument are included in net income prospectively. Changes in the fair value of our derivative instruments that qualify as hedges are reported as a component of accumulated other comprehensive income (loss) on our consolidated financial statements. Deferred gains and losses are reclassified out of accumulated other comprehensive income (loss) and into net income in the same period or periods during which the hedged transaction affects earnings, and are presented in the same line item as the earnings effect of the hedged item. For cash flow hedges, this is typically when the periodic swap settlements are made, while for net investment hedges, this occurs when the hedged item is sold or substantially liquidated. To the extent a derivative does not qualify for hedge accounting and is deemed a non-designated hedge, the changes in its fair value are included in net income concurrently.

Secured Debt Agreements

Where applicable, 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.

Senior Loan Participations

In certain instances, we finance our loans through the non-recourse syndication of a senior loan interest to a third-party. Depending on the particular structure of the syndication, the senior loan interest may remain on our GAAP balance sheet or, in other cases, the sale will be recognized and the senior loan interest will no longer be included in our consolidated financial statements. When these sales are not recognized under GAAP we reflect the transaction by recording a loan participations sold liability on our consolidated balance sheet, however this gross presentation does not impact stockholders’ equity or net income. When the sales are recognized, our balance sheet only includes our remaining subordinate loan and not the non-consolidated senior interest we sold.

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 respective issuance dates based on our nonconvertible debt borrowing rate. The equity component of each series of our 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 such 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 such 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 of the FASB, 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 the 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, which 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 and cash equivalents approximates fair value.

• Restricted cash: The carrying amount of restricted cash approximates fair value.

• Loans receivable, net: The fair values of these loans were estimated by our Manager based on a discounted cash flow methodology, taking into consideration various 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.

• Debt securities held-to-maturity: The fair value of these instruments was estimated by utilizing third-party pricing service providers. In determining the value of a particular investment, pricing service providers may use broker-dealer quotations, reported trades, or valuation estimates from their internal pricing models to determine the reported price.

• Derivative financial instruments: The fair value of our foreign currency and interest rate contracts was estimated 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, net: The fair value of these instruments was estimated based on the rate at which a similar credit facility would currently be priced.

• Loan participations sold, net: The fair value of these instruments was estimated based on the value of the related loan receivable asset.

• Securitized debt obligations, net: The fair value of these instruments was estimated by utilizing third-party pricing service providers. In determining the value of a particular investment, pricing service providers may use broker-dealer quotations, reported trades, or valuation estimates from their internal pricing models to determine the reported price.

• Convertible notes, net: Each series of the convertible notes is actively traded and their fair values were obtained using quoted market prices.

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 individuals employed by an affiliate of our Manager 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 our 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 our 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 (loss).

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 June 2018, the FASB issued ASU 2018-07 “Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting,” or ASU 2018-07. ASU 2018-07 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The guidance is intended to align the accounting for such payments to nonemployees with the existing requirements for share-based payments granted to employees. Upon adoption of ASU 2018-07, the cost of our long-term incentive plans will be a fixed amount determined based on the grant date fair value of shares granted, rather than the prior methodology that recognizes a variable cost based on the fair value of such shares as of their vesting dates. ASU 2018-07 is to be adopted through a cumulative-effect adjustment to retained earnings for outstanding share-based payments to nonemployees as of the beginning of the fiscal year in which the guidance is effective. We adopted ASU 2018-07 in the third quarter of 2018 and it did not have an impact on our consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13 “Financial Instruments – Credit Losses – Measurement of Credit Losses on Financial Instruments (Topic 326),” or ASU 2016-13. ASU 2016-13 significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. ASU 2016-13 will replace the “incurred loss” model under existing guidance with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. It also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 and is to be adopted through a cumulative-effect adjustment to retained earnings as of January 1, 2020. While we are currently evaluating the impact ASU 2016-13 will have on our consolidated financial statements, we expect that the adoption will result in an increased amount of provisions for potential loan losses as well as the recognition of such provisions earlier in the lending cycle. We currently do not have any provision for loan losses in our consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” or ASU 2014-09. ASU 2014-09 broadly amends the accounting guidance for revenue recognition. ASU 2014-09 is effective for the first interim or annual period beginning after December 15, 2017, and is to be applied retrospectively. We adoptedASU 2014-09 in the first quarter of 2018 and it did not have a material impact on our consolidated financial statements.

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Loans Receivable, Net

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Loans Receivable, Net

3. LOANS RECEIVABLE, NET

The following table details overall statistics for our loans receivable portfolio ($ in thousands):

	September 30, 2018			December 31, 2017
Number of loans		112			110
Principal balance	$	12,260,103		$	10,108,226
Net book value	$	12,176,516		$	10,056,732
Unfunded loan commitments(1)	$	3,046,350		$	1,573,107
Weighted-average cash coupon(2)		5.61	%		5.55	%
Weighted-average all-in yield(2)		5.94	%		5.95	%
Weighted-average maximum maturity (years)(3)		3.8			3.5

(1)	Unfunded commitments will primarily be funded to finance our borrowers’ construction or development of real estate-related assets, capital improvements of existing assets, or lease-related expenditures. These commitments will generally be funded over the term of each loan, subject in certain cases to an expiration date.
(2)	Our floating rate loans are indexed to various benchmark rates, with 83% and 92% of our floating rate loans by principal balance indexed to USD LIBOR as of September 30, 2018 and December 31, 2017, respectively. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, and purchase discounts, as well as the accrual of exit fees. Cash coupon and all-in yield assume applicable floating benchmark rates 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 September 30, 2018, 86% of our loans by principal balance were subject to yield maintenance or other prepayment restrictions and 14% were open to repayment by the borrower without penalty. As of December 31, 2017, 75% of our loans were subject to yield maintenance or other prepayment restrictions and 25% were open to repayment by the borrower without penalty.

Activity relating to our loans receivable portfolio was as follows ($ in thousands):

	Principal Balance			Deferred Fees / Other Items(1)			Net Book Value
December 31, 2017	$	10,108,226		$	(51,494	)	$	10,056,732
Loan fundings		5,222,803			—			5,222,803
Loan repayments		(2,452,811	)		—			(2,452,811	)
Loan contributed to securitization		(517,500	)		5,498			(512,002	)
Unrealized (loss) gain on foreign currency translation		(100,615	)		678			(99,937	)
Deferred fees and other items		—			(74,111	)		(74,111	)
Amortization of fees and other items		—			35,842			35,842
September 30, 2018	$	12,260,103		$	(83,587	)	$	12,176,516

(1)   Other items primarily consist of purchase discounts or premiums, exit fees, and deferred origination expenses.

The tables below detail the property type and geographic distribution of the properties securing the loans in our portfolio ($ in thousands):

September 30, 2018
Property Type	Number of Loans		Net Book Value		Total Loan Exposure(1)(2)		Percentage of Portfolio
Office		49	$	5,956,675	$	6,006,534		47%
Hotel		15		1,992,889		2,069,818		16
Multifamily		32		1,894,001		1,903,572		15
Spanish Assets		1		1,152,487		1,160,400		9
Retail		4		336,787		337,334		3
Condominium		2		84,429		158,462		1
Other		9		759,248		1,090,711		9
		112	$	12,176,516	$	12,726,831		100%
Geographic Location	Number of Loans		Net Book Value		Total Loan Exposure(1)(2)		Percentage of Portfolio
United States
Northeast		30	$	3,796,633	$	3,830,021		29%
West		25		2,543,743		2,637,582		21
Southeast		18		2,025,381		2,034,852		16
Midwest		8		901,310		906,102		7
Southwest		13		477,809		480,792		4
Northwest		2		141,199		141,630		1
Subtotal		96		9,886,075		10,030,979		78
International
Spain		1		1,152,487		1,160,400		9
United Kingdom		5		492,790		837,688		7
Canada		5		335,957		332,841		3
Australia		2		218,286		220,335		2
Belgium		1		71,494		71,945		1
Germany		1		11,814		65,000		—
Netherlands		1		7,613		7,643		—
Subtotal		16		2,290,441		2,695,852		22
Total		112	$	12,176,516	$	12,726,831		100%

(1)	In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $466.7 million of such non-consolidated senior interests as of September 30, 2018.
(2)	Excludes investment exposure to the $1.0 billion 2018 Single Asset Securitization. See Note 4 for details of the subordinated risk retention interest we own in the 2018 Single Asset Securitization.

December 31, 2017
Property Type	Number of Loans	Net Book Value		Total Loan Exposure(1)		Percentage of Portfolio
Office	53	$	5,773,972	$	5,807,170		53%
Hotel	15		1,830,568		1,905,497		17
Multifamily	25		1,220,423		1,228,959		11
Retail	6		487,473		940,980		8
Condominium	2		142,342		268,751		2
Other	9		601,954		942,251		9
	110	$	10,056,732	$	11,093,608		100%
Geographic Location	Number of Loans	Net Book Value		Total Loan Exposure(1)		Percentage of Portfolio
United States
Northeast	26	$	2,857,948	$	2,871,219		26%
West	29		2,672,069		2,816,276		24
Southeast	17		2,007,202		2,470,992		22
Midwest	9		856,559		862,578		8
Southwest	10		380,204		380,120		3
Northwest	2		283,381		286,221		3
Subtotal	93		9,057,363		9,687,406		86
International
United Kingdom	6		440,317		794,789		7
Canada	7		415,893		412,343		4
Belgium	1		73,779		74,431		1
Germany	1		12,237		67,399		1
Netherlands	2		57,143		57,240		1
Subtotal	17		999,369		1,406,202		14
Total	110	$	10,056,732	$	11,093,608		100%

(1)   In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $985.4 million of such non-consolidated senior interests as of December 31, 2017.

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):

September 30, 2018							December 31, 2017
Risk Rating		Number of Loans	Net Book Value		Total Loan Exposure(1)(2)		Risk Rating		Number of Loans	Net Book Value		Total Loan Exposure(1)
	1	1	$	53,849	$	53,873		1	1	$	31,842	$	31,890
	2	43		4,167,871		4,272,068		2	41		3,512,709		3,521,701
	3	68		7,954,796		8,400,890		3	67		6,491,617		7,519,465
	4	—		—		—		4	1		20,564		20,552
	5	—		—		—		5	—		—		—
		112	$	12,176,516	$	12,726,831			110	$	10,056,732	$	11,093,608

(1) In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $466.7 million and $985.4 million of such non-consolidatedsenior interests as of September 30, 2018 and December 31, 2017, respectively.

(2) Excludes investment exposure to the $1.0 billion 2018 Single Asset Securitization. See Note 4 for details of the subordinated risk retention interest we own in the 2018 Single Asset Securitization.

The weighted-average risk rating of our total loan exposure was 2.7 as of both September 30, 2018 and December 31, 2017. We had one loan with a risk rating of “4” in our portfolio as of December 31, 2017, which was repaid in full in April 2018.

We did not have any impaired loans, nonaccrual loans, or loans in maturity default as of September 30, 2018 or December 31, 2017.

Multifamily Joint Venture

As discussed in Note 2, we entered into a Multifamily Joint Venture in April 2017. As of September 30, 2018 and December 31, 2017, our Multifamily Joint Venture held $222.7 million and $182.2 million of loans, respectively, which are included in the loan disclosures above. Refer to Note 2 for additional discussion of our Multifamily Joint Venture.

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Other Assets and Liabilities

9 Months Ended

Sep. 30, 2018

Text Block [Abstract]

Other Assets and Liabilities

4. OTHER ASSETS AND LIABILITIES

The following table details the components of our other assets ($ in thousands):

	September 30, 2018		December 31, 2017
Debt securities held-to-maturity(1)	$	96,050	$	—
Accrued interest receivable		45,762		38,573
Collateral deposited under derivative agreements		7,360		4,120
Loan portfolio payments held by servicer(2)		3,902		54,759
Derivative assets		2,719		1,214
Prepaid expenses		151		798
Prepaid taxes		28		31
Other		—		80
Total	$	155,972	$	99,575

(1)	Represents a $99.0 million subordinate risk retention interest in the $1.0 billion 2018 Single Asset Securitization, with a yield to full maturity of L+10.0% and a maximum maturity date of June 9, 2025, assuming all extension options are exercised by the borrower. Refer to Note 15 for additional discussion.
(2)	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.

The following table details the components of our other liabilities ($ in thousands):

	September 30, 2018		December 31, 2017
Accrued dividends payable	$	74,195	$	66,888
Accrued interest payable		23,701		14,162
Accrued management and incentive fees payable		18,368		14,284
Derivative liabilities		3,676		4,911
Accounts payable and other liabilities		3,426		2,125
Secured debt repayments pending servicer remittance(1)		—		38,456
Total	$	123,366	$	140,826

(1)   Represents pending transfers from our third-party loan servicer that were remitted to our banking counterparties during the subsequent remittance cycle.

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Secured Debt Agreements, Net

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Secured Debt Agreements, Net

5. SECURED DEBT AGREEMENTS, NET

Our secured debt agreements include credit facilities, the GE portfolio acquisition facility, asset-specific financings, and a revolving credit agreement. The following table details our secured debt agreements ($ in thousands):

	Secured Debt Agreements Borrowings Outstanding
	September 30, 2018			December 31, 2017
Credit facilities	$	4,850,911		$	4,068,249
Asset-specific financings		1,499,286			518,864
GE portfolio acquisition facility		512,059			703,423
Revolving credit agreement		—			—
Total secured debt agreements	$	6,862,256		$	5,290,536
Deferred financing costs(1)		(20,497	)		(16,681	)
Net book value of secured debt	$	6,841,759		$	5,273,855

(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.

Credit Facilities

During the nine months ended September 30, 2018, we added one new credit facility, providing an additional $1.0 billion of credit capacity, and increased the maximum facility size of one of our existing credit facilities, providing an additional $250.0 million of credit capacity.

The following tables detail our credit facilities ($ in thousands):

	September 30, 2018
	Maximum		Credit Borrowings						Collateral
Lender	Facility Size(1)		Potential(2)		Outstanding		Available(2)		Assets(3)
Bank of America	$	1,000,000	$	863,592	$	863,592	$	—	$	1,091,860
Wells Fargo		2,000,000		1,160,678		850,687		309,991		1,577,251
MetLife		1,000,000		737,770		737,770		—		946,933
Barclays		1,000,000		617,360		617,360		—		771,700
Citibank(4)		750,000		576,369		480,129		96,240		730,723
JP Morgan		500,000		435,095		332,909		102,186		564,070
Morgan Stanley(5)		651,550		329,256		278,770		50,486		461,760
Deutsche Bank		500,000		277,247		277,247		—		380,986
Société Générale(6)		464,160		235,229		235,229		—		298,951
Goldman Sachs - Multi. JV(7)		250,000		117,498		117,498		—		148,099
Bank of America - Multi. JV(7)		200,000		59,720		59,720		—		74,650
	$	8,315,710	$	5,409,814	$	4,850,911	$	558,903	$	7,046,983

	December 31, 2017
	Maximum		Credit Borrowings						Collateral
Lender	Facility Size(1)		Potential(2)		Outstanding		Available(2)		Assets(3)
Wells Fargo	$	2,000,000	$	1,289,135	$	1,170,801	$	118,334	$	1,680,325
MetLife		1,000,000		807,164		807,164		—		1,039,231
Bank of America		750,000		573,542		573,542		—		765,049
JP Morgan		500,000		443,496		319,755		123,741		579,218
Société Générale(6)		480,200		300,871		300,871		—		373,181
Deutsche Bank		500,000		295,743		295,743		—		399,203
Citibank(4)		800,125		354,354		240,881		113,473		455,433
Morgan Stanley(5)		675,650		456,344		216,044		240,300		591,168
Bank of America - Multi. JV(7)		200,000		85,560		85,560		—		106,950
Goldman Sachs - Multi. JV(7)		250,000		57,888		57,888		—		75,225
	$	7,155,975	$	4,664,097	$	4,068,249	$	595,848	$	6,064,983

(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)	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 credit facility.
(3)	Represents the principal balance of the collateral assets.
(4)	As of September 30, 2018, the Citibank facility was denominated in U.S. dollars. As of December 31, 2017, the maximum facility size was composed of a $500.0 million facility denominated in U.S. dollars plus a €250.0 million facility, which translated to $300.1 million as of such date.
(5)	As of September 30, 2018 and December 31, 2017, the Morgan Stanley maximum facility size was £500.0 million, which translated to $651.6 million and $675.7 million, respectively.
(6)	As of September 30, 2018 and December 31, 2017, the Société Générale maximum facility size was €400.0 million, which translated to $464.2 million and $480.2 million, respectively.
(7)	These facilities finance the loan investments of our consolidated Multifamily Joint Venture. Refer to Note 2 for additional discussion of our Multifamily Joint Venture.

The weighted-average outstanding balance of our credit facilities was $4.4 billion for the nine months ended September 30, 2018. As of September 30, 2018, we had aggregate borrowings of $4.9 billion outstanding under our credit facilities, with a weighted-average cash coupon of LIBOR plus 1.77% per annum, a weighted-average all-in cost of credit, including associated fees and expenses, of LIBOR plus 1.98% per annum, and a weighted-average advance rate of 79.2%. As of September 30, 2018, outstanding borrowings under these facilities had a weighted-average maturity, excluding extension options and term-out provisions, of 1.5 years.

The weighted-average outstanding balance of our credit facilities was $4.2 billion for the nine months ended December 31, 2017. As of December 31, 2017, we had aggregated borrowings of $4.1 billion outstanding under our credit facilities, with a weighted-average cash coupon of LIBOR plus 1.90% per annum, a weighted-average all-in cost of credit, including associated fees and expenses, of LIBOR plus 2.12% per annum, and a weighted-average advance rate of 78.7%. As of December 31, 2017, outstanding borrowings under these facilities had a weighted-average maturity, excluding extension options and term-out provisions, of 1.5 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.

The following tables outline the key terms of our credit facilities as of September 30, 2018:

Lender	Currency	Guarantee(1)	Margin Call(2)	Term/Maturity
Morgan Stanley	$ /  £ / €	25%	Collateral marks only	March 3, 2020
Goldman Sachs - Multi. JV(3)	$	25%	Collateral marks only	July 12, 2020(4)
JP Morgan	$ /  £	50%	Collateral marks only	January 7, 2021
Bank of America - Multi. JV(3)	$	43%	Collateral marks only	July 19, 2021(5)
Deutsche Bank	$	32%	Collateral marks only	August 9, 2021(6)
Barclays	$	25%	Collateral marks only	March 29, 2023(7)
MetLife	$	50%	Collateral marks only	April 22, 2023(8)
Bank of America	$	50%	Collateral marks only	May 21, 2023(9)
Citibank	$  / £ / €	25%	Collateral marks only	Term matched(10)
Société Générale	$  / £ /  €	25%	Collateral marks only	Term matched(10)
Wells Fargo	$	25%	Collateral marks only	Term matched(10)

(1)	Other than amounts guaranteed based on specific collateral asset types, borrowings under our credit facilities are non-recourse to us.
(2)	Margin call provisions under our credit facilities do not permit valuation adjustments based on capital markets events, and are limited to collateral-specific credit marks.
(3)	These facilities finance the loan investments of our consolidated Multifamily Joint Venture. Refer to Note 2 for additional discussion of our Multifamily Joint Venture.
(4)	Includes a one-year extension option which may be exercised at our sole discretion.
(5)	Includes two one-year extension options which may be exercised at our sole discretion.
(6)	Includes two one-year extension options which may be exercised at our sole discretion.
(7)	Includes four one-year extension options which may be exercised at our sole discretion.
(8)	Includes four one-year extension options which may be exercised at our sole discretion.
(9)	Includes two one-year extension options which may be exercised at our sole discretion.
(10)	These credit 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.

Currency	Potential Borrowings		Outstanding Borrowings(1)		Floating Rate Index	Spread(2)	Advance Rate(3)
$		$  5,024,025		$  4,551,603	1-month USD LIBOR	1.75%	79.2%
€		€       54,869		€       12,100	3-month EURIBOR	2.28%	80.0%
£		£     247,194		£     218,914	3-month GBP LIBOR	1.97%	79.0%
		$  5,409,815		$  4,850,911		1.77%	79.2%

(1)	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 credit facility.
(2)	Represents weighted-average spread over the applicable floating rate index, based on borrowings outstanding.
(3)	Represents weighted-average advance rate based on the approved outstanding principal balance of the collateral assets pledged.

Asset-Specific Financings

During the nine months ended September 30, 2018, we entered into an €800.0 million asset-specific financing secured by a €1.0 billion senior loan. The following tables detail our asset-specific financings ($ in thousands):

	September 30, 2018
Asset-Specific Financings	Count	Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Guarantee(2)		Wtd. Avg. Term(3)
Collateral assets	5	$	1,905,475	$	1,895,094		L+3.61	%		n/a		Sep. 2022
Financing provided(4)	5	$	1,499,286	$	1,492,614		L+1.77	%	$	1,178,874		Sep. 2022
	December 31, 2017
Asset-Specific Financings	Count	Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Guarantee(2)		Wtd. Avg. Term(3)
Collateral assets	6	$	682,259	$	677,296		L+4.76	%		n/a		Dec. 2020
Financing provided(4)	6	$	518,864	$	517,088		L+2.50	%	$	162,475		Dec. 2020

(1)	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, yield/cost includes the amortization of deferred origination fees / financing costs.
(2)	Other than amounts guaranteed on an asset-by-asset basis, borrowings under our asset-specific financings are non-recourse to us.
(3)	The weighted-average term is determined based on the maximum maturity of the corresponding loans, assuming all extension options are exercised by the borrower. Each of our asset-specific financings are term-matched to the corresponding collateral loans.
(4)	As of September 30, 2018 and December 31, 2017, borrowings of $517.8 million and $394.8 million, respectively, under these asset specific financings are cross collateralized with related credit facilities with the same lenders.

The weighted-average outstanding balance of our asset-specific financings was $1.3 billion for the nine months ended September 30, 2018 and $522.5 million for the nine months ended December 31, 2017.

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. The GE portfolio acquisition facility is non-revolving and consists of a single master repurchase agreement providing for asset-specific borrowings for each collateral asset. The following tables detail our asset-specific borrowings related to the GE portfolio acquisition ($ in thousands):

	September 30, 2018
GE Portfolio Acquisition Facility	Count	Principal Balance(1)		Book Value		Wtd. Avg. Yield/Cost(2)			Guarantee(3)		Wtd. Avg. Term(4)
Collateral assets	11	$	662,464	$	664,189		5.92	%		n/a		May 2021
Financing provided	11	$	512,059	$	511,346		L+1.77	%	$	250,000		May 2021
	December 31, 2017
GE Portfolio Acquisition Facility	Count	Principal Balance(1)		Book Value		Wtd. Avg. Yield/Cost(2)			Guarantee(3)		Wtd. Avg. Term(4)
Collateral assets	16	$	906,707	$	911,092		5.74	%		n/a		Jul. 2020
Financing provided	16	$	703,423	$	702,337		L+1.72	%	$	250,000		Jul. 2020

(1)	As of September 30, 2018, this facility provided for $608.7 million of financing, of which $512.1 million was outstanding and an additional $96.6 million was available to finance future loan fundings in the GE portfolio. As of December 31, 2017, this facility provided for $816.3 million of financing, of which $703.4 million was outstanding and an additional $112.9 million was available to finance future loan fundings in the GE portfolio.
(2)	In addition to cash coupon, yield/cost includes the amortization of deferred origination fees / financing costs.
(3)	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.
(4)	The weighted-average term is determined based on the maximum maturity of the corresponding loans, assuming all extension options are exercised by the borrower. Each of our asset-specific financings are term-matched to the corresponding collateral loans.

Revolving Credit Agreement

We have a $250.0 million full recourse secured revolving credit agreement with Barclays that is designed to finance first mortgage originations for up to six months as a bridge to term financing or syndication. Advances under the 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 collateral. The maturity date of the facility is April 4, 2020.

During the nine months ended September 30, 2018, the weighted-average outstanding borrowings under the revolving credit agreement was $37.8 million and we recorded interest expense of $2.6 million, including $825,000 of amortization of deferred fees and expenses. As of September 30, 2018, we had no outstanding borrowings under the agreement.

During the nine months ended December 31, 2017, the weighted-average outstanding borrowings under the revolving credit agreement was $40.7 million and we recorded interest expense of $2.6 million, including $703,000 of amortization of deferred fees and expenses. As of December 31, 2017, we had no outstanding borrowings under the agreement.

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 1.4 to 1.0; (ii) our tangible net worth, as defined in the agreements, shall not be less than $2.4 billion as of each measurement date plus 75% of the net cash proceeds of future equity issuances subsequent to September 30, 2018; (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 September 30, 2018 and December 31, 2017, we were in compliance with these covenants.

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Loan Participations Sold, Net

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Loan Participations Sold, Net

6. LOAN PARTICIPATIONS SOLD, NET

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 generally based on the performance of the related loan obligation. The gross presentation of loan participations sold does not impact stockholders’ equity or net income.

The following tables detail our loan participations sold ($ in thousands):

September 30, 2018

Loan Participations Sold

Count

Principal Balance

Book Value

Yield/Cost(1)

Guarantee(2)

Term

Total loan

1

$

106,259

$

105,149

L+6.06

%

n/a

Feb. 2022

Senior participation(3)(4)

1

81,170

81,044

L+4.08

%

n/a

Feb. 2022

December 31, 2017

Loan Participations Sold

Count

Principal Balance

Book Value

Yield/Cost(1)

Guarantee(2)

Term

Total loan

1

$

141,119

$

138,907

L+5.94

%

n/a

Feb. 2022

Senior participation(3)(4)

1

80,706

80,415

L+4.14

%

n/a

Feb. 2022

(1)	Our 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, yield/cost includes the amortization of deferred fees / financing costs.
(2)	As of September 30, 2018 and December 31, 2017, our loan participations sold was non-recourse to us.
(3)	During the three and nine months ended September 30, 2018, we recorded $11.7 million and $15.2 million, respectively, of interest expense related to our loan participations sold. During the three and nine months ended September 30, 2017, we recorded $4.0 million and $9.3 million, respectively, of interest expense related to our loan participations sold.
(4)	The difference between principal balance and book value of loan participations sold is due to deferred financing costs of $126,000 and $291,000, as of September 30, 2018 and December 31, 2017, respectively.

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Securitized Debt Obligations, Net

9 Months Ended

Sep. 30, 2018

Text Block [Abstract]

Securitized Debt Obligations, Net

7. SECURITIZED DEBT OBLIGATIONS, NET

We have financed a pool of our loans through a collateralized loan obligation, or the CLO, and have also financed one of our loans through a single asset securitization vehicle, or the 2017 Single Asset Securitization. The CLO and the 2017 Single Asset Securitization have issued securitized debt obligations that are non-recourse to us. Both the CLO and the 2017 Single Asset Securitization are consolidated in our financial statements. Refer to Note 15 for further discussion of our CLO and 2017 Single Asset Securitization.

The following tables detail our securitized debt obligations ($ in thousands):

	September 30, 2018
Securitized Debt Obligations	Count		Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Term(2)
Collateralized Loan Obligation
Collateral assets		28	$	1,000,000	$	1,000,000		6.09	%		Feb. 2022
Financing provided		1		817,500		809,944		L+1.74	%		June 2035
2017 Single Asset Securitization
Collateral assets(3)		1		678,963		675,437		L+3.60	%		June 2023
Financing provided		1		474,620		474,418		L+1.65	%		June 2033
Total
Collateral assets		29	$	1,678,963	$	1,675,437		6.00	%
Financing provided(4)		2	$	1,292,120	$	1,284,362		L+1.71	%
	December 31, 2017
Securitized Debt Obligations	Count		Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Term(2)
Collateralized Loan Obligation
Collateral assets		31	$	1,000,000	$	1,000,000		5.16	%		Nov. 2021
Financing provided		1		817,500		808,083		L+1.76	%		June 2035
2017 Single Asset Securitization
Collateral assets(3)		1		656,406		652,880		L+3.60	%		June 2023
Financing provided		1		474,620		474,328		L+1.94	%		June 2033
Total
Collateral assets		32	$	1,656,406	$	1,652,880		5.17	%
Financing provided(4)		2	$	1,292,120	$	1,282,411		L+1.83	%

(1) As of September 30, 2018, 98% of our loans financed by securitized debt obligations earned a floating rate of interest. As of December 31, 2017, 98% of our loans financed by securitized debt obligations earned a floating rate of interest. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, purchase discounts, and accrual of exit fees. All-in yield for the total portfolio assume applicable floating benchmark rates for weighted-average calculation.

(2) Loan term represents weighted-average final maturity, assuming all extension options are exercised by the borrower. Repayments of securitized debt obligations are tied to timing of the related collateral loan asset repayments. The term of these obligations represents the rated final distribution date of the securitizations.

(3) The collateral assets for the 2017 Single Asset Securitization include the total loan amount, of which we securitized $500.0 million.

(4) During the three and nine months ended September 30, 2018, we recorded $12.5 million and $35.6 million of interest expense, respectively, related to our securitized debt obligations. During both the three and nine months ended September 30, 2017, we recorded $3.8 million of interest expense related to our securitized debt obligations.

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Convertible Notes, Net

9 Months Ended

Sep. 30, 2018

Text Block [Abstract]

Convertible Notes, Net

8. CONVERTIBLE NOTES, NET

As of September 30, 2018, the following convertible senior notes, or Convertible Notes, were outstanding ($ in thousands):

Convertible Notes Issuance	Face Value		Coupon Rate			All-in Cost(1)			Conversion Rate(2)		Maturity
November 2013	$	172,328		5.25	%		5.87	%		36.5472		December 1, 2018
May 2017		402,500		4.38	%		4.85	%		28.0324		May 5, 2022
March 2018		220,000		4.75	%		5.33	%		27.6052		March 15, 2023

(1)

Includes issuance costs that are amortized through interest expense over the life of the Convertible Notes using the effective interest method.

(2)

Represents the shares of class A common stock per $1,000 principal amount of Convertible Notes, which is equivalent to a conversion price of $27.36, $35.67, and $36.23 per share of class A common stock, respectively, for the November 2013, May 2017, and March 2018 convertible notes. As a result of exceeding the cumulative dividend threshold, as defined in the November 2013 convertible notes supplemental indenture, the conversion rate on the November 2013 convertible notes was most recently adjusted on March 28, 2018 from the prior conversion rate of 36.1380 shares of class A common stock per $1,000 principal amount of convertible notes, which was equivalent to a conversion price of $27.67 per share of class A common stock. Pursuant to the terms of the November 2013 supplemental indenture, the conversion rate will be adjusted to 36.8161 on the first day of any future observation period related to a conversion of the November 2013 convertible notes to account for the dividends paid on our class A common stock on July 16, 2018 and October 15, 2018. The cumulative dividend threshold as defined in the respective May 2017 and March 2018 convertible notes supplemental indentures have not been exceeded as of September 30, 2018.

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, January 31, 2022, and December 14, 2022 for the November 2013, May 2017, and March 2018 convertible notes, respectively, 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. We may not redeem the Convertible Notes prior to maturity. The last reported sale price of our class A common stock of $33.51 on September 28, 2018, the last trading day in the quarter ended September 30, 2018, was greater than the per share conversion price of the November 2013 convertible notes but less than the per share conversion price of the May 2017 and March 2018 convertible notes. We have the intent and ability to settle each series of the Convertible Notes in cash and, as a result, the Convertible Notes did not have any impact on our diluted earnings per share. During the nine months ended September 30, 2018, holders of $172,000 of our November 2013 convertible notes elected to convert their notes pursuant to the terms of the November 2013 convertible notes supplemental indenture. The conversions were settled entirely in cash.

Upon our issuance of the November 2013 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 November 2013 convertible notes issuance is 7.16% per annum.

Upon our issuance of the May 2017 convertible notes, we recorded a $979,000 discount based on the implied value of the conversion option and an assumed effective interest rate of 4.57%, as well as $8.4 million of initial debt discount and issuance costs. Including the amortization of the discount and issuance costs, our total cost of the May 2017 convertible notes issuance is 4.91% per annum.

Upon our issuance of the March 2018 convertible notes, we recorded a $1.5 million discount based on the implied value of the conversion option and an assumed effective interest rate of 5.25%, as well as $5.2 million of initial debt discount and issuance costs. Including the amortization of the discount and issuance costs, our total cost of the March 2018 convertible notes issuance is 5.49% per annum.

The following table details the net book value of our Convertible Notes on our consolidated balance sheets ($ in thousands):

	September 30, 2018			December 31, 2017
Face value	$	794,828		$	575,000
Unamortized discount		(12,956	)		(10,279	)
Deferred financing costs		(921	)		(810	)
Net book value	$	780,951		$	563,911

The following table details our interest expense related to the Convertible Notes ($ in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Cash coupon	$	9,277	$	6,247	$	25,333	$	12,732
Discount and issuance cost amortization		1,535		1,202		4,242		2,869
Total interest expense	$	10,812	$	7,449	$	29,575	$	15,601

Accrued interest payable for the Convertible Notes was $10.8 million and $3.7 million as of September 30, 2018, and December 31, 2017, respectively. Refer to Note 2 for additional discussion of our accounting policies for the Convertible Notes.

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Derivative Financial Instruments

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

9. DERIVATIVE FINANCIAL INSTRUMENTS

The sole objective of our use of derivative financial instruments is to minimize the risks and/or costs associated with our investments and/or financing transactions. These derivatives may or may not qualify as net investment, cash flow, or fair value hedges under the hedge accounting requirements of ASC 815 – “Derivatives and Hedging.” Derivatives not designated as hedges are not speculative and are used to manage our exposure to interest rate movements and other identified risks. For more information on the accounting for designated and non-designated hedges, refer to Note 2.

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

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 foreign currency forward contracts to protect the value or fix the amount of certain investments or cash flows in terms of the U.S. dollar.

The following table details our outstanding foreign exchange derivatives that were designated as net investment hedges of foreign currency risk (notional amount in thousands):

September 30, 2018				December 31, 2017
Foreign Currency Derivatives	Number of Instruments	Notional Amount		Foreign Currency Derivatives	Number of Instruments	Notional Amount
Sell AUD Forward	3	A$	305,000	Sell GBP Forward	1	£	112,700
Sell EUR Forward	1	€	185,000	Sell CAD Forward	1	C$	95,100
Sell GBP Forward	1	£	79,100
Sell CAD Forward	1	C$	71,600

Cash Flow Hedges of Interest Rate Risk

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 following tables detail our outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (notional amount in thousands):

September 30, 2018
Interest Rate	Number of Instruments	Notional Amount		Strike	Index	Wtd.-Avg. Maturity (Years)
Interest Rate Swaps	4	C$	107,822	1.0%	CDOR	0.7
Interest Rate Caps	9	$	204,248	2.4%	USD LIBOR	0.7
Interest Rate Caps	3	C$	22,765	2.0%	CDOR	0.4
December 31, 2017
Interest Rate	Number of Instruments	Notional Amount		Strike	Index	Wtd.-Avg. Maturity (Years)
Interest Rate Swaps	4	C$	108,094	1.0%	CDOR	1.4
Interest Rate Caps	9	$	204,248	2.4%	USD LIBOR	1.5
Interest Rate Caps	3	C$	23,370	2.0%	CDOR	0.3

Amounts reported in accumulated other comprehensive income (loss) related to derivatives will be reclassified to interest expense as interest payments are made on our floating rate debt. During the twelve months following September 30, 2018, we estimate that an additional $570,000 will be reclassified from accumulated other comprehensive income (loss) as an increase to interest income.

Non-designated Hedges

During the three and nine months ended September 30, 2018, we recorded losses of $51,000 and gains of $94,000, respectively, related to non-designated hedges that were reported as a component of interest expense in our consolidated financial statements. During the three and nine months ended September 30, 2017, we recorded losses of $42,000 and $355,000, respectively.

The following tables summarize our non-designated hedges (notional amount in thousands):

September 30, 2018
Non-designated Hedges	Number of Instruments	Notional Amount
Buy GBP / Sell EUR Forward	1	€	12,857
December 31, 2017
Non-designated Hedges	Number of Instruments	Notional Amount
Buy GBP / Sell EUR Forward	1	€	12,857

Valuation of Derivative Instruments

The following table summarizes the fair value of our derivative financial instruments ($ in thousands):

	Fair Value of Derivatives in an Asset Position(1) as of				Fair Value of Derivatives in a Liability Position(2) as of
	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Derivatives designated as hedging instruments:
Foreign exchange contracts	$	1,514	$	—	$	3,676	$	4,872
Interest rate derivatives		1,042		1,214		—		—
Total	$	2,556	$	1,214	$	3,676	$	4,872
Derivatives not designated as hedging instruments:
Foreign exchange contracts	$	163	$	—	$	—	$	39
Interest rate derivatives		—		—		—		—
Total	$	163	$	—	$	—	$	39
Total Derivatives	$	2,719	$	1,214	$	3,676	$	4,911

(1)	Included in other assets in our consolidated balance sheets.
(2)	Included in 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 Gain (Loss) Recognized in OCI on Derivatives				Location of			Amount of Gain (Loss) Reclassified from Accumulated OCI into Income
Derivatives in Hedging Relationships	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018		Gain (Loss) Reclassified from Accumulated OCI into Income			Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
Net Investment Hedges
Foreign exchange contracts(1)	$	1,763	$	23,782		Interest Expense		$	—	$	—
Cash Flow Hedges
Interest rate derivatives		92		228		Interest Expense	(2)		152		388
Total	$	1,855	$	24,011				$	152	$	388

(1)

During the three and nine months ended September 30, 2018, we received net cash settlements of $7.6 million and $21.0 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.

(2)

During the three months ended September 30, 2018, we recorded total interest and related expenses of $98.0 million, which included a $152,000 expense reduction related to income generated by our cash flow hedges. During the nine months ended September 30, 2018, we recorded total interest and related expenses of $255.7 million, which included a $388,000 expense reduction related to income generated by our cash flow hedges.

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 September 30, 2018, we were in a net asset position with one of our derivative counterparties and in a net liability position with our other derivative counterparty, and posted collateral of $7.4 million under these derivative contracts. As of December 31, 2017, we were in a net asset position with one of our derivative counterparties and in a net liability position with our other derivative counterparty, and posted collateral of $4.1 million under these derivative contracts.

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Equity

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Equity

10. EQUITY

Stock and Stock Equivalents

Authorized Capital

As of September 30, 2018, 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 September 30, 2018.

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.

The following table details our issuance of class A common stock during the nine months ended September 30, 2018 ($ in thousands, except share and per share data):

	Class A Common Stock Offerings				2018 Total / Wtd. Avg.
	August 2018		At-the-Market  2018(1)
Shares issued		6,900,000		4,583,135		11,483,135
Share issue price(2)	$	32.60	$	32.73	$	32.65
Net proceeds(3)	$	222,275	$	147,512	$	369,787

(1)	Issuance represents shares issued under our at-the-market program, with a weighted-average issue price of $32.73.
(2)	Represents price per share paid by the underwriters or sales agents, as applicable. Net proceeds after underwriting or sales discounts and commissions were $32.26 and $32.24 per share for our August offering and at-the-market program, respectively.
(3)	Net proceeds represents proceeds received from the underwriters less applicable transaction costs.

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:

	Nine Months Ended September 30,
Common Stock Outstanding(1)	2018		2017
Beginning balance		108,081,077		94,709,290
Issuance of class A common stock(2)		11,484,414		971
Issuance of restricted class A common stock, net		300,921		286,773
Issuance of deferred stock units		23,730		20,560
Ending balance		119,890,142		95,017,594

(1)	Includes deferred stock units held by members of our board of directors of 220,947 and 189,587 as of September 30, 2018 and 2017, respectively.
(2)	Includes 1,279 and 971 shares issued under our dividend reinvestment program during the nine months ended September 30, 2018 and 2017, 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 and nine months ended September 30, 2018, we issued 403 shares and 1,279 shares, respectively, of class A common stock under the dividend reinvestment component of the plan compared to 428 shares and 971 shares for the same periods in 2017. As of September 30, 2018, a total of 9,995,647 shares of class A common stock remained 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. On July 29, 2016, in connection with filing a new universal shelf registration statement on Form S-3, we entered into amendments to each of the ATM Agreements. 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. During the nine months ended September 30, 2018, we issued and sold 4,583,135 shares of class A common stock under the ATM Agreements, with net proceeds totaling $147.5 million. We did not sell any shares of our class A common stock under the ATM Agreements during the nine months ended September 30, 2017. As of September 30, 2018, sales of our class A common stock with an aggregate sales price of $38.6 million remained 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 September 14, 2018, we declared a dividend of $0.62 per share, or $74.2 million, that was paid on October 15, 2018, to stockholders of record as of September 28, 2018. The following table details our dividend activity ($ in thousands, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Dividends declared per share of common stock	$	0.62	$	0.62	$	1.86	$	1.86
Total dividends declared	$	74,195	$	58,793	$	210,369	$	176,374

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				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Net income(1)	$	78,165	$	57,722	$	211,436	$	159,741
Weighted-average shares outstanding, basic and diluted		116,203,140		95,013,087		111,251,864		95,004,188
Per share amount, basic and diluted	$	0.67	$	0.61	$	1.90	$	1.68

(1)   Represents net income attributable to Blackstone Mortgage Trust, Inc.

Other Balance Sheet Items

Accumulated Other Comprehensive Loss

As of September 30, 2018, total accumulated other comprehensive loss was $32.8 million, primarily representing (i) $87.1 million of cumulative unrealized currency translation adjustments on assets and liabilities denominated in foreign currencies and (ii) an offsetting $54.3 million of net realized and unrealized gains related to changes in the fair value of derivative instruments. As of December 31, 2017, total accumulated other comprehensive loss was $29.7 million, primarily representing (i) $60.3 million of cumulative unrealized currency translation adjustments on assets and liabilities denominated in foreign currencies and (ii) an offsetting $30.6 million of net realized and unrealized gains 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 our Multifamily Joint Venture that are not owned by us. A portion of our Multifamily Joint Venture’s consolidated equity and results of operations are allocated to these non-controlling interests based on their pro rata ownership of our Multifamily Joint Venture. As of September 30, 2018, our Multifamily Joint Venture’s total equity was $48.1 million, of which $40.9 million was owned by us, and $7.2 million was allocated to non-controlling interests. As of December 31, 2017, our Multifamily Joint Venture’s total equity was $42.3 million, of which $36.0 million was owned by us, and $6.3 million was allocated to non-controlling interests.

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Other Expenses

9 Months Ended

Sep. 30, 2018

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 a management agreement between our Manager and us, or 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 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 and nine months ended September 30, 2018, we incurred $12.1 million and $34.2 million, respectively, of management fees payable to our Manager, compared to $9.5 million and $28.6 million during the same periods in 2017. In addition, during the three and nine months ended September 30, 2018, we incurred $6.3 million and $22.0 million, respectively, of incentive fees payable to our Manager, compared to $3.7 million and $11.9 million during the same periods in 2017.

As of September 30, 2018 and December 31, 2017 we had accrued management and incentive fees payable to our Manager of $18.4 million and $14.3 million, respectively.

General and Administrative Expenses

General and administrative expenses consisted of the following ($ in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Professional services(1)	$	1,022	$	933	$	3,383	$	2,811
Operating and other costs(1)		687		489		2,026		1,424
Subtotal		1,709		1,422		5,409		4,235
Non-cash compensation expenses
Restricted class A common stock earned		6,609		5,819		20,113		17,496
Director stock-based compensation		125		125		375		313
Subtotal		6,734		5,944		20,488		17,809
Total BXMT expenses		8,443		7,366		25,897		22,044
Other expenses		—		53		—		175
Total general and administrative expenses	$	8,443	$	7,419	$	25,897	$	22,219

(1)   During the three and nine months ended September 30, 2018, we recognized an aggregate $77,000 and $302,000, respectively, of expenses related to our Multifamily Joint Venture. During both the three and nine months ended September 30, 2017, we recognized an aggregate $112,000 of expenses related to our Multifamily venture.

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Income Taxes

9 Months Ended

Sep. 30, 2018

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 September 30, 2018 and December 31, 2017, we were in compliance with all REIT requirements.

Securitization transactions could result in the creation of taxable mortgage pools for federal income tax purposes. As a REIT, so long as we own 100% of the equity interests in a taxable mortgage pool, we generally would not be adversely affected by the characterization of the securitization as a taxable mortgage pool. Certain categories of stockholders, however, such as foreign stockholders eligible for treaty or other benefits, stockholders with net operating losses, and certain tax-exempt stockholders that are subject to unrelated business income tax, or UBTI, could be subject to increased taxes on a portion of their dividend income from us that is attributable to the taxable mortgage pool. We currently own no UBTI producing assets and we do not intend to purchase or generate assets that produce UBTI distributions in the future.

During the three and nine months ended September 30, 2018, we recorded a current income tax provision of $48,000 and $272,000, respectively, primarily related to activities of our taxable REIT subsidiaries and various state and local taxes. During the three and nine months ended September 30, 2017, we recorded a current income tax provision of $83,000 and $265,000, respectively. We did not have any deferred tax assets or liabilities as of September 30, 2018 or December 31, 2017.

Effective January 1, 2018, under legislation from the Tax Cuts and Jobs Act of 2017, the maximum U.S. federal corporate income tax rate was reduced from 35% to 21%. Accordingly, to the extent that the activities of our taxable REIT subsidiaries generate taxable income in future periods, they may be subject to lower U.S. federal income tax rates.

We have net operating losses, or NOLs, generated by our predecessor business that may be carried forward and utilized in current or future periods. As a result of our issuance of 25,875,000 shares of class A common stock in May 2013, the availability of our NOLs 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, 2017, we had estimated NOLs of $159.0 million that will expire in 2029, unless they are utilized by us prior to expiration.

As of September 30, 2018, tax years 2015 through 2017 remain subject to examination by taxing authorities.

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Stock-Based Incentive Plans

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Incentive Plans

13. STOCK-BASED INCENTIVE PLANS

We are externally managed by our Manager and do not currently have any employees. However, as of September 30, 2018, 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 or available to be awarded under nine benefit plans as of September 30, 2018: (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; (v) our 2013 manager incentive plan, or 2013 Manager Plan; (vi) our 2016 stock incentive plan, or 2016 Plan; (vii) our 2016 manager incentive plan, or 2016 Manager Plan; (viii) our 2018 stock incentive plan, or 2018 Plan; and (ix) our 2018 manager incentive plan, or 2018 Manager Plan. We refer to our 1997 Plan, our 2007 Plan, our 2011 Plan, our 2013 Plan, our 2013 Manager Plan, our 2016 Plan, and our 2016 Manager Plan, collectively, as our Expired Plans and we refer to our 2018 Plan and 2018 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 5,000,000 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 September 30, 2018, we have not granted any shares 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 Common Stock			Weighted-Average Grant Date Fair Value Per Share
Balance as of December 31, 2017		1,484,175		$	30.61
Granted		318,741			31.83
Vested		(404,241	)		28.89
Forfeited		(17,820	)		30.44
Balance as of September 30, 2018		1,380,855		$	31.40

These shares generally vest in installments over a three-year period, pursuant to the terms of the respective award agreements and the terms of the Current Plans. The 1,380,855 shares of restricted class A common stock outstanding as of September 30, 2018 will vest as follows: 448,474 shares will vest in 2018; 616,168 shares will vest in 2019; and 316,213 shares will vest in 2020. As of September 30, 2018, total unrecognized compensation cost relating to nonvested share-based compensation arrangements was $33.9 million based on the closing price of our class A common stock of $31.43 on June 29, 2018, the last trading day prior to our adoption of ASU 2018-07. This cost is expected to be recognized over a weighted average period of 1.0 years from September 30, 2018. The compensation cost of our share-based compensation arrangements for awards granted after our adoption of ASU 2018-07 will be a fixed amount determined based on the grant date fair value of shares granted. Refer to Note 2 for additional discussion on our adoption of ASU 2018-07.

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Fair Values

9 Months Ended

Sep. 30, 2018

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):

	September 30, 2018								December 31, 2017
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Derivatives	$	—	$	2,719	$	—	$	2,719	$	—	$	1,214	$	—	$	1,214
Liabilities
Derivatives	$	—	$	3,676	$	—	$	3,676	$	—	$	4,911	$	—	$	4,911

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 book value, face amount, and fair value of the financial instruments described in Note 2 ($ in thousands):

	September 30, 2018						December 31, 2017
	Book		Face		Fair		Book		Face		Fair
	Value		Amount		Value		Value		Amount		Value
Financial assets
Cash and cash equivalents	$	86,987	$	86,987	$	86,987	$	69,654	$	69,654	$	69,654
Restricted cash		—		—		—		32,864		32,864		32,864
Loans receivable, net		12,176,516		12,260,103		12,261,013		10,056,732		10,108,226		10,112,331
Debt securities held-to-maturity(1)		96,050		99,000		97,607		—		—		—
Financial liabilities
Secured debt agreements, net		6,841,759		6,862,256		6,862,256		5,273,855		5,290,536		5,290,536
Loan participations sold, net		81,044		81,170		81,170		80,415		80,706		80,706
Securitized debt obligations, net		1,284,362		1,292,120		1,297,032		1,282,412		1,292,120		1,292,589
Convertible notes, net		780,951		794,828		832,407		563,911		575,000		610,201

(1)   Included in other assets on our consolidated balance sheets.

Estimates of fair value for cash and cash equivalents, restricted cash, and convertible notes are measured using observable, quoted market prices, or Level 1 inputs. Estimates of fair value for debt securities held-to-maturity and securitized debt obligations are measured using observable, quoted market prices, in inactive markets, or Level 2 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.

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Variable Interest Entities

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Variable Interest Entities

15. VARIABLE INTEREST ENTITIES

Consolidated Variable Interest Entities

We have financed a portion of our loans through the CLO and the 2017 Single Asset Securitization, both of which are VIEs. We are the primary beneficiary and consolidate the CLO and the 2017 Single Asset Securitization on our balance sheet as we (i) control the relevant interests of the CLO and the 2017 Single Asset Securitization that give us power to direct the activities that most significantly affect the CLO and the 2017 Single Asset Securitization, and (ii) have the right to receive benefits and obligation to absorb losses of the CLO and the 2017 Single Asset Securitization through the subordinate interests we own.

The following table details the assets and liabilities of our consolidated CLO and 2017 Single Asset Securitization VIEs ($ in thousands):

	September 30, 2018		December 31, 2017
Assets:
Loans receivable, net	$	1,500,000	$	1,500,000
Other assets		4,899		2,407
Total assets	$	1,504,899	$	1,502,407
Liabilities:
Securitized debt obligations, net	$	1,284,362	$	1,282,412
Other liabilities		1,869		1,379
Total liabilities	$	1,286,231	$	1,283,791

Assets held by these VIEs are restricted and can be used only to settle obligations of the VIEs, including the subordinate interests owned by us. The liabilities of these VIEs are non-recourse to us and can only be satisfied from the assets of the VIEs. The consolidation of these VIEs results in an increase in our gross assets, liabilities, interest income and interest expense, however it does not affect our stockholders’ equity or net income.

Non-Consolidated Variable Interest Entities

In the third quarter of 2018, we contributed a $517.5 million loan to the $1.0 billion 2018 Single Asset Securitization, which is a VIE, and invested in the related $99.0 million subordinate risk retention position. We are not the primary beneficiary of the VIE because we do not have the power to direct the activities that most significantly affect the VIE’s economic performance and, therefore, do not consolidate the 2018 Single Asset Securitization on our balance sheet. We have classified the subordinate risk retention position as a held-to-maturity debt security that is included in other assets on our consolidated balance sheets. We are not obligated to provide, have not provided, and do not intend to provide, financial support to the 2018 Single Asset Securitization, and therefore, our maximum exposure to loss is limited to our book value of $96.1 million. Refer to Note 16 for further details of this transaction.

We are not obligated to provide, have not provided, and do not intend to provide financial support to these consolidated and non-consolidated VIEs.

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Transactions with Related Parties

9 Months Ended

Sep. 30, 2018

Related Party Transactions [Abstract]

Transactions with Related Parties

16. TRANSACTIONS WITH RELATED PARTIES

We are managed by our Manager pursuant to the Management Agreement, the current term of which expires on December 19, 2018, and will be automatically renewed for a one-year term upon such date and each anniversary thereafter unless earlier terminated.

As of September 30, 2018 and December 31, 2017, our consolidated balance sheet included $18.4 million and $14.3 million of accrued management and incentive fees payable to our Manager, respectively. During the three and nine months ended September 30, 2018, we paid management and incentive fees of $22.4 million and $52.2 million, respectively, to our Manager, compared to $14.4 million and $40.1 million during the same periods of 2017. In addition, during the three and nine months ended September 30, 2018, we reimbursed our Manager for expenses incurred on our behalf of $167,000 and $572,000, respectively, compared to $59,000 and $325,000 during the same periods of 2017.

As of September 30, 2018, our Manager held 675,333 shares of unvested restricted class A common stock, which had an aggregate grant date fair value of $21.2 million, and vest in installments over three years from the date of issuance. During the three and nine months ended September 30, 2018, we recorded non-cash expenses related to shares held by our Manager of $3.2 million and $9.6 million, respectively, compared to $2.9 million and $8.7 million during the same periods of 2017. We did not issue any shares of restricted class A common stock to our Manager during the nine months ended September 30, 2018 or 2017, respectively. Refer to Note 13 for further details on our restricted class A common stock.

An affiliate of our Manager is the special servicer of the CLO. This affiliate did not earn any special servicing fees related to the CLO during the nine months ended September 30, 2018 or 2017.

In March of 2018, we originated €1.0 billion of a total €7.3 billion senior term facility, or the Senior Term Facility, for the acquisition of a portfolio of Spanish real estate assets and a Spanish real estate management and loan servicing company by a joint venture between Banco Santander S.A. and certain Blackstone-advised investment vehicles. These investment vehicles own 51% of the joint venture, and we will forgo all non-economic rights under the Senior Term Facility, including voting rights, so long as Blackstone-advised investment vehicles control the joint venture. The Senior Term Facility was negotiated by the joint venture with third-party investment banks without our involvement, and our 14% interest in the Senior Term Facility was made on such market terms.

In the first quarter of 2018, we originated a $330.0 million senior loan, the proceeds of which were used by the borrower to repay an existing loan owned by a Blackstone-advised investment vehicle.

In the second quarter of 2018, we acquired from an unaffiliated third-party a 50% interest in a $1.0 billion senior loan to a borrower that is partially owned by a Blackstone-advised investment vehicle. In the third quarter of 2018, we contributed this loan to the 2018 Single Asset Securitization and invested in the related subordinate risk retention position. We will forgo all non-economic rights under the loan, including voting rights, so long as Blackstone-advised investment vehicles own the borrower above a certain threshold. Refer to Note 15 for further details on this transaction.

During the nine months ended September 30, 2018 and 2017, we originated three loans and five loans, respectively, whereby each respective borrower engaged an affiliate of our Manager to act as title insurance agent in connection with each transaction. We did not incur any expenses or receive any revenues as a result of these transactions.

During the three and nine months ended September 30, 2018, we incurred $90,000 and $384,000, respectively, of expenses for various administrative, compliance, and capital market data services to third-party service providers that are affiliates of our Manager, compared to $87,000 and $254,000 during the same periods of 2017.

In July 2018, in a fully subscribed offering totaling $1.0 billion, certain Blackstone-advised investment vehicles purchased, in the aggregate, $116.1 million of securitized debt obligations issued by the 2018 Single Asset Securitization. In June 2017, in a fully subscribed offering totaling $474.6 million, certain Blackstone-advised investment vehicles purchased, in the aggregate, $72.9 million of securitized debt obligations issued by the 2017 Single Asset Securitization. These investments by the Blackstone-advised investment vehicles represented minority participations in any individual tranche and were purchased by the Blackstone-advised investment vehicles from third-party investment banks on market terms negotiated by the majority third-party investors.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

17. COMMITMENTS AND CONTINGENCIES

Unfunded Commitments Under Loans Receivable

As of September 30, 2018, we had unfunded commitments of $3.0 billion related to 80 loans receivable, which amounts will generally be funded to finance our borrowers’ construction or development of real estate-related assets, capital improvements of existing assets, or lease-related expenditures. These commitments will generally be funded over the term of each loan, subject in certain cases to an expiration date.

Principal Debt Repayments

Our contractual principal debt repayments as of September 30, 2018 were as follows ($ in thousands):

			Payment Timing
	Total Obligation		Less Than 1 Year		1 to 3 Years		3 to 5 Years		More Than 5 Years
Principal repayments under secured debt agreements(1)	$	6,862,256	$	273,254	$	2,393,008	$	4,112,794	$	83,200
Principal repayments of convertible notes(2)		794,828		172,328		—		622,500		—
Total(3)	$	7,657,084	$	445,582	$	2,393,008	$	4,735,294	$	83,200

(1)	The allocation of repayments under our secured debt agreements is based on the earlier of (i) the maturity date of each facility, or (ii) the maximum maturity date of the collateral loans, assuming all extension options are exercised by the borrower.
(2)	Reflects the outstanding principal balance of convertible notes, excluding any potential conversion premium. Refer to Note 8 for further details on our convertible notes.
(3)	As of September 30, 2018, the total does not include $81.2 million of loan participations sold, $466.7 million of non-consolidated senior interests, and $1.3 billion of securitized debt obligations, as the satisfaction of these liabilities will not require cash outlays from us.

Litigation

From time to time, we may be involved in various claims and legal actions arising in the ordinary course of business. As of September 30, 2018, we were not involved in any material legal proceedings.

Board of Directors’ Compensation

As of September 30, 2018, of the eight members of our board of directors, our five independent directors are entitled to annual compensation of $175,000 each, $75,000 of which will be paid in the form of cash and $100,000 in the form of deferred stock units. The other three board members, including our chairman and our chief executive officer, serve as directors with no compensation. In addition, (i) the chair of our audit committee receives additional annual cash compensation of $20,000, (ii) the other members of our audit committee receive additional annual cash compensation of $10,000, and (iii) the chairs of each of our compensation and corporate governance committees receive additional annual cash compensation of $10,000.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2018

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.

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.

In the third quarter of 2018, we contributed a loan to a single asset securitization vehicle, or the 2018 Single Asset Securitization, which is a VIE, and invested in the related subordinate risk retention position. We are not the primary beneficiary of the VIE because we do not have the power to direct the activities that most significantly affect the VIE’s economic performance and, therefore, do not consolidate the 2018 Single Asset Securitization on our balance sheet. We have classified the subordinate risk retention position as a held-to-maturity debt security that is included in other assets on our consolidated balance sheets. Refer to Note 15 for additional discussion of our VIEs.

In April 2017, we entered into a joint venture, or our Multifamily Joint Venture, with Walker & Dunlop Inc. to originate, hold, and finance multifamily bridge loans. Pursuant to the terms of the agreements governing the joint venture, Walker & Dunlop contributed 15% of the venture’s equity capital and we contributed 85%. We consolidate the Multifamily Joint Venture as we have a controlling financial interest. The non-controlling interests included on our consolidated balance sheets represent the equity interests in our Multifamily Joint Venture that are owned by Walker & Dunlop. A portion of our Multifamily Joint Venture’s consolidated equity and results of operations are allocated to these non-controlling interests based on Walker & Dunlop’s pro rata ownership of our Multifamily Joint Venture.

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 portfolio and debt securities 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 and recorded over the term of the loan or debt security 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, Cash Equivalents, and Restricted Cash

Cash, Cash Equivalents, and Restricted Cash

Cash and cash equivalents represent cash held in banks 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 represents cash held in a segregated bank account related to a letter of credit.

The following table provides a reconciliation of cash, cash equivalents, and restricted cash in our consolidated balance sheets to the total amount shown in our consolidated statements of cash flows ($ in thousands):

	September 30, 2018		September 30, 2017
Cash and cash equivalents	$	86,987	$	61,221
Restricted cash		—		32,864
Total cash, cash equivalents, and restricted cash shown in our consolidated statements of cash flows	$	86,987	$	94,085

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 it 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: A loan that has a risk of realizing a principal loss.
5 -	Impaired/Loss Likely: A loan that has a very high risk of realizing a principal loss or has otherwise incurred a principal loss.

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 accretes from its allocated purchase price to its expected collection value over the life of the loan, consistent with the other loans in our portfolio.

Debt Securities Held-to-Maturity

Debt Securities Held-to-Maturity

We classify our debt securities as held-to-maturity, as we have the intent and ability to hold these securities until maturity. We include our debt securities in other assets on our consolidated balance sheets at amortized cost.

If, based on current information and events, there is an adverse change in cash flows expected to be collected from the cash flows previously projected for one of our debt securities, an other-than-temporary impairment is deemed to have occurred. A change in expected cash flows is considered adverse if the present value of the revised cash flows (taking into consideration both the timing and amount of cash flows expected to be collected), discounted using the debt security’s current yield, is less than the present value of the previously estimated remaining cash flows. If an other-than-temporary impairment is considered to have occurred, the debt security is written down to fair value. The total other-than-temporary impairment is bifurcated into (i) the amount related to expected credit losses, and (ii) the amount related to fair value adjustments in excess of expected credit losses. The other-than-temporary impairment related to expected credit losses is calculated by comparing the amortized cost basis of the security to the present value of cash flows expected to be collected, discounted at the security’s current yield, and is recognized in earnings in the consolidated statement of operations. The remaining other-than-temporary impairment that is not related to expected credit losses is recognized in other comprehensive income (loss). A portion of other-than-temporary impairments recognized through earnings is accreted back to the amortized cost basis of the security through interest income, while amounts recognized through other comprehensive income (loss) are amortized over the life of the security with no impact on earnings.

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 non-designated hedge. For all derivatives other than those designated as non-designated hedges, we formally document our hedge relationships and designation at the contract’s 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 and the changes in fair value of the instrument are included in net income prospectively. Changes in the fair value of our derivative instruments that qualify as hedges are reported as a component of accumulated other comprehensive income (loss) on our consolidated financial statements. Deferred gains and losses are reclassified out of accumulated other comprehensive income (loss) and into net income in the same period or periods during which the hedged transaction affects earnings, and are presented in the same line item as the earnings effect of the hedged item. For cash flow hedges, this is typically when the periodic swap settlements are made, while for net investment hedges, this occurs when the hedged item is sold or substantially liquidated. To the extent a derivative does not qualify for hedge accounting and is deemed a non-designated hedge, the changes in its fair value are included in net income concurrently.

Secured Debt Agreements

Secured Debt Agreements

Where applicable, 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.

Senior Loan Participations

Senior Loan Participations

In certain instances, we finance our loans through the non-recourse syndication of a senior loan interest to a third-party. Depending on the particular structure of the syndication, the senior loan interest may remain on our GAAP balance sheet or, in other cases, the sale will be recognized and the senior loan interest will no longer be included in our consolidated financial statements. When these sales are not recognized under GAAP we reflect the transaction by recording a loan participations sold liability on our consolidated balance sheet, however this gross presentation does not impact stockholders’ equity or net income. When the sales are recognized, our balance sheet only includes our remaining subordinate loan and not the non-consolidated senior interest we sold.

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 respective issuance dates based on our nonconvertible debt borrowing rate. The equity component of each series of our 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 such 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 such 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 of the FASB, 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 the 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, which 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 and cash equivalents approximates fair value.

• Restricted cash: The carrying amount of restricted cash approximates fair value.

• Loans receivable, net: The fair values of these loans were estimated by our Manager based on a discounted cash flow methodology, taking into consideration various 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.

• Debt securities held-to-maturity: The fair value of these instruments was estimated by utilizing third-party pricing service providers. In determining the value of a particular investment, pricing service providers may use broker-dealer quotations, reported trades, or valuation estimates from their internal pricing models to determine the reported price.

• Derivative financial instruments: The fair value of our foreign currency and interest rate contracts was estimated 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, net: The fair value of these instruments was estimated based on the rate at which a similar credit facility would currently be priced.

• Loan participations sold, net: The fair value of these instruments was estimated based on the value of the related loan receivable asset.

• Securitized debt obligations, net: The fair value of these instruments was estimated by utilizing third-party pricing service providers. In determining the value of a particular investment, pricing service providers may use broker-dealer quotations, reported trades, or valuation estimates from their internal pricing models to determine the reported price.

• Convertible notes, net: Each series of the convertible notes is actively traded and their fair values were obtained using quoted market prices.

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 individuals employed by an affiliate of our Manager 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 our 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 our 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 (loss).

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 June 2018, the FASB issued ASU 2018-07 “Compensation – Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting,” or ASU 2018-07. ASU 2018-07 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The guidance is intended to align the accounting for such payments to nonemployees with the existing requirements for share-based payments granted to employees. Upon adoption of ASU 2018-07, the cost of our long-term incentive plans will be a fixed amount determined based on the grant date fair value of shares granted, rather than the prior methodology that recognizes a variable cost based on the fair value of such shares as of their vesting dates. ASU 2018-07 is to be adopted through a cumulative-effect adjustment to retained earnings for outstanding share-based payments to nonemployees as of the beginning of the fiscal year in which the guidance is effective. We adopted ASU 2018-07 in the third quarter of 2018 and it did not have an impact on our consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13 “Financial Instruments – Credit Losses – Measurement of Credit Losses on Financial Instruments (Topic 326),” or ASU 2016-13. ASU 2016-13 significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. ASU 2016-13 will replace the “incurred loss” model under existing guidance with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. It also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 and is to be adopted through a cumulative-effect adjustment to retained earnings as of January 1, 2020. While we are currently evaluating the impact ASU 2016-13 will have on our consolidated financial statements, we expect that the adoption will result in an increased amount of provisions for potential loan losses as well as the recognition of such provisions earlier in the lending cycle. We currently do not have any provision for loan losses in our consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” or ASU 2014-09. ASU 2014-09 broadly amends the accounting guidance for revenue recognition. ASU 2014-09 is effective for the first interim or annual period beginning after December 15, 2017, and is to be applied retrospectively. We adopted ASU 2014-09 in the first quarter of 2018 and it did not have a material impact on our consolidated financial statements.

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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash in our consolidated balance sheets to the total amount shown in our consolidated statements of cash flows ($ in thousands):

	September 30, 2018		September 30, 2017
Cash and cash equivalents	$	86,987	$	61,221
Restricted cash		—		32,864
Total cash, cash equivalents, and restricted cash shown in our consolidated statements of cash flows	$	86,987	$	94,085

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Loans Receivable, Net (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Overall Statistics for Loans Receivable Portfolio

The following table details overall statistics for our loans receivable portfolio ($ in thousands):

	September 30, 2018			December 31, 2017
Number of loans		112			110
Principal balance	$	12,260,103		$	10,108,226
Net book value	$	12,176,516		$	10,056,732
Unfunded loan commitments(1)	$	3,046,350		$	1,573,107
Weighted-average cash coupon(2)		5.61	%		5.55	%
Weighted-average all-in yield(2)		5.94	%		5.95	%
Weighted-average maximum maturity (years)(3)		3.8			3.5

(1)	Unfunded commitments will primarily be funded to finance our borrowers’ construction or development of real estate-related assets, capital improvements of existing assets, or lease-related expenditures. These commitments will generally be funded over the term of each loan, subject in certain cases to an expiration date.
(2)	Our floating rate loans are indexed to various benchmark rates, with 83% and 92% of our floating rate loans by principal balance indexed to USD LIBOR as of September 30, 2018 and December 31, 2017, respectively. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, and purchase discounts, as well as the accrual of exit fees. Cash coupon and all-in yield assume applicable floating benchmark rates 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 September 30, 2018, 86% of our loans by principal balance were subject to yield maintenance or other prepayment restrictions and 14% were open to repayment by the borrower without penalty. As of December 31, 2017, 75% of our loans were subject to yield maintenance or other prepayment restrictions and 25% 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 Balance			Deferred Fees / Other Items(1)			Net Book Value
December 31, 2017	$	10,108,226		$	(51,494	)	$	10,056,732
Loan fundings		5,222,803			—			5,222,803
Loan repayments		(2,452,811	)		—			(2,452,811	)
Loan contributed to securitization		(517,500	)		5,498			(512,002	)
Unrealized (loss) gain on foreign currency translation		(100,615	)		678			(99,937	)
Deferred fees and other items		—			(74,111	)		(74,111	)
Amortization of fees and other items		—			35,842			35,842
September 30, 2018	$	12,260,103		$	(83,587	)	$	12,176,516

(1)   Other items primarily consist of purchase discounts or premiums, exit fees, and deferred origination expenses.

Property Type and Geographic Distribution of Properties Securing Loans in Portfolio

The tables below detail the property type and geographic distribution of the properties securing the loans in our portfolio ($ in thousands):

September 30, 2018
Property Type	Number of Loans		Net Book Value		Total Loan Exposure(1)(2)		Percentage of Portfolio
Office		49	$	5,956,675	$	6,006,534		47%
Hotel		15		1,992,889		2,069,818		16
Multifamily		32		1,894,001		1,903,572		15
Spanish Assets		1		1,152,487		1,160,400		9
Retail		4		336,787		337,334		3
Condominium		2		84,429		158,462		1
Other		9		759,248		1,090,711		9
		112	$	12,176,516	$	12,726,831		100%
Geographic Location	Number of Loans		Net Book Value		Total Loan Exposure(1)(2)		Percentage of Portfolio
United States
Northeast		30	$	3,796,633	$	3,830,021		29%
West		25		2,543,743		2,637,582		21
Southeast		18		2,025,381		2,034,852		16
Midwest		8		901,310		906,102		7
Southwest		13		477,809		480,792		4
Northwest		2		141,199		141,630		1
Subtotal		96		9,886,075		10,030,979		78
International
Spain		1		1,152,487		1,160,400		9
United Kingdom		5		492,790		837,688		7
Canada		5		335,957		332,841		3
Australia		2		218,286		220,335		2
Belgium		1		71,494		71,945		1
Germany		1		11,814		65,000		—
Netherlands		1		7,613		7,643		—
Subtotal		16		2,290,441		2,695,852		22
Total		112	$	12,176,516	$	12,726,831		100%

(1)	In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $466.7 million of such non-consolidated senior interests as of September 30, 2018.
(2)	Excludes investment exposure to the $1.0 billion 2018 Single Asset Securitization. See Note 4 for details of the subordinated risk retention interest we own in the 2018 Single Asset Securitization.

December 31, 2017
Property Type	Number of Loans	Net Book Value		Total Loan Exposure(1)		Percentage of Portfolio
Office	53	$	5,773,972	$	5,807,170		53%
Hotel	15		1,830,568		1,905,497		17
Multifamily	25		1,220,423		1,228,959		11
Retail	6		487,473		940,980		8
Condominium	2		142,342		268,751		2
Other	9		601,954		942,251		9
	110	$	10,056,732	$	11,093,608		100%
Geographic Location	Number of Loans	Net Book Value		Total Loan Exposure(1)		Percentage of Portfolio
United States
Northeast	26	$	2,857,948	$	2,871,219		26%
West	29		2,672,069		2,816,276		24
Southeast	17		2,007,202		2,470,992		22
Midwest	9		856,559		862,578		8
Southwest	10		380,204		380,120		3
Northwest	2		283,381		286,221		3
Subtotal	93		9,057,363		9,687,406		86
International
United Kingdom	6		440,317		794,789		7
Canada	7		415,893		412,343		4
Belgium	1		73,779		74,431		1
Germany	1		12,237		67,399		1
Netherlands	2		57,143		57,240		1
Subtotal	17		999,369		1,406,202		14
Total	110	$	10,056,732	$	11,093,608		100%

(1)   In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $985.4 million of such non-consolidated senior interests as of December 31, 2017.

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):

September 30, 2018							December 31, 2017
Risk Rating		Number of Loans	Net Book Value		Total Loan Exposure(1)(2)		Risk Rating		Number of Loans	Net Book Value		Total Loan Exposure(1)
	1	1	$	53,849	$	53,873		1	1	$	31,842	$	31,890
	2	43		4,167,871		4,272,068		2	41		3,512,709		3,521,701
	3	68		7,954,796		8,400,890		3	67		6,491,617		7,519,465
	4	—		—		—		4	1		20,564		20,552
	5	—		—		—		5	—		—		—
		112	$	12,176,516	$	12,726,831			110	$	10,056,732	$	11,093,608

(1) In certain instances, we finance our loans through the non-recourse sale of a senior loan interest that is not included in our consolidated financial statements. See Note 2 for further discussion. Total loan exposure encompasses the entire loan we originated and financed, including $466.7 million and $985.4 million of such non-consolidated senior interests as of September 30, 2018 and December 31, 2017, respectively.

(2) Excludes investment exposure to the $1.0 billion 2018 Single Asset Securitization. See Note 4 for details of the subordinated risk retention interest we own in the 2018 Single Asset Securitization.

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Other Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2018

Text Block [Abstract]

Summary of Components of Other Assets

The following table details the components of our other assets ($ in thousands):

	September 30, 2018		December 31, 2017
Debt securities held-to-maturity(1)	$	96,050	$	—
Accrued interest receivable		45,762		38,573
Collateral deposited under derivative agreements		7,360		4,120
Loan portfolio payments held by servicer(2)		3,902		54,759
Derivative assets		2,719		1,214
Prepaid expenses		151		798
Prepaid taxes		28		31
Other		—		80
Total	$	155,972	$	99,575

(1)	Represents a $99.0 million subordinate risk retention interest in the $1.0 billion 2018 Single Asset Securitization, with a yield to full maturity of L+10.0% and a maximum maturity date of June 9, 2025, assuming all extension options are exercised by the borrower. Refer to Note 15 for additional discussion.
(2)	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.

Summary of Components of Other Liabilities

The following table details the components of our other liabilities ($ in thousands):

	September 30, 2018		December 31, 2017
Accrued dividends payable	$	74,195	$	66,888
Accrued interest payable		23,701		14,162
Accrued management and incentive fees payable		18,368		14,284
Derivative liabilities		3,676		4,911
Accounts payable and other liabilities		3,426		2,125
Secured debt repayments pending servicer remittance(1)		—		38,456
Total	$	123,366	$	140,826

(1)   Represents pending transfers from our third-party loan servicer that were remitted to our banking counterparties during the subsequent remittance cycle.

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Secured Debt Agreements, Net (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of Secured Debt Agreements

The following table details our secured debt agreements ($ in thousands):

	Secured Debt Agreements Borrowings Outstanding
	September 30, 2018			December 31, 2017
Credit facilities	$	4,850,911		$	4,068,249
Asset-specific financings		1,499,286			518,864
GE portfolio acquisition facility		512,059			703,423
Revolving credit agreement		—			—
Total secured debt agreements	$	6,862,256		$	5,290,536
Deferred financing costs(1)		(20,497	)		(16,681	)
Net book value of secured debt	$	6,841,759		$	5,273,855

(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.

Credit Facilities

The following tables detail our credit facilities ($ in thousands):

	September 30, 2018
	Maximum		Credit Borrowings						Collateral
Lender	Facility Size(1)		Potential(2)		Outstanding		Available(2)		Assets(3)
Bank of America	$	1,000,000	$	863,592	$	863,592	$	—	$	1,091,860
Wells Fargo		2,000,000		1,160,678		850,687		309,991		1,577,251
MetLife		1,000,000		737,770		737,770		—		946,933
Barclays		1,000,000		617,360		617,360		—		771,700
Citibank(4)		750,000		576,369		480,129		96,240		730,723
JP Morgan		500,000		435,095		332,909		102,186		564,070
Morgan Stanley(5)		651,550		329,256		278,770		50,486		461,760
Deutsche Bank		500,000		277,247		277,247		—		380,986
Société Générale(6)		464,160		235,229		235,229		—		298,951
Goldman Sachs - Multi. JV(7)		250,000		117,498		117,498		—		148,099
Bank of America - Multi. JV(7)		200,000		59,720		59,720		—		74,650
	$	8,315,710	$	5,409,814	$	4,850,911	$	558,903	$	7,046,983

	December 31, 2017
	Maximum		Credit Borrowings						Collateral
Lender	Facility Size(1)		Potential(2)		Outstanding		Available(2)		Assets(3)
Wells Fargo	$	2,000,000	$	1,289,135	$	1,170,801	$	118,334	$	1,680,325
MetLife		1,000,000		807,164		807,164		—		1,039,231
Bank of America		750,000		573,542		573,542		—		765,049
JP Morgan		500,000		443,496		319,755		123,741		579,218
Société Générale(6)		480,200		300,871		300,871		—		373,181
Deutsche Bank		500,000		295,743		295,743		—		399,203
Citibank(4)		800,125		354,354		240,881		113,473		455,433
Morgan Stanley(5)		675,650		456,344		216,044		240,300		591,168
Bank of America - Multi. JV(7)		200,000		85,560		85,560		—		106,950
Goldman Sachs - Multi. JV(7)		250,000		57,888		57,888		—		75,225
	$	7,155,975	$	4,664,097	$	4,068,249	$	595,848	$	6,064,983

(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)	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 credit facility.
(3)	Represents the principal balance of the collateral assets.
(4)	As of September 30, 2018, the Citibank facility was denominated in U.S. dollars. As of December 31, 2017, the maximum facility size was composed of a $500.0 million facility denominated in U.S. dollars plus a €250.0 million facility, which translated to $300.1 million as of such date.
(5)	As of September 30, 2018 and December 31, 2017, the Morgan Stanley maximum facility size was £500.0 million, which translated to $651.6 million and $675.7 million, respectively.
(6)	As of September 30, 2018 and December 31, 2017, the Société Générale maximum facility size was €400.0 million, which translated to $464.2 million and $480.2 million, respectively.
(7)	These facilities finance the loan investments of our consolidated Multifamily Joint Venture. Refer to Note 2 for additional discussion of our Multifamily Joint Venture.

Summary of Key Terms of Credit Facilities

The following tables outline the key terms of our credit facilities as of September 30, 2018:

Lender	Currency	Guarantee(1)	Margin Call(2)	Term/Maturity
Morgan Stanley	$ /  £ / €	25%	Collateral marks only	March 3, 2020
Goldman Sachs - Multi. JV(3)	$	25%	Collateral marks only	July 12, 2020(4)
JP Morgan	$ /  £	50%	Collateral marks only	January 7, 2021
Bank of America - Multi. JV(3)	$	43%	Collateral marks only	July 19, 2021(5)
Deutsche Bank	$	32%	Collateral marks only	August 9, 2021(6)
Barclays	$	25%	Collateral marks only	March 29, 2023(7)
MetLife	$	50%	Collateral marks only	April 22, 2023(8)
Bank of America	$	50%	Collateral marks only	May 21, 2023(9)
Citibank	$  / £ / €	25%	Collateral marks only	Term matched(10)
Société Générale	$  / £ /  €	25%	Collateral marks only	Term matched(10)
Wells Fargo	$	25%	Collateral marks only	Term matched(10)

(1)	Other than amounts guaranteed based on specific collateral asset types, borrowings under our credit facilities are non-recourse to us.
(2)	Margin call provisions under our credit facilities do not permit valuation adjustments based on capital markets events, and are limited to collateral-specific credit marks.
(3)	These facilities finance the loan investments of our consolidated Multifamily Joint Venture. Refer to Note 2 for additional discussion of our Multifamily Joint Venture.
(4)	Includes a one-year extension option which may be exercised at our sole discretion.
(5)	Includes two one-year extension options which may be exercised at our sole discretion.
(6)	Includes two one-year extension options which may be exercised at our sole discretion.
(7)	Includes four one-year extension options which may be exercised at our sole discretion.
(8)	Includes four one-year extension options which may be exercised at our sole discretion.
(9)	Includes two one-year extension options which may be exercised at our sole discretion.
(10)	These credit 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.

Currency	Potential Borrowings		Outstanding Borrowings(1)		Floating Rate Index	Spread(2)	Advance Rate(3)
$		$  5,024,025		$  4,551,603	1-month USD LIBOR	1.75%	79.2%
€		€       54,869		€       12,100	3-month EURIBOR	2.28%	80.0%
£		£     247,194		£     218,914	3-month GBP LIBOR	1.97%	79.0%
		$  5,409,815		$  4,850,911		1.77%	79.2%

(1)	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 credit facility.
(2)	Represents weighted-average spread over the applicable floating rate index, based on borrowings outstanding.
(3)	Represents weighted-average advance rate based on the approved outstanding principal balance of the collateral assets pledged.

Summary of Asset-Specific Financings

The following tables detail our asset-specific financings ($ in thousands):

	September 30, 2018
Asset-Specific Financings	Count	Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Guarantee(2)		Wtd. Avg. Term(3)
Collateral assets	5	$	1,905,475	$	1,895,094		L+3.61	%		n/a		Sep. 2022
Financing provided(4)	5	$	1,499,286	$	1,492,614		L+1.77	%	$	1,178,874		Sep. 2022
	December 31, 2017
Asset-Specific Financings	Count	Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Guarantee(2)		Wtd. Avg. Term(3)
Collateral assets	6	$	682,259	$	677,296		L+4.76	%		n/a		Dec. 2020
Financing provided(4)	6	$	518,864	$	517,088		L+2.50	%	$	162,475		Dec. 2020

(1)	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, yield/cost includes the amortization of deferred origination fees / financing costs.
(2)	Other than amounts guaranteed on an asset-by-asset basis, borrowings under our asset-specific financings are non-recourse to us.
(3)	The weighted-average term is determined based on the maximum maturity of the corresponding loans, assuming all extension options are exercised by the borrower. Each of our asset-specific financings are term-matched to the corresponding collateral loans.
(4)	As of September 30, 2018 and December 31, 2017, borrowings of $517.8 million and $394.8 million, respectively, under these asset specific financings are cross collateralized with related credit facilities with the same lenders.

The weighted-average outstanding balance of our asset-specific financings was $1.3 billion for the nine months ended September 30, 2018 and $522.5 million for the nine months ended December 31, 2017.

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. The GE portfolio acquisition facility is non-revolving and consists of a single master repurchase agreement providing for asset-specific borrowings for each collateral asset. The following tables detail our asset-specific borrowings related to the GE portfolio acquisition ($ in thousands):

	September 30, 2018
GE Portfolio Acquisition Facility	Count	Principal Balance(1)		Book Value		Wtd. Avg. Yield/Cost(2)			Guarantee(3)		Wtd. Avg. Term(4)
Collateral assets	11	$	662,464	$	664,189		5.92	%		n/a		May 2021
Financing provided	11	$	512,059	$	511,346		L+1.77	%	$	250,000		May 2021
	December 31, 2017
GE Portfolio Acquisition Facility	Count	Principal Balance(1)		Book Value		Wtd. Avg. Yield/Cost(2)			Guarantee(3)		Wtd. Avg. Term(4)
Collateral assets	16	$	906,707	$	911,092		5.74	%		n/a		Jul. 2020
Financing provided	16	$	703,423	$	702,337		L+1.72	%	$	250,000		Jul. 2020

(1)	As of September 30, 2018, this facility provided for $608.7 million of financing, of which $512.1 million was outstanding and an additional $96.6 million was available to finance future loan fundings in the GE portfolio. As of December 31, 2017, this facility provided for $816.3 million of financing, of which $703.4 million was outstanding and an additional $112.9 million was available to finance future loan fundings in the GE portfolio.
(2)	In addition to cash coupon, yield/cost includes the amortization of deferred origination fees / financing costs.
(3)	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.
(4)	The weighted-average term is determined based on the maximum maturity of the corresponding loans, assuming all extension options are exercised by the borrower. Each of our asset-specific financings are term-matched to the corresponding collateral loans.

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Loan Participations Sold, Net (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Summary of Statistics for Loan Participations Sold

The following tables detail our loan participations sold ($ in thousands):

September 30, 2018

Loan Participations Sold

Count

Principal Balance

Book Value

Yield/Cost(1)

Guarantee(2)

Term

Total loan

1

$

106,259

$

105,149

L+6.06

%

n/a

Feb. 2022

Senior participation(3)(4)

1

81,170

81,044

L+4.08

%

n/a

Feb. 2022

December 31, 2017

Loan Participations Sold

Count

Principal Balance

Book Value

Yield/Cost(1)

Guarantee(2)

Term

Total loan

1

$

141,119

$

138,907

L+5.94

%

n/a

Feb. 2022

Senior participation(3)(4)

1

80,706

80,415

L+4.14

%

n/a

Feb. 2022

(1)	Our 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, yield/cost includes the amortization of deferred fees / financing costs.
(2)	As of September 30, 2018 and December 31, 2017, our loan participations sold was non-recourse to us.
(3)	During the three and nine months ended September 30, 2018, we recorded $11.7 million and $15.2 million, respectively, of interest expense related to our loan participations sold. During the three and nine months ended September 30, 2017, we recorded $4.0 million and $9.3 million, respectively, of interest expense related to our loan participations sold.
(4)	The difference between principal balance and book value of loan participations sold is due to deferred financing costs of $126,000 and $291,000, as of September 30, 2018 and December 31, 2017, respectively.

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Securitized Debt Obligations, Net (Tables)

9 Months Ended

Sep. 30, 2018

Text Block [Abstract]

Schedule of Information on Securitized Debt Obligations

The following tables detail our securitized debt obligations ($ in thousands):

	September 30, 2018
Securitized Debt Obligations	Count		Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Term(2)
Collateralized Loan Obligation
Collateral assets		28	$	1,000,000	$	1,000,000		6.09	%		Feb. 2022
Financing provided		1		817,500		809,944		L+1.74	%		June 2035
2017 Single Asset Securitization
Collateral assets(3)		1		678,963		675,437		L+3.60	%		June 2023
Financing provided		1		474,620		474,418		L+1.65	%		June 2033
Total
Collateral assets		29	$	1,678,963	$	1,675,437		6.00	%
Financing provided(4)		2	$	1,292,120	$	1,284,362		L+1.71	%
	December 31, 2017
Securitized Debt Obligations	Count		Principal Balance		Book Value		Wtd. Avg. Yield/Cost(1)			Term(2)
Collateralized Loan Obligation
Collateral assets		31	$	1,000,000	$	1,000,000		5.16	%		Nov. 2021
Financing provided		1		817,500		808,083		L+1.76	%		June 2035
2017 Single Asset Securitization
Collateral assets(3)		1		656,406		652,880		L+3.60	%		June 2023
Financing provided		1		474,620		474,328		L+1.94	%		June 2033
Total
Collateral assets		32	$	1,656,406	$	1,652,880		5.17	%
Financing provided(4)		2	$	1,292,120	$	1,282,411		L+1.83	%

(1) As of September 30, 2018, 98% of our loans financed by securitized debt obligations earned a floating rate of interest. As of December 31, 2017, 98% of our loans financed by securitized debt obligations earned a floating rate of interest. In addition to cash coupon, all-in yield includes the amortization of deferred origination and extension fees, loan origination costs, purchase discounts, and accrual of exit fees. All-in yield for the total portfolio assume applicable floating benchmark rates for weighted-average calculation.

(2) Loan term represents weighted-average final maturity, assuming all extension options are exercised by the borrower. Repayments of securitized debt obligations are tied to timing of the related collateral loan asset repayments. The term of these obligations represents the rated final distribution date of the securitizations.

(3) The collateral assets for the 2017 Single Asset Securitization include the total loan amount, of which we securitized $500.0 million.

(4) During the three and nine months ended September 30, 2018, we recorded $12.5 million and $35.6 million of interest expense, respectively, related to our securitized debt obligations. During both the three and nine months ended September 30, 2017, we recorded $3.8 million of interest expense related to our securitized debt obligations.

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Convertible Notes, Net (Tables)

9 Months Ended

Sep. 30, 2018

Text Block [Abstract]

Summary of Outstanding Convertible Senior Note

As of September 30, 2018, the following convertible senior notes, or Convertible Notes, were outstanding ($ in thousands):

Convertible Notes Issuance	Face Value		Coupon Rate			All-in Cost(1)			Conversion Rate(2)		Maturity
November 2013	$	172,328		5.25	%		5.87	%		36.5472		December 1, 2018
May 2017		402,500		4.38	%		4.85	%		28.0324		May 5, 2022
March 2018		220,000		4.75	%		5.33	%		27.6052		March 15, 2023

(1)

Includes issuance costs that are amortized through interest expense over the life of the Convertible Notes using the effective interest method.

(2)

Represents the shares of class A common stock per $1,000 principal amount of Convertible Notes, which is equivalent to a conversion price of $27.36, $35.67, and $36.23 per share of class A common stock, respectively, for the November 2013, May 2017, and March 2018 convertible notes. As a result of exceeding the cumulative dividend threshold, as defined in the November 2013 convertible notes supplemental indenture, the conversion rate on the November 2013 convertible notes was most recently adjusted on March 28, 2018 from the prior conversion rate of 36.1380 shares of class A common stock per $1,000 principal amount of convertible notes, which was equivalent to a conversion price of $27.67 per share of class A common stock. Pursuant to the terms of the November 2013 supplemental indenture, the conversion rate will be adjusted to 36.8161 on the first day of any future observation period related to a conversion of the November 2013 convertible notes to account for the dividends paid on our class A common stock on July 16, 2018 and October 15, 2018. The cumulative dividend threshold as defined in the respective May 2017 and March 2018 convertible notes supplemental indentures have not been exceeded as of September 30, 2018.

Summary of Details of Net Book Value of Convertible Note

The following table details the net book value of our Convertible Notes on our consolidated balance sheets ($ in thousands):

	September 30, 2018			December 31, 2017
Face value	$	794,828		$	575,000
Unamortized discount		(12,956	)		(10,279	)
Deferred financing costs		(921	)		(810	)
Net book value	$	780,951		$	563,911

Summary of Details about Interest Expense

The following table details our interest expense related to the Convertible Notes ($ in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Cash coupon	$	9,277	$	6,247	$	25,333	$	12,732
Discount and issuance cost amortization		1,535		1,202		4,242		2,869
Total interest expense	$	10,812	$	7,449	$	29,575	$	15,601

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Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

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):

September 30, 2018				December 31, 2017
Foreign Currency Derivatives	Number of Instruments	Notional Amount		Foreign Currency Derivatives	Number of Instruments	Notional Amount
Sell AUD Forward	3	A$	305,000	Sell GBP Forward	1	£	112,700
Sell EUR Forward	1	€	185,000	Sell CAD Forward	1	C$	95,100
Sell GBP Forward	1	£	79,100
Sell CAD Forward	1	C$	71,600

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):

September 30, 2018
Interest Rate	Number of Instruments	Notional Amount		Strike	Index	Wtd.-Avg. Maturity (Years)
Interest Rate Swaps	4	C$	107,822	1.0%	CDOR	0.7
Interest Rate Caps	9	$	204,248	2.4%	USD LIBOR	0.7
Interest Rate Caps	3	C$	22,765	2.0%	CDOR	0.4
December 31, 2017
Interest Rate	Number of Instruments	Notional Amount		Strike	Index	Wtd.-Avg. Maturity (Years)
Interest Rate Swaps	4	C$	108,094	1.0%	CDOR	1.4
Interest Rate Caps	9	$	204,248	2.4%	USD LIBOR	1.5
Interest Rate Caps	3	C$	23,370	2.0%	CDOR	0.3

Summary of Non-designated Hedges

The following tables summarize our non-designated hedges (notional amount in thousands):

September 30, 2018
Non-designated Hedges	Number of Instruments	Notional Amount
Buy GBP / Sell EUR Forward	1	€	12,857
December 31, 2017
Non-designated Hedges	Number of Instruments	Notional Amount
Buy GBP / Sell EUR Forward	1	€	12,857

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 Asset Position(1) as of				Fair Value of Derivatives in a Liability Position(2) as of
	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Derivatives designated as hedging instruments:
Foreign exchange contracts	$	1,514	$	—	$	3,676	$	4,872
Interest rate derivatives		1,042		1,214		—		—
Total	$	2,556	$	1,214	$	3,676	$	4,872
Derivatives not designated as hedging instruments:
Foreign exchange contracts	$	163	$	—	$	—	$	39
Interest rate derivatives		—		—		—		—
Total	$	163	$	—	$	—	$	39
Total Derivatives	$	2,719	$	1,214	$	3,676	$	4,911

(1)	Included in other assets in our consolidated balance sheets.
(2)	Included in 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 Gain (Loss) Recognized in OCI on Derivatives				Location of			Amount of Gain (Loss) Reclassified from Accumulated OCI into Income
Derivatives in Hedging Relationships	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018		Gain (Loss) Reclassified from Accumulated OCI into Income			Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
Net Investment Hedges
Foreign exchange contracts(1)	$	1,763	$	23,782		Interest Expense		$	—	$	—
Cash Flow Hedges
Interest rate derivatives		92		228		Interest Expense	(2)		152		388
Total	$	1,855	$	24,011				$	152	$	388

(1)

During the three and nine months ended September 30, 2018, we received net cash settlements of $7.6 million and $21.0 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.

(2)

During the three months ended September 30, 2018, we recorded total interest and related expenses of $98.0 million, which included a $152,000 expense reduction related to income generated by our cash flow hedges. During the nine months ended September 30, 2018, we recorded total interest and related expenses of $255.7 million, which included a $388,000 expense reduction related to income generated by our cash flow hedges.

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Equity (Tables)

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Summary of Class A Common Stock Issuances

The following table details our issuance of class A common stock during the nine months ended September 30, 2018 ($ in thousands, except share and per share data):

	Class A Common Stock Offerings				2018 Total / Wtd. Avg.
	August 2018		At-the-Market  2018(1)
Shares issued		6,900,000		4,583,135		11,483,135
Share issue price(2)	$	32.60	$	32.73	$	32.65
Net proceeds(3)	$	222,275	$	147,512	$	369,787

(1)	Issuance represents shares issued under our at-the-market program, with a weighted-average issue price of $32.73.
(2)	Represents price per share paid by the underwriters or sales agents, as applicable. Net proceeds after underwriting or sales discounts and commissions were $32.26 and $32.24 per share for our August offering and at-the-market program, respectively.
(3)	Net proceeds represents proceeds received from the underwriters less applicable transaction costs.

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:

	Nine Months Ended September 30,
Common Stock Outstanding(1)	2018		2017
Beginning balance		108,081,077		94,709,290
Issuance of class A common stock(2)		11,484,414		971
Issuance of restricted class A common stock, net		300,921		286,773
Issuance of deferred stock units		23,730		20,560
Ending balance		119,890,142		95,017,594

(1)	Includes deferred stock units held by members of our board of directors of 220,947 and 189,587 as of September 30, 2018 and 2017, respectively.
(2)	Includes 1,279 and 971 shares issued under our dividend reinvestment program during the nine months ended September 30, 2018 and 2017, respectively.

Schedule of Dividend Activity

The following table details our dividend activity ($ in thousands, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Dividends declared per share of common stock	$	0.62	$	0.62	$	1.86	$	1.86
Total dividends declared	$	74,195	$	58,793	$	210,369	$	176,374

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				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Net income(1)	$	78,165	$	57,722	$	211,436	$	159,741
Weighted-average shares outstanding, basic and diluted		116,203,140		95,013,087		111,251,864		95,004,188
Per share amount, basic and diluted	$	0.67	$	0.61	$	1.90	$	1.68

(1)   Represents net income attributable to Blackstone Mortgage Trust, Inc.

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Other Expenses (Tables)

9 Months Ended

Sep. 30, 2018

Other Income and Expenses [Abstract]

Schedule of General and Administrative Expenses

General and administrative expenses consisted of the following ($ in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Professional services(1)	$	1,022	$	933	$	3,383	$	2,811
Operating and other costs(1)		687		489		2,026		1,424
Subtotal		1,709		1,422		5,409		4,235
Non-cash compensation expenses
Restricted class A common stock earned		6,609		5,819		20,113		17,496
Director stock-based compensation		125		125		375		313
Subtotal		6,734		5,944		20,488		17,809
Total BXMT expenses		8,443		7,366		25,897		22,044
Other expenses		—		53		—		175
Total general and administrative expenses	$	8,443	$	7,419	$	25,897	$	22,219

(1)   During the three and nine months ended September 30, 2018, we recognized an aggregate $77,000 and $302,000, respectively, of expenses related to our Multifamily Joint Venture. During both the three and nine months ended September 30, 2017, we recognized an aggregate $112,000 of expenses related to our Multifamily venture.

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Stock-Based Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2018

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 Common Stock			Weighted-Average Grant Date Fair Value Per Share
Balance as of December 31, 2017		1,484,175		$	30.61
Granted		318,741			31.83
Vested		(404,241	)		28.89
Forfeited		(17,820	)		30.44
Balance as of September 30, 2018		1,380,855		$	31.40

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Fair Values (Tables)

9 Months Ended

Sep. 30, 2018

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):

	September 30, 2018								December 31, 2017
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Derivatives	$	—	$	2,719	$	—	$	2,719	$	—	$	1,214	$	—	$	1,214
Liabilities
Derivatives	$	—	$	3,676	$	—	$	3,676	$	—	$	4,911	$	—	$	4,911

Schedule of Details of Book Value, Face Amount, and Fair Value of Financial Instruments

The following table details the book value, face amount, and fair value of the financial instruments described in Note 2 ($ in thousands):

	September 30, 2018						December 31, 2017
	Book		Face		Fair		Book		Face		Fair
	Value		Amount		Value		Value		Amount		Value
Financial assets
Cash and cash equivalents	$	86,987	$	86,987	$	86,987	$	69,654	$	69,654	$	69,654
Restricted cash		—		—		—		32,864		32,864		32,864
Loans receivable, net		12,176,516		12,260,103		12,261,013		10,056,732		10,108,226		10,112,331
Debt securities held-to-maturity(1)		96,050		99,000		97,607		—		—		—
Financial liabilities
Secured debt agreements, net		6,841,759		6,862,256		6,862,256		5,273,855		5,290,536		5,290,536
Loan participations sold, net		81,044		81,170		81,170		80,415		80,706		80,706
Securitized debt obligations, net		1,284,362		1,292,120		1,297,032		1,282,412		1,292,120		1,292,589
Convertible notes, net		780,951		794,828		832,407		563,911		575,000		610,201

(1)   Included in other assets on our consolidated balance sheets.

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Variable Interest Entities (Tables)

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Assets and Liabilities of Consolidated CLO and 2017 Single Asset Securitization VIE

The following table details the assets and liabilities of our consolidated CLO and 2017 Single Asset Securitization VIEs ($ in thousands):

	September 30, 2018		December 31, 2017
Assets:
Loans receivable, net	$	1,500,000	$	1,500,000
Other assets		4,899		2,407
Total assets	$	1,504,899	$	1,502,407
Liabilities:
Securitized debt obligations, net	$	1,284,362	$	1,282,412
Other liabilities		1,869		1,379
Total liabilities	$	1,286,231	$	1,283,791

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Principal Contractual Obligations

Our contractual principal debt repayments as of September 30, 2018 were as follows ($ in thousands):

			Payment Timing
	Total Obligation		Less Than 1 Year		1 to 3 Years		3 to 5 Years		More Than 5 Years
Principal repayments under secured debt agreements(1)	$	6,862,256	$	273,254	$	2,393,008	$	4,112,794	$	83,200
Principal repayments of convertible notes(2)		794,828		172,328		—		622,500		—
Total(3)	$	7,657,084	$	445,582	$	2,393,008	$	4,735,294	$	83,200

(1)	The allocation of repayments under our secured debt agreements is based on the earlier of (i) the maturity date of each facility, or (ii) the maximum maturity date of the collateral loans, assuming all extension options are exercised by the borrower.
(2)	Reflects the outstanding principal balance of convertible notes, excluding any potential conversion premium. Refer to Note 8 for further details on our convertible notes.
(3)	As of September 30, 2018, the total does not include $81.2 million of loan participations sold, $466.7 million of non-consolidated senior interests, and $1.3 billion of securitized debt obligations, as the satisfaction of these liabilities will not require cash outlays from us.

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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2018	Apr. 30, 2017	Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Joint venture capital contribution percentage		85.00%
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 and liquid investments with original maturities of three months or less.
Expected loss	$ 0
Provision for loan losses	$ 0
Walker and Dunlop [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Joint venture capital contribution percentage		15.00%
General Electrical Capital Corporation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchase price of Loan Portfolio			$ 4,700,000,000

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Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 86,987	$ 69,654	$ 61,221
Restricted cash		32,864	32,864
Total cash, cash equivalents, and restricted cash shown in our consolidated statements of cash flows	$ 86,987	$ 102,518	$ 94,085	$ 75,567

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Loans Receivable, Net - Overall Statistics for Loans Receivable Portfolio (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) SecurityLoan	Dec. 31, 2017 USD ($) SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	112	110
Net book value	$ 12,176,516	$ 10,056,732
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	112	110
Principal balance	$ 12,260,103	$ 10,108,226
Unfunded loan commitments	$ 3,046,350	$ 1,573,107
Weighted-average maximum maturity (years)	3 years 9 months 18 days	3 years 6 months
Loans Receivable [Member] | LIBOR [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted-average cash coupon, rate	5.61%	5.55%
Weighted-average all-in yield, rate	5.94%	5.95%
Net Book Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 12,176,516	$ 10,056,732

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Loans Receivable, Net - Overall Statistics for Loans Receivable Portfolio (Parenthetical) (Detail)	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of loans subject to yield maintenance, or other prepayment restrictions	86.00%	75.00%
Percentage of loans open to repayment by borrower without penalty	14.00%	25.00%
USD LIBOR [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of loans receivable by type	83.00%	92.00%

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Loans Receivable, Net - Activity Relating to Loans Receivable Portfolio (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance			$ 10,056,732
Loan contributed to securitization	$ 517,500
Unrealized (loss) gain on foreign currency translation	(2,416)	$ 16,175	(26,766)	$ 43,990
Amortization of fees and other items			35,955	$ 28,887
Ending Balance	12,176,516		12,176,516
Net Book Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance			10,056,732
Loan fundings			5,222,803
Loan repayments			(2,452,811)
Loan contributed to securitization			512,002
Unrealized (loss) gain on foreign currency translation			(99,937)
Deferred fees and other items			(74,111)
Amortization of fees and other items			35,842
Ending Balance	12,176,516		12,176,516
Deferred Fees/Other Items [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance			(51,494)
Loan contributed to securitization			5,498
Unrealized (loss) gain on foreign currency translation			678
Deferred fees and other items			(74,111)
Amortization of fees and other items			35,842
Ending Balance	(83,587)		(83,587)
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Balance			10,108,226
Loan fundings			5,222,803
Loan repayments			(2,452,811)
Loan contributed to securitization			517,500
Unrealized (loss) gain on foreign currency translation			(100,615)
Ending Balance	$ 12,260,103		$ 12,260,103

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Loans Receivable, Net - Property Type and Geographic Distribution of Properties Securing Loans in Portfolio (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) SecurityLoan	Dec. 31, 2017 USD ($) SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	112	110
Net book value	$ 12,176,516	$ 10,056,732
Total Loan Exposure	$ 12,726,831	$ 11,093,608
Percentage of Portfolio	100.00%	100.00%
Office [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	49	53
Net book value	$ 5,956,675	$ 5,773,972
Total Loan Exposure	$ 6,006,534	$ 5,807,170
Percentage of Portfolio	47.00%	53.00%
Hotel [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	15	15
Net book value	$ 1,992,889	$ 1,830,568
Total Loan Exposure	$ 2,069,818	$ 1,905,497
Percentage of Portfolio	16.00%	17.00%
Multifamily [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	32	6
Net book value	$ 1,894,001	$ 487,473
Total Loan Exposure	$ 1,903,572	$ 940,980
Percentage of Portfolio	15.00%	8.00%
Spanish Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	1
Net book value	$ 1,152,487
Total Loan Exposure	$ 1,160,400
Percentage of Portfolio	9.00%
Retail [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	4	25
Net book value	$ 336,787	$ 1,220,423
Total Loan Exposure	$ 337,334	$ 1,228,959
Percentage of Portfolio	3.00%	11.00%
Condominium [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	2	2
Net book value	$ 84,429	$ 142,342
Total Loan Exposure	$ 158,462	$ 268,751
Percentage of Portfolio	1.00%	2.00%
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	9	9
Net book value	$ 759,248	$ 601,954
Total Loan Exposure	$ 1,090,711	$ 942,251
Percentage of Portfolio	9.00%	9.00%
United States Northeast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	30	26
Net book value	$ 3,796,633	$ 2,857,948
Total Loan Exposure	$ 3,830,021	$ 2,871,219
Percentage of Portfolio	29.00%	26.00%
United States West [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	25	29
Net book value	$ 2,543,743	$ 2,672,069
Total Loan Exposure	$ 2,637,582	$ 2,816,276
Percentage of Portfolio	21.00%	24.00%
United States Southeast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	18	17
Net book value	$ 2,025,381	$ 2,007,202
Total Loan Exposure	$ 2,034,852	$ 2,470,992
Percentage of Portfolio	16.00%	22.00%
United States Midwest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	8	9
Net book value	$ 901,310	$ 856,559
Total Loan Exposure	$ 906,102	$ 862,578
Percentage of Portfolio	7.00%	8.00%
United States Southwest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	13	10
Net book value	$ 477,809	$ 380,204
Total Loan Exposure	$ 480,792	$ 380,120
Percentage of Portfolio	4.00%	3.00%
United States Northwest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	2	2
Net book value	$ 141,199	$ 283,381
Total Loan Exposure	$ 141,630	$ 286,221
Percentage of Portfolio	1.00%	3.00%
United States [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	96	93
Net book value	$ 9,886,075	$ 9,057,363
Total Loan Exposure	$ 10,030,979	$ 9,687,406
Percentage of Portfolio	78.00%	86.00%
Spain [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	1
Net book value	$ 1,152,487
Total Loan Exposure	$ 1,160,400
Percentage of Portfolio	9.00%
United Kingdom [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	5	6
Net book value	$ 492,790	$ 440,317
Total Loan Exposure	$ 837,688	$ 794,789
Percentage of Portfolio	7.00%	7.00%
Canada [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	5	7
Net book value	$ 335,957	$ 415,893
Total Loan Exposure	$ 332,841	$ 412,343
Percentage of Portfolio	3.00%	4.00%
Australia [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	2
Net book value	$ 218,286
Total Loan Exposure	$ 220,335
Percentage of Portfolio	2.00%
Belgium [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	1	1
Net book value	$ 71,494	$ 73,779
Total Loan Exposure	$ 71,945	$ 74,431
Percentage of Portfolio	1.00%	1.00%
Germany [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	1	1
Net book value	$ 11,814	$ 12,237
Total Loan Exposure	$ 65,000	$ 67,399
Percentage of Portfolio		1.00%
Netherlands [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	1	2
Net book value	$ 7,613	$ 57,143
Total Loan Exposure	$ 7,643	$ 57,240
Percentage of Portfolio		1.00%
International [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	16	17
Net book value	$ 2,290,441	$ 999,369
Total Loan Exposure	$ 2,695,852	$ 1,406,202
Percentage of Portfolio	22.00%	14.00%

XML

Loans Receivable, Net - Property Type and Geographic Distribution of Properties Securing Loans in Portfolio (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Jul. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loan exposure including senior interests	$ 466.7		$ 985.4
Single asset securitization principal amount		$ 1,000.0		$ 474.6
2018 Single Asset Securitization [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Single asset securitization principal amount	$ 1,000.0

XML

Loans Receivable, Net - Principal Balance and Net Book Value of Loans Receivable Based on Internal Risk Ratings (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) SecurityLoan	Dec. 31, 2017 USD ($) SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	112	110
Net book value	$ 12,176,516	$ 10,056,732
Total Loan Exposure	$ 12,726,831	$ 11,093,608
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	112	110
Net Book Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 12,176,516	$ 10,056,732
Risk Rating 1 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Exposure	$ 53,873	$ 31,890
Risk Rating 1 [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	1	1
Risk Rating 1 [Member] | Net Book Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 53,849	$ 31,842
Risk Rating 2 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Exposure	$ 4,272,068	$ 3,521,701
Risk Rating 2 [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	43	41
Risk Rating 2 [Member] | Net Book Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 4,167,871	$ 3,512,709
Risk Rating 3 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Exposure	$ 8,400,890	$ 7,519,465
Risk Rating 3 [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan	68	67
Risk Rating 3 [Member] | Net Book Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value	$ 7,954,796	$ 6,491,617
Risk Rating 4 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loan Exposure		$ 20,552
Risk Rating 4 [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | SecurityLoan		1
Risk Rating 4 [Member] | Net Book Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value		$ 20,564

XML

Loans Receivable, Net - Principal Balance and Net Book Value of Loans Receivable Based on Internal Risk Ratings (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Jul. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loan exposure including senior interests	$ 466.7		$ 985.4
Single asset securitization principal amount		$ 1,000.0		$ 474.6
2018 Single Asset Securitization [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Single asset securitization principal amount	$ 1,000.0

XML

Loans Receivable, Net - Additional Information (Detail)	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted-average risk rating on loan exposure	2.7	2.7
Impaired loans	$ 0	$ 0
Loans held	12,726,831,000	11,093,608,000
Multifamily [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held	1,903,572,000	940,980,000
Joint Venture [Member] | Multifamily [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held	$ 222,700,000	$ 182,200,000

XML

Other Assets and Liabilities - Summary of Components of Other Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Debt securities held-to-maturity	$ 96,050
Accrued interest receivable	45,762	$ 38,573
Collateral deposited under derivative agreements	7,360	4,120
Loan portfolio payments held by servicer	3,902	54,759
Derivative assets	2,719	1,214
Prepaid expenses	151	798
Prepaid taxes	28	31
Other		80
Total	$ 155,972	$ 99,575

XML

Other Assets and Liabilities - Summary of Components of Other Assets (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Jul. 31, 2018	Jun. 30, 2017
Schedule Of Other Assets [Line Items]
Subordinate risk retention interest	$ 99.0
Percentage of yield in subordinate risk retention interest	10.00%
Single asset securitization principal amount		$ 1,000.0	$ 474.6
2018 Single Asset Securitization [Member]
Schedule Of Other Assets [Line Items]
Single asset securitization principal amount	$ 1,000.0
Single asset securitization maximum maturity date	Jun. 09, 2025

XML

Other Assets and Liabilities - Summary of Components of Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Other Liabilities [Abstract]
Accrued dividends payable	$ 74,195	$ 66,888
Accrued interest payable	23,701	14,162
Accrued management and incentive fees payable	18,368	14,284
Derivative liabilities	3,676	4,911
Accounts payable and other liabilities	3,426	2,125
Secured debt repayments pending servicer remittance		38,456
Total	$ 123,366	$ 140,826

XML

Secured Debt Agreements, Net - Schedule of Secured Debt Agreements (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding	$ 6,862,256	$ 5,290,536
Deferred financing costs	(20,497)	(16,681)
Net book value of secured debt	6,841,759	5,273,855
Credit Facilities [Member]
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding	4,850,911	4,068,249
GE Portfolio Acquisition Facility [Member]
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding	512,059	703,423
Asset-Specific Financings [Member]
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding	$ 1,499,286	$ 518,864

XML

Secured Debt Agreements, Net - Additional Information (Detail) € in Millions	3 Months Ended		9 Months Ended				12 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Facility	Sep. 30, 2018 GBP (£) Facility	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2018 EUR (€)	Sep. 30, 2018 GBP (£)	Dec. 31, 2017 GBP (£)
Debt Instrument [Line Items]
Aggregate borrowings	$ 5,409,815,000		$ 5,409,815,000
Basis spread on debt obligation, in percent			1.77%	1.77%
Weighted-average advance rate			79.20%	79.20%
Secured debt agreements borrowings outstanding					$ 38,456,000		$ 38,456,000
Maximum Facility Size	651,600,000		$ 651,600,000		675,700,000		675,700,000		£ 500,000,000	£ 500,000,000
Interest expense	97,955,000	$ 67,891,000	255,677,000			$ 168,917,000
Secured debt agreements borrowings outstanding	6,862,256,000		6,862,256,000		5,290,536,000		5,290,536,000
Covenants, minimum tangible net worth	$ 2,400,000,000		$ 2,400,000,000
Covenants, percentage of tangible assets on cash proceeds from equity issuances			75.00%	75.00%
Covenants, percentage of recourse indebtedness	5.00%		5.00%					5.00%	5.00%
Maximum [Member]
Debt Instrument [Line Items]
Covenants, indebtedness to total assets, in percent	83.33%		83.33%					83.33%	83.33%
Minimum [Member]
Debt Instrument [Line Items]
Covenants, EBITDA to fixed charges, in percent			140.00%	140.00%
Covenants, minimum cash liquidity amount	$ 10,000,000		$ 10,000,000
Asset-Specific Financings [Member]
Debt Instrument [Line Items]
Weighted-average outstanding balance			1,300,000,000		522,500,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Weighted-average outstanding balance			37,800,000		40,700,000
Interest expense			2,600,000		2,600,000
Amortization of deferred fees and expenses			825,000		703,000
Secured debt agreements borrowings outstanding	0		0		0		0
Revolving Credit Facility [Member] | Barclays [Member]
Debt Instrument [Line Items]
Maximum Facility Size	250,000,000		$ 250,000,000
First mortgage bridge to term financing maximum period			6 months	6 months
Credit Facilities [Member]
Debt Instrument [Line Items]
Additional credit capacity | £				£ 250,000,000
Weighted-average outstanding balance			$ 4,400,000,000		4,200,000,000
Aggregate borrowings	4,850,911,000		$ 4,850,911,000		4,068,249,000		$ 4,068,249,000
Weighted-average advance rate			79.20%	79.20%			78.70%
Weighted-average initial maturity			1 year 6 months	1 year 6 months			1 year 6 months
Maximum Facility Size	8,315,710,000		$ 8,315,710,000		7,155,975,000		$ 7,155,975,000
Secured debt agreements borrowings outstanding	4,850,911,000		4,850,911,000		$ 4,068,249,000		$ 4,068,249,000
Credit Facilities [Member] | Barclays [Member]
Debt Instrument [Line Items]
Aggregate borrowings	617,360,000		617,360,000
Maximum Facility Size	$ 1,000,000,000		$ 1,000,000,000
New Credit Facilities [Member]
Debt Instrument [Line Items]
Number of new credit facility | Facility			1	1
Additional credit capacity | £				£ 1,000,000,000
Asset-Specific Financings [Member]
Debt Instrument [Line Items]
Secured debt agreements borrowings outstanding | €								€ 800.0
Asset-Specific Financings [Member] | Senior Loan [Member]
Debt Instrument [Line Items]
Secured loan | €								€ 1,000.0
LIBOR [Member] | Credit Facilities [Member] | Weighted-Average Cash Coupon [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent			1.77%	1.77%			1.90%
LIBOR [Member] | Credit Facilities [Member] | Weighted-Average All-in Cost of Credit [Member]
Debt Instrument [Line Items]
Basis spread on debt obligation, in percent			1.98%	1.98%			2.12%

XML

Secured Debt Agreements, Net - Credit Facilities (Detail)	Sep. 30, 2018 USD ($)	Sep. 30, 2018 EUR (€)	Sep. 30, 2018 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 GBP (£)
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 651,600,000		£ 500,000,000	$ 675,700,000		£ 500,000,000
Potential	4,850,911,000
Repurchase Borrowings Outstanding	5,409,815,000
Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	8,315,710,000			7,155,975,000
Potential	5,409,814,000			4,664,097,000
Repurchase Borrowings Outstanding	4,850,911,000			4,068,249,000
Available	558,903,000			595,848,000
Collateral Assets	7,046,983,000			6,064,983,000
Bank of America [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	1,000,000,000			750,000,000
Potential	863,592,000			573,542,000
Repurchase Borrowings Outstanding	863,592,000			573,542,000
Collateral Assets	1,091,860,000			765,049,000
Wells Fargo [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	2,000,000,000			2,000,000,000
Potential	1,160,678,000			1,289,135,000
Repurchase Borrowings Outstanding	850,687,000			1,170,801,000
Available	309,991,000			118,334,000
Collateral Assets	1,577,251,000			1,680,325,000
MetLife [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	1,000,000,000			1,000,000,000
Potential	737,770,000			807,164,000
Repurchase Borrowings Outstanding	737,770,000			807,164,000
Collateral Assets	946,933,000			1,039,231,000
Barclays [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	1,000,000,000
Potential	617,360,000
Repurchase Borrowings Outstanding	617,360,000
Collateral Assets	771,700,000
Citibank [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	750,000,000			800,125,000
Potential	576,369,000			354,354,000
Repurchase Borrowings Outstanding	480,129,000			240,881,000
Available	96,240,000			113,473,000
Collateral Assets	730,723,000			455,433,000
JP Morgan [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	500,000,000			500,000,000
Potential	435,095,000			443,496,000
Repurchase Borrowings Outstanding	332,909,000			319,755,000
Available	102,186,000			123,741,000
Collateral Assets	564,070,000			579,218,000
Morgan Stanley [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	651,550,000			675,650,000
Potential	329,256,000			456,344,000
Repurchase Borrowings Outstanding	278,770,000			216,044,000
Available	50,486,000			240,300,000
Collateral Assets	461,760,000			591,168,000
Deutsche Bank [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	500,000,000			500,000,000
Potential	277,247,000			295,743,000
Repurchase Borrowings Outstanding	277,247,000			295,743,000
Collateral Assets	380,986,000			399,203,000
Societe Generale [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	464,160,000	€ 400.0		480,200,000	€ 400.0
Potential	235,229,000			300,871,000
Repurchase Borrowings Outstanding	235,229,000			300,871,000
Collateral Assets	298,951,000			373,181,000
Goldman Sachs - Multi. JV [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	250,000,000			250,000,000
Potential	117,498,000			57,888,000
Repurchase Borrowings Outstanding	117,498,000			57,888,000
Collateral Assets	148,099,000			75,225,000
Bank of America - Multi. JV [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	200,000,000			200,000,000
Potential	59,720,000			85,560,000
Repurchase Borrowings Outstanding	59,720,000			85,560,000
Collateral Assets	$ 74,650,000			$ 106,950,000

XML

Secured Debt Agreements, Net - Credit Facilities (Parenthetical) (Detail)	Sep. 30, 2018 USD ($)	Sep. 30, 2018 EUR (€)	Sep. 30, 2018 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 GBP (£)
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 651,600,000		£ 500,000,000	$ 675,700,000		£ 500,000,000
Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	8,315,710,000			7,155,975,000
Citibank [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	750,000,000			800,125,000
Citibank [Member] | Credit Facilities [Member] | UK Pound Sterling 250.0 Million ($300.0 Million) Facility [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size				300,100,000	€ 250,000,000
Citibank [Member] | Credit Facilities [Member] | $500.0 Million Facility [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size				500,000,000
Societe Generale [Member] | Credit Facilities [Member]
Line of Credit Facility [Line Items]
Maximum Facility Size	$ 464,160,000	€ 400.0		$ 480,200,000	€ 400.0

XML

Secured Debt Agreements, Net - Summary of Key Terms of Credit Facilities (Detail) € in Thousands, £ in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2018 EUR (€)	Sep. 30, 2018 GBP (£)
Line of Credit Facility [Line Items]
Outstanding Borrowings	$ 5,409,815
Potential Borrowings	$ 4,850,911
Rate	1.77%
Advance Rate	79.20%
Credit Facilities [Member]
Line of Credit Facility [Line Items]
Outstanding Borrowings	$ 4,850,911	$ 4,068,249
Potential Borrowings	$ 5,409,814	$ 4,664,097
Advance Rate	79.20%	78.70%
Credit Facilities [Member] | 1-Month USD LIBOR [Member]
Line of Credit Facility [Line Items]
Outstanding Borrowings	$ 5,024,025
Potential Borrowings	$ 4,551,603
Rate	1.75%
Advance Rate	79.20%
Credit Facilities [Member] | 3-Month EUR LIBOR [Member]
Line of Credit Facility [Line Items]
Outstanding Borrowings | €			€ 54,869
Potential Borrowings | €			€ 12,100
Rate	2.28%
Advance Rate	80.00%
Credit Facilities [Member] | 3-Month GBP LIBOR [Member]
Line of Credit Facility [Line Items]
Outstanding Borrowings | £				£ 247,194
Potential Borrowings | £				£ 218,914
Rate	1.97%
Advance Rate	79.00%
Credit Facilities [Member] | Wells Fargo [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Margin Call	Collateral marks only
Term/Maturity	Term matched
Outstanding Borrowings	$ 850,687	$ 1,170,801
Potential Borrowings	$ 1,160,678	1,289,135
Credit Facilities [Member] | MetLife [Member]
Line of Credit Facility [Line Items]
Guarantee	50.00%
Margin Call	Collateral marks only
Term/Maturity	Apr. 22, 2023
Outstanding Borrowings	$ 737,770	807,164
Potential Borrowings	$ 737,770	807,164
Credit Facilities [Member] | Bank of America [Member]
Line of Credit Facility [Line Items]
Guarantee	50.00%
Margin Call	Collateral marks only
Term/Maturity	May 21, 2023
Outstanding Borrowings	$ 863,592	573,542
Potential Borrowings	$ 863,592	573,542
Credit Facilities [Member] | Societe Generale [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Margin Call	Collateral marks only
Term/Maturity	Term matched
Outstanding Borrowings	$ 235,229	300,871
Potential Borrowings	$ 235,229	300,871
Credit Facilities [Member] | Deutsche Bank [Member]
Line of Credit Facility [Line Items]
Guarantee	32.00%
Margin Call	Collateral marks only
Term/Maturity	Aug. 09, 2021
Outstanding Borrowings	$ 277,247	295,743
Potential Borrowings	$ 277,247	295,743
Credit Facilities [Member] | Citibank [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Margin Call	Collateral marks only
Term/Maturity	Term matched
Outstanding Borrowings	$ 480,129	240,881
Potential Borrowings	$ 576,369	354,354
Credit Facilities [Member] | Morgan Stanley [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Margin Call	Collateral marks only
Term/Maturity	Mar. 03, 2020
Outstanding Borrowings	$ 278,770	216,044
Potential Borrowings	$ 329,256	456,344
Credit Facilities [Member] | JP Morgan [Member]
Line of Credit Facility [Line Items]
Guarantee	50.00%
Margin Call	Collateral marks only
Term/Maturity	Jan. 07, 2021
Outstanding Borrowings	$ 332,909	319,755
Potential Borrowings	$ 435,095	443,496
Credit Facilities [Member] | Bank of America - Multi. JV [Member]
Line of Credit Facility [Line Items]
Guarantee	43.00%
Margin Call	Collateral marks only
Term/Maturity	Jul. 19, 2021
Outstanding Borrowings	$ 59,720	85,560
Potential Borrowings	$ 59,720	85,560
Credit Facilities [Member] | Goldman Sachs - Multi. JV [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Margin Call	Collateral marks only
Term/Maturity	Jul. 12, 2020
Outstanding Borrowings	$ 117,498	57,888
Potential Borrowings	$ 117,498	$ 57,888
Credit Facilities [Member] | Barclays [Member]
Line of Credit Facility [Line Items]
Guarantee	25.00%
Margin Call	Collateral marks only
Term/Maturity	Mar. 29, 2023
Outstanding Borrowings	$ 617,360
Potential Borrowings	$ 617,360

XML

Secured Debt Agreements, Net - Summary of Key Terms of Credit Facilities (Parenthetical) (Detail) - Credit Facilities [Member]	9 Months Ended
	Sep. 30, 2018 ExtensionOptions
MetLife [Member]
Line of Credit Facility [Line Items]
Maturity period	Includes four one-year extension options which may be exercised at our sole discretion.
Number of extension options	4
Term of maturity date	1 year
Number of extension options	4
Term of maturity date	1 year
Maturity period	Includes four one-year extension options which may be exercised at our sole discretion.
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
Number of extension options	2
Term of maturity date	1 year
Maturity period	Includes two one-year extension options which may be exercised at our sole discretion.
Deutsche Bank [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
Number of extension options	2
Term of maturity date	1 year
Maturity period	Includes two one-year extension options which may be exercised at our sole discretion.
Goldman Sachs - Multi. JV [Member]
Line of Credit Facility [Line Items]
Maturity period	Includes one one-year extension option which may be exercised at our sole discretion.
Number of extension options	1
Term of maturity date	1 year
Number of extension options	1
Term of maturity date	1 year
Maturity period	Includes one one-year extension option which may be exercised at our sole discretion.
Barclays [Member]
Line of Credit Facility [Line Items]
Maturity period	Includes four one-year extension options which may be exercised at our sole discretion.
Number of extension options	4
Term of maturity date	1 year
Number of extension options	4
Term of maturity date	1 year
Maturity period	Includes four one-year extension options which may be exercised at our sole discretion.

XML

Secured Debt Agreements, Net - Summary of Asset-Specific Financings (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) SecurityLoan	Dec. 31, 2017 USD ($) SecurityLoan
GE Portfolio Acquisition Facility [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Term	2021-05	2020-07
Guarantee	$ 250,000	$ 250,000
Collateral assets, Book Value	664,189	911,092
Financing provided, Book Value	511,346	702,337
Collateral assets, Principal Balance	662,464	906,707
Financing provided, Principal Balance	$ 512,059	$ 703,423
Count | SecurityLoan	11	16
GE Portfolio Acquisition Facility [Member] | Collateral Assets [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Term	2021-05	2020-07
Count | SecurityLoan	11	16
GE Portfolio Acquisition Facility [Member] | LIBOR [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Yield/Cost Rate	1.77%	1.72%
GE Portfolio Acquisition Facility [Member] | LIBOR [Member] | Collateral Assets [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Yield/Cost Rate	5.92%	5.74%
Asset-Specific Financings [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Term	2022-09	2020-12
Guarantee	$ 1,178,874	$ 162,475
Collateral assets, Book Value	1,895,094	677,296
Financing provided, Book Value	1,492,614	517,088
Collateral assets, Principal Balance	1,905,475	682,259
Financing provided, Principal Balance	$ 1,499,286	$ 518,864
Count | SecurityLoan	5	6
Asset-Specific Financings [Member] | Collateral Assets [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Term	2022-09	2020-12
Count | SecurityLoan	5	6
Asset-Specific Financings [Member] | LIBOR [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Yield/Cost Rate	1178874.00%	162475.00%

XML

Secured Debt Agreements, Net - Summary of Asset-Specific Financings (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2018 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 GBP (£)
Participating Mortgage Loans [Line Items]
Maximum Facility Size	$ 651,600,000	£ 500,000,000	$ 675,700,000	£ 500,000,000
Approximate credit line, outstanding amount	5,409,815,000
GE Portfolio Acquisition Facility [Member]
Participating Mortgage Loans [Line Items]
Borrowings	512,059,000		703,423,000
Maximum Facility Size	608,700,000		816,300,000
Approximate credit line, outstanding amount	512,100,000		703,400,000
Amount available for potential future fundings of loan	$ 96,600,000		112,900,000
GE Portfolio Acquisition Facility [Member] | Maximum [Member]
Participating Mortgage Loans [Line Items]
Percentage of guarantee rate	25.00%	25.00%
Guarantee of outstanding borrowings	$ 250,000,000
Asset-Specific Financings [Member]
Participating Mortgage Loans [Line Items]
Borrowings	1,499,286,000		518,864,000
Cross Collateral Assets [Member] | Asset-Specific Financings [Member]
Participating Mortgage Loans [Line Items]
Borrowings	$ 517,800,000		$ 394,800,000

XML

Loan Participations Sold, Net - Summary of Statistics for Loan Participations Sold (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) SecurityLoan	Dec. 31, 2017 USD ($) Loans SecurityLoan
Participating Mortgage Loans [Line Items]
Count | SecurityLoan	1	1
Principal Balance	$ 106,259	$ 141,119
Weighted Average Term	2022-02	2022-02
Book Value, Total Loan	$ 12,176,516	$ 10,056,732
Book Value	$ 81,044	$ 80,415
Senior Participation [Member]
Participating Mortgage Loans [Line Items]
Count	1	1
Principal Balance	$ 81,170	$ 80,706
Weighted Average Term	2022-02	2022-02
Book Value	$ 81,044	$ 80,415
Loan Participations Sold [Member]
Participating Mortgage Loans [Line Items]
Book Value, Total Loan	$ 105,149	$ 138,907
LIBOR [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Yield/Cost	6.06%	5.94%
LIBOR [Member] | Senior Participation [Member]
Participating Mortgage Loans [Line Items]
Weighted Average Yield/Cost	4.08%	4.14%

XML

Loan Participations Sold, Net - Summary of Statistics for Loan Participations Sold (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Participating Mortgage Loans [Line Items]
Deferred financing costs	$ 20,497		$ 20,497		$ 16,681
Loan Participations Sold [Member]
Participating Mortgage Loans [Line Items]
Interest expense	11,700	$ 4,000	15,200	$ 9,300
Deferred financing costs	$ 126,000		$ 126,000		$ 291,000

XML

Securitized Debt Obligations, Net - Schedule of Information on Securitized Debt Obligations (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) Loans	Dec. 31, 2017 USD ($) Loans	Jul. 31, 2018 USD ($)	Jun. 30, 2017 USD ($)
Debt Instrument [Line Items]
Principal Balance			$ 1,000,000	$ 474,600
Financing Provided [Member]
Debt Instrument [Line Items]
Count | Loans	2	2
Principal Balance	$ 1,292,120	$ 1,292,120
Book Value	$ 1,284,362	$ 1,282,411
Financing Provided [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	1.71%	1.83%
Financing Provided [Member] | 2017 Single Asset Securitization [Member]
Debt Instrument [Line Items]
Count | Loans	1	1
Principal Balance	$ 474,620	$ 474,620
Book Value	$ 474,418	$ 474,328
Term	2033-06	2033-06
Financing Provided [Member] | 2017 Single Asset Securitization [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	1.65%	1.94%
Financing Provided [Member] | Collateralized Loan Obligations [Member]
Debt Instrument [Line Items]
Count | Loans	1	1
Principal Balance	$ 817,500	$ 817,500
Book Value	$ 809,944	$ 808,083
Term	2035-06	2035-06
Financing Provided [Member] | Collateralized Loan Obligations [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	1.74%	1.76%
Collateral Assets [Member]
Debt Instrument [Line Items]
Count | Loans	29	32
Principal Balance	$ 1,678,963	$ 1,656,406
Book Value	$ 1,675,437	$ 1,652,880
Wtd. Avg. Yield/Cost	6.00%	5.17%
Collateral Assets [Member] | 2017 Single Asset Securitization [Member]
Debt Instrument [Line Items]
Count | Loans	1	1
Principal Balance	$ 678,963	$ 656,406
Book Value	$ 675,437	$ 652,880
Term	2023-06	2023-06
Collateral Assets [Member] | 2017 Single Asset Securitization [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	3.60%	3.60%
Collateral Assets [Member] | Collateralized Loan Obligations [Member]
Debt Instrument [Line Items]
Count | Loans	28	31
Principal Balance	$ 1,000,000	$ 1,000,000
Book Value	$ 1,000,000	$ 1,000,000
Wtd. Avg. Yield/Cost	6.09%	5.16%
Term	2022-02	2021-11

XML

Securitized Debt Obligations, Net - Schedule of Information on Securitized Debt Obligations (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Percentage of loans financed by securitized debt obligations earned floating rate of interest			98.00%		98.00%
Interest expense on securitized debt obligations	$ 12.5	$ 3.8	$ 35.6	$ 3.8
Collateral Assets [Member] | 2017 Single Asset Securitization [Member]
Debt Instrument [Line Items]
Total loan amount, securitized	$ 500.0		$ 500.0

XML

Convertible Notes, Net - Summary of Outstanding Convertible Senior Notes (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
5.25% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible Note Issuance	2013-11
Face Value	$ 172,328
Coupon Rate	5.25%
All-in Cost	5.87%
Conversion Rate	36.5472
Maturity	Dec. 01, 2018
4.38% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible Note Issuance	2017-05
Face Value	$ 402,500
Coupon Rate	4.38%
All-in Cost	4.85%
Conversion Rate	28.0324
Maturity	May 05, 2022
4.75% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible Note Issuance	2018-03
Face Value	$ 220,000
Coupon Rate	4.75%
All-in Cost	5.33%
Conversion Rate	27.6052
Maturity	Mar. 15, 2023

XML

Convertible Notes, Net - Summary of Outstanding Convertible Senior Notes (Parenthetical) (Detail)				9 Months Ended
	Oct. 15, 2018	Jul. 16, 2018	Mar. 28, 2018 USD ($) $ / shares	Sep. 30, 2018 USD ($) $ / shares	Sep. 28, 2018 $ / shares
5.25% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, conversion price					$ 33.51
Convertible Notes, debt conversion, common stock issued, in percent				36.5472
5.25% Convertible Senior Notes [Member] | Class A Common Stock [Member]
Debt Instrument [Line Items]
Convertible Notes, debt conversion, principal amount | $				$ 1,000
4.38% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible Notes, debt conversion, common stock issued, in percent				28.0324
4.38% Convertible Senior Notes [Member] | Class A Common Stock [Member]
Debt Instrument [Line Items]
Convertible Notes, debt conversion, principal amount | $				$ 1,000
Convertible Senior Notes [Member] | Class A Common Stock [Member]
Debt Instrument [Line Items]
Convertible Notes, debt conversion, principal amount | $			$ 1,000
Debt instrument, conversion price			$ 27.67
Convertible Notes, debt conversion, common stock issued, in percent		36.8161	36.1380
Convertible Senior Notes [Member] | Class A Common Stock [Member] | Subsequent Events [Member]
Debt Instrument [Line Items]
Convertible Notes, debt conversion, common stock issued, in percent	36.8161
5.25% Convertible Senior Notes Issued in November 2013 [Member] | Class A Common Stock [Member]
Debt Instrument [Line Items]
Debt instrument, conversion price				$ 27.36
4.38% Convertible Senior Notes Issued in May 2017 [Member] | Class A Common Stock [Member]
Debt Instrument [Line Items]
Debt instrument, conversion price				$ 35.67
4.75% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible Notes, debt conversion, common stock issued, in percent				27.6052
4.75% Convertible Senior Notes [Member] | Class A Common Stock [Member]
Debt Instrument [Line Items]
Convertible Notes, debt conversion, principal amount | $				$ 1,000
4.75% Convertible Senior Notes Issued In March 2018 [Member] | Class A Common Stock [Member]
Debt Instrument [Line Items]
Debt instrument, conversion price				$ 36.23

XML

Convertible Notes, Net - Additional Information (Detail) - USD ($)	1 Months Ended	9 Months Ended
	Mar. 31, 2018	Sep. 30, 2018	Sep. 28, 2018	Dec. 31, 2017	May 31, 2017	Nov. 30, 2013
Debt Instrument [Line Items]
Accrued interest payable		$ 23,701,000		$ 14,162,000
5.25% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
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, January 31, 2022, and December 14, 2022 for the November 2013, May 2017, and March 2018 convertible notes, respectively, at the applicable conversion rate in effect on the conversion date.
Debt instrument, conversion price			$ 33.51
Discount upon issuance of Convertible Notes						$ 9,100,000
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%
Accrued interest payable		$ 10,800,000		$ 3,700,000
4.38% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Discount upon issuance of Convertible Notes	$ 1,500,000				$ 979,000
Debt issuance costs	$ 5,200,000				$ 8,400,000
Convertible Notes, assumed effective interest rate	5.49%				4.57%
Convertible Senior Notes, Interest rate including amortization of discount upon issuance					4.91%
Convertible Notes, assumed effective interest rate	5.25%
2013 Convertible Notes [Member]
Debt Instrument [Line Items]
Convertible notes value		$ 172,000

XML

Convertible Notes, Net - Summary of Details of Net Book Value of Convertible Note (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Deferred financing costs	$ (20,497)	$ (16,681)
Net book value	780,951	563,911
Convertible Senior Note [Member]
Debt Instrument [Line Items]
Face Value	794,828	575,000
Unamortized discount	(12,956)	(10,279)
Deferred financing costs	(921)	(810)
Net book value	$ 780,951	$ 563,911

XML

Convertible Notes, Net - Summary of Details about Interest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Debt Instrument [Line Items]
Discount and issuance cost amortization			$ 20,993	$ 16,356
Convertible Senior Note [Member]
Debt Instrument [Line Items]
Cash coupon	$ 9,277	$ 6,247	25,333	12,732
Discount and issuance cost amortization	1,535	1,202	4,242	2,869
Total interest expense	$ 10,812	$ 7,449	$ 29,575	$ 15,601

XML

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, $ in Thousands, $ in Thousands	Sep. 30, 2018 EUR (€) DerivativeInstrument	Sep. 30, 2018 GBP (£) DerivativeInstrument	Sep. 30, 2018 CAD ($) DerivativeInstrument	Sep. 30, 2018 AUD ($) DerivativeInstrument	Dec. 31, 2017 GBP (£) DerivativeInstrument	Dec. 31, 2017 CAD ($) DerivativeInstrument
EUR [Member]
Derivative [Line Items]
Number of Instruments	1	1	1	1
Notional Amount | €	€ 185,000
GBP [Member]
Derivative [Line Items]
Number of Instruments	1	1	1	1	1	1
Notional Amount | £		£ 79,100			£ 112,700
CAD [Member]
Derivative [Line Items]
Number of Instruments	1	1	1	1	1	1
Notional Amount | $			$ 71,600			$ 95,100
AUD [Member]
Derivative [Line Items]
Number of Instruments	3	3	3	3
Notional Amount | $				$ 305,000

XML

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, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) DerivativeInstrument	Dec. 31, 2017 USD ($) DerivativeInstrument	Sep. 30, 2018 CAD ($) DerivativeInstrument	Dec. 31, 2017 GBP (£) DerivativeInstrument	Dec. 31, 2017 CAD ($) DerivativeInstrument
Interest Rate Caps [Member] | GBP [Member] | GBP LIBOR [Member]
Derivative [Line Items]
Number of Instruments | DerivativeInstrument		3		3	3
Notional Amount | £				£ 23,370
Strike		2.00%		2.00%	2.00%
Wtd. Avg. Maturity (Years)		3 months 19 days
Interest Rate Caps [Member] | USD [Member] | USD LIBOR [Member]
Derivative [Line Items]
Number of Instruments	9	9	9	9	9
Notional Amount | $	$ 204,248	$ 204,248
Strike	2.40%	2.40%	2.40%	2.40%	2.40%
Wtd. Avg. Maturity (Years)	8 months 12 days	1 year 6 months
Interest Rate Caps [Member] | CAD [Member] | CDOR [Member]
Derivative [Line Items]
Number of Instruments | DerivativeInstrument	3	3	3	3	3
Notional Amount | $			$ 22,765		$ 23,370
Strike	2.00%	2.00%	2.00%	2.00%	2.00%
Wtd. Avg. Maturity (Years)	4 months 24 days	3 months 19 days
Interest Rate Swaps [Member] | CAD [Member] | CDOR [Member]
Derivative [Line Items]
Number of Instruments | DerivativeInstrument	4	4	4	4	4
Notional Amount | $			$ 107,822		$ 108,094
Strike	1.00%	1.00%	1.00%	1.00%	1.00%
Wtd. Avg. Maturity (Years)	8 months 12 days	1 year 4 months 24 days

XML

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of collateral posted for the net assets/liability positions	$ 7,360,000		$ 7,360,000		$ 4,120,000
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives recorded gains (losses) during the period	$ 51,000	$ 42,000	94,000	$ 355,000
Interest Rate Swaps/Derivatives [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from accumulated other comprehensive income (loss) as increase to interest income			$ 570,000
Reclassification from accumulated other comprehensive income, time period			12 months

XML

Derivative Financial Instruments - Summary of Non-designated Hedges (Detail) - Not Designated as Hedging Instrument [Member] - EUR [Member] - Buy GBP / Sell EUR Forward [Member] € in Thousands	Sep. 30, 2018 EUR (€) DerivativeInstrument	Dec. 31, 2017 EUR (€) DerivativeInstrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Instruments | DerivativeInstrument	1	1
Amount | €	€ 12,857	€ 12,857

XML

Derivative Financial Instruments - Summary of Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	$ 2,719	$ 1,214
Fair Value of Derivatives in a Liability Position	3,676	4,911
Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	2,556	1,214
Fair Value of Derivatives in a Liability Position	3,676	4,872
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	1,514
Fair Value of Derivatives in a Liability Position	3,676	4,872
Designated as Hedging Instrument [Member] | Interest Rate Swaps/Derivatives [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	1,042	1,214
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Derivatives in an Asset Position	163
Fair Value of Derivatives in a Liability Position		39
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	$ 163
Fair Value of Derivatives in a Liability Position		$ 39

XML

Derivative Financial Instruments - Summary of Effect of Derivative Financial Instruments on Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	$ 1,855	$ 24,011
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	152	388
Net Investment [Member] | Foreign Currency Contracts [Member] | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	1,763	23,782
Cash Flow Hedges [Member] | Interest Rate Swaps/Derivatives [Member] | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	152,000	388,000
Cash Flow Hedges [Member] | Interest Rate Swaps/Derivatives [Member] | Interest Income (Expense) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives	92	228
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	$ 152	$ 388

XML

Derivative Financial Instruments - Summary of Effect of Derivative Financial Instruments on Consolidated Statements of Operations (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total interest and related expenses	$ 97,955	$ 67,891	$ 255,677	$ 168,917
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	152		388
Interest Rate Swaps/Derivatives [Member] | Cash Flow Hedges [Member] | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	152,000		388,000
Foreign Currency Contracts [Member] | Net Investment Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net cash settlements on our foreign currency forward contracts	$ 7,600		$ 21,000

XML

Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 15, 2018	Sep. 14, 2018	May 09, 2014	Aug. 31, 2018	May 31, 2013	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Mar. 25, 2014
Class of Stock [Line Items]
Total stock, shares authorized						300,000,000		300,000,000
Common stock, shares authorized						200,000,000		200,000,000		200,000,000
Preferred stock, shares authorized						100,000,000		100,000,000
Preferred stock issued						0		0
Preferred stock outstanding						0		0
Plan adoption date								Mar. 25, 2014
Number of shares sold during period					25,875,000			11,484,414	971
Net proceeds from issuance of class A common stock								$ 369,787	$ 31
Dividends paid	$ 74,200
Dividends declared per share of common stock		$ 0.62				$ 0.62	$ 0.62	$ 1.86	$ 1.86
Dividends paid per common stock	$ 0.62
Date of dividend paid								Oct. 15, 2018
Date of dividend declared								Sep. 14, 2018
Record date of dividend paid								Sep. 28, 2018
Accumulated other comprehensive loss						$ (32,849)		$ (32,849)		$ (29,706)
Net realized and unrealized gains related to changes in fair value of derivative instruments						54,300		54,300		30,600
Cumulative unrealized currency translation adjustment on assets and liabilities denominated in foreign currencies						87,100		87,100		60,300
Multifamily [Member] | Joint Venture [Member]
Class of Stock [Line Items]
Total equity						48,100		48,100		42,300
Equity interests owned by Blackstone Mortgage Trust, Inc.						40,900		40,900		36,000
Non-controlling interests						$ 7,200		$ 7,200		$ 6,300
Dividend Reinvestment and Direct Stock Purchase Plan [Member]
Class of Stock [Line Items]
Reserved for issuance of class A common stock						9,995,647		9,995,647			10,000,000
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares issued under dividend reinvestment program						403	428	1,279	971
Number of shares sold during period				6,900,000				11,483,135
Net proceeds from issuance of class A common stock				$ 222,275				$ 369,787
ATM Agreements [Member] | Class A Common Stock [Member]
Class of Stock [Line Items]
Aggregate sales price			$ 200,000
Number of shares sold during period								4,583,135	0
Net proceeds from issuance of class A common stock								$ 147,512
Aggregate sales price remaining available						$ 38,600		$ 38,600

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Equity - Summary of Class A Common Stock Issuances (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		9 Months Ended
	Aug. 31, 2018	May 31, 2013	Sep. 30, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Shares issued		25,875,000	11,484,414	971
Share issue price			$ 32.73
Net proceeds			$ 369,787	$ 31
Class A Common Stock [Member]
Class of Stock [Line Items]
Shares issued	6,900,000		11,483,135
Share issue price	$ 32.60		$ 32.65
Net proceeds	$ 222,275		$ 369,787
Class A Common Stock [Member] | ATM Agreements [Member]
Class of Stock [Line Items]
Shares issued			4,583,135	0
Share issue price			$ 32.73
Net proceeds			$ 147,512

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Equity - Summary of Class A Common Stock Issuances (Parenthetical) (Detail) - $ / shares	8 Months Ended	9 Months Ended
	Aug. 31, 2018	Sep. 30, 2018
Equity [Abstract]
Share issue price		$ 32.73
Net proceeds after sales discounts and commissions	$ 32.24	$ 32.26

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Equity - Schedule of Movement in Outstanding Shares of Class A Common Stock, Restricted Class A Common Stock and Deferred Stock Units (Detail) - shares	1 Months Ended	9 Months Ended
	May 31, 2013	Sep. 30, 2018	Sep. 30, 2017
Equity [Abstract]
Beginning balance		108,081,077	94,709,290
Issuance of class A common stock	25,875,000	11,484,414	971
Issuance of restricted class A common stock, net		300,921	286,773
Issuance of deferred stock units		23,730	20,560
Ending balance		119,890,142	95,017,594

XML

Equity - Schedule of Movement in Outstanding Shares of Class A Common Stock, Restricted Class A Common Stock and Deferred Stock Units (Parenthetical) (Detail) - Class A Common Stock [Member] - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Deferred stock units held by directors	220,947	189,587	220,947	189,587
Common stock, shares issued under dividend reinvestment program	403	428	1,279	971

XML

Equity - Schedule of Dividend Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 14, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Equity [Abstract]
Dividends declared per share of common stock	$ 0.62	$ 0.62	$ 0.62	$ 1.86	$ 1.86
Total dividends declared		$ 74,195	$ 58,793	$ 210,369	$ 176,374

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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		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 78,165	$ 57,722	$ 211,436	$ 159,741
Weighted-average shares outstanding, basic and diluted	116,203,140	95,013,087	111,251,864	95,004,188
Per share amount, basic and diluted	$ 0.67	$ 0.61	$ 1.90	$ 1.68

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Other Expenses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
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 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	$ 18,368	$ 13,243	$ 56,248	$ 40,557
Accrued management and incentive fees payable	18,368		18,368		$ 14,284
Manager [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Management fees	12,100	9,500	34,200	28,600
Total incentive compensation payments	6,300	$ 3,700	22,000	$ 11,900
Accrued management and incentive fees payable	$ 18,400		$ 18,400		$ 14,300

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Other Expenses - Schedule of General and Administrative Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Income and Expenses [Abstract]
Professional services	$ 1,022	$ 933	$ 3,383	$ 2,811
Operating and other costs	687	489	2,026	1,424
Subtotal	1,709	1,422	5,409	4,235
Non-cash compensation expenses
Restricted class A common stock earned	6,609	5,819	20,113	17,496
Director stock-based compensation	125	125	375	313
Subtotal	6,734	5,944	20,488	17,809
Total BXMT expenses	8,443	7,366	25,897	22,044
Other expenses		53		175
Total general and administrative expenses	$ 8,443	$ 7,419	$ 25,897	$ 22,219

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Other Expenses - Schedule of General and Administrative Expenses (Parenthetical) (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Multifamily [Member] | Joint Venture [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Expenses related Multifamily Joint Venture.	$ 77,000	$ 112,000	$ 302,000	$ 112,000

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Income Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2013	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
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		$ 48,000	$ 83,000	$ 272,000	$ 265,000
Deferred tax assets		0		0		$ 0
Deferred tax liabilities		0		$ 0		$ 0
U.S. federal corporate income tax rate				21.00%		35.00%
Common stock, shares issued	25,875,000			11,484,414	971
Net operating losses carried forward						$ 159,000,000
NOLs expiration date						Dec. 31, 2029
Open tax year				2015 2016 2017
Internal Revenue Service [Member]
Tax Credit Carryforward [Line Items]
Net operating losses limit per annum		$ 2,000,000		$ 2,000,000
Net operating losses limitations				The availability of our NOLs is generally limited to $2.0 million per annum

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Stock-Based Incentive Plans - Additional Information (Detail) $ / shares in Units, $ in Millions		3 Months Ended
	Sep. 30, 2018 USD ($) Plans shares	Sep. 30, 2018 USD ($) Plans shares	Jun. 29, 2018 $ / shares	Dec. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of benefit plans | Plans	9	9
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	1,380,855	1,380,855		1,484,175
Unrecognized compensation cost relating to nonvested share-based compensation | $	$ 33.9	$ 33.9
Unrecognized compensation cost expected to be recognized over weighted average period	1 year
Nonvested share-based compensation, closing price | $ / shares			$ 31.43
Stock Incentive Current Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available under plan	0	0
Maximum number of shares available under plan	5,000,000	5,000,000
Expired Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available under plan	0	0
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	448,474	448,474
Vest in 2019 [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	616,168	616,168
Vest in 2020 [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	316,213	316,213

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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]	9 Months Ended
	Sep. 30, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Class A Common Stock, Beginning Balance | shares	1,484,175
Restricted Class A Common Stock, Granted | shares	318,741
Restricted Class A Common Stock, Vested | shares	(404,241)
Restricted Class A Common Stock, Forfeited | shares	(17,820)
Restricted Class A Common Stock, Ending Balance | shares	1,380,855
Weighted-Average Grant Date Fair Value Per Share, Beginning Balance | $ / shares	$ 30.61
Weighted-Average Grant Date Fair Value Per Share, Granted | $ / shares	31.83
Weighted-Average Grant Date Fair Value Per Share, Vested | $ / shares	28.89
Weighted-Average Grant Date Fair Value Per Share, Forfeited | $ / shares	30.44
Weighted-Average Grant Date Fair Value Per Share, Ending Balance | $ / shares	$ 31.40

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Fair Values - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Derivatives	$ 2,719	$ 1,214
Liabilities
Derivatives	3,676	4,911
Recurring [Member]
Assets
Derivatives	2,719	1,214
Liabilities
Derivatives	3,676	4,911
Level 2 [Member] | Recurring [Member]
Assets
Derivatives	2,719	1,214
Liabilities
Derivatives	$ 3,676	$ 4,911

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Fair Values - Schedule of Details of Book Value, Face Amount, and Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financial assets
Cash and cash equivalents, face amount	$ 86,987	$ 69,654	$ 61,221
Restricted cash		32,864
Loans receivable, net, face amount	12,260,103	10,108,226
Debt securities held-to-maturity	96,050
Debt securities held-to-maturity	99,000
Financial liabilities
Secured debt agreements, net, face amount	6,862,256	5,290,536
Loan participations sold, net	81,044	80,415
Loan participations sold, net, face amount	106,259	141,119
Securitized debt obligations, net	1,284,362	1,282,412
Securitized debt obligations, net,face amount	1,292,120	1,292,120
Book Value [Member]
Financial assets
Cash and cash equivalents	86,987	69,654
Restricted cash		32,864
Loans receivable, net	12,176,516	10,056,732
Debt securities held-to-maturity	96,050
Financial liabilities
Secured debt agreements, net	6,841,759	5,273,855
Loan participations sold, net	81,044	80,415
Securitized debt obligations, net	1,284,362	1,282,412
Convertible notes, net	780,951	563,911
Fair Value [Member]
Financial assets
Cash and cash equivalents	86,987	69,654
Restricted cash		32,864
Loans receivable, net	12,261,013	10,112,331
Debt securities held-to-maturity	97,607
Financial liabilities
Secured debt agreements, net	6,862,256	5,290,536
Loan participations sold, net	81,170	80,706
Securitized debt obligations, net	1,297,032	1,292,589
Convertible notes, net	832,407	610,201
Convertible Senior Note [Member]
Financial liabilities
Convertible notes, net, face amount	794,828	575,000
Senior Participation [Member]
Financial liabilities
Loan participations sold, net	81,044	80,415
Loan participations sold, net, face amount	$ 81,170	$ 80,706

XML

Variable Interest Entities - Summary of Assets and Liabilities of Consolidated CLO and 2017 Single Asset Securitization VIE (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Assets	$ 1,500,000	$ 1,500,000
VIE [Member]
Assets:
Assets	1,504,899	1,502,407
Liabilities:
Liabilities	1,286,231	1,283,791
VIE [Member] | Loans Receivable [Member]
Assets:
Assets	1,500,000	1,500,000
VIE [Member] | Other Assets [Member]
Assets:
Assets	4,899	2,407
VIE [Member] | Securitized Debt Obligations, Net [Member]
Liabilities:
Liabilities	1,284,362	1,282,412
VIE [Member] | Other Liabilities [Member]
Liabilities:
Liabilities	$ 1,869	$ 1,379

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Variable Interest Entities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Jul. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Variable Interest Entity [Line Items]
Loan contributed to securitization	$ 517,500
Subordinate risk retention interest notional amount	99,000
Single asset securitization principal amount		$ 1,000,000		$ 474,600
2018 Single Asset Securitization [Member]
Variable Interest Entity [Line Items]
Single asset securitization principal amount	1,000,000
Maximum exposure to loss	96,100
Collateral Assets [Member]
Variable Interest Entity [Line Items]
Single asset securitization principal amount	1,678,963		$ 1,656,406
Collateral Assets [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Single asset securitization principal amount	$ 1,000,000		$ 1,000,000

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Transactions with Related Parties - Additional Information (Detail) € in Billions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($) shares	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) SecurityLoan shares	Sep. 30, 2017 USD ($) SecurityLoan	Dec. 31, 2017 USD ($) SecurityLoan shares	Jul. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 EUR (€)	Jun. 30, 2017 USD ($)
Related Party Transaction [Line Items]
Accrued management and incentive fees payable	$ 18,368,000		$ 18,368,000		$ 14,284,000
Common stock value	1,197,000		1,197,000		1,079,000
Non-cash expenses			20,488,000	$ 17,809,000
Loan face amount	$ 12,260,103,000		$ 12,260,103,000		$ 10,108,226,000
Number of Loans | SecurityLoan			112		110
Fully subscribed offering costs						$ 1,000,000,000				$ 474,600,000
Senior Term Facility [Member]
Related Party Transaction [Line Items]
Loan face amount | €									€ 7.3
Senior term facility | €									€ 1.0
Minority participation in senior term facility								14.00%	14.00%
Third-Party Service Provider [Member]
Related Party Transaction [Line Items]
Administrative services expenses incurred		$ 87,000		254,000
Restricted Class A Common Stock [Member]
Related Party Transaction [Line Items]
Shares held | shares	1,380,855		1,380,855		1,484,175
Restricted shares, vesting period	3 years
Manager [Member]
Related Party Transaction [Line Items]
Management Agreement expiration date			Dec. 19, 2017
Management Agreement renewal term, description			The current term of which expires on December 19, 2018, and will be automatically renewed for a one-year term upon such date and each anniversary thereafter unless earlier terminated.
Management Agreement renewal term, period			1 year
Accrued management and incentive fees payable	$ 18,400,000		$ 18,400,000		$ 14,300,000
Management fees paid to Manager	22,400,000	14,400,000	52,200,000	40,100,000
Expenses reimbursed to Manager	$ 167,000	59,000	$ 572,000	$ 325,000
Number of Loans | SecurityLoan			3	5
Expenses incurred on insurance agency transaction of affiliate with loan borrower			$ 0	$ 0
Income received on insurance agency transaction of affiliate with loan borrower			$ 0	0
Securitized debt obligations issued, aggregate amount						$ 116,100,000				$ 72,900,000
Manager [Member] | Senior Loan [Member]
Related Party Transaction [Line Items]
Loan face amount							$ 1,000,000,000	$ 330,000,000
Manager [Member] | Senior Loan [Member] | Partially Owned Properties [Member]
Related Party Transaction [Line Items]
Ownership interest in joint venture							50.00%
Manager [Member] | Class A Common Stock [Member] | Restricted Class A Common Stock [Member]
Related Party Transaction [Line Items]
Shares held | shares	675,333		675,333
Common stock value	$ 21,200,000		$ 21,200,000
Non-cash expenses	$ 3,200,000	$ 2,900,000	9,600,000	8,700,000
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]
Related Party Transaction [Line Items]
Special servicing fees			0	$ 0
Affiliates of Manager [Member] | Third-Party Service Provider [Member]
Related Party Transaction [Line Items]
Administrative services expenses incurred	$ 90,000		$ 384,000
Blackstone-Advised Investment Vehicles, or the Funds [Member] | Senior Term Facility [Member]
Related Party Transaction [Line Items]
Ownership interest in joint venture								51.00%	51.00%

XML

Commitments and Contingencies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2018 USD ($) Loans Directors	Dec. 31, 2017 USD ($)
Commitments And Contingencies [Line Items]
Number of loans receivable | Loans	80
Number of independent directors entitled to annual compensation | Directors	5
Loans Receivable [Member]
Commitments And Contingencies [Line Items]
Unfunded loan commitments	$ 3,046,350,000	$ 1,573,107,000
Five Independent Board of Directors [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	175,000
Annual cash compensation paid in cash	75,000
Annual cash compensation paid in the form of deferred stock units	100,000
Chairperson of Audit Committee [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	20,000
Audit Committee Members [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	10,000
Compensation and Corporate Governance Committees [Member]
Commitments And Contingencies [Line Items]
Annual cash compensation	$ 10,000

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Commitments and Contingencies - Schedule of Principal Contractual Obligations (Detail) $ in Thousands	Sep. 30, 2018 USD ($)
Debt Instrument [Line Items]
Total Obligation	$ 7,657,084
Less Than 1 Year	445,582
1 to 3 Years	2,393,008
3 to 5 Years	4,735,294
More Than 5 Years	83,200
Secured Debt [Member]
Debt Instrument [Line Items]
Total Obligation	6,862,256
Less Than 1 Year	273,254
1 to 3 Years	2,393,008
3 to 5 Years	4,112,794
More Than 5 Years	83,200
Convertible Debt [Member]
Debt Instrument [Line Items]
Total Obligation	794,828
Less Than 1 Year	172,328
3 to 5 Years	$ 622,500

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Commitments and Contingencies - Schedule of Principal Contractual Obligations (Parenthetical) (Detail) $ in Millions	Sep. 30, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Loan participations sold excluded from contractual obligations	$ 81.2
Non-consolidated senior interests excluded from contractual obligations	466.7
Securitized debt obligations excluded from contractual obligations	$ 1,300.0