Javelin Mortgage Investment (JMI) 10-Q 6 Nov 15 2015 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 05, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	JAVELIN MORTGAGE INVESTMENT CORP.
Entity Central Index Key	1,552,890
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		11,924,443

Condensed Consolidated Balance

Condensed Consolidated Balance Sheet - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Cash	$ 20,271	$ 29,882
Cash collateral posted to counterparties	22,867	3,209
Agency Securities, available for sale, at fair value (including pledged securities of $641,073 and $1,071,298)	643,191	1,075,521
Non-Agency Securities, trading, at fair value (including pledged securities of $246,298 and $158,931)	246,370	158,931
Linked Transactions, net, at fair value (including pledged securities of $8,940 in 2014)	0	2,532
Derivatives, at fair value	627	7,321
Accrued interest receivable	1,667	2,792
Prepaid and other assets	873	713
Total Assets	935,866	1,280,901
Liabilities:
Repurchase agreements	798,938	1,134,387
Cash collateral posted by counterparties	0	2,876
Derivatives, at fair value	14,364	2,603
Accrued interest payable	551	696
Accounts payable and other accrued expenses	2,019	731
Total Liabilities	$ 815,872	$ 1,141,293
Commitments and Contingencies
Stockholders’ Equity:
Preferred stock, $0.001 par value, 25,000 shares authorized and none issued and outstanding at September 30, 2015 and December 31, 2014.	$ 0	$ 0
Common stock, $0.001 par value, 250,000 shares authorized, 11,924 shares and 11,985 shares issued and outstanding at September 30, 2015 and December 31, 2014.	12	12
Additional paid-in capital	243,418	243,892
Accumulated deficit	(129,144)	(112,899)
Accumulated other comprehensive income	5,708	8,603
Total Stockholders’ Equity	119,994	139,608
Total Liabilities and Stockholders’ Equity	$ 935,866	$ 1,280,901

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheet (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Agency securities pledged	$ 641,073	$ 1,071,298
Non-agency securities pledged	$ 246,298	$ 158,931
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	25,000,000	25,000,000
Preferred stock, shares issued (in Shares)	0	0
Preferred stock, shares outstanding (in Shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock shares issued (in shares)	11,924,000	11,985,000
Common stock, shares outstanding (in shares)	11,924,000	11,985,000
Linked Transactions
Linked transactions pledged assets		$ 8,940

Condensed Consolidated Statemen

Condensed Consolidated Statement of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest Income:
Agency Securities, net of amortization of premium		$ 4,626	$ 7,246	$ 15,102	$ 23,722
Non-Agency Securities, including discount accretion		3,389	2,478	9,106	7,190
Total Interest Income		8,015	9,724	24,208	30,912
Interest expense		(1,749)	(1,698)	(4,710)	(4,997)
Net Interest Income		6,266	8,026	19,498	25,915
Other Income (Loss):
Realized gain (loss) on sale of Agency Securities (reclassified from Other comprehensive income (loss))		797	(845)	5,065	7,931
Gain (loss) on Non-Agency Securities		(2,127)	1,571	1,149	2,692
Unrealized net gain and net interest income from Linked Transactions		0	1,145	0	8,604
Subtotal		(1,330)	1,871	6,214	19,227
Realized loss on derivatives	[1]	(703)	(3,131)	(4,071)	(9,334)
Unrealized gain (loss) on derivatives		(18,925)	1,293	(21,803)	(34,439)
Subtotal		(19,628)	(1,838)	(25,874)	(43,773)
Total Other Income (Loss)		(20,958)	33	(19,660)	(24,546)
Expenses:
Management fee		899	914	2,700	2,742
Professional fees		410	136	1,102	1,300
Insurance		101	112	298	333
Board compensation		179	179	536	536
Other		247	146	688	525
Total Expenses		1,836	1,487	5,324	5,436
Net Income (Loss)		$ (16,528)	$ 6,572	$ (5,486)	$ (4,067)
Net income (loss) per common share (in usd per share)		$ (1.39)	$ 0.55	$ (0.46)	$ (0.34)
Dividends declared per common share (in usd per share)		$ 0.27	$ 0.45	$ 0.90	$ 1.35
Weighted average common shares outstanding (in shares)		11,917	11,999	11,953	11,996
[1]	Interest expense related to our interest rate swap contracts is recorded in realized loss on derivatives on the statements of operations. For additional information see Note 10 to the condensed consolidated financial statements.

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (16,528)	$ 6,572	$ (5,486)	$ (4,067)
Other comprehensive income (loss):
Reclassification adjustment for realized (gain) loss on sale of available for sale Agency Securities	(797)	845	(5,065)	(7,931)
Net unrealized gain (loss) on available for sale Agency Securities	7,347	(8,551)	2,170	11,044
Other comprehensive income (loss)	6,550	(7,706)	(2,895)	3,113
Comprehensive Loss	$ (9,978)	$ (1,134)	$ (8,381)	$ (954)

Condensed Consolidated Stateme6

Condensed Consolidated Statement of Stockholders' Equity - 9 months ended Sep. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in Shares) at Dec. 31, 2014		11,985
Beginning Balance at Dec. 31, 2014	$ 139,608	$ 12	$ 243,892	$ (112,899)	$ 8,603
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends declared	(10,759)			(10,759)
Issuance of common stock, net (in Shares)		1
Issuance of common stock, net	7		7
Stock based compensation, net of withholding requirements (in Shares)		19
Stock based compensation, net of withholding requirements	131		131
Common stock repurchased (in shares)		(81)
Common stock repurchased	(612)		(612)
Net Income (Loss)	(5,486)			(5,486)
Other comprehensive loss	(2,895)				(2,895)
Ending Balance (in Shares) at Sep. 30, 2015		11,924
Ending Balance at Sep. 30, 2015	$ 119,994	$ 12	$ 243,418	$ (129,144)	$ 5,708

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows From Operating Activities:
Net Income (Loss)	$ (5,486,000)	$ (4,067,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Net amortization of premium on Agency Securities	2,855,000	2,895,000
Accretion of net discount on Non-Agency Securities	(292,000)	(322,000)
Gain on Non-Agency Securities	(1,149,000)	(2,692,000)
Realized gain on sale of Agency Securities	(5,065,000)	(7,931,000)
Unrealized net gain and net interest income from Linked Transactions	0	(8,604,000)
Stock based compensation	131,000	132,000
Changes in operating assets and liabilities:
(Increase) decrease in accrued interest receivable	1,125,000	(320,000)
Increase in prepaid and other assets	(160,000)	(202,000)
Decrease in derivatives, at fair value	18,455,000	35,674,000
Increase (decrease) in accrued interest payable	(168,000)	297,000
Increase (decrease) in accounts payable and other accrued expenses	1,288,000	(1,269,000)
Net cash provided by operating activities	11,534,000	13,591,000
Cash Flows From Investing Activities:
Purchases of Agency Securities	(128,908,000)	(1,214,850,000)
Purchases of Non-Agency Securities	(97,027,000)	(25,897,000)
Cash receipts on Linked Transactions	0	5,075,000
Principal repayments of Agency Securities	59,701,000	78,096,000
Principal repayments of Non-Agency Securities	19,968,000	10,889,000
Proceeds from sales of Agency Securities	500,852,000	927,361,000
Increase in cash collateral posted to/by counterparties	(22,534,000)	(33,694,000)
Net cash provided by (used in) investing activities	332,052,000	(253,020,000)
Cash Flows From Financing Activities:
Issuance of common stock, net of expenses	7,000	0
Proceeds from repurchase agreements	4,614,455,000	5,822,290,000
Principal repayments on repurchase agreements	(4,956,288,000)	(5,570,695,000)
Common stock dividends paid	(10,759,000)	(16,195,000)
Common stock repurchased	(612,000)	0
Net cash provided by (used in) financing activities	(353,197,000)	235,400,000
Net decrease in cash	(9,611,000)	(4,029,000)
Cash - beginning of period	29,882,000	41,524,000
Cash - end of period	20,271,000	37,495,000
Supplemental Disclosure:
Cash paid during the period for interest	13,818,000	14,100,000
Non-Cash Investing and Financing Activities:
Receivable for unsettled sales	0	102,163,000
Net unrealized gain (loss) on available for sale Agency Securities	2,170,000	11,044,000
Linked Transaction value of purchased Non-Agency Securities	$ 2,532,000	$ 7,280,000

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the nine months ended September 30, 2015 are not necessarily indicative of the results that may be expected for the calendar year ending December 31, 2015 . These unaudited financial statements should be read in conjunction with the audited financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014 . The condensed consolidated financial statements include the accounts of JAVELIN Mortgage Investment Corp. and its subsidiary. All intercompany accounts and transactions have been eliminated. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant estimates affecting the accompanying condensed consolidated financial statements include the valuation of MBS (as described below) and derivative instruments.

Organization and Nature of Busi

Organization and Nature of Business Operations	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of Business Operations	Organization and Nature of Business Operations References to “we,” “us,” “our,” "JAVELIN" or the “Company” are to JAVELIN Mortgage Investment Corp. References to "ACM" are to ARMOUR Capital Management LP, a Delaware limited partnership, formerly known as ARMOUR Residential Management LLC. On December 19, 2014, ARMOUR Residential Management LLC, our external manager under the Management Agreement (as defined below), changed its name to ARMOUR Capital Management LP and converted from a Delaware limited liability company to a Delaware limited partnership, and continued as the manager under the same Management Agreement (the “Conversion”). We are an externally managed Maryland corporation managed by ACM, an investment advisor registered with the SEC (see Note 11 , “ Commitments and Contingencies ” and Note 16 , “ Related Party Transactions ” for additional discussion). We invest primarily in fixed rate and hybrid adjustable rate mortgage backed securities. Some of these securities may be issued or guaranteed by a United States (“U.S.”) Government-sponsored entity (“GSE”), such as the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac), or guaranteed by the Government National Mortgage Administration (Ginnie Mae) (collectively, “Agency Securities”). Other securities backed by residential mortgages in which we invest, for which the payment of principal and interest is not guaranteed by a GSE or government agency (collectively, “Non-Agency Securities” and together with Agency Securities, “MBS”), may benefit from credit enhancement derived from structural elements such as subordination, over collateralization or insurance. We also may invest in collateralized commercial mortgage backed securities and other mortgage related investments, including mortgage loans, mortgage related derivatives and mortgage servicing rights. From time to time, a portion of our assets may be invested in unsecured notes and bonds issued by GSEs, U.S. Treasuries and money market instruments, subject to certain income tests we must satisfy for our qualification as a real estate investment trust (“REIT”). Our charter permits us to invest in Agency Securities and Non-Agency Securities. We have elected to be taxed as a REIT under the Internal Revenue Code, as amended (the “Code”). Our qualification as a REIT depends on our ability to meet, on a continuing basis, various complex requirements under the Code relating to, among other things, the sources of our gross income, the composition and values of our assets, our distribution levels and the concentration of ownership of our capital stock. We believe that we are organized in conformity with the requirements for qualification as a REIT under the Code and our manner of operations enables us to meet the requirements for taxation as a REIT for federal income tax purposes. As a REIT, we will generally not be subject to federal income tax on the taxable REIT income that we currently distribute to our stockholders. If we fail to qualify as a REIT in any taxable year and do not qualify for certain statutory relief provisions, we will be subject to federal income tax at regular corporate rates. Even if we qualify as a REIT for federal income tax purposes, we may still be subject to some federal, state and local taxes on our income.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Cash Cash includes cash on deposit with financial institutions. We may maintain deposits in federally insured financial institutions in excess of federally insured limits. However, management believes we are not exposed to significant credit risk due to the financial position and creditworthiness of the depository institutions in which those deposits are held. Cash Collateral Posted To/By Counterparties Cash collateral posted to/by counterparties represents cash posted by us to counterparties or posted by counterparties to us as collateral for our interest rate swap contracts (including swaptions) and repurchase agreements on our MBS and our Agency Securities purchased or sold on a to-be-announced basis ("TBA Agency Securities"). MBS, at Fair Value We generally intend to hold most of our MBS for extended periods of time. We may, from time to time, sell any of our MBS as part of the overall management of our MBS portfolio. Management determines the appropriate classifications of the securities at the time they are acquired and evaluates the appropriateness of such classifications at each balance sheet date. Purchases and sales of our MBS are recorded on the trade date. However, in 2014, if on the purchase settlement date, a repurchase agreement was used to finance the purchase of an MBS with the same counterparty and such transaction was determined to be linked, then the MBS and linked repurchase borrowing were reported on the same settlement date as Linked Transactions (see below). Agency Securities, Available For Sale At September 30, 2015 and December 31, 2014 , all of our Agency Securities were classified as available for sale securities. Agency Securities classified as available for sale are reported at their estimated fair values with unrealized gains and losses excluded from earnings and reported as part of the statements of comprehensive income (loss). We evaluate Agency Securities for other than temporary impairment at least on a quarterly basis and more frequently when economic or market concerns warrant such evaluation. We consider an impairment to be other than temporary if we (1) have the intent to sell the Agency Securities, (2) believe it is more likely than not that we will be required to sell the securities before recovery (for example, because of liquidity requirements or contractual obligations) or (3) a credit loss exists. Impairment losses recognized establish a new cost basis for the related Agency Securities. Non-Agency Securities, Trading At September 30, 2015 and December 31, 2014 , all of our Non-Agency Securities were classified as trading securities. Non-Agency Securities classified as trading are reported at their estimated fair values with unrealized gains and losses included in other income (loss) as a component of the statements of operations. We estimate future cash flows for each Non-Agency Security and then discount those cash flows based on our estimates of current market yield for each individual security. We then compare our calculated price with our pricing services and/or dealer marks. Our estimates for future cash flows and current market yields incorporate such factors as coupons, prepayment speeds, defaults, delinquencies and severities. Receivables and Payables for Unsettled Sales and Purchases We account for purchases and sales of securities on the trade date, including purchases and sales for forward settlement. Receivables and payables for unsettled trades represent the agreed trade price multiplied by the outstanding balance of the securities at the balance sheet date. Accrued Interest Receivable and Payable Accrued interest receivable includes interest accrued between payment dates on MBS. Accrued interest payable includes interest payable on our repurchase agreements. Repurchase Agreements We finance the acquisition of our MBS through the use of repurchase agreements. Our repurchase agreements are secured by our MBS and bear interest rates that have historically moved in close relationship to the Federal Funds Rate and the London Interbank Offered Rate (“LIBOR”). Under these repurchase agreements, we sell MBS to a lender and agree to repurchase the same MBS in the future for a price that is higher than the original sales price. The difference between the sales price that we receive and the repurchase price that we pay represents interest paid to the lender. A repurchase agreement operates as a financing arrangement (with the exception of repurchase agreements accounted for as a component of a Linked Transaction described below) under which we pledge our MBS as collateral to secure a loan which is equal in value to a specified percentage of the estimated fair value of the pledged collateral. We retain beneficial ownership of the pledged collateral. At the maturity of a repurchase agreement, we are required to repay the loan and concurrently receive back our pledged collateral from the lender or, with the consent of the lender, we may renew such agreement at the then prevailing interest rate. The repurchase agreements may require us to pledge additional assets to the lender in the event the estimated fair value of the existing pledged collateral declines. In addition to the repurchase agreement financing discussed above we have entered into reverse repurchase agreements with certain of our repurchase agreement counterparties. Under a typical reverse repurchase agreement, we purchase U.S. Treasury Securities from a borrower in exchange for cash and agree to sell the same securities in the future in exchange for a price that is higher than the original purchase price. The difference between the purchase price originally paid and the sale price represents interest received from the borrower. Reverse repurchase agreement receivables and repurchase agreement liabilities are presented net when they meet certain criteria, including being with the same counterparty, being governed by the same master repurchase agreement ("MRA"), settlement through the same brokerage or clearing account and maturing on the same day. We did not have any reverse repurchase agreements outstanding at September 30, 2015 or December 31, 2014 . Obligations to Return Securities Received as Collateral, at Fair Value At certain times, we also sell to third parties the U.S. Treasury Securities received as collateral for reverse repurchase agreements and recognize the resulting obligation to return said U.S. Treasury Securities as a liability on our condensed consolidated balance sheets. Interest is recorded on the repurchase agreements, reverse repurchase agreements and U.S. Treasury Securities sold short on an accrual basis and presented as net interest expense. Both parties to the transaction have the right to make daily margin calls based on changes in the fair value of the collateral received and/or pledged. We did not have any obligations to return securities received as collateral at September 30, 2015 or December 31, 2014 . Derivatives, at Fair Value We recognize all derivatives as either assets or liabilities at fair value on our condensed consolidated balance sheets. All changes in the fair values of our derivatives are reflected in our condensed consolidated statements of operations. We designate derivatives as hedges for tax purposes and any unrealized derivative gains or losses would not affect our distributable net taxable income. These transactions include interest rate swap contracts and interest rate swaptions. We also utilize forward contracts for the purchase or sale of TBA Agency Securities. We account for TBA Agency Securities as derivative instruments if it is reasonably possible that we will not take or make physical delivery of the Agency Security upon settlement of the contract. We account for TBA dollar roll transactions as a series of derivative transactions. We may also purchase and sell TBA Agency Securities as a means of investing in and financing Agency Securities (thereby increasing our "at risk" leverage) or as a means of disposing of or reducing our exposure to Agency Securities (thereby reducing our "at risk" leverage). Pursuant to TBA Agency Securities, we agree to purchase or sell, for future delivery, Agency Securities with certain principal and interest terms and certain types of collateral, but the particular Agency Securities to be delivered are not identified until shortly before the TBA settlement date. We may also choose, prior to settlement, to move the settlement of these securities out to a later date by entering into an offsetting short or long position (referred to as a "pair off"), net settling the paired off positions for cash, and simultaneously purchasing or selling a similar TBA Agency Security for a later settlement date. This transaction is commonly referred to as a "dollar roll." When it is reasonably possible that we will pair off a TBA Agency Security, we account for that contract as a derivative. Linked Transactions Through December 31, 2014 , the initial purchase of Non-Agency Securities and the related contemporaneous repurchase financing of such MBS with the same counterparty were considered part of the same arrangement, or a “Linked Transaction,” when certain criteria were met. Our acquisition of a Non-Agency Security and a related repurchase financing provided by the seller are generally considered to be linked if the initial transfer of and repurchase financing are contractually contingent, or there is a limited secondary market for the purchased security. The components of a Linked Transaction are evaluated on a combined basis and in totality, accounted for as a forward contract and reported as “Linked Transactions” on our balance sheets. Changes in the fair value of the Non-Agency Securities and repurchase liabilities underlying the Linked Transactions and associated interest income and expense are reported as “unrealized net gains/(losses) and net interest income (loss) from Linked Transactions” on our statements of operations and are not included in other comprehensive income (loss). When the linking criteria are no longer met, the initial transfer (i.e., the purchase of a security) and repurchase financing will no longer be treated as a Linked Transaction and will be evaluated and reported separately as a MBS purchase and repurchase financing. See Note 4 , " Recent Accounting Pronouncements ." Preferred Stock At September 30, 2015 , we were authorized to issue up to 25,000 shares of preferred stock, par value $0.001 per share, with such designations, voting and other rights and preferences as may be determined from time to time by our Board of Directors ("Board") or a committee thereof. We have not issued any preferred stock to date. Common Stock At September 30, 2015 , we were authorized to issue up to 250,000 shares of common stock, par value $0.001 per share, with such designations, voting and other rights and preferences as may be determined from time to time by our Board. We had 11,924 shares of common stock issued and outstanding at September 30, 2015 and 11,985 issued and outstanding at December 31, 2014 . Common Stock Repurchased On March 5, 2014, our Board increased the authorization under the Repurchase Program to 3,000 shares of our common stock outstanding (the “Repurchase Program”). Under the Repurchase Program, shares may be purchased in the open market, including block trades, through privately negotiated transactions, or pursuant to a trading plan separately adopted in the future. The timing, manner, price and amount of any repurchases will be at our discretion, subject to the requirements of the Securities Exchange Act of 1934, as amended, and related rules. We are not required to repurchase any shares under the Repurchase Program and it may be modified, suspended or terminated at any time for any reason. We do not intend to purchase shares from our Board or other affiliates. Under Maryland law, such repurchased shares are treated as authorized but unissued. During the nine months ended September 30, 2015 , we repurchased 81 shares of our common stock under the Repurchase Program for an aggregate of $612 . At September 30, 2015 , there were 1,358 authorized shares remaining under our Repurchase Program. Revenue Recognition Security purchase and sale transactions, including purchase of TBA Agency Securities, are recorded on the trade date to the extent it is probable that we will take or make timely physical delivery of the related securities. Gains or losses realized from the sale of securities are included in income and are determined using the specific identification method. Interest income is earned and recognized on Agency Securities based on their unpaid principal amounts and their contractual terms. Recognition of interest income commences on the settlement date of the purchase transaction and continues through the settlement date of the sale transaction. Premiums and discounts associated with the purchase of Multi-Family MBS, which are generally not subject to prepayment, are amortized or accreted into interest income over the contractual lives of the securities using a level yield method. Premiums and discounts associated with the purchase of other Agency Securities are amortized or accreted into interest income over the actual lives of the securities, reflecting actual prepayments as they occur. Interest income on Non-Agency Securities is recognized using the effective yield method over the life of the securities based on the future cash flows expected to be received. Future cash flow projections and related effective yields are determined for each security and updated quarterly. Other than temporary impairments, which establish a new cost basis in the security for purposes of calculating effective yields, are recognized when the fair value of a security is less than its cost basis and there has been an adverse change in the future cash flows expected to be received. Other changes in future cash flows expected to be received are recognized prospectively over the remaining life of the security. Comprehensive Income (Loss) Comprehensive income (loss) refers to changes in equity during a period from transactions and other events and circumstances from non-owner sources. It includes all changes in equity during a period, except those resulting from investments by owners and distributions to owners.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2015
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In June 2014, the Financial Accounting Standards Board released ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures, Transfers and Servicing (Topic 860) . This amendment to the accounting standards changed the accounting for repurchase financing transactions, that is, a transfer of a financial asset financed by a repurchase agreement with the same counterparty. In 2014, certain of these transactions were combined and accounted for as a forward contract and are reported as "Linked Transactions" on our balance sheet. Under the amendment, these arrangements are no longer presented as Linked Transactions on our condensed consolidated balance sheet but are instead accounted for from inception as purchases of Non-Agency trading securities and repurchase agreement liabilities. The amendment also changes the accounting for repurchase-to-maturity transactions to secured borrowing accounting. We do not currently have, and do not contemplate having, repurchase-to-maturity transactions. The accounting changes were effective for the Company beginning on January 1, 2015, early adoption was prohibited. In 2014, we continued to account for Linked Transactions and Non-Agency Securities all on a fair value basis. Accordingly, the adoption of this amendment had no effect on our results of operations or our accumulated deficit. The amendment also requires certain additional disclosures about repurchase agreements beginning with the second quarter 2015 condensed consolidated financial statements. See Note 9 , “ Repurchase Agreements . ”

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Our valuation techniques for financial instruments use observable and unobservable inputs. Observable inputs reflect readily obtainable data from third party sources, while unobservable inputs reflect management’s market assumptions. The Accounting Standards Codification Topic No. 820 “Fair Value Measurement,” classifies these inputs into the following hierarchy: Level 1 Input s - Quoted prices for identical instruments in active markets. Level 2 Inputs - Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 Inputs - Prices determined using significant unobservable inputs. Unobservable inputs may be used in situations where quoted prices or observable inputs are unavailable (for example, when there is little or no market activity for an investment at the end of the period). Unobservable inputs reflect management’s assumptions about the factors that market participants would use in pricing an asset or liability, and would be based on the best information available. The following describes the valuation techniques used for our assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy. Any transfers between levels are assumed to occur at the beginning of the reporting period. Cash - Cash includes cash on deposit with financial institutions. The carrying amount of cash is deemed to be its fair value and is classified as Level 1. Cash balances posted by us to counterparties or posted by counterparties to us as collateral are classified as Level 2 because they are integrally related to the Company's repurchase financing and interest rate swap agreements, which are classified as Level 2. Agency Securities, Available for Sale - Fair value for the Agency Securities in our MBS portfolio is based on obtaining a valuation for each Agency Security from third party pricing services and/or dealer quotes. The third party pricing services use common market pricing methods that may include pricing models that may incorporate such factors as coupons, prepayment speeds, spread to the Treasury curves and interest rate swap curves, duration, periodic and life caps and credit enhancement. If the fair value of an Agency Security is not available from the third party pricing services or such data appears unreliable, we obtain pricing indications from up to three dealers who make markets in similar Agency Securities. Management reviews pricing used to ensure that current market conditions are properly reflected. This review includes, but is not limited to, comparisons of similar market transactions or alternative third party pricing services, dealer pricing indications and comparisons to a third party pricing model. Fair values obtained from the third party pricing services for similar instruments are classified as Level 2 securities if the inputs to the pricing models used are consistent with the Level 2 definition. If quoted prices for a security are not reasonably available from the third party pricing service, but dealer pricing indications are, the security will be classified as a Level 2 security. If neither is available, management will determine the fair value based on characteristics of the security that we receive from the issuer and based on available market information and classify it as a Level 3 security. At September 30, 2015 and December 31, 2014 , all of our Agency Security fair values are classified as Level 2 based on the inputs used by our third party pricing services and dealer quotes. Non-Agency Securities Trading - The fair value for the Non-Agency Securities in our MBS portfolio is based on estimates prepared by our Portfolio Management group, which organizationally reports to our Chief Investment Officer. In preparing the estimates, our Portfolio Management group uses commercially available and proprietary models and data as well as market intelligence gained from discussions with, and transactions by, other market participants. We estimate the fair value of our Non-Agency Securities by estimating the future cash flows for each Non-Agency Security and then discounting those cash flows based on our estimates of current market yield for each individual security. Our estimates for future cash flows and current market yields incorporate such factors as collateral type, bond structure and priority of payments, coupons, prepayment speeds, defaults, delinquencies and severities. Quarterly, we compare our estimates of fair value of our Non-Agency Securities with pricing from third party pricing services, dealer marks received and recent purchase and financing transaction history to validate our assumptions of cash flow and market yield and calibrate our models. Fair values calculated in this manner are considered Level 3. At September 30, 2015 and December 31, 2014 , all of our Non-Agency Security fair values are calculated in this manner and therefore were classified as Level 3. Linked Transactions - Through December 31, 2014 , the Non-Agency Securities underlying our Linked Transactions were valued using similar techniques to those used for our other Non-Agency Securities. The value of the underlying Non-Agency Security was then netted against the carrying amount (which approximated fair value) of the repurchase agreement at the valuation date. The fair value of Linked Transactions also included accrued interest receivable on the Non-Agency Security and accrued interest payable on the underlying repurchase agreement. Our Linked Transactions were classified as Level 3 at December 31, 2014 . Receivables and Payables for Unsettled Sales and Purchases - The carrying amount is generally deemed to be fair value because of the relatively short time to settlement. Such receivables and payables are classified as Level 2 because they are effectively secured by the related securities and could potentially be subject to counterparty credit considerations. Repurchase Agreements - The fair value of repurchase agreements reflects the present value of the contractual cash flows discounted at the estimated LIBOR based market interest rates at the valuation date for repurchase agreements with a term equivalent to the remaining term to interest rate repricing, which may be at maturity, of our repurchase agreements. The fair value of the repurchase agreements approximates their carrying amount due to the short-term nature of these financial instruments. Our repurchase agreements are classified as Level 2. Obligations to Return Securities Received as Collateral - The fair value of the obligations to return securities received as collateral are based upon the prices of the related U.S. Treasury Securities obtained from a third party pricing service. Such obligations are classified as Level 1. Derivative Transactions - The fair values of our interest rate swap contracts and interest rate swaptions are valued using information provided by third party pricing services that may incorporate current interest rate curves, forward interest rate curves and market spreads to interest rate curves. We estimate the fair value of TBA Agency Securities based on similar methods used to value our Agency Securities. Management compares pricing information received to dealer quotes to ensure that the current market conditions are properly reflected. The fair values of our interest rate swap contracts, our interest rate swaptions and TBA Agency Securities are classified as Level 2. The following tables provide a summary of our assets and liabilities that are measured at fair value on a recurring basis at September 30, 2015 and December 31, 2014 . Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balance, September 30, 2015 Assets at Fair Value: Agency Securities, available for sale $ — $ 643,191 $ — $ 643,191 Non-Agency Securities, trading $ — $ — $ 246,370 $ 246,370 Derivatives $ — $ 627 $ — $ 627 Liabilities at Fair Value: Derivatives $ — $ 14,364 $ — $ 14,364 There were no transfers of assets or liabilities between Levels of the fair value hierarchy during the nine months ended September 30, 2015 . Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balance, December 31, 2014 Assets at Fair Value: Agency Securities, available for sale $ — $ 1,075,521 $ — $ 1,075,521 Non-Agency Securities, trading $ — $ — $ 158,931 $ 158,931 Linked Transactions, net $ — $ — $ 2,532 $ 2,532 Derivatives $ — $ 7,321 $ — $ 7,321 Liabilities at Fair Value: Derivatives $ — $ 2,603 $ — $ 2,603 There were no transfers of assets or liabilities between Levels of the fair value hierarchy during the year ended December 31, 2014 . The following tables provide a summary of the carrying values and fair values of our financial assets and liabilities not carried at fair value but for which fair value is required to be disclosed at September 30, 2015 and December 31, 2014 . September 30, 2015 Fair Value Measurements using: Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial Assets: Cash $ 20,271 $ 20,271 $ 20,271 $ — $ — Cash collateral posted to counterparties $ 22,867 $ 22,867 $ — $ 22,867 $ — Accrued interest receivable $ 1,667 $ 1,667 $ — $ 1,667 $ — Financial Liabilities: — Repurchase agreements $ 798,938 $ 798,938 $ — $ 798,938 $ — Accrued interest payable $ 551 $ 551 $ — $ 551 $ — December 31, 2014 Fair Value Measurements using: Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial Assets: Cash $ 29,882 $ 29,882 $ 29,882 $ — $ — Cash collateral posted to counterparties $ 3,209 $ 3,209 $ — $ 3,209 $ — Accrued interest receivable $ 2,792 $ 2,792 $ — $ 2,792 $ — Financial Liabilities: Repurchase agreements $ 1,134,387 $ 1,134,387 $ — $ 1,134,387 $ — Cash collateral posted by counterparties $ 2,876 $ 2,876 $ — $ 2,876 $ — Accrued interest payable $ 696 $ 696 $ — $ 696 $ — The following tables provide a summary of the changes in Level 3 assets measured at fair value on a recurring basis at September 30, 2015 and December 31, 2014 . Non-Agency Securities For the Nine Months Ended September 30, 2015 For the Year Ended December 31, 2014 Balance, beginning of period $ 158,931 $ 143,399 Purchases of Non-Agency Securities, at cost 97,027 32,397 Principal repayments of Non-Agency Securities (19,968 ) (15,494 ) Proceeds from the sale of Non-Agency Securities — (9,757 ) Gain on Non-Agency Securities 1,149 559 Linked Transactions value of purchased Non-Agency Securities 2,532 7,281 Linked Transactions liabilities recognized 6,407 — Discount accretion 292 546 Balance, end of period $ 246,370 $ 158,931 Gain on Non-Agency Securities $ 1,149 $ 559 Linked Transactions For the Nine Months Ended September 30, 2015 For the Year Ended December 31, 2014 Balance, beginning of period $ 2,532 $ 16,322 Linked Transaction value of purchased Non-Agency Securities (2,532 ) (7,281 ) Cash receipts on Linked Transactions — (16,839 ) Unrealized net gain and net interest income (loss) from Linked Transactions — 10,330 Balance, end of period $ — $ 2,532 Gain on Linked Transactions $ — $ 10,330 The significant unobservable inputs used in the fair value measurement of our Level 3 Non-Agency Securities (inclusive of Non-Agency Securities underlying Linked Transactions though December 31, 2014 ) include assumptions for underlying loan collateral, cumulative default rates and loss severities in the event of default, as well as discount rates. The following tables present the range of our estimates of cumulative default and loss severities, together with the discount rates implicit in our Level 3 Non-Agency Security fair values at September 30, 2015 and December 31, 2014 (inclusive of Non-Agency Securities underlying Linked Transactions), respectively. See Note 8, "Linked Transaction" for additional discussion of Non-Agency Securities that are accounted for as a component of Linked Transactions through December 31, 2014 . September 30, 2015 Unobservable Level 3 Input Minimum Weighted Average Maximum Cumulative default 0.00 % 16.12 % 68.10 % Loss severity (life) 0.00 % 37.84 % 66.70 % Discount rate 3.50 % 4.87 % 5.50 % Delinquency (life) 0.00 % 16.47 % 55.80 % Voluntary prepayments (life) 0.60 % 8.26 % 23.50 % December 31, 2014 Unobservable Level 3 Input Minimum Weighted Average Maximum Cumulative default 0.00 % 14.98 % 47.89 % Loss severity (life) 18.80 % 57.15 % 100.00 % Discount rate 4.60 % 5.44 % 6.50 % Delinquency (life) 0.00 % 13.51 % 46.30 % Voluntary prepayments (life) 5.20 % 9.02 % 15.50 % The tables above include the effects of the structural elements of our Non-Agency Securities (inclusive of Non-Agency Securities underlying Linked Transactions though December 31, 2014 ), such as subordination, over collateralization or insurance. Significant increases or decreases in any of these inputs in isolation would result in a significantly lower or higher fair value measurement. Generally, a change in the assumption used for the probability of cumulative default is accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for voluntary prepayment rates for the life of the security. However, given the interrelationship between loss estimates and the discount rate, overall Non-Agency Security market conditions would likely have a more significant impact on our Level 3 fair values than changes in any one unobservable input.

Agency Securities, Available fo

Agency Securities, Available for Sale	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Agency Securities, Available for Sale	Agency Securities, Available for Sale All of our Agency Securities are classified as available for sale securities and, as such, are reported at their estimated fair value and changes in fair value reported as part of the statements of comprehensive income. At September 30, 2015 , investments in Agency Securities accounted for 72.30% of our MBS portfolio. At December 31, 2014 , investments in Agency Securities accounted for 87.13% of our MBS portfolio and 86.50% of our total MBS portfolio inclusive of the Non-Agency Securities underlying our Linked Transactions (see Note 8, “Linked Transactions” for additional discussion of Linked Transactions through December 31, 2014 ). We evaluated our Agency Securities with unrealized losses at September 30, 2015 and September 30, 2014 and December 31, 2014 , to determine whether there was an other than temporary impairment. All of our Agency Securities are issued and guaranteed by GSEs. The GSEs have a long term credit rating of AA+. At those dates, we also considered whether we intended to sell Agency Securities and whether it was more likely than not that we could meet our liquidity requirements and contractual obligations without selling Agency Securities. As a result of this evaluation, no other than temporary impairment was recognized for the quarters and nine months ended September 30, 2015 and September 30, 2014 and for the year ended December 31, 2014 , respectively, because we determined that we 1) did not have the intent to sell the Agency Securities in an unrealized loss position, 2) did not believe it more likely than not that we were required to sell the securities before recovery (for example, because of liquidity requirements or contractual obligations), and/or (3) determined that a credit loss did not exist. At September 30, 2015 , we had the following securities in an unrealized gain or loss position as presented below. The components of the carrying value of our Agency Securities at September 30, 2015 are also presented below. All of our Agency Securities are fixed rate securities with a weighted average coupon of 3.27% at September 30, 2015 . September 30, 2015 Amortized Cost Gross Unrealized Loss Gross Unrealized Gain Fair Value % of Fair Value Fannie Mae Multi-Family MBS $ 154,672 $ — $ 3,248 $ 157,920 24.55 % 10 Year Fixed 2,194 — 28 2,222 0.35 15 Year Fixed 328,945 — 4,324 333,269 51.81 20 Year Fixed 26,463 (476 ) — 25,987 4.04 Total Fannie Mae $ 512,274 $ (476 ) $ 7,600 $ 519,398 80.75 % Freddie Mac 30 Year Fixed 125,209 (1,416 ) $ — 123,793 19.25 Total Freddie Mac $ 125,209 $ (1,416 ) $ — $ 123,793 19.25 % Total Agency Securities $ 637,483 $ (1,892 ) $ 7,600 $ 643,191 100.00 % At December 31, 2014 , we had the following securities in an unrealized gain or loss position as presented below. The components of the carrying value of our Agency Securities at December 31, 2014 are also presented below. All of our Agency Securities were fixed rate securities with a weighted average coupon of 3.25% at December 31, 2014 . December 31, 2014 Amortized Cost Gross Unrealized Loss Gross Unrealized Gain Fair Value % of Fair Value Fannie Mae Multi-Family MBS $ 230,799 $ — $ 2,903 $ 233,702 21.73 % 15 Year Fixed 790,238 (26 ) 6,031 796,243 74.03 20 Year Fixed 45,881 (652 ) 347 45,576 4.24 Total Fannie Mae $ 1,066,918 $ (678 ) $ 9,281 $ 1,075,521 100.00 % Total Agency Securities $ 1,066,918 $ (678 ) $ 9,281 $ 1,075,521 Actual maturities of Agency Securities are generally shorter than stated contractual maturities because actual maturities of Agency Securities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. The following table summarizes the weighted average lives of our Agency Securities at September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 Weighted Average Life of all Agency Securities Fair Value Amortized Cost Fair Value Amortized Cost Less than one year $ — $ — $ — $ — Greater than or equal to one year and less than three years — — — — Greater than or equal to three years and less than five years 339,544 335,233 702,485 697,385 Greater than or equal to five years 303,647 302,250 373,036 369,533 Total Agency Securities $ 643,191 $ 637,483 $ 1,075,521 $ 1,066,918 We use a third party model to calculate the weighted average lives of our Agency Securities. Weighted average life is calculated based on expectations for estimated prepayments for the underlying mortgage loans of our Agency Securities. These estimated prepayments are based on assumptions such as interest rates, current and future home prices, housing policy and borrower incentives. The weighted average lives of our Agency Securities at September 30, 2015 and December 31, 2014 in the table above are based upon market factors, assumptions, models and estimates from the third party model and also incorporate management’s judgment and experience. The actual weighted average lives of our Agency Securities could be longer or shorter than estimated. The following table presents the unrealized losses and estimated fair value of our Agency Securities by length of time that such securities have been in a continuous unrealized loss position at September 30, 2015 and December 31, 2014 . Unrealized Loss Position For: Less than 12 Months 12 Months or More Total As of Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses September 30, 2015 $ 123,793 $ (1,416 ) $ 25,987 $ (476 ) $ 149,780 $ (1,892 ) December 31, 2014 $ 58,363 $ (26 ) $ 27,640 $ (652 ) $ 86,003 $ (678 ) During the quarter and nine months ended September 30, 2015 , we sold $71,057 and $500,852 of Agency Securities, resulting in realized gains of $797 and $5,065 , respectively. During the quarter and nine months ended September 30, 2014 , we sold $288,572 and $1,032,219 of Agency Securities, resulting in a realized (loss) gain of $(845) and $7,931 . Sales of Agency Securities are done to reposition our securities portfolio and to reach our target level of liquidity. Non-Agency Securities, Trading All of our Non-Agency Securities are classified as trading securities and reported at their estimated fair value. Fair value changes are reported in the condensed consolidated statements of operations in the period in which they occur. As the result of the adoption of ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures, Transfers and Servicing (Topic 860), effective January 1, 2015, we completed the purchase of Non-Agency Securities with a fair value of $8,940 that were previously treated as Linked Transactions with the recognition of related repurchase agreement borrowings and accrued interest payable of $6,408 . At September 30, 2015 , investments in Non-Agency Securities accounted for 27.70% of our MBS portfolio. The components of the carrying value of our Non-Agency Securities at September 30, 2015 are presented in the table below. Non-Agency Securities September 30, 2015 Fair Value Amortized Cost Principal Amount Weighted Average Coupon Prime Fixed $ 38,583 $ 36,519 $ 42,782 5.32 % Prime Hybrid 14,497 13,042 16,806 2.33 % Prime Floater 33,811 33,766 34,750 4.37 % Alt-A Fixed 75,564 71,171 91,123 5.86 % Alt-A Hybrid 7,474 6,987 8,656 2.63 % Non-Performing 76,441 76,846 77,002 3.44 % Total Non-Agency Securities $ 246,370 $ 238,331 $ 271,119 4.51 % At December 31, 2014 , investments in Non-Agency Securities accounted for 12.87% of our MBS portfolio and 13.50% of our total MBS portfolio inclusive of the Non-Agency Securities underlying our Linked Transactions (see Note 8, "Linked Transactions" for additional discussion of Linked Transactions). The components of the carrying value of our Non-Agency Securities at December 31, 2014 are presented in the table below. Non-Agency Securities December 31, 2014 Fair Value Amortized Cost Principal Amount Weighted Average Coupon Prime Fixed $ 41,288 $ 40,894 $ 47,806 5.43 % Prime Hybrid 15,592 13,982 18,565 2.29 % Prime Floater 18,625 19,380 19,750 4.22 % Alt-A Fixed 75,072 70,986 88,965 5.99 % Alt-A Hybrid 8,354 7,972 9,998 2.50 % Total Non-Agency Securities $ 158,931 $ 153,214 $ 185,084 5.09 % Prime/Alt-A Non-Agency Securities at September 30, 2015 and December 31, 2014 include senior tranches in securitization trusts issued between 2004 and 2007, and are collateralized by residential mortgages originated between 2002 and 2007. The loans were originally considered to be either prime or one tier below prime credit quality. Prime mortgage loans are residential mortgage loans that are considered the highest tier with the most stringent underwriting standards within the Non-Agency mortgage market, but do not carry any credit guarantee from either a U.S. Government agency or GSE. These loans were originated during a period when underwriting standards were generally weak and housing prices have dropped significantly subsequent to their origination. As a result, there is still material credit risk embedded in these vintage tranches. Alt-A, or alternative A-paper, mortgage loans are considered riskier than prime mortgage loans and less risky than sub-prime mortgage loans and are typically characterized by borrowers with less than full documentation, lower credit scores, higher loan to value ratios and a higher percentage of investment properties. These securities were generally rated below investment grade at September 30, 2015 and December 31, 2014 . The non-performing Non-Agency Securities represent new securitizations to provide senior financing for a portion of the sponsor's existing non-performing loan portfolio. The following table summarizes the weighted average lives of our Non-Agency Securities at September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 Weighted Average Life of all Non-Agency Securities Fair Value Amortized Cost Fair Value Amortized Cost Less than one year $ 11,480 $ 11,529 $ — $ — Greater than or equal to one year and less than three years 67,272 67,615 — — Greater than or equal to three years and less than five years 18,725 17,688 20,045 19,866 Greater than or equal to five years 148,893 141,499 138,886 133,348 Total Non-Agency Securities $ 246,370 $ 238,331 $ 158,931 $ 153,214 We use a third party model to calculate the weighted average lives of our Non-Agency Securities. Weighted average life is calculated based on expectations for estimated prepayments for the underlying mortgage loans of our Non-Agency Securities. These estimated prepayments are based on assumptions such as interest rates, current and future home prices, housing policy and borrower incentives. The weighted average lives of our Non-Agency Securities at September 30, 2015 and December 31, 2014 in the table above are based upon market factors, assumptions, models and estimates from the third party model and also incorporate management’s judgment and experience. The actual weighted average lives of our Non-Agency Securities could be longer or shorter than estimated. The following table presents the unrealized losses and estimated fair value of our Non-Agency Securities by length of time that such securities have been in a continuous unrealized loss position at September 30, 2015 and December 31, 2014 . Unrealized Loss Position For: Less than 12 Months 12 Months or More Total As of Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses September 30, 2015 $ 89,174 $ (456 ) $ 4,406 $ (220 ) $ 93,580 $ (676 ) December 31, 2014 $ 19,166 $ (1,029 ) $ 5,893 $ (296 ) $ 25,059 $ (1,325 ) Our Non-Agency Securities are subject to risk of loss with regard to principal and interest payments and at September 30, 2015 and December 31, 2014 , have generally either been assigned below investment grade ratings by rating agencies, or have not been rated. We evaluate each investment based on the characteristics of the underlying collateral and securitization structure, rather than relying on the ratings assigned by rating agencies. In April 2014, we entered in to a long term collateral exchange agreement whereby we will receive approximately $50,000 of U.S. Treasury Securities or cash for two years (declining to $30,000 for a third year) in exchange for certain of our Non-Agency Securities. At September 30, 2015 , our repurchase agreement balance on our condensed consolidated balance sheet includes borrowing against these U.S. Treasury Securities pledged to us under this agreement.

Non-Agency Securities, Trading

Non-Agency Securities, Trading	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Non-Agency Securities, Trading	Agency Securities, Available for Sale All of our Agency Securities are classified as available for sale securities and, as such, are reported at their estimated fair value and changes in fair value reported as part of the statements of comprehensive income. At September 30, 2015 , investments in Agency Securities accounted for 72.30% of our MBS portfolio. At December 31, 2014 , investments in Agency Securities accounted for 87.13% of our MBS portfolio and 86.50% of our total MBS portfolio inclusive of the Non-Agency Securities underlying our Linked Transactions (see Note 8, “Linked Transactions” for additional discussion of Linked Transactions through December 31, 2014 ). We evaluated our Agency Securities with unrealized losses at September 30, 2015 and September 30, 2014 and December 31, 2014 , to determine whether there was an other than temporary impairment. All of our Agency Securities are issued and guaranteed by GSEs. The GSEs have a long term credit rating of AA+. At those dates, we also considered whether we intended to sell Agency Securities and whether it was more likely than not that we could meet our liquidity requirements and contractual obligations without selling Agency Securities. As a result of this evaluation, no other than temporary impairment was recognized for the quarters and nine months ended September 30, 2015 and September 30, 2014 and for the year ended December 31, 2014 , respectively, because we determined that we 1) did not have the intent to sell the Agency Securities in an unrealized loss position, 2) did not believe it more likely than not that we were required to sell the securities before recovery (for example, because of liquidity requirements or contractual obligations), and/or (3) determined that a credit loss did not exist. At September 30, 2015 , we had the following securities in an unrealized gain or loss position as presented below. The components of the carrying value of our Agency Securities at September 30, 2015 are also presented below. All of our Agency Securities are fixed rate securities with a weighted average coupon of 3.27% at September 30, 2015 . September 30, 2015 Amortized Cost Gross Unrealized Loss Gross Unrealized Gain Fair Value % of Fair Value Fannie Mae Multi-Family MBS $ 154,672 $ — $ 3,248 $ 157,920 24.55 % 10 Year Fixed 2,194 — 28 2,222 0.35 15 Year Fixed 328,945 — 4,324 333,269 51.81 20 Year Fixed 26,463 (476 ) — 25,987 4.04 Total Fannie Mae $ 512,274 $ (476 ) $ 7,600 $ 519,398 80.75 % Freddie Mac 30 Year Fixed 125,209 (1,416 ) $ — 123,793 19.25 Total Freddie Mac $ 125,209 $ (1,416 ) $ — $ 123,793 19.25 % Total Agency Securities $ 637,483 $ (1,892 ) $ 7,600 $ 643,191 100.00 % At December 31, 2014 , we had the following securities in an unrealized gain or loss position as presented below. The components of the carrying value of our Agency Securities at December 31, 2014 are also presented below. All of our Agency Securities were fixed rate securities with a weighted average coupon of 3.25% at December 31, 2014 . December 31, 2014 Amortized Cost Gross Unrealized Loss Gross Unrealized Gain Fair Value % of Fair Value Fannie Mae Multi-Family MBS $ 230,799 $ — $ 2,903 $ 233,702 21.73 % 15 Year Fixed 790,238 (26 ) 6,031 796,243 74.03 20 Year Fixed 45,881 (652 ) 347 45,576 4.24 Total Fannie Mae $ 1,066,918 $ (678 ) $ 9,281 $ 1,075,521 100.00 % Total Agency Securities $ 1,066,918 $ (678 ) $ 9,281 $ 1,075,521 Actual maturities of Agency Securities are generally shorter than stated contractual maturities because actual maturities of Agency Securities are affected by the contractual lives of the underlying mortgages, periodic payments of principal and prepayments of principal. The following table summarizes the weighted average lives of our Agency Securities at September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 Weighted Average Life of all Agency Securities Fair Value Amortized Cost Fair Value Amortized Cost Less than one year $ — $ — $ — $ — Greater than or equal to one year and less than three years — — — — Greater than or equal to three years and less than five years 339,544 335,233 702,485 697,385 Greater than or equal to five years 303,647 302,250 373,036 369,533 Total Agency Securities $ 643,191 $ 637,483 $ 1,075,521 $ 1,066,918 We use a third party model to calculate the weighted average lives of our Agency Securities. Weighted average life is calculated based on expectations for estimated prepayments for the underlying mortgage loans of our Agency Securities. These estimated prepayments are based on assumptions such as interest rates, current and future home prices, housing policy and borrower incentives. The weighted average lives of our Agency Securities at September 30, 2015 and December 31, 2014 in the table above are based upon market factors, assumptions, models and estimates from the third party model and also incorporate management’s judgment and experience. The actual weighted average lives of our Agency Securities could be longer or shorter than estimated. The following table presents the unrealized losses and estimated fair value of our Agency Securities by length of time that such securities have been in a continuous unrealized loss position at September 30, 2015 and December 31, 2014 . Unrealized Loss Position For: Less than 12 Months 12 Months or More Total As of Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses September 30, 2015 $ 123,793 $ (1,416 ) $ 25,987 $ (476 ) $ 149,780 $ (1,892 ) December 31, 2014 $ 58,363 $ (26 ) $ 27,640 $ (652 ) $ 86,003 $ (678 ) During the quarter and nine months ended September 30, 2015 , we sold $71,057 and $500,852 of Agency Securities, resulting in realized gains of $797 and $5,065 , respectively. During the quarter and nine months ended September 30, 2014 , we sold $288,572 and $1,032,219 of Agency Securities, resulting in a realized (loss) gain of $(845) and $7,931 . Sales of Agency Securities are done to reposition our securities portfolio and to reach our target level of liquidity. Non-Agency Securities, Trading All of our Non-Agency Securities are classified as trading securities and reported at their estimated fair value. Fair value changes are reported in the condensed consolidated statements of operations in the period in which they occur. As the result of the adoption of ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures, Transfers and Servicing (Topic 860), effective January 1, 2015, we completed the purchase of Non-Agency Securities with a fair value of $8,940 that were previously treated as Linked Transactions with the recognition of related repurchase agreement borrowings and accrued interest payable of $6,408 . At September 30, 2015 , investments in Non-Agency Securities accounted for 27.70% of our MBS portfolio. The components of the carrying value of our Non-Agency Securities at September 30, 2015 are presented in the table below. Non-Agency Securities September 30, 2015 Fair Value Amortized Cost Principal Amount Weighted Average Coupon Prime Fixed $ 38,583 $ 36,519 $ 42,782 5.32 % Prime Hybrid 14,497 13,042 16,806 2.33 % Prime Floater 33,811 33,766 34,750 4.37 % Alt-A Fixed 75,564 71,171 91,123 5.86 % Alt-A Hybrid 7,474 6,987 8,656 2.63 % Non-Performing 76,441 76,846 77,002 3.44 % Total Non-Agency Securities $ 246,370 $ 238,331 $ 271,119 4.51 % At December 31, 2014 , investments in Non-Agency Securities accounted for 12.87% of our MBS portfolio and 13.50% of our total MBS portfolio inclusive of the Non-Agency Securities underlying our Linked Transactions (see Note 8, "Linked Transactions" for additional discussion of Linked Transactions). The components of the carrying value of our Non-Agency Securities at December 31, 2014 are presented in the table below. Non-Agency Securities December 31, 2014 Fair Value Amortized Cost Principal Amount Weighted Average Coupon Prime Fixed $ 41,288 $ 40,894 $ 47,806 5.43 % Prime Hybrid 15,592 13,982 18,565 2.29 % Prime Floater 18,625 19,380 19,750 4.22 % Alt-A Fixed 75,072 70,986 88,965 5.99 % Alt-A Hybrid 8,354 7,972 9,998 2.50 % Total Non-Agency Securities $ 158,931 $ 153,214 $ 185,084 5.09 % Prime/Alt-A Non-Agency Securities at September 30, 2015 and December 31, 2014 include senior tranches in securitization trusts issued between 2004 and 2007, and are collateralized by residential mortgages originated between 2002 and 2007. The loans were originally considered to be either prime or one tier below prime credit quality. Prime mortgage loans are residential mortgage loans that are considered the highest tier with the most stringent underwriting standards within the Non-Agency mortgage market, but do not carry any credit guarantee from either a U.S. Government agency or GSE. These loans were originated during a period when underwriting standards were generally weak and housing prices have dropped significantly subsequent to their origination. As a result, there is still material credit risk embedded in these vintage tranches. Alt-A, or alternative A-paper, mortgage loans are considered riskier than prime mortgage loans and less risky than sub-prime mortgage loans and are typically characterized by borrowers with less than full documentation, lower credit scores, higher loan to value ratios and a higher percentage of investment properties. These securities were generally rated below investment grade at September 30, 2015 and December 31, 2014 . The non-performing Non-Agency Securities represent new securitizations to provide senior financing for a portion of the sponsor's existing non-performing loan portfolio. The following table summarizes the weighted average lives of our Non-Agency Securities at September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 Weighted Average Life of all Non-Agency Securities Fair Value Amortized Cost Fair Value Amortized Cost Less than one year $ 11,480 $ 11,529 $ — $ — Greater than or equal to one year and less than three years 67,272 67,615 — — Greater than or equal to three years and less than five years 18,725 17,688 20,045 19,866 Greater than or equal to five years 148,893 141,499 138,886 133,348 Total Non-Agency Securities $ 246,370 $ 238,331 $ 158,931 $ 153,214 We use a third party model to calculate the weighted average lives of our Non-Agency Securities. Weighted average life is calculated based on expectations for estimated prepayments for the underlying mortgage loans of our Non-Agency Securities. These estimated prepayments are based on assumptions such as interest rates, current and future home prices, housing policy and borrower incentives. The weighted average lives of our Non-Agency Securities at September 30, 2015 and December 31, 2014 in the table above are based upon market factors, assumptions, models and estimates from the third party model and also incorporate management’s judgment and experience. The actual weighted average lives of our Non-Agency Securities could be longer or shorter than estimated. The following table presents the unrealized losses and estimated fair value of our Non-Agency Securities by length of time that such securities have been in a continuous unrealized loss position at September 30, 2015 and December 31, 2014 . Unrealized Loss Position For: Less than 12 Months 12 Months or More Total As of Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses September 30, 2015 $ 89,174 $ (456 ) $ 4,406 $ (220 ) $ 93,580 $ (676 ) December 31, 2014 $ 19,166 $ (1,029 ) $ 5,893 $ (296 ) $ 25,059 $ (1,325 ) Our Non-Agency Securities are subject to risk of loss with regard to principal and interest payments and at September 30, 2015 and December 31, 2014 , have generally either been assigned below investment grade ratings by rating agencies, or have not been rated. We evaluate each investment based on the characteristics of the underlying collateral and securitization structure, rather than relying on the ratings assigned by rating agencies. In April 2014, we entered in to a long term collateral exchange agreement whereby we will receive approximately $50,000 of U.S. Treasury Securities or cash for two years (declining to $30,000 for a third year) in exchange for certain of our Non-Agency Securities. At September 30, 2015 , our repurchase agreement balance on our condensed consolidated balance sheet includes borrowing against these U.S. Treasury Securities pledged to us under this agreement.

Linked Transactions

Linked Transactions	9 Months Ended
	Sep. 30, 2015
Linked Transactions Disclosure [Abstract]
Linked Transactions	Linked Transactions Through December 31, 2014 , our Linked Transactions were evaluated on a combined basis, reported as forward (derivative) instruments and presented as assets on our balance sheets at fair value. The fair value of Linked Transactions reflected the value of the underlying Non-Agency MBS, linked repurchase agreement borrowings and accrued interest receivable and payable on such instruments. For the year ended December 31, 2014 , our Linked Transactions were not designated as hedging instruments and, as a result, the change in the fair value and net interest income from Linked Transactions were reported in other income on our consolidated statements of operations. See Note 4 , " Recent Accounting Pronouncements ." The following table presents information about our Non-Agency Securities and repurchase agreements underlying our Linked Transactions at December 31, 2014 . Our Non-Agency Securities underlying our Linked Transactions represented approximately 0.72% of our overall investment in MBS at December 31, 2014 . December 31, 2014 Linked Repurchase Agreements Linked Non-Agency Securities Maturity or Repricing Balance Weighted Average Interest Rate Non-Agency MBS Fair Value Amortized Cost Par/Current Face Weighted Average Coupon Rate Within 30 days $ 676 1.51 % Prime $ — $ — $ — 0.00 % 31 days to 60 days — 0.00 % Alt-A 8,940 8,854 12,199 6.22 % 61 days to 90 days 5,708 2.01 % Total $ 8,940 $ 8,854 $ 12,199 6.22 % Greater than 90 days — 0.00 % Total $ 6,384 1.95 % Not included in the tables above is $24 of accrued interest payable from Linked Transactions included in our condensed consolidated balance sheet for the year ended December 31, 2014 . The following table presents certain information about the components of the unrealized net gains and net interest income from Linked Transactions included in our condensed consolidated statements of operations for the quarters and nine months ended September 30, 2015 and September 30, 2014 . For the Quarters Ended For the Nine Months Ended Unrealized Net Gain and Net Interest Income from Linked Transactions September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Interest income attributable to MBS underlying Linked Transactions $ — $ 1,182 $ — 4,051 Interest expense attributable to linked repurchase agreements underlying Linked Transactions — (229 ) — (680 ) Change in fair value of Linked Transactions included in earnings — 192 — 5,233 Unrealized net gain and net interest income from Linked Transactions $ — $ 1,145 $ — $ 8,604

Repurchase Agreements

Repurchase Agreements	9 Months Ended
	Sep. 30, 2015
Disclosure of Repurchase Agreements [Abstract]
Repurchase Agreements	Repurchase Agreements At September 30, 2015 , we had MRAs with 29 counterparties and had $798,938 in outstanding borrowings with 20 of those counterparties. At December 31, 2014 , we had MRAs with 30 counterparties and had $1,134,387 in outstanding borrowings with 20 of those counterparties. See Note 8, “Linked Transactions” for additional discussion of Linked Transactions through December 31, 2014 . The following tables represent the contractual repricing and other information regarding our repurchase agreements to finance our MBS purchases at September 30, 2015 and December 31, 2014 . No amounts below are subject to offsetting. September 30, 2015 Repurchase Agreements Weighted Average Contractual Rate Weighted Average Maturity in days Haircut for Repurchase Agreements (1) Agency Securities $ 608,988 0.47 % 27 4.95 % Non-Agency Securities 144,869 1.86 % 56 22.22 % U.S. Treasury Securities 45,081 0.2 % 3 0.00 % Total or Weighted Average $ 798,938 0.71 % 31 9.38 % (1) The Haircut represents the weighted average margin requirement, or the percentage amount by which the collateral value must exceed the loan amount. December 31, 2014 Repurchase Agreements Weighted Average Contractual Rate Weighted Average Maturity in days Haircut for Repurchase Agreements (1) Agency Securities $ 1,020,916 0.37 % 39 4.87 % Non-Agency Securities 70,697 1.74 % 43 25.44 % U.S. Treasury Securities 42,774 0.19 % 2 0.00 % Total or Weighted Average $ 1,134,387 0.45 % 38 7.56 % (1) The Haircut represents the weighted average margin requirement, or the percentage amount by which the collateral value must exceed the loan amount. Our repurchase agreements require that we maintain adequate pledged collateral. A decline in the value of the MBS pledged as collateral for borrowings under repurchase agreements could result in the counterparties demanding additional collateral pledges or liquidation of some of the existing collateral to reduce borrowing levels. We manage this risk by maintaining an adequate balance of available cash and unpledged securities. An event of default or termination event under the standard MRA would give our counterparty the option to terminate all repurchase transactions existing with us and require any amount due to be payable immediately. In addition, certain of our MRAs contain a restriction that prohibits our leverage from exceeding twelve times our stockholders’ equity as well as termination events in the case of significant reductions in equity capital. We also may receive cash or securities as collateral from our derivative counterparties which we may use as additional collateral for repurchase agreements. Certain interest rate swap contracts provide for cross collateralization and cross default with repurchase agreements and other contracts with the same counterparty. Maturing or Repricing September 30, 2015 Weighted Average Contractual Rate December 31, 2014 Weighted Average Contractual Rate Within 30 days $ 546,429 0.55 % $ 522,855 0.44 % 31 days to 60 days 113,531 0.91 % 289,819 0.41 % 61 days to 90 days 138,978 1.16 % 321,713 0.49 % Greater than 90 days — 0.00 % — 0.00 % Total or Weighted Average $ 798,938 0.71 % $ 1,134,387 0.45 % At September 30, 2015 , 7 repurchase agreement counterparties individually accounted for between 5% and 10% of our aggregate borrowings. In total, these counterparties accounted for approximately 69.84% of our repurchase agreement borrowings outstanding at September 30, 2015 . At December 31, 2014 , we had 9 repurchase counterparties that individually accounted for 5% or greater or our aggregate borrowings. In total these counterparties accounted for approximately 68.89% of our repurchase agreement borrowings outstanding at December 31, 2014 . The table below represents information about repurchase agreement counterparties where the amount at risk individually accounted for 5% or greater of our stockholders' equity at September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 Repurchase Agreement Counterparty Amount at Risk Weighted Average Maturity of Repurchase Agreements in days Amount at Risk Weighted Average Maturity of Repurchase Agreements in days BNP Paribas Securities Corp. (2) $ 3,917 12 $ 7,289 14 Bank of America-Merrill Lynch (2) 5,708 31 7,238 42 Credit Suisse First Boston (1) 17,006 72 (2) 2,729 67 Royal Bank of Canada Bank 10,066 51 11,018 42 UBS AG (1) 17,677 342 19,194 615 Wells Fargo Securities 6,189 28 (2) 3,501 20 Total $ 60,563 $ 50,969 (1) Amount at risk exceeds 10% of stockholders' equity. (2) Amounts less than 5%.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives We enter into derivative transactions to manage our interest rate risk exposure. These transactions include entering into interest rate swap contracts and interest rate swaptions. These transactions are designed to lock in funding costs for repurchase agreements associated with our assets in such a way to help assure the realization of net interest margins. Such transactions are based on assumptions about prepayments on our Agency Securities which, if not realized, will cause transaction results to differ from expectations. We also utilize forward contracts for the purchase or sale of TBA Agency Securities. We have agreements with our derivative counterparties that provide for the posting of collateral based on the fair values of our interest rate swap contracts, swaptions and TBA Agency Securities. Through this margin process, either we or our swap counterparty may be required to pledge cash or Agency Securities as collateral. Collateral requirements vary by counterparty and change over time based on the fair value; notional amount and remaining term of the contracts. Certain interest rate swap contracts provide for cross collateralization and cross default with repurchase agreements and other contracts with the same counterparty. Interest rate swaptions generally provide us the option to enter into an interest rate swap agreement at a certain point of time in the future with a predetermined notional amount, stated term and stated rate of interest in the fixed leg and interest rate index on the floating leg. TBA Agency Securities are forward contracts for the purchase ("long position") or sale ("short position") of Agency Securities at a predetermined price, face amount, issuer, coupon and stated maturity on an agreed-upon future date. The specific Agency Securities delivered into the contract upon the settlement date, published each month by the Securities Industry and Financial Markets Association, are not known at the time of the transaction. We may enter into TBA Agency Securities as a means of hedging against short-term changes in interest rates. We may also enter into TBA Agency Securities as a means of acquiring or disposing of Agency Securities and we may from time to time utilize TBA dollar roll transactions to finance Agency Security purchases. We estimate the fair value of TBA Agency Securities based on similar methods used to value our Agency Securities. The following tables present information about our derivatives on the accompanying condensed consolidated balance sheets at September 30, 2015 and December 31, 2014 . September 30, 2015 Derivative Type Remaining / Underlying Term Weighted Average Remaining Swap / Option Term (Months) Weighted Average Rate Notional Amount (2) Asset Fair Value (1) Liability Fair Value (1) Interest rate swap contracts 25-36 Months 28 0.73 % $ 100,000 $ — $ (624 ) Interest rate swap contracts 49-60 Months 49 1.59 % 60,000 — (2,251 ) Interest rate swap contracts 61-72 Months 69 1.95 % 100,000 — (2,538 ) Interest rate swap contracts 85-96 Months 92 2.05 % 76,250 — (3,389 ) Interest rate swap contracts 97-108 Months 97 2.04 % 80,000 — (1,992 ) Interest rate swap contracts 121-132 Months 126 2.07 % 200,000 — (3,570 ) TBA Agency Securities — — — 65,000 627 — Total or Weighted Average $ 681,250 $ 627 $ (14,364 ) (1) See Note 5, "Fair Value of Financial Instruments" for additional discussion. (2) Notional amount includes $300,000 of forward starting interest rate swap contracts which become effective within 9 months . December 31, 2014 Derivative Type Remaining / Underlying Term Weighted Average Remaining Swap / Option Term (Months) Weighted Average Rate Notional Amount Asset Fair Value (1) Liability Fair Value (1) Interest rate swap contracts 25-36 Months 34 0.55 % $ 50,000 $ 611 $ — Interest rate swap contracts 37-48 Months 41 0.92 % 50,000 241 — Interest rate swap contracts 49-60 Months 58 1.59 % 60,000 — (306 ) Interest rate swap contracts 85-96 Months 93 1.50 % 175,000 4,178 — Interest rate swap contracts 97-108 Months 100 1.91 % 526,250 2,291 (2,297 ) Total or Weighted Average 89 1.67 % $ 861,250 $ 7,321 $ (2,603 ) (1) See Note 5, "Fair Value of Financial Instruments" for additional discussion. We have netting arrangements in place with all derivative counterparties pursuant to standard documentation developed by the International Swap and Derivatives Association. We are also required to post or hold cash collateral based upon the net underlying market value of our open positions with the counterparty. The following tables present information about our derivatives and the potential effects of the master netting arrangements if we were to offset the assets and liabilities of these financial instruments on the accompanying condensed consolidated balance sheets. Currently, we present these financial instruments at their gross amounts and they are included in derivatives at fair value on the accompanying condensed consolidated balance sheet at September 30, 2015 . September 30, 2015 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Assets Gross Amounts of Assets Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Held Net Amount Interest rate swap contracts $ — $ (14,364 ) $ 22,867 $ 8,503 TBA Agency Securities 627 — — 627 Totals $ 627 $ (14,364 ) $ 22,867 $ 9,130 September 30, 2015 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Liabilities Gross Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Posted Net Amount Interest rate swap contracts $ (14,364 ) $ 14,364 $ — $ — TBA Agency Securities — — — — Totals $ (14,364 ) $ 14,364 $ — $ — The following tables present information about our derivatives and the potential effects of the master netting arrangements if we were to offset the assets and liabilities of these financial instruments on the accompanying condensed consolidated balance sheets. Currently, we present these financial instruments at their gross amounts and they are included in derivatives at fair value on the accompanying condensed consolidated balance sheet at December 31, 2014 . December 31, 2014 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Assets Gross Amounts of Assets Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Held Net Amount Interest rate swap contracts $ 7,321 $ (2,603 ) $ 333 $ 5,051 Totals $ 7,321 $ (2,603 ) $ 333 $ 5,051 December 31, 2014 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Liabilities Gross Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Posted Net Amount Interest rate swap contracts $ (2,603 ) $ 2,603 $ — $ — Totals $ (2,603 ) $ 2,603 $ — $ — We apply trade date accounting. We did not have unsettled purchases or sales of derivatives at September 30, 2015 or December 31, 2014 . The following table represents the location and information regarding our derivatives which are included in total Other Income (Loss) in the accompanying condensed consolidated statements of operations for the quarters and nine months ended September 30, 2015 and September 30, 2014 . Income (Loss) Recognized For the Quarters Ended For the Nine Months Ended Derivatives Location on Condensed Consolidated Statements of Operations September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Interest rate swap contracts: Realized gain Realized loss on derivatives $ (57 ) $ — $ 439 $ — Interest income Realized loss on derivatives 143 265 552 768 Interest expense Realized loss on derivatives (1,257 ) (3,396 ) (5,530 ) (10,102 ) Changes in fair value Unrealized gain (loss) on derivatives (19,717 ) 1,456 (22,429 ) (27,555 ) $ (20,888 ) $ (1,675 ) $ (26,968 ) $ (36,889 ) Interest rate swaptions: Changes in fair value Unrealized gain (loss) on derivatives — (163 ) — (6,884 ) $ — $ (163 ) $ — $ (6,884 ) TBA Agency Securities: Realized gain Realized loss on derivatives 468 — 468 — Changes in fair value Unrealized gain (loss) on derivatives 792 — 626 — $ 1,260 $ — $ 1,094 $ — Totals $ (19,628 ) $ (1,838 ) $ (25,874 ) $ (43,773 )

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Management Agreement with ACM We are externally managed by ACM pursuant to a management agreement (as amended from time to time, the “Management Agreement”). See also Note 16 , " Related Party Transactions ." The Management Agreement entitles ACM to receive a management fee payable monthly in arrears in an amount equal to 1/12th of (a) 1.5% of gross equity raised (including our initial public offering and private placement equity) up to $1.0 billion plus (b) 1.0% of gross equity raised in excess of $1.0 billion . Gross equity raised was $238,877 at September 30, 2015 . The cost of repurchased stock and any dividend representing a return of capital for tax purposes will reduce the amount of gross equity raised used to calculate the monthly management fee. ACM is entitled to receive a termination fee from us under certain circumstances. The ACM monthly management fee is not calculated based on the performance of our portfolio. Accordingly, the payment of our monthly management fee may not decline in the event of a decline in our earnings and may cause us to incur losses. ACM is also the external manager of ARMOUR Residential REIT, Inc. ("ARMOUR"), a publicly traded REIT, which invests in a leveraged portfolio of Agency Securities. Our executive officers also serve as the executive officers of ARMOUR. Indemnifications and Litigation We enter into certain contracts that contain a variety of indemnifications to third parties, principally with ACM and brokers. The maximum potential amount of future payments we could be required to make under these indemnification provisions is unknown. We have not incurred any costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the estimated fair value of these agreements is not material. Accordingly, we have no liabilities recorded for these agreements at September 30, 2015 or December 31, 2014 . We are not party to any pending, threatened or contemplated litigation.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Stock Incentive Plan Our 2012 Stock Incentive Plan (the "Plan") provides for grants of common stock, restricted shares of common stock, stock options, performance shares, performance units, stock appreciation rights and other equity and cash-based awards (collectively “Awards”) to eligible individuals. The maximum number of shares of common stock reserved for the grant of awards under the Plan is equal to 3.0% of the total issued and outstanding shares of common stock (on a fully diluted basis) at the time of the grant of the award (other than any shares of common stock issued or subject to awards made pursuant to the Plan). If an award granted under the Plan expires or terminates, the shares subject to any portion of the award that expires or terminates without having been exercised or paid, as the case may be, will again become available for the issuance of additional awards. At September 30, 2015 , there were 358 shares reserved for award under the Plan. No awards have been made to date. Directors Fees In the first quarter of 2014, we began paying to our non-employee directors a fee payable in cash, common stock, or a combination of common stock and cash at the option of the director. The number of shares issued each quarter is determined by dividing the chosen U.S. dollar amount of these fees by the closing market price for our stock at the end of each quarter.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Dividends The following table presents our common stock dividend transactions for the nine months ended September 30, 2015 . Record Date Payment Date Rate per common share Aggregate amount paid to holders of record January 15, 2015 January 27, 2015 $0.12 $ 1,438.2 February 13, 2015 February 27, 2015 $0.12 1,438.2 March 13, 2015 March 27, 2015 $0.12 1,438.2 April 15, 2015 April 27, 2015 $0.09 1,079.2 May 15, 2015 May 27, 2015 $0.09 1,075.7 June 15, 2015 June 29, 2015 $0.09 1,072.0 July 15, 2015 July 27, 2015 $0.09 1,072.5 August 17, 2015 August 27, 2015 $0.09 1,072.5 September 15, 2015 September 28, 2015 $0.09 1,072.5 Total dividends paid $ 10,759 Equity Capital Raising Activities The following table presents our equity transactions for the nine months ended September 30, 2015 . Transaction Type Completion Date Number of Shares Per Share price (1) Net Proceeds Dividend Reinvestment Plan January 27, 2015 to September 28, 2015 1 $ 7.73 $ 7 (1) Weighted average price. Common Stock Repurchases The following table presents our common stock repurchases for the nine months ended September 30, 2015 . Transaction Type Completion Date Number of Shares Per Share price (1) Net Cost Repurchased shares May 7, 2015 to June 9, 2015 81 $ 7.57 $ 612 (1) Weighted average price. At September 30, 2015 , there were 1,358 authorized shares remaining under our Repurchase Program.

Net Income (Loss) per Common Sh

Net Income (Loss) per Common Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Net Income (Loss) per Common Share	Net Income (Loss) per Common Share GAAP requires earnings per share to be computed based on the weighted average number of shares outstanding during the period presented, calculated on a daily basis. Net loss per common share was $(1.39) and $(0.46) based on weighted average shares outstanding of 11,917 and 11,953 , respectively, for the quarter and nine months ended September 30, 2015 . Net income (loss) per common share was $0.55 and $(0.34) based on weighted average shares outstanding of 11,999 and 11,996 , respectively, for the quarter and nine months ended September 30, 2014 . To date, we have not issued any dilutive securities.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following table reconciles our GAAP net income (loss) to estimated REIT taxable income for the quarters and nine months ended September 30, 2015 and September 30, 2014 . For the Quarters Ended For the Nine Months Ended September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 GAAP Net Income (loss) $ (16,528 ) $ 6,572 $ (5,486 ) $ (4,067 ) Book to tax differences: Net book to tax differences on Non-Agency Securities and Linked Transactions for 2014 2,049 (1,533 ) (1,171 ) (7,232 ) (Gain) loss on sale of Agency Securities (797 ) 845 (5,065 ) (7,931 ) Amortization of deferred hedging gains (costs) (273 ) 148 (714 ) 439 Net premium amortization differences — — — (809 ) Changes in interest rate contracts 18,515 (1,293 ) 20,896 34,439 Other — (73 ) 2 (78 ) Estimated taxable income $ 2,966 $ 4,666 $ 8,462 $ 14,761 Interest rate contracts are treated as hedging transactions for tax purposes. Unrealized gains and losses on open interest rate contracts are not included in the determination of REIT taxable income. Realized gains and losses on interest rate contracts terminated before their maturity are deferred and amortized over the remainder of the original term of the contract for tax purposes. Net capital losses realized in 2013 and 2014 totaling $(80,509) and $(33,335) , respectively, may be available to offset future capital gains realized through 2018 and 2019, respectively. The aggregate tax basis of our assets and liabilities is greater than our Total Stockholders’ Equity at September 30, 2015 by approximately $7,771 , or approximately $0.65 per share (based on the 11,924 shares then outstanding). We are required and intend to timely distribute substantially all of our REIT taxable income in order to maintain our REIT status under the Code. Total dividend payments to stockholders were $10,759 for the nine months ended September 30, 2015 . Our estimated REIT taxable income available for distribution as dividends was $8,462 for the nine months ended September 30, 2015 . Our REIT taxable income and dividend requirements to maintain our REIT status are determined on an annual basis. Dividends paid in excess of REIT taxable income for the year (including amounts carried forward from prior years) will generally not be taxable to common stockholders. Our management is responsible for determining whether tax positions taken by us are more likely than not to be sustained on their merits. We have no material unrecognized tax benefits or material uncertain tax positions.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We are externally managed by ACM pursuant to the Management Agreement. All of our executive officers are also employees of ACM. ACM manages our day-to-day operations, subject to the direction and oversight of the Board. The Management Agreement runs through October 5, 2017 and is thereafter automatically renewed for successive one -year terms unless terminated under certain circumstances. Either party must provide 180 days prior written notice of any such termination. Under the terms of the Management Agreement, ACM is responsible for costs incident to the performance of its duties, such as compensation of its employees and various overhead expenses. ACM is responsible for the following primary roles: • Advising us with respect to, arranging for and managing the acquisition, financing, management and disposition of, elements of our investment portfolio; • Evaluating the duration risk and prepayment risk within the investment portfolio and arranging borrowing and hedging strategies; • Coordinating capital raising activities; • Advising us on the formulation and implementation of operating strategies and policies, arranging for the acquisition of assets, monitoring the performance of those assets and providing administrative and managerial services in connection with our day-to-day operations; and • Providing executive and administrative personnel, office space and other appropriate services required in rendering management services to us. In accordance with the Management Agreement, we incurred $899 and $2,700 in management fees for the quarter and nine months ended September 30, 2015 , respectively. For the quarter and nine months ended September 30, 2014 , we incurred $914 and $2,742 in management fees, respectively. We are required to take actions as may be reasonably required to enable ACM to carry out its duties and obligations. We are also responsible for any costs and expenses that ACM incurred solely on behalf of us other than the various overhead expenses specified in the terms of the Management Agreement. For the quarter and nine months ended September 30, 2015 , we reimbursed ACM $50 and $164 , respectively, for expenses incurred on our behalf. For the quarter and nine months ended September 30, 2014 , we reimbursed ACM $67 and $247 , respectively, for expenses incurred on our behalf. Pursuant to the sub-management agreement, Staton Bell Blank Check LLC ("SBBC") provides the following services to support ACM's performance of services to us under the Management Agreement, in each case upon reasonable request by ACM: (i) serving as a consultant to ACM with respect to the periodic review of our investment guidelines; (ii) identifying for ACM potential new lines of business and investment opportunities for us; (iii) identifying for and advising ACM with respect to selection of independent contractors that provide investment banking, securities brokerage, mortgage brokerage and other financial services, due diligence services, underwriting review services, legal and accounting services, and all other services as may be required relating to our investments; (iv) advising ACM with respect to our stockholder and public relations matters; (v) advising and assisting ACM with respect to our capital structure and capital raising; and (vi) advising ACM on negotiating agreements relating to programs established by the U.S. Government. In exchange for such services, ACM pays SBBC a monthly retainer of $115 and a sub-management fee of 25% of the net management fee earned by ACM under the Management Agreement. The sub-management agreement continues in effect until it is terminated in accordance with its terms. SBBC is also the sub-manager of ARMOUR and provides ACM the services described above in connection with ACM's management of ARMOUR. In connection with the Conversion, SBBC became substantially wholly owned by ACM, effective January 1, 2015.

Interest Rate Risk

Interest Rate Risk	9 Months Ended
	Sep. 30, 2015
Interest Rate Risk [Abstract]
Interest Rate Risk	Interest Rate Risk Our primary market risk is interest rate risk. Interest rates are highly sensitive to many factors, including governmental monetary and tax policies, domestic and international economic and political considerations and other factors beyond our control. Changes in the general level of interest rates can affect net interest income, which is the difference between the interest income earned and the interest expense incurred in connection with the liabilities, by affecting the spread between the interest-earning assets and interest-bearing liabilities. Changes in the level of interest rates also can affect the value of MBS and our ability to realize gains from the sale of these assets. A decline in the value of the MBS pledged as collateral for borrowings under repurchase agreements could result in the counterparties demanding additional collateral pledges or liquidation of some of the existing collateral to reduce borrowing levels.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On October 5, 2015, our wholly owned insurance subsidiary, LANCE Indemnity Company, LLC became a member of the Federal Home Loan Bank of Cincinnati. On October 27, 2015, a cash dividend of $0.09 per outstanding common share, or $1,073 in the aggregate, was paid to holders of record on October 15, 2015. We have also declared cash dividends of $0.09 per outstanding common share payable November 27, 2015 to holders of record on November 16, 2015 and payable December 28, 2015 to holders of record on December 15, 2015.

Summary of Significant Accoun26

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation	The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the nine months ended September 30, 2015 are not necessarily indicative of the results that may be expected for the calendar year ending December 31, 2015 . These unaudited financial statements should be read in conjunction with the audited financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2014 . The condensed consolidated financial statements include the accounts of JAVELIN Mortgage Investment Corp. and its subsidiary. All intercompany accounts and transactions have been eliminated. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant estimates affecting the accompanying condensed consolidated financial statements include the valuation of MBS (as described below) and derivative instruments.
Cash	Cash Cash includes cash on deposit with financial institutions. We may maintain deposits in federally insured financial institutions in excess of federally insured limits. However, management believes we are not exposed to significant credit risk due to the financial position and creditworthiness of the depository institutions in which those deposits are held.
Cash Collateral Posted To/By Counterparties	Cash Collateral Posted To/By Counterparties Cash collateral posted to/by counterparties represents cash posted by us to counterparties or posted by counterparties to us as collateral for our interest rate swap contracts (including swaptions) and repurchase agreements on our MBS and our Agency Securities purchased or sold on a to-be-announced basis ("TBA Agency Securities").
MBS, at Fair Value	MBS, at Fair Value We generally intend to hold most of our MBS for extended periods of time. We may, from time to time, sell any of our MBS as part of the overall management of our MBS portfolio. Management determines the appropriate classifications of the securities at the time they are acquired and evaluates the appropriateness of such classifications at each balance sheet date. Purchases and sales of our MBS are recorded on the trade date. However, in 2014, if on the purchase settlement date, a repurchase agreement was used to finance the purchase of an MBS with the same counterparty and such transaction was determined to be linked, then the MBS and linked repurchase borrowing were reported on the same settlement date as Linked Transactions (see below).
Agency Securities, Available For Sale	Agency Securities, Available For Sale At September 30, 2015 and December 31, 2014 , all of our Agency Securities were classified as available for sale securities. Agency Securities classified as available for sale are reported at their estimated fair values with unrealized gains and losses excluded from earnings and reported as part of the statements of comprehensive income (loss). We evaluate Agency Securities for other than temporary impairment at least on a quarterly basis and more frequently when economic or market concerns warrant such evaluation. We consider an impairment to be other than temporary if we (1) have the intent to sell the Agency Securities, (2) believe it is more likely than not that we will be required to sell the securities before recovery (for example, because of liquidity requirements or contractual obligations) or (3) a credit loss exists. Impairment losses recognized establish a new cost basis for the related Agency Securities.
Non-Agency Securities, Trading	Non-Agency Securities, Trading At September 30, 2015 and December 31, 2014 , all of our Non-Agency Securities were classified as trading securities. Non-Agency Securities classified as trading are reported at their estimated fair values with unrealized gains and losses included in other income (loss) as a component of the statements of operations. We estimate future cash flows for each Non-Agency Security and then discount those cash flows based on our estimates of current market yield for each individual security. We then compare our calculated price with our pricing services and/or dealer marks. Our estimates for future cash flows and current market yields incorporate such factors as coupons, prepayment speeds, defaults, delinquencies and severities.
Receivables and Payable for Unsettled Sales and Purchases	Receivables and Payables for Unsettled Sales and Purchases We account for purchases and sales of securities on the trade date, including purchases and sales for forward settlement. Receivables and payables for unsettled trades represent the agreed trade price multiplied by the outstanding balance of the securities at the balance sheet date.
Accrued Interest Receivable and Payable	Accrued Interest Receivable and Payable Accrued interest receivable includes interest accrued between payment dates on MBS. Accrued interest payable includes interest payable on our repurchase agreements.
Repurchase Agreements and Obligations to Return Securities Received as Collateral, at Fair Value	Repurchase Agreements We finance the acquisition of our MBS through the use of repurchase agreements. Our repurchase agreements are secured by our MBS and bear interest rates that have historically moved in close relationship to the Federal Funds Rate and the London Interbank Offered Rate (“LIBOR”). Under these repurchase agreements, we sell MBS to a lender and agree to repurchase the same MBS in the future for a price that is higher than the original sales price. The difference between the sales price that we receive and the repurchase price that we pay represents interest paid to the lender. A repurchase agreement operates as a financing arrangement (with the exception of repurchase agreements accounted for as a component of a Linked Transaction described below) under which we pledge our MBS as collateral to secure a loan which is equal in value to a specified percentage of the estimated fair value of the pledged collateral. We retain beneficial ownership of the pledged collateral. At the maturity of a repurchase agreement, we are required to repay the loan and concurrently receive back our pledged collateral from the lender or, with the consent of the lender, we may renew such agreement at the then prevailing interest rate. The repurchase agreements may require us to pledge additional assets to the lender in the event the estimated fair value of the existing pledged collateral declines. In addition to the repurchase agreement financing discussed above we have entered into reverse repurchase agreements with certain of our repurchase agreement counterparties. Under a typical reverse repurchase agreement, we purchase U.S. Treasury Securities from a borrower in exchange for cash and agree to sell the same securities in the future in exchange for a price that is higher than the original purchase price. The difference between the purchase price originally paid and the sale price represents interest received from the borrower. Reverse repurchase agreement receivables and repurchase agreement liabilities are presented net when they meet certain criteria, including being with the same counterparty, being governed by the same master repurchase agreement ("MRA"), settlement through the same brokerage or clearing account and maturing on the same day. Obligations to Return Securities Received as Collateral, at Fair Value At certain times, we also sell to third parties the U.S. Treasury Securities received as collateral for reverse repurchase agreements and recognize the resulting obligation to return said U.S. Treasury Securities as a liability on our condensed consolidated balance sheets. Interest is recorded on the repurchase agreements, reverse repurchase agreements and U.S. Treasury Securities sold short on an accrual basis and presented as net interest expense. Both parties to the transaction have the right to make daily margin calls based on changes in the fair value of the collateral received and/or pledged.
Derivatives, at Fair Value	Derivatives, at Fair Value We recognize all derivatives as either assets or liabilities at fair value on our condensed consolidated balance sheets. All changes in the fair values of our derivatives are reflected in our condensed consolidated statements of operations. We designate derivatives as hedges for tax purposes and any unrealized derivative gains or losses would not affect our distributable net taxable income. These transactions include interest rate swap contracts and interest rate swaptions. We also utilize forward contracts for the purchase or sale of TBA Agency Securities. We account for TBA Agency Securities as derivative instruments if it is reasonably possible that we will not take or make physical delivery of the Agency Security upon settlement of the contract. We account for TBA dollar roll transactions as a series of derivative transactions. We may also purchase and sell TBA Agency Securities as a means of investing in and financing Agency Securities (thereby increasing our "at risk" leverage) or as a means of disposing of or reducing our exposure to Agency Securities (thereby reducing our "at risk" leverage). Pursuant to TBA Agency Securities, we agree to purchase or sell, for future delivery, Agency Securities with certain principal and interest terms and certain types of collateral, but the particular Agency Securities to be delivered are not identified until shortly before the TBA settlement date. We may also choose, prior to settlement, to move the settlement of these securities out to a later date by entering into an offsetting short or long position (referred to as a "pair off"), net settling the paired off positions for cash, and simultaneously purchasing or selling a similar TBA Agency Security for a later settlement date. This transaction is commonly referred to as a "dollar roll." When it is reasonably possible that we will pair off a TBA Agency Security, we account for that contract as a derivative.
Linked Transactions	Linked Transactions Through December 31, 2014 , the initial purchase of Non-Agency Securities and the related contemporaneous repurchase financing of such MBS with the same counterparty were considered part of the same arrangement, or a “Linked Transaction,” when certain criteria were met. Our acquisition of a Non-Agency Security and a related repurchase financing provided by the seller are generally considered to be linked if the initial transfer of and repurchase financing are contractually contingent, or there is a limited secondary market for the purchased security. The components of a Linked Transaction are evaluated on a combined basis and in totality, accounted for as a forward contract and reported as “Linked Transactions” on our balance sheets. Changes in the fair value of the Non-Agency Securities and repurchase liabilities underlying the Linked Transactions and associated interest income and expense are reported as “unrealized net gains/(losses) and net interest income (loss) from Linked Transactions” on our statements of operations and are not included in other comprehensive income (loss). When the linking criteria are no longer met, the initial transfer (i.e., the purchase of a security) and repurchase financing will no longer be treated as a Linked Transaction and will be evaluated and reported separately as a MBS purchase and repurchase financing.
Preferred Stock, Common Stock, and Common Stock Repurchased	Preferred Stock At September 30, 2015 , we were authorized to issue up to 25,000 shares of preferred stock, par value $0.001 per share, with such designations, voting and other rights and preferences as may be determined from time to time by our Board of Directors ("Board") or a committee thereof. We have not issued any preferred stock to date. Common Stock At September 30, 2015 , we were authorized to issue up to 250,000 shares of common stock, par value $0.001 per share, with such designations, voting and other rights and preferences as may be determined from time to time by our Board. We had 11,924 shares of common stock issued and outstanding at September 30, 2015 and 11,985 issued and outstanding at December 31, 2014 . Common Stock Repurchased On March 5, 2014, our Board increased the authorization under the Repurchase Program to 3,000 shares of our common stock outstanding (the “Repurchase Program”). Under the Repurchase Program, shares may be purchased in the open market, including block trades, through privately negotiated transactions, or pursuant to a trading plan separately adopted in the future. The timing, manner, price and amount of any repurchases will be at our discretion, subject to the requirements of the Securities Exchange Act of 1934, as amended, and related rules. We are not required to repurchase any shares under the Repurchase Program and it may be modified, suspended or terminated at any time for any reason. We do not intend to purchase shares from our Board or other affiliates. Under Maryland law, such repurchased shares are treated as authorized but unissued. During the nine months ended September 30, 2015 , we repurchased 81 shares of our common stock under the Repurchase Program for an aggregate of $612 . At September 30, 2015 , there were 1,358 authorized shares remaining under our Repurchase Program.
Revenue Recognition	Revenue Recognition Security purchase and sale transactions, including purchase of TBA Agency Securities, are recorded on the trade date to the extent it is probable that we will take or make timely physical delivery of the related securities. Gains or losses realized from the sale of securities are included in income and are determined using the specific identification method. Interest income is earned and recognized on Agency Securities based on their unpaid principal amounts and their contractual terms. Recognition of interest income commences on the settlement date of the purchase transaction and continues through the settlement date of the sale transaction. Premiums and discounts associated with the purchase of Multi-Family MBS, which are generally not subject to prepayment, are amortized or accreted into interest income over the contractual lives of the securities using a level yield method. Premiums and discounts associated with the purchase of other Agency Securities are amortized or accreted into interest income over the actual lives of the securities, reflecting actual prepayments as they occur. Interest income on Non-Agency Securities is recognized using the effective yield method over the life of the securities based on the future cash flows expected to be received. Future cash flow projections and related effective yields are determined for each security and updated quarterly. Other than temporary impairments, which establish a new cost basis in the security for purposes of calculating effective yields, are recognized when the fair value of a security is less than its cost basis and there has been an adverse change in the future cash flows expected to be received. Other changes in future cash flows expected to be received are recognized prospectively over the remaining life of the security.
Comprehensive Income (Loss)	Comprehensive Income (Loss) Comprehensive income (loss) refers to changes in equity during a period from transactions and other events and circumstances from non-owner sources. It includes all changes in equity during a period, except those resulting from investments by owners and distributions to owners.
Recent accounting pronouncements	In June 2014, the Financial Accounting Standards Board released ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures, Transfers and Servicing (Topic 860) . This amendment to the accounting standards changed the accounting for repurchase financing transactions, that is, a transfer of a financial asset financed by a repurchase agreement with the same counterparty. In 2014, certain of these transactions were combined and accounted for as a forward contract and are reported as "Linked Transactions" on our balance sheet. Under the amendment, these arrangements are no longer presented as Linked Transactions on our condensed consolidated balance sheet but are instead accounted for from inception as purchases of Non-Agency trading securities and repurchase agreement liabilities. The amendment also changes the accounting for repurchase-to-maturity transactions to secured borrowing accounting. We do not currently have, and do not contemplate having, repurchase-to-maturity transactions. The accounting changes were effective for the Company beginning on January 1, 2015, early adoption was prohibited. In 2014, we continued to account for Linked Transactions and Non-Agency Securities all on a fair value basis. Accordingly, the adoption of this amendment had no effect on our results of operations or our accumulated deficit. The amendment also requires certain additional disclosures about repurchase agreements beginning with the second quarter 2015 condensed consolidated financial statements. See Note 9 , “ Repurchase Agreements .

Fair Value of Financial Instr27

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balance, December 31, 2014 Assets at Fair Value: Agency Securities, available for sale $ — $ 1,075,521 $ — $ 1,075,521 Non-Agency Securities, trading $ — $ — $ 158,931 $ 158,931 Linked Transactions, net $ — $ — $ 2,532 $ 2,532 Derivatives $ — $ 7,321 $ — $ 7,321 Liabilities at Fair Value: Derivatives $ — $ 2,603 $ — $ 2,603 The following tables provide a summary of our assets and liabilities that are measured at fair value on a recurring basis at September 30, 2015 and December 31, 2014 . Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Balance, September 30, 2015 Assets at Fair Value: Agency Securities, available for sale $ — $ 643,191 $ — $ 643,191 Non-Agency Securities, trading $ — $ — $ 246,370 $ 246,370 Derivatives $ — $ 627 $ — $ 627 Liabilities at Fair Value: Derivatives $ — $ 14,364 $ — $ 14,364
Carrying Values and Fair Values of Financial Assets and Liabilities	The following tables provide a summary of the carrying values and fair values of our financial assets and liabilities not carried at fair value but for which fair value is required to be disclosed at September 30, 2015 and December 31, 2014 . September 30, 2015 Fair Value Measurements using: Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial Assets: Cash $ 20,271 $ 20,271 $ 20,271 $ — $ — Cash collateral posted to counterparties $ 22,867 $ 22,867 $ — $ 22,867 $ — Accrued interest receivable $ 1,667 $ 1,667 $ — $ 1,667 $ — Financial Liabilities: — Repurchase agreements $ 798,938 $ 798,938 $ — $ 798,938 $ — Accrued interest payable $ 551 $ 551 $ — $ 551 $ — December 31, 2014 Fair Value Measurements using: Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial Assets: Cash $ 29,882 $ 29,882 $ 29,882 $ — $ — Cash collateral posted to counterparties $ 3,209 $ 3,209 $ — $ 3,209 $ — Accrued interest receivable $ 2,792 $ 2,792 $ — $ 2,792 $ — Financial Liabilities: Repurchase agreements $ 1,134,387 $ 1,134,387 $ — $ 1,134,387 $ — Cash collateral posted by counterparties $ 2,876 $ 2,876 $ — $ 2,876 $ — Accrued interest payable $ 696 $ 696 $ — $ 696 $ —
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following tables provide a summary of the changes in Level 3 assets measured at fair value on a recurring basis at September 30, 2015 and December 31, 2014 . Non-Agency Securities For the Nine Months Ended September 30, 2015 For the Year Ended December 31, 2014 Balance, beginning of period $ 158,931 $ 143,399 Purchases of Non-Agency Securities, at cost 97,027 32,397 Principal repayments of Non-Agency Securities (19,968 ) (15,494 ) Proceeds from the sale of Non-Agency Securities — (9,757 ) Gain on Non-Agency Securities 1,149 559 Linked Transactions value of purchased Non-Agency Securities 2,532 7,281 Linked Transactions liabilities recognized 6,407 — Discount accretion 292 546 Balance, end of period $ 246,370 $ 158,931 Gain on Non-Agency Securities $ 1,149 $ 559 Linked Transactions For the Nine Months Ended September 30, 2015 For the Year Ended December 31, 2014 Balance, beginning of period $ 2,532 $ 16,322 Linked Transaction value of purchased Non-Agency Securities (2,532 ) (7,281 ) Cash receipts on Linked Transactions — (16,839 ) Unrealized net gain and net interest income (loss) from Linked Transactions — 10,330 Balance, end of period $ — $ 2,532 Gain on Linked Transactions $ — $ 10,330
Range of Estimates of Cumulative Default and Loss Severities and Discount Rates	The following tables present the range of our estimates of cumulative default and loss severities, together with the discount rates implicit in our Level 3 Non-Agency Security fair values at September 30, 2015 and December 31, 2014 (inclusive of Non-Agency Securities underlying Linked Transactions), respectively. See Note 8, "Linked Transaction" for additional discussion of Non-Agency Securities that are accounted for as a component of Linked Transactions through December 31, 2014 . September 30, 2015 Unobservable Level 3 Input Minimum Weighted Average Maximum Cumulative default 0.00 % 16.12 % 68.10 % Loss severity (life) 0.00 % 37.84 % 66.70 % Discount rate 3.50 % 4.87 % 5.50 % Delinquency (life) 0.00 % 16.47 % 55.80 % Voluntary prepayments (life) 0.60 % 8.26 % 23.50 % December 31, 2014 Unobservable Level 3 Input Minimum Weighted Average Maximum Cumulative default 0.00 % 14.98 % 47.89 % Loss severity (life) 18.80 % 57.15 % 100.00 % Discount rate 4.60 % 5.44 % 6.50 % Delinquency (life) 0.00 % 13.51 % 46.30 % Voluntary prepayments (life) 5.20 % 9.02 % 15.50 %

Agency Securities, Available 28

Agency Securities, Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities	At September 30, 2015 , we had the following securities in an unrealized gain or loss position as presented below. The components of the carrying value of our Agency Securities at September 30, 2015 are also presented below. All of our Agency Securities are fixed rate securities with a weighted average coupon of 3.27% at September 30, 2015 . September 30, 2015 Amortized Cost Gross Unrealized Loss Gross Unrealized Gain Fair Value % of Fair Value Fannie Mae Multi-Family MBS $ 154,672 $ — $ 3,248 $ 157,920 24.55 % 10 Year Fixed 2,194 — 28 2,222 0.35 15 Year Fixed 328,945 — 4,324 333,269 51.81 20 Year Fixed 26,463 (476 ) — 25,987 4.04 Total Fannie Mae $ 512,274 $ (476 ) $ 7,600 $ 519,398 80.75 % Freddie Mac 30 Year Fixed 125,209 (1,416 ) $ — 123,793 19.25 Total Freddie Mac $ 125,209 $ (1,416 ) $ — $ 123,793 19.25 % Total Agency Securities $ 637,483 $ (1,892 ) $ 7,600 $ 643,191 100.00 % At December 31, 2014 , we had the following securities in an unrealized gain or loss position as presented below. The components of the carrying value of our Agency Securities at December 31, 2014 are also presented below. All of our Agency Securities were fixed rate securities with a weighted average coupon of 3.25% at December 31, 2014 . December 31, 2014 Amortized Cost Gross Unrealized Loss Gross Unrealized Gain Fair Value % of Fair Value Fannie Mae Multi-Family MBS $ 230,799 $ — $ 2,903 $ 233,702 21.73 % 15 Year Fixed 790,238 (26 ) 6,031 796,243 74.03 20 Year Fixed 45,881 (652 ) 347 45,576 4.24 Total Fannie Mae $ 1,066,918 $ (678 ) $ 9,281 $ 1,075,521 100.00 % Total Agency Securities $ 1,066,918 $ (678 ) $ 9,281 $ 1,075,521
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	The following table presents the unrealized losses and estimated fair value of our Agency Securities by length of time that such securities have been in a continuous unrealized loss position at September 30, 2015 and December 31, 2014 . Unrealized Loss Position For: Less than 12 Months 12 Months or More Total As of Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses September 30, 2015 $ 123,793 $ (1,416 ) $ 25,987 $ (476 ) $ 149,780 $ (1,892 ) December 31, 2014 $ 58,363 $ (26 ) $ 27,640 $ (652 ) $ 86,003 $ (678 )
Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Investments Classified by Contractual Maturity Date	The following table summarizes the weighted average lives of our Agency Securities at September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 Weighted Average Life of all Agency Securities Fair Value Amortized Cost Fair Value Amortized Cost Less than one year $ — $ — $ — $ — Greater than or equal to one year and less than three years — — — — Greater than or equal to three years and less than five years 339,544 335,233 702,485 697,385 Greater than or equal to five years 303,647 302,250 373,036 369,533 Total Agency Securities $ 643,191 $ 637,483 $ 1,075,521 $ 1,066,918

Non-Agency Securities, Trading

Non-Agency Securities, Trading (Tables)	9 Months Ended
	Sep. 30, 2015
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading Securities	The components of the carrying value of our Non-Agency Securities at September 30, 2015 are presented in the table below. Non-Agency Securities September 30, 2015 Fair Value Amortized Cost Principal Amount Weighted Average Coupon Prime Fixed $ 38,583 $ 36,519 $ 42,782 5.32 % Prime Hybrid 14,497 13,042 16,806 2.33 % Prime Floater 33,811 33,766 34,750 4.37 % Alt-A Fixed 75,564 71,171 91,123 5.86 % Alt-A Hybrid 7,474 6,987 8,656 2.63 % Non-Performing 76,441 76,846 77,002 3.44 % Total Non-Agency Securities $ 246,370 $ 238,331 $ 271,119 4.51 % The components of the carrying value of our Non-Agency Securities at December 31, 2014 are presented in the table below. Non-Agency Securities December 31, 2014 Fair Value Amortized Cost Principal Amount Weighted Average Coupon Prime Fixed $ 41,288 $ 40,894 $ 47,806 5.43 % Prime Hybrid 15,592 13,982 18,565 2.29 % Prime Floater 18,625 19,380 19,750 4.22 % Alt-A Fixed 75,072 70,986 88,965 5.99 % Alt-A Hybrid 8,354 7,972 9,998 2.50 % Total Non-Agency Securities $ 158,931 $ 153,214 $ 185,084 5.09 %
Schedule of Unrealized Losses and Estimated Fair Value of Non-Agency Securities	The following table presents the unrealized losses and estimated fair value of our Non-Agency Securities by length of time that such securities have been in a continuous unrealized loss position at September 30, 2015 and December 31, 2014 . Unrealized Loss Position For: Less than 12 Months 12 Months or More Total As of Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses September 30, 2015 $ 89,174 $ (456 ) $ 4,406 $ (220 ) $ 93,580 $ (676 ) December 31, 2014 $ 19,166 $ (1,029 ) $ 5,893 $ (296 ) $ 25,059 $ (1,325 )
Non-Agency Securities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Investments Classified by Contractual Maturity Date	The following table summarizes the weighted average lives of our Non-Agency Securities at September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 Weighted Average Life of all Non-Agency Securities Fair Value Amortized Cost Fair Value Amortized Cost Less than one year $ 11,480 $ 11,529 $ — $ — Greater than or equal to one year and less than three years 67,272 67,615 — — Greater than or equal to three years and less than five years 18,725 17,688 20,045 19,866 Greater than or equal to five years 148,893 141,499 138,886 133,348 Total Non-Agency Securities $ 246,370 $ 238,331 $ 158,931 $ 153,214

Linked Transactions (Tables)

Linked Transactions (Tables)	9 Months Ended
	Sep. 30, 2015
Linked Transactions Disclosure [Abstract]
Non-Agency Securities and Repurchase Agreements Underlying Linked Transactions	The following table presents information about our Non-Agency Securities and repurchase agreements underlying our Linked Transactions at December 31, 2014 . Our Non-Agency Securities underlying our Linked Transactions represented approximately 0.72% of our overall investment in MBS at December 31, 2014 . December 31, 2014 Linked Repurchase Agreements Linked Non-Agency Securities Maturity or Repricing Balance Weighted Average Interest Rate Non-Agency MBS Fair Value Amortized Cost Par/Current Face Weighted Average Coupon Rate Within 30 days $ 676 1.51 % Prime $ — $ — $ — 0.00 % 31 days to 60 days — 0.00 % Alt-A 8,940 8,854 12,199 6.22 % 61 days to 90 days 5,708 2.01 % Total $ 8,940 $ 8,854 $ 12,199 6.22 % Greater than 90 days — 0.00 % Total $ 6,384 1.95 %
Schedule of Other Nonoperating Income (Expense)	The following table presents certain information about the components of the unrealized net gains and net interest income from Linked Transactions included in our condensed consolidated statements of operations for the quarters and nine months ended September 30, 2015 and September 30, 2014 . For the Quarters Ended For the Nine Months Ended Unrealized Net Gain and Net Interest Income from Linked Transactions September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Interest income attributable to MBS underlying Linked Transactions $ — $ 1,182 $ — 4,051 Interest expense attributable to linked repurchase agreements underlying Linked Transactions — (229 ) — (680 ) Change in fair value of Linked Transactions included in earnings — 192 — 5,233 Unrealized net gain and net interest income from Linked Transactions $ — $ 1,145 $ — $ 8,604

Repurchase Agreements (Tables)

Repurchase Agreements (Tables)	9 Months Ended
	Sep. 30, 2015
Disclosure of Repurchase Agreements [Abstract]
Schedule of Repurchase Agreements	The following tables represent the contractual repricing and other information regarding our repurchase agreements to finance our MBS purchases at September 30, 2015 and December 31, 2014 . No amounts below are subject to offsetting. September 30, 2015 Repurchase Agreements Weighted Average Contractual Rate Weighted Average Maturity in days Haircut for Repurchase Agreements (1) Agency Securities $ 608,988 0.47 % 27 4.95 % Non-Agency Securities 144,869 1.86 % 56 22.22 % U.S. Treasury Securities 45,081 0.2 % 3 0.00 % Total or Weighted Average $ 798,938 0.71 % 31 9.38 % (1) The Haircut represents the weighted average margin requirement, or the percentage amount by which the collateral value must exceed the loan amount. December 31, 2014 Repurchase Agreements Weighted Average Contractual Rate Weighted Average Maturity in days Haircut for Repurchase Agreements (1) Agency Securities $ 1,020,916 0.37 % 39 4.87 % Non-Agency Securities 70,697 1.74 % 43 25.44 % U.S. Treasury Securities 42,774 0.19 % 2 0.00 % Total or Weighted Average $ 1,134,387 0.45 % 38 7.56 % (1) The Haircut represents the weighted average margin requirement, or the percentage amount by which the collateral value must exceed the loan amount. Maturing or Repricing September 30, 2015 Weighted Average Contractual Rate December 31, 2014 Weighted Average Contractual Rate Within 30 days $ 546,429 0.55 % $ 522,855 0.44 % 31 days to 60 days 113,531 0.91 % 289,819 0.41 % 61 days to 90 days 138,978 1.16 % 321,713 0.49 % Greater than 90 days — 0.00 % — 0.00 % Total or Weighted Average $ 798,938 0.71 % $ 1,134,387 0.45 %
Schedule of Repurchase Agreement Counterparties with Whom Repurchase Agreements Exceed 5 Percent of Stockholders' Equity	The table below represents information about repurchase agreement counterparties where the amount at risk individually accounted for 5% or greater of our stockholders' equity at September 30, 2015 and December 31, 2014 . September 30, 2015 December 31, 2014 Repurchase Agreement Counterparty Amount at Risk Weighted Average Maturity of Repurchase Agreements in days Amount at Risk Weighted Average Maturity of Repurchase Agreements in days BNP Paribas Securities Corp. (2) $ 3,917 12 $ 7,289 14 Bank of America-Merrill Lynch (2) 5,708 31 7,238 42 Credit Suisse First Boston (1) 17,006 72 (2) 2,729 67 Royal Bank of Canada Bank 10,066 51 11,018 42 UBS AG (1) 17,677 342 19,194 615 Wells Fargo Securities 6,189 28 (2) 3,501 20 Total $ 60,563 $ 50,969 (1) Amount at risk exceeds 10% of stockholders' equity. (2) Amounts less than 5%.

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2015
Derivative [Line Items]
Schedule of Derivative Instruments	The following tables present information about our derivatives on the accompanying condensed consolidated balance sheets at September 30, 2015 and December 31, 2014 . September 30, 2015 Derivative Type Remaining / Underlying Term Weighted Average Remaining Swap / Option Term (Months) Weighted Average Rate Notional Amount (2) Asset Fair Value (1) Liability Fair Value (1) Interest rate swap contracts 25-36 Months 28 0.73 % $ 100,000 $ — $ (624 ) Interest rate swap contracts 49-60 Months 49 1.59 % 60,000 — (2,251 ) Interest rate swap contracts 61-72 Months 69 1.95 % 100,000 — (2,538 ) Interest rate swap contracts 85-96 Months 92 2.05 % 76,250 — (3,389 ) Interest rate swap contracts 97-108 Months 97 2.04 % 80,000 — (1,992 ) Interest rate swap contracts 121-132 Months 126 2.07 % 200,000 — (3,570 ) TBA Agency Securities — — — 65,000 627 — Total or Weighted Average $ 681,250 $ 627 $ (14,364 ) (1) See Note 5, "Fair Value of Financial Instruments" for additional discussion. (2) Notional amount includes $300,000 of forward starting interest rate swap contracts which become effective within 9 months . December 31, 2014 Derivative Type Remaining / Underlying Term Weighted Average Remaining Swap / Option Term (Months) Weighted Average Rate Notional Amount Asset Fair Value (1) Liability Fair Value (1) Interest rate swap contracts 25-36 Months 34 0.55 % $ 50,000 $ 611 $ — Interest rate swap contracts 37-48 Months 41 0.92 % 50,000 241 — Interest rate swap contracts 49-60 Months 58 1.59 % 60,000 — (306 ) Interest rate swap contracts 85-96 Months 93 1.50 % 175,000 4,178 — Interest rate swap contracts 97-108 Months 100 1.91 % 526,250 2,291 (2,297 ) Total or Weighted Average 89 1.67 % $ 861,250 $ 7,321 $ (2,603 ) (1) See Note 5, "Fair Value of Financial Instruments" for additional discussion.
Derivative Instruments, Gain (Loss)	The following table represents the location and information regarding our derivatives which are included in total Other Income (Loss) in the accompanying condensed consolidated statements of operations for the quarters and nine months ended September 30, 2015 and September 30, 2014 . Income (Loss) Recognized For the Quarters Ended For the Nine Months Ended Derivatives Location on Condensed Consolidated Statements of Operations September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Interest rate swap contracts: Realized gain Realized loss on derivatives $ (57 ) $ — $ 439 $ — Interest income Realized loss on derivatives 143 265 552 768 Interest expense Realized loss on derivatives (1,257 ) (3,396 ) (5,530 ) (10,102 ) Changes in fair value Unrealized gain (loss) on derivatives (19,717 ) 1,456 (22,429 ) (27,555 ) $ (20,888 ) $ (1,675 ) $ (26,968 ) $ (36,889 ) Interest rate swaptions: Changes in fair value Unrealized gain (loss) on derivatives — (163 ) — (6,884 ) $ — $ (163 ) $ — $ (6,884 ) TBA Agency Securities: Realized gain Realized loss on derivatives 468 — 468 — Changes in fair value Unrealized gain (loss) on derivatives 792 — 626 — $ 1,260 $ — $ 1,094 $ — Totals $ (19,628 ) $ (1,838 ) $ (25,874 ) $ (43,773 )
Derivative
Derivative [Line Items]
Offsetting Assets	The following tables present information about our derivatives and the potential effects of the master netting arrangements if we were to offset the assets and liabilities of these financial instruments on the accompanying condensed consolidated balance sheets. Currently, we present these financial instruments at their gross amounts and they are included in derivatives at fair value on the accompanying condensed consolidated balance sheet at September 30, 2015 . September 30, 2015 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Assets Gross Amounts of Assets Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Held Net Amount Interest rate swap contracts $ — $ (14,364 ) $ 22,867 $ 8,503 TBA Agency Securities 627 — — 627 Totals $ 627 $ (14,364 ) $ 22,867 $ 9,130 The following tables present information about our derivatives and the potential effects of the master netting arrangements if we were to offset the assets and liabilities of these financial instruments on the accompanying condensed consolidated balance sheets. Currently, we present these financial instruments at their gross amounts and they are included in derivatives at fair value on the accompanying condensed consolidated balance sheet at December 31, 2014 . December 31, 2014 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Assets Gross Amounts of Assets Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Held Net Amount Interest rate swap contracts $ 7,321 $ (2,603 ) $ 333 $ 5,051 Totals $ 7,321 $ (2,603 ) $ 333 $ 5,051
Offsetting Liabilities	December 31, 2014 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Liabilities Gross Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Posted Net Amount Interest rate swap contracts $ (2,603 ) $ 2,603 $ — $ — Totals $ (2,603 ) $ 2,603 $ — $ — September 30, 2015 Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Liabilities Gross Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Posted Net Amount Interest rate swap contracts $ (14,364 ) $ 14,364 $ — $ — TBA Agency Securities — — — — Totals $ (14,364 ) $ 14,364 $ — $ —

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Dividends Transactions	The following table presents our common stock dividend transactions for the nine months ended September 30, 2015 . Record Date Payment Date Rate per common share Aggregate amount paid to holders of record January 15, 2015 January 27, 2015 $0.12 $ 1,438.2 February 13, 2015 February 27, 2015 $0.12 1,438.2 March 13, 2015 March 27, 2015 $0.12 1,438.2 April 15, 2015 April 27, 2015 $0.09 1,079.2 May 15, 2015 May 27, 2015 $0.09 1,075.7 June 15, 2015 June 29, 2015 $0.09 1,072.0 July 15, 2015 July 27, 2015 $0.09 1,072.5 August 17, 2015 August 27, 2015 $0.09 1,072.5 September 15, 2015 September 28, 2015 $0.09 1,072.5 Total dividends paid $ 10,759
Schedule of Stockholders Equity	The following table presents our equity transactions for the nine months ended September 30, 2015 . Transaction Type Completion Date Number of Shares Per Share price (1) Net Proceeds Dividend Reinvestment Plan January 27, 2015 to September 28, 2015 1 $ 7.73 $ 7 (1) Weighted average price. Common Stock Repurchases The following table presents our common stock repurchases for the nine months ended September 30, 2015 . Transaction Type Completion Date Number of Shares Per Share price (1) Net Cost Repurchased shares May 7, 2015 to June 9, 2015 81 $ 7.57 $ 612 (1) Weighted average price.

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	The following table reconciles our GAAP net income (loss) to estimated REIT taxable income for the quarters and nine months ended September 30, 2015 and September 30, 2014 . For the Quarters Ended For the Nine Months Ended September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 GAAP Net Income (loss) $ (16,528 ) $ 6,572 $ (5,486 ) $ (4,067 ) Book to tax differences: Net book to tax differences on Non-Agency Securities and Linked Transactions for 2014 2,049 (1,533 ) (1,171 ) (7,232 ) (Gain) loss on sale of Agency Securities (797 ) 845 (5,065 ) (7,931 ) Amortization of deferred hedging gains (costs) (273 ) 148 (714 ) 439 Net premium amortization differences — — — (809 ) Changes in interest rate contracts 18,515 (1,293 ) 20,896 34,439 Other — (73 ) 2 (78 ) Estimated taxable income $ 2,966 $ 4,666 $ 8,462 $ 14,761

Summary of Significant Accoun35

Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	9 Months Ended
	Jun. 09, 2015	Sep. 30, 2015	Dec. 31, 2014	Mar. 05, 2014
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)		25,000,000	25,000,000
Preferred stock, par value (in dollars per share)		$ 0.001	$ 0.001
Common stock, shares authorized (in shares)		250,000,000	250,000,000
Common stock, par value (in dollars per share)		$ 0.001	$ 0.001
Common stock, shares issued (in shares)		11,924,000	11,985,000
Common stock, shares outstanding (in shares)		11,924,000	11,985,000
Stock repurchase program, shares authorized (in shares)				3,000,000
Stock repurchase program, remaining authorized (in shares)		1,358,000
Common stock repurchased (in shares)	81,000
Common stock repurchased		$ 612
Common Stock
Class of Stock [Line Items]
Common stock repurchased (in shares)		81,000

Fair Value of Financial Instr36

Fair Value of Financial Instruments - Additional Information (Details)	9 Months Ended
	Sep. 30, 2015dealer
Fair Value Disclosures [Abstract]
Number of dealers received quotes from	3

Fair Value of Financial Instr37

Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets at Fair Value:
Agency Securities, available for sale	$ 643,191	$ 1,075,521
Non-Agency Securities, trading	246,370	158,931
Linked Transactions, net	0	2,532
Derivatives	627	7,321
Liabilities at Fair Value:
Derivatives	14,364	2,603
Fair Value, Measurements, Recurring
Assets at Fair Value:
Agency Securities, available for sale	643,191	1,075,521
Non-Agency Securities, trading	246,370	158,931
Linked Transactions, net		2,532
Derivatives	627	7,321
Liabilities at Fair Value:
Derivatives	14,364	2,603
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2)
Assets at Fair Value:
Agency Securities, available for sale	643,191	1,075,521
Derivatives	627	7,321
Liabilities at Fair Value:
Derivatives	14,364	2,603
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Assets at Fair Value:
Non-Agency Securities, trading	$ 246,370	158,931
Linked Transactions, net		$ 2,532

Fair Value of Financial Instr38

Fair Value of Financial Instruments - Carrying Values and Fair Values of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Carrying Value
Financial Assets:
Cash	$ 20,271	$ 29,882
Cash collateral posted to counterparties	22,867	3,209
Accrued interest receivable	1,667	2,792
Financial Liabilities:
Repurchase agreements	798,938	1,134,387
Cash collateral posted by counterparties		2,876
Accrued interest payable	551	696
Fair Value
Financial Assets:
Cash	20,271	29,882
Cash collateral posted to counterparties	22,867	3,209
Accrued interest receivable	1,667	2,792
Financial Liabilities:
Repurchase agreements	798,938	1,134,387
Cash collateral posted by counterparties		2,876
Accrued interest payable	551	696
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets:
Cash	20,271	29,882
Significant Observable Inputs (Level 2)
Financial Assets:
Cash collateral posted to counterparties	22,867	3,209
Accrued interest receivable	1,667	2,792
Financial Liabilities:
Repurchase agreements	798,938	1,134,387
Cash collateral posted by counterparties		2,876
Accrued interest payable	$ 551	$ 696

Fair Value of Financial Instr39

Fair Value of Financial Instruments - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis, Trading Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Gain (loss) on Non-Agency Securities	$ (2,127)	$ 1,571	$ 1,149	$ 2,692
Non-Agency Securities | Significant Unobservable Inputs (Level 3)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period			158,931	$ 143,399	$ 143,399
Purchases of Non-Agency Securities, at cost			97,027		32,397
Principal repayments of Non-Agency Securities			(19,968)		(15,494)
Proceeds from the sale of Non-Agency Securities			0		(9,757)
Gain on Non-Agency Securities			1,149		559
Linked Transactions value of purchased Non-Agency Securities			2,532		7,281
Linked Transactions liabilities recognized			6,407		0
Discount accretion			292		546
Balance, end of period	$ 246,370		246,370		158,931
Gain (loss) on Non-Agency Securities			$ 1,149		$ 559

Fair Value of Financial Instr40

Fair Value of Financial Instruments - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis, Linked Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Gain on Linked Transactions	$ 0	$ 1,145	$ 0	$ 8,604
Linked Transactions | Significant Unobservable Inputs (Level 3)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period			2,532	$ 16,322	$ 16,322
Linked Transactions value of purchased Non-Agency Securities			(2,532)		(7,281)
Principal repayments of Non-Agency Securities			0		(16,839)
Unrealized net gain and net interest income (loss) from Linked Transactions			0		10,330
Balance, end of period	$ 0		0		2,532
Gain on Linked Transactions			$ 0		$ 10,330

Fair Value of Financial Instr41

Fair Value of Financial Instruments - Range of Estimates of Cumulative Default and Loss Severities and Discount Rates (Details) - Significant Unobservable Inputs (Level 3)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Cumulative default	0.00%	0.00%
Loss severity (life)	0.00%	18.80%
Discount rate	3.50%	4.60%
Delinquency (life)	0.00%	0.00%
Voluntary prepayments (life)	0.60%	5.20%
Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Cumulative default	16.12%	14.98%
Loss severity (life)	37.84%	57.15%
Discount rate	4.87%	5.44%
Delinquency (life)	16.47%	13.51%
Voluntary prepayments (life)	8.26%	9.02%
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Cumulative default	68.10%	47.89%
Loss severity (life)	66.70%	100.00%
Discount rate	5.50%	6.50%
Delinquency (life)	55.80%	46.30%
Voluntary prepayments (life)	23.50%	15.50%

Agency Securities, Available 42

Agency Securities, Available for Sale - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Weighted average coupon rate	3.27%		3.27%		3.25%
Gross realized gains (losses) from sale proceeds	$ 71,057	$ 288,572	$ 500,852	$ 1,032,219
Realized gain (loss) on sale of Agency Securities (reclassified from Other comprehensive income (loss))	$ 797	$ (845)	$ 5,065	$ 7,931
Market Based Securities Including Trading Securities Underlying Linked Transactions | Portfolio Concentration Risk
Schedule of Available-for-sale Securities [Line Items]
Percentage of portfolio invested					86.50%
Agency Securities | Market Based Securities | Portfolio Concentration Risk
Schedule of Available-for-sale Securities [Line Items]
Percentage of portfolio invested			72.30%		87.13%

Agency Securities, Available 43

Agency Securities, Available for Sale - Unrealized Gain or Loss Position and Components of Carrying Value of Available for Sale Agency Securities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 637,483	$ 1,066,918
Gross Unrealized Loss	(1,892)	(678)
Gross Unrealized Gain	7,600	9,281
Fair Value	$ 643,191	1,075,521
Portfolio Concentration Risk | Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Percentage of concentration risk	100.00%
Fannie Mae
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 512,274	1,066,918
Gross Unrealized Loss	(476)	(678)
Gross Unrealized Gain	7,600	9,281
Fair Value	$ 519,398	$ 1,075,521
Fannie Mae | Portfolio Concentration Risk | Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Percentage of concentration risk	80.75%	100.00%
Fannie Mae | Multi-Family MBS
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 154,672	$ 230,799
Gross Unrealized Loss	0	0
Gross Unrealized Gain	3,248	2,903
Fair Value	$ 157,920	$ 233,702
Fannie Mae | Multi-Family MBS | Portfolio Concentration Risk | Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Percentage of concentration risk	24.55%	21.73%
Fannie Mae | 10 Year Fixed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 2,194
Gross Unrealized Loss	0
Gross Unrealized Gain	28
Fair Value	$ 2,222
Fannie Mae | 10 Year Fixed | Portfolio Concentration Risk | Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Percentage of concentration risk	0.35%
Fannie Mae | 15 Year Fixed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 328,945	$ 790,238
Gross Unrealized Loss	0	(26)
Gross Unrealized Gain	4,324	6,031
Fair Value	$ 333,269	$ 796,243
Fannie Mae | 15 Year Fixed | Portfolio Concentration Risk | Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Percentage of concentration risk	51.81%	74.03%
Fannie Mae | 20 Year Fixed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 26,463	$ 45,881
Gross Unrealized Loss	(476)	(652)
Gross Unrealized Gain	0	347
Fair Value	$ 25,987	$ 45,576
Fannie Mae | 20 Year Fixed | Portfolio Concentration Risk | Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Percentage of concentration risk	4.04%	4.24%
Freddie Mac
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 125,209
Gross Unrealized Loss	(1,416)
Gross Unrealized Gain	0
Fair Value	$ 123,793
Freddie Mac | Portfolio Concentration Risk | Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Percentage of concentration risk	19.25%
Freddie Mac | 30 Year Fixed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 125,209
Gross Unrealized Loss	(1,416)
Gross Unrealized Gain	0
Fair Value	$ 123,793
Freddie Mac | 30 Year Fixed | Portfolio Concentration Risk | Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Percentage of concentration risk	19.25%

Agency Securities, Available 44

Agency Securities, Available for Sale - Summary of Weighted Average Lives of Agency Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value
Less than one year	$ 0	$ 0
Greater than or equal to one year and less than three years	0	0
Greater than or equal to three years and less than five years	339,544	702,485
Greater than or equal to five years	303,647	373,036
Total Agency Securities	643,191	1,075,521
Amortized Cost
Less than one year	0	0
Greater than or equal to one year and less than three years	0	0
Greater than or equal to three years and less than five years	335,233	697,385
Greater than or equal to five years	302,250	369,533
Amortized Cost	$ 637,483	$ 1,066,918

Agency Securities, Available 45

Agency Securities, Available for Sale - Gross Unrealized Losses and Estimated Fair Value of Agency Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value
Less than 12 Months	$ 123,793	$ 58,363
12 Months or More	25,987	27,640
Total	149,780	86,003
Unrealized Losses
Less than 12 Months	(1,416)	(26)
Unrealized Losses	(476)	(652)
Unrealized Losses	$ (1,892)	$ (678)

Non-Agency Securities, Tradin46

Non-Agency Securities, Trading - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended	12 Months Ended
	Apr. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Concentration Risk [Line Items]
Trading securities purchased previously treated as linked transactions		$ 8,940
Repayment at maturity of linked transactions transferred to trading securities		$ 6,408
US treasury securities received in year one and two	$ 50,000
US treasury securities received in year three	$ 30,000
Non-Agency Securities | Market Based Securities | Portfolio Concentration Risk
Concentration Risk [Line Items]
Percentage of concentration risk		27.70%	12.87%
Non-Agency Securities | Market Based Securities Inclusive of Linked Transactions, Forward Contracts | Portfolio Concentration Risk
Concentration Risk [Line Items]
Percentage of concentration risk			13.50%

Non-Agency Securities, Tradin47

Non-Agency Securities, Trading - Summary of Non-Agency Securities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair Value	$ 246,370	$ 158,931
Amortized Cost	238,331	153,214
Principal Amount	$ 271,119	$ 185,084
Weighted Average Coupon	4.51%	5.09%
Prime Fixed
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair Value	$ 38,583	$ 41,288
Amortized Cost	36,519	40,894
Principal Amount	$ 42,782	$ 47,806
Weighted Average Coupon	5.32%	5.43%
Prime Hybrid
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair Value	$ 14,497	$ 15,592
Amortized Cost	13,042	13,982
Principal Amount	$ 16,806	$ 18,565
Weighted Average Coupon	2.33%	2.29%
Prime Floater
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair Value	$ 33,811	$ 18,625
Amortized Cost	33,766	19,380
Principal Amount	$ 34,750	$ 19,750
Weighted Average Coupon	4.37%	4.22%
Alt-A Fixed
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair Value	$ 75,564	$ 75,072
Amortized Cost	71,171	70,986
Principal Amount	$ 91,123	$ 88,965
Weighted Average Coupon	5.86%	5.99%
Alt-A Hybrid
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair Value	$ 7,474	$ 8,354
Amortized Cost	6,987	7,972
Principal Amount	$ 8,656	$ 9,998
Weighted Average Coupon	2.63%	2.50%
Non-Performing
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair Value	$ 76,441
Amortized Cost	76,846
Principal Amount	$ 77,002
Weighted Average Coupon	3.44%

Non-Agency Securities, Tradin48

Non-Agency Securities, Trading - Summary of Weighted Average Lives of Agency Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value
Less than one year	$ 11,480	$ 0
Greater than or equal to one year and less than three years	67,272	0
Greater than or equal to three years and less than five years	18,725	20,045
Greater than or equal to five years	148,893	138,886
Total Non-Agency Securities	246,370	158,931
Amortized Cost
Less than one year	11,529	0
Greater than or equal to one year and less than three years	67,615	0
Greater than or equal to three years and less than five years	17,688	19,866
Greater than or equal to five years	141,499	133,348
Total Non-Agency Securities	$ 238,331	$ 153,214

Non-Agency Securities, Tradin49

Non-Agency Securities, Trading - Unrealized Losses and Estimated Fair Value of Non-Agency Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value
Less than 12 Months	$ 89,174	$ 19,166
12 Months or More	4,406	5,893
Total	93,580	25,059
Unrealized Losses
Less than 12 Months	(456)	(1,029)
12 Months or More	(220)	(296)
Total	$ (676)	$ (1,325)

Linked Transactions - Addition

Linked Transactions - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2015
Concentration Risk [Line Items]
Accrued interest payable	$ 696	$ 551
Linked Transactions, Forward Contracts
Concentration Risk [Line Items]
Accrued interest payable	$ 24
Linked Transactions, Forward Contracts | Market Based Securities | Portfolio Concentration Risk
Concentration Risk [Line Items]
Percentage of concentration risk	0.72%

Linked Transactions - Non-Agen

Linked Transactions - Non-Agency Securities and Repurchase Agreements Underlying Linked Transactions (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Assets Sold under Agreements to Repurchase [Line Items]
Balance	$ 798,938	$ 1,134,387
Weighted Average Interest Rate	0.71%	0.45%
Fair Value	$ 246,370	$ 158,931
Amortized Cost	238,331	153,214
Par/Current Face	$ 271,119	$ 185,084
Weighted Average Coupon Rate	4.51%	5.09%
Within 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Weighted Average Interest Rate	0.55%	0.44%
31 days to 60 days
Assets Sold under Agreements to Repurchase [Line Items]
Weighted Average Interest Rate	0.91%	0.41%
61 days to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Weighted Average Interest Rate	1.16%	0.49%
Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Weighted Average Interest Rate	0.00%	0.00%
Not Designated as Hedging Instrument | Linked Transactions, Forward Contracts
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 6,384
Weighted Average Interest Rate		1.95%
Fair Value		$ 8,940
Amortized Cost		8,854
Par/Current Face		$ 12,199
Weighted Average Coupon Rate		6.22%
Not Designated as Hedging Instrument | Linked Transactions, Forward Contracts | Within 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 676
Weighted Average Interest Rate		1.51%
Not Designated as Hedging Instrument | Linked Transactions, Forward Contracts | 31 days to 60 days
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 0
Weighted Average Interest Rate		0.00%
Not Designated as Hedging Instrument | Linked Transactions, Forward Contracts | 61 days to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 5,708
Weighted Average Interest Rate		2.01%
Not Designated as Hedging Instrument | Linked Transactions, Forward Contracts | Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Balance		$ 0
Weighted Average Interest Rate		0.00%
Prime | Not Designated as Hedging Instrument | Linked Transactions, Forward Contracts
Assets Sold under Agreements to Repurchase [Line Items]
Fair Value		$ 0
Amortized Cost		0
Par/Current Face		$ 0
Weighted Average Coupon Rate		0.00%
Alt-A | Not Designated as Hedging Instrument | Linked Transactions, Forward Contracts
Assets Sold under Agreements to Repurchase [Line Items]
Fair Value		$ 8,940
Amortized Cost		8,854
Par/Current Face		$ 12,199
Weighted Average Coupon Rate		6.22%

Linked Transactions - Unrealiz

Linked Transactions - Unrealized Net Gain (Loss) and Net Interest Income from Linked Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Linked Transactions Disclosure [Abstract]
Interest income attributable to MBS underlying Linked Transactions	$ 0	$ 1,182	$ 0	$ 4,051
Interest expense attributable to linked repurchase agreements underlying Linked Transactions	0	(229)	0	(680)
Change in fair value of Linked Transactions included in earnings	0	192	0	5,233
Unrealized net gain and net interest income from Linked Transactions	$ 0	$ 1,145	$ 0	$ 8,604

Repurchase Agreements - Additi

Repurchase Agreements - Additional Information (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015USD ($)counterparty	Dec. 31, 2014USD ($)counterparty
Concentration Risk [Line Items]
Number of counterparties with master repurchase agreements	29	30
Repurchase agreements | $	$ 798,938	$ 1,134,387
Number of counterparties with outstanding borrowings	20	20
Ratio of indebtedness to net capital	12
Counterparty Concentration Risk | Borrowings
Concentration Risk [Line Items]
Number of counterparties	7	9
Percentage of concentration risk	69.84%	68.89%
Minimum | Counterparty Concentration Risk | Borrowings
Concentration Risk [Line Items]
Percentage of concentration risk	5.00%
Maximum | Counterparty Concentration Risk | Borrowings
Concentration Risk [Line Items]
Percentage of concentration risk	10.00%
Carrying Value
Concentration Risk [Line Items]
Repurchase agreements | $	$ 798,938

Repurchase Agreements - Summar

Repurchase Agreements - Summary of Repurchase Agreements (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 798,938	$ 1,134,387
Weighted Average Contractual Rate	0.71%	0.45%
Weighted Average Maturity in days	31 days	38 days
Haircut on Repurchase Agreements	9.38%	7.56%
Agency Securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 608,988	$ 1,020,916
Weighted Average Contractual Rate	0.47%	0.37%
Weighted Average Maturity in days	27 days	39 days
Haircut on Repurchase Agreements	4.95%	4.87%
Non-Agency Securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 144,869	$ 70,697
Weighted Average Contractual Rate	1.86%	1.74%
Weighted Average Maturity in days	56 days	43 days
Haircut on Repurchase Agreements	22.22%	25.44%
U.S. Treasury Securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 45,081	$ 42,774
Weighted Average Contractual Rate	0.20%	0.19%
Weighted Average Maturity in days	3 days	2 days
Haircut on Repurchase Agreements	0.00%	0.00%

Repurchase Agreements - Contra

Repurchase Agreements - Contractual Repricing, Master Repurchase Agreement and Other Information Regarding Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 798,938	$ 1,134,387
Weighted Average Contractual Rate	0.71%	0.45%
Within 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 546,429	$ 522,855
Weighted Average Contractual Rate	0.55%	0.44%
31 days to 60 days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 113,531	$ 289,819
Weighted Average Contractual Rate	0.91%	0.41%
61 days to 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 138,978	$ 321,713
Weighted Average Contractual Rate	1.16%	0.49%
Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase Agreements	$ 0	$ 0
Weighted Average Contractual Rate	0.00%	0.00%

Repurchase Agreements - Agreem

Repurchase Agreements - Agreements Exceed 5 Percent of Stockholders Equity (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Repurchase Agreement Counterparty [Line Items]
Amount at Risk	$ 60,563	$ 50,969
Weighted Average Maturity in days	31 days	38 days
BNP Paribas Securities Corp.
Repurchase Agreement Counterparty [Line Items]
Amount at Risk	$ 3,917	$ 7,289
Weighted Average Maturity in days	12 days	14 days
Bank of America-Merrill Lynch
Repurchase Agreement Counterparty [Line Items]
Amount at Risk	$ 5,708	$ 7,238
Weighted Average Maturity in days	31 days	42 days
Credit Suisse First Boston
Repurchase Agreement Counterparty [Line Items]
Amount at Risk	$ 17,006	$ 2,729
Weighted Average Maturity in days	72 days	67 days
Royal Bank of Canada Bank
Repurchase Agreement Counterparty [Line Items]
Amount at Risk	$ 10,066	$ 11,018
Weighted Average Maturity in days	51 days	42 days
UBS AG
Repurchase Agreement Counterparty [Line Items]
Amount at Risk	$ 17,677	$ 19,194
Weighted Average Maturity in days	342 days	615 days
Wells Fargo Securities
Repurchase Agreement Counterparty [Line Items]
Amount at Risk	$ 6,189	$ 3,501
Weighted Average Maturity in days	28 days	20 days

Derivatives - Interest Rate Sw

Derivatives - Interest Rate Swap Contracts, Swaptions and Futures Contracts (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Weighted Average Remaining Swap / Option Term (Months)		89 months
Weighted Average Rate		1.67%
Notional Amount	$ 681,250,000	$ 861,250,000
Asset Fair Value	627,000	7,321,000
Liability Fair Value	$ (14,364,000)	$ (2,603,000)
Interest Rate Swap 25-36 Months
Derivative [Line Items]
Remaining / Underlying Term-Minimum	25 months	25 months
Remaining / Underlying Term-Maximum	36 months	36 months
Weighted Average Remaining Swap / Option Term (Months)	28 months	34 months
Weighted Average Rate	0.73%	0.55%
Notional Amount	$ 100,000,000	$ 50,000,000
Asset Fair Value	0	611,000
Liability Fair Value	$ (624,000)	$ 0
Interest Rate Swap 37-48 Months
Derivative [Line Items]
Remaining / Underlying Term-Minimum		37 months
Remaining / Underlying Term-Maximum		48 months
Weighted Average Remaining Swap / Option Term (Months)		41 months
Weighted Average Rate		0.92%
Notional Amount		$ 50,000,000
Asset Fair Value		241,000
Liability Fair Value		$ 0
Interest Rate Swap 49-60 Months
Derivative [Line Items]
Remaining / Underlying Term-Minimum	49 months	49 months
Remaining / Underlying Term-Maximum	60 months	60 months
Weighted Average Remaining Swap / Option Term (Months)	49 months	58 months
Weighted Average Rate	1.59%	1.59%
Notional Amount	$ 60,000,000	$ 60,000,000
Asset Fair Value	0	0
Liability Fair Value	$ (2,251,000)	$ (306,000)
Interest Rate Swap 61-72 Months
Derivative [Line Items]
Remaining / Underlying Term-Minimum	61 months
Remaining / Underlying Term-Maximum	72 months
Weighted Average Remaining Swap / Option Term (Months)	69 months
Weighted Average Rate	1.95%
Notional Amount	$ 100,000,000
Asset Fair Value	0
Liability Fair Value	$ (2,538,000)
Interest Rate Swap 85-96 Months
Derivative [Line Items]
Remaining / Underlying Term-Minimum	85 months	85 months
Remaining / Underlying Term-Maximum	96 months	96 months
Weighted Average Remaining Swap / Option Term (Months)	92 months	93 months
Weighted Average Rate	2.05%	1.50%
Notional Amount	$ 76,250,000	$ 175,000,000
Asset Fair Value	0	4,178,000
Liability Fair Value	$ (3,389,000)	$ 0
Interest Rate Swap 97-108 Months
Derivative [Line Items]
Remaining / Underlying Term-Minimum	97 months	97 months
Remaining / Underlying Term-Maximum	108 months	108 months
Weighted Average Remaining Swap / Option Term (Months)	97 months	100 months
Weighted Average Rate	2.04%	1.91%
Notional Amount	$ 80,000,000	$ 526,250,000
Asset Fair Value	0	2,291,000
Liability Fair Value	$ (1,992,000)	$ (2,297,000)
Interest Rate Swap 121-132 Months
Derivative [Line Items]
Remaining / Underlying Term-Minimum	121 months
Remaining / Underlying Term-Maximum	132 months
Weighted Average Remaining Swap / Option Term (Months)	126 months
Weighted Average Rate	2.07%
Notional Amount	$ 200,000,000
Asset Fair Value	0
Liability Fair Value	(3,570,000)
TBA Agency Securities
Derivative [Line Items]
Notional Amount	65,000,000
Asset Fair Value	627,000
Liability Fair Value	0
Interest rate swap contracts
Derivative [Line Items]
Notional amount of derivatives becoming effective in the next nine months	$ 300,000,000

Derivatives - Offsetting Asset

Derivatives - Offsetting Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Offsetting Assets [Line Items]
Gross Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	$ 627	$ 7,321
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments	(14,364)	(2,603)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Cash Collateral Held	22,867	333
Net Amount	9,130	5,051
Interest rate swap contracts
Offsetting Assets [Line Items]
Gross Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	0	7,321
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments	(14,364)	(2,603)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Cash Collateral Held	22,867	333
Net Amount	8,503	$ 5,051
TBA Agency Securities
Offsetting Assets [Line Items]
Gross Amounts of Assets Presented in the Condensed Consolidated Balance Sheets	627
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments	0
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Cash Collateral Held	0
Net Amount	$ 627

Derivatives - Offsetting Liabi

Derivatives - Offsetting Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Offsetting Liabilities [Line Items]
Gross Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet	$ (14,364)	$ (2,603)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments	14,364	2,603
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Posted	0	0
Net Amount	0	0
Interest rate swap contracts
Offsetting Liabilities [Line Items]
Gross Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet	(14,364)	(2,603)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments	14,364	2,603
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Posted	0	0
Net Amount	0	$ 0
TBA Agency Securities
Offsetting Liabilities [Line Items]
Gross Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet	0
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments	0
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Posted	0
Net Amount	$ 0

Derivatives - Location and Inf

Derivatives - Location and Information of Derivatives (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Realized loss on derivatives	[1]	$ (703)	$ (3,131)	$ (4,071)	$ (9,334)
Unrealized gain (loss) on derivatives		(18,925)	1,293	(21,803)	(34,439)
Total		(19,628)	(1,838)	(25,874)	(43,773)
Interest rate swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total		(20,888)	(1,675)	(26,968)	(36,889)
Interest rate swap contracts | Realized loss on derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Realized loss on derivatives		(57)	0	439	0
Interest income		143	265	552	768
Interest expense		(1,257)	(3,396)	(5,530)	(10,102)
Interest rate swap contracts | Unrealized gain (loss) on derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on derivatives		(19,717)	1,456	(22,429)	(27,555)
Interest rate swaptions
Derivative Instruments, Gain (Loss) [Line Items]
Total		0	(163)	0	(6,884)
Interest rate swaptions | Unrealized gain (loss) on derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on derivatives		0	(163)	0	(6,884)
TBA Agency Securities
Derivative Instruments, Gain (Loss) [Line Items]
Total		1,260	0	1,094	0
TBA Agency Securities | Realized loss on derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Realized loss on derivatives		468	0	468	0
TBA Agency Securities | Unrealized gain (loss) on derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on derivatives		$ 792	$ 0	$ 626	$ 0
[1]	Interest expense related to our interest rate swap contracts is recorded in realized loss on derivatives on the statements of operations. For additional information see Note 10 to the condensed consolidated financial statements.

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Thousands	Sep. 30, 2015USD ($)
Other Commitments [Line Items]
Monthly percentage of effective management fee percentage	8.33%
ACM
Other Commitments [Line Items]
Percentage of gross equity raised used in calculation of management fee up to 1 Billion	1.50%
Percentage of gross equity raised used in calculation of management fee in excess of 1 Billion	1.00%
Gross equity raised	$ 238,877

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - 2012 Stock Incentive Plan shares in Thousands	9 Months Ended
	Sep. 30, 2015shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in Shares)	358
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common shares reserved for grant of awards as percentage of total common shares issued and outstanding	3.00%

Stockholders' Equity - Dividen

Stockholders' Equity - Dividend Transactions (Details) - USD ($)	Sep. 28, 2015	Sep. 15, 2015	Aug. 27, 2015	Aug. 17, 2015	Jul. 27, 2015	Jul. 15, 2015	Jun. 29, 2015	Jun. 15, 2015	May. 27, 2015	May. 15, 2015	Apr. 27, 2015	Apr. 15, 2015	Mar. 27, 2015	Mar. 13, 2015	Feb. 27, 2015	Feb. 13, 2015	Jan. 27, 2015	Jan. 15, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity [Abstract]
Dividends declared per common share (in usd per share)		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.12		$ 0.12		$ 0.12	$ 0.27	$ 0.45	$ 0.90	$ 1.35
Rate Per Common Share	$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.12		$ 0.12		$ 0.12
Aggregate amount paid to holders of record (in Dollars)	$ 1,072,500		$ 1,072,500		$ 1,072,500		$ 1,072,000		$ 1,075,700		$ 1,079,200		$ 1,438,200		$ 1,438,200		$ 1,438,200				$ 10,759,000	$ 16,195,000

Stockholders' Equity - Equity

Stockholders' Equity - Equity Transactions (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	8 Months Ended	9 Months Ended
	Jun. 09, 2015	Sep. 28, 2015	Sep. 30, 2015
Sale of Stock [Line Items]
Number of shares reinvested		1
Net Proceeds		$ 7	$ 7
Number of shares repurchased	81
Per share price repurchased	$ 7.57
Net Cost			$ 612
Stock repurchase program, remaining authorized (in shares)			1,358
Weighted Average
Sale of Stock [Line Items]
Per share price reinvested		$ 7.73

Net Income (Loss) per Common 65

Net Income (Loss) per Common Share (Details) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income (loss) per common share (in usd per share)	$ (1.39)	$ 0.55	$ (0.46)	$ (0.34)
Weighted average common shares outstanding (in shares)	11,917	11,999	11,953	11,996

Income Taxes - Reconciliation

Income Taxes - Reconciliation of GAAP Net Income to Estimated REIT Taxable Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
GAAP Net Income (loss)	$ (16,528)	$ 6,572	$ (5,486)	$ (4,067)
Book to tax differences:
Net book to tax differences on Non-Agency Securities and Linked Transactions for 2014	2,049	(1,533)	(1,171)	(7,232)
(Gain) loss on sale of Agency Securities	(797)	845	(5,065)	(7,931)
Amortization of deferred hedging gains (costs)	(273)	148	(714)	439
Net premium amortization differences	0	0	0	(809)
Changes in interest rate contracts	18,515	(1,293)	20,896	34,439
Other	0	(73)	2	(78)
Estimated taxable income	$ 2,966	$ 4,666	$ 8,462	$ 14,761

Income Taxes - Additional Info

Income Taxes - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands	Sep. 28, 2015	Aug. 27, 2015	Jul. 27, 2015	Jun. 29, 2015	May. 27, 2015	Apr. 27, 2015	Mar. 27, 2015	Feb. 27, 2015	Jan. 27, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Aggregate tax basis of stockholders' equity in excess of assets and liabilities										$ 7,771,000		$ 7,771,000
Aggregate tax basis of stockholders' equity in excess of assets and liabilities (dollars per share)										$ 0.65		$ 0.65
Common stock, shares outstanding (in shares)										11,924		11,924		11,985
Common stock dividends paid	$ 1,072,500	$ 1,072,500	$ 1,072,500	$ 1,072,000	$ 1,075,700	$ 1,079,200	$ 1,438,200	$ 1,438,200	$ 1,438,200			$ 10,759,000	$ 16,195,000
Estimated REIT taxable income										$ 2,966,000	$ 4,666,000	$ 8,462,000	$ 14,761,000
Capital Loss Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward														$ (33,335,000)	$ (80,509,000)

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Related Party Transaction [Line Items]
Management fee	$ 899,000	$ 914,000	$ 2,700,000	$ 2,742,000
ACM
Related Party Transaction [Line Items]
Automatic renewal period of management agreement			1 year
Period of written notice of termination			180 days
ACM | Management Fee
Related Party Transaction [Line Items]
Management fee	899,000	914,000	$ 2,700,000	2,742,000
ACM | Reimbursement
Related Party Transaction [Line Items]
Management fee	$ 50,000	$ 67,000	164,000	$ 247,000
Sub-Manager | Armour Capital Management LP | Sub-Management Agreement
Related Party Transaction [Line Items]
Monthly retainer fee			$ 115,000
Fee payable percent of monthly management fee earned			25.00%

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	Oct. 27, 2015	Sep. 28, 2015	Sep. 15, 2015	Aug. 27, 2015	Aug. 17, 2015	Jul. 27, 2015	Jul. 15, 2015	Jun. 29, 2015	Jun. 15, 2015	May. 27, 2015	May. 15, 2015	Apr. 27, 2015	Apr. 15, 2015	Mar. 27, 2015	Mar. 13, 2015	Feb. 27, 2015	Feb. 13, 2015	Jan. 27, 2015	Jan. 15, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Subsequent Event [Line Items]
Rate per common share (in Dollars per share)		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.12		$ 0.12		$ 0.12
Aggregate amount paid to holders of record (in Dollars)		$ 1,072,500		$ 1,072,500		$ 1,072,500		$ 1,072,000		$ 1,075,700		$ 1,079,200		$ 1,438,200		$ 1,438,200		$ 1,438,200				$ 10,759,000	$ 16,195,000
Dividends declared per common share (in usd per share)			$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.09		$ 0.12		$ 0.12		$ 0.12	$ 0.27	$ 0.45	$ 0.90	$ 1.35
Subsequent Event
Subsequent Event [Line Items]
Rate per common share (in Dollars per share)	$ 0.09
Aggregate amount paid to holders of record (in Dollars)	$ 1,073,000
Dividends declared per common share (in usd per share)	$ 0.09