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Secured Borrowings (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 2,741,278 | $ 3,109,420 |
Secured borrowing, weighted average interest rate | 0.88% | 0.69% |
Fair Value of Collateral Pledged | $ 2,975,014 | $ 3,367,412 |
Weighted average maturity remaining | 18 days | 22 days |
Securitization financing bond |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 5,424 | $ 7,035 |
Secured borrowing, weighted average interest rate | 1.86% | 1.65% |
Fair Value of Collateral Pledged | $ 5,882 | $ 8,054 |
RMBS | Agency MBS |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 1,156,635 | $ 1,439,436 |
Secured borrowing, weighted average interest rate | 0.70% | 0.47% |
Fair Value of Collateral Pledged | $ 1,204,542 | $ 1,483,152 |
RMBS | Non-Agency MBS |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 38,613 | $ 52,128 |
Secured borrowing, weighted average interest rate | 1.88% | 1.77% |
Fair Value of Collateral Pledged | $ 41,082 | $ 64,286 |
CMBS | Agency MBS |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 594,661 | $ 301,427 |
Secured borrowing, weighted average interest rate | 0.69% | 0.49% |
Fair Value of Collateral Pledged | $ 643,207 | $ 345,728 |
CMBS | Non-Agency MBS |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 69,687 | $ 126,378 |
Secured borrowing, weighted average interest rate | 1.50% | 1.26% |
Fair Value of Collateral Pledged | $ 82,573 | $ 143,785 |
CMBS IO | Agency MBS |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 322,632 | $ 360,245 |
Secured borrowing, weighted average interest rate | 1.38% | 1.24% |
Fair Value of Collateral Pledged | $ 378,875 | $ 421,285 |
CMBS IO | Non-Agency MBS |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 290,626 | $ 302,771 |
Secured borrowing, weighted average interest rate | 1.45% | 1.33% |
Fair Value of Collateral Pledged | $ 343,900 | $ 359,351 |
Repurchase agreements |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 2,478,278 | $ 2,589,420 |
Secured borrowing, weighted average interest rate | 0.91% | 0.75% |
Fair Value of Collateral Pledged | $ 2,700,061 | $ 2,825,641 |
Federal Home Loan Bank Advances [Member] |  |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 263,000 | $ 520,000 |
Secured borrowing, weighted average interest rate | 0.51% | 0.40% |
Fair Value of Collateral Pledged | $ 274,953 | $ 541,771 | [1]
[1] | As of September 30, 2016 and December 31, 2015, FHLB advances were collateralized primarily with Agency CMBS.

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- Definition Interest rate on the amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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