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Borrowings under Repurchase Agreements | 3 Months Ended
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Mar. 31, 2018
Disclosure of Repurchase Agreements [Abstract] |
Repurchase Agreements Disclosure [Text Block] | Borrowings under Repurchase Agreements The Company enters into repurchase agreements. A repurchase agreement involves the sale of an asset to a counterparty together with a simultaneous agreement to repurchase the transferred asset or similar asset from such counterparty at a future date. The Company accounts for its repurchase agreements as collateralized borrowings, with the transferred assets effectively serving as collateral for the related borrowing. The Company's repurchase agreements typically range in term from 30 to 180 days. The principal economic terms of each repurchase agreement—such as loan amount, interest rate, and maturity date—are typically negotiated on a transaction-by-transaction basis. Other terms and conditions, such as relating to events of default, are typically governed under the Company's master repurchase agreements. Absent an event of default, the Company maintains beneficial ownership of the transferred securities during the term of the repurchase agreement and receives the related principal and interest payments. Interest rates on these borrowings are generally fixed based on prevailing rates corresponding to the terms of the borrowings, and interest is paid at the termination of the repurchase agreement at which time the Company may enter into a new repurchase agreement at prevailing market rates with the same counterparty, repay that counterparty and possibly negotiate financing terms with a different counterparty, or choose to no longer finance the related asset. In response to a decline in the fair value of the transferred securities, whether as a result of changes in market conditions, security paydowns, or other factors, repurchase agreement counterparties will typically make a margin call, whereby the Company will be required to post additional securities and/or cash as collateral with the counterparty in order to re-establish the agreed-upon collateralization requirements. In the event of increases in fair value of the transferred securities, the Company generally can require the counterparty to post collateral with it in the form of cash or securities. The Company is generally permitted to sell or re-pledge any securities posted by the counterparty as collateral; however, upon termination of the repurchase agreement, or other circumstance in which the counterparty is no longer required to post such margin, the Company must return to the counterparty the same security that had been posted. The contractual amount (loan amount) of the Company's repurchase agreements approximates fair value, based on the short-term nature of the debt and the adequacy of the collateral. At any given time, the Company seeks to have its outstanding borrowings under repurchase agreements with several different counterparties in order to reduce the exposure to any single counterparty. As of both March 31, 2018 and December 31, 2017, the Company had outstanding borrowings under repurchase agreements with 15 counterparties. The following table details the Company's outstanding borrowings under repurchase agreements as of March 31, 2018 and December 31, 2017:
|  | March 31, 2018 |  | December 31, 2017
|  |  |  | Weighted Average |  |  |  | Weighted Average
Remaining Days to Maturity |  | Borrowings Outstanding |  | Interest Rate |  | Remaining Days to Maturity |  | Borrowings Outstanding |  | Interest Rate |  | Remaining Days to Maturity
|  | (In thousands) |  |  |  |  |  |  |  |  |  |
30 days or less |  | $ | 468,222 |  |  | 1.67 | % |  | 16 |  |  | $ | 410,628 |  |  | 1.41 | % |  | 15
31-60 days |  | 818,835 |  |  | 1.76 |  |  | 45 |  |  | 906,602 |  |  | 1.46 |  |  | 46
61-90 days |  | 302,262 |  |  | 1.90 |  |  | 75 |  |  | 273,665 |  |  | 1.60 |  |  | 74
91-120 days |  | — |  |  | — |  |  | — |  |  | 6,311 |  |  | 1.61 |  |  | 120
Total |  | $ | 1,589,319 |  |  | 1.76 | % |  | 42 |  |  | $ | 1,597,206 |  |  | 1.47 | % |  | 43
Repurchase agreements involving underlying investments that the Company sold prior to period end, for settlement following period end, are shown using their original maturity dates even though such repurchase agreements may be expected to be terminated early upon settlement of the sale of the underlying investment. As of both March 31, 2018 and December 31, 2017, the fair value of RMBS transferred as collateral under outstanding borrowings under repurchase agreements was $1.7 billion. Collateral transferred under outstanding borrowings as of March 31, 2018 includes RMBS in the amount of $73.7 million that were sold prior to period end but for which such sale had not yet settled. Collateral transferred under outstanding borrowings as of December 31, 2017 includes RMBS in the amount of $21.5 million that were sold prior to year end but for which such sale had not yet settled. In addition the Company posted net cash collateral of $21.9 million and additional securities with a fair value of $2.1 million as of March 31, 2018 as a result of margin calls from various counterparties. The Company posted net cash collateral of $18.7 million and additional securities with a fair value of $2.5 million as of December 31, 2017 as a result of margin calls from various counterparties. Amount at risk represents the excess, if any, for each counterparty of the fair value of collateral held by such counterparty over the amounts outstanding under repurchase agreements. There was no counterparty for which the amount at risk was greater than 10% of shareholders' equity as of March 31, 2018 or December 31, 2017.

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- References No definition available. + Details
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- Definition The entire disclosure for repurchase agreements (also known as repos), resale agreements (also known as reverse repurchase agreements or reverse repos), securities borrowed transactions, and securities loaned transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -URI http://asc.fasb.org/topic&trid=2197590 + Details
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