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Secured Borrowings (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | 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 | $ 2,863,480 |  | $ 3,109,420 |
Secured borrowing, weighted average interest rate | 0.85% |  | 0.69% |
Fair Value of Collateral Pledged | $ 3,116,380 |  | $ 3,367,412 |
Weighted average maturity remaining | 21 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 | $ 6,182 |  | $ 7,035 |
Secured borrowing, weighted average interest rate | 1.80% |  | 1.65% |
Fair Value of Collateral Pledged | $ 6,685 |  | $ 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 | $ 1,284,519 |  | $ 1,439,436 |
Secured borrowing, weighted average interest rate | 0.67% |  | 0.47% |
Fair Value of Collateral Pledged | $ 1,334,785 |  | $ 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 | $ 45,581 |  | $ 52,128 |
Secured borrowing, weighted average interest rate | 1.81% |  | 1.77% |
Fair Value of Collateral Pledged | $ 54,577 |  | $ 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 | $ 547,234 |  | $ 301,427 |
Secured borrowing, weighted average interest rate | 0.67% |  | 0.49% |
Fair Value of Collateral Pledged | $ 592,932 |  | $ 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 | $ 101,795 |  | $ 126,378 |
Secured borrowing, weighted average interest rate | 1.37% |  | 1.26% |
Fair Value of Collateral Pledged | $ 117,564 |  | $ 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 | $ 331,263 |  | $ 360,245 |
Secured borrowing, weighted average interest rate | 1.30% |  | 1.24% |
Fair Value of Collateral Pledged | $ 388,185 |  | $ 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 | $ 283,906 |  | $ 302,771 |
Secured borrowing, weighted average interest rate | 1.39% |  | 1.33% |
Fair Value of Collateral Pledged | $ 338,357 |  | $ 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 | $ 2,600,480 |  | $ 2,589,420 |
Secured borrowing, weighted average interest rate | 0.88% |  | 0.75% |
Fair Value of Collateral Pledged | $ 2,833,085 |  | $ 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 | $ 283,295 |  | $ 541,771 | [1]
[1] | As of June 30, 2016 and December 31, 2015, FHLB advances were collateralized primarily with Agency CMBS.

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