| Available-for-sale Securities [Table Text Block] |
The following table presents the components of the Company’s MBS designated as AFS as of September 30, 2013 and December 31, 2012: | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2013 | | Par | | Net Premium (Discount) | | Amortized Cost | | Net Unrealized Gain (Loss) | | Fair Value | | Weighted average coupon | Agency: | | | | | | | | | | | | RMBS | $ | 2,723,084 |
| | $ | 162,370 |
| | $ | 2,885,454 |
| | $ | (56,407 | ) | | $ | 2,829,047 |
| | 3.26 | % | CMBS | 261,440 |
| | 19,844 |
| | 281,284 |
| | 11,941 |
| | 293,225 |
| | 4.82 | % | CMBS IO (1) | — |
| | 466,494 |
| | 466,494 |
| | 9,114 |
| | 475,608 |
| | 0.89 | % | Total Agency AFS: | 2,984,524 |
| | 648,708 |
| | 3,633,232 |
| | (35,352 | ) | | 3,597,880 |
| | | | | | | | | | | | | | | Non-Agency: | | | | | | | | | | | | RMBS | 14,972 |
| | (351 | ) | | 14,621 |
| | (33 | ) | | 14,588 |
| | 4.58 | % | CMBS | 381,342 |
| | (17,213 | ) | | 364,129 |
| | 10,620 |
| | 374,749 |
| | 5.52 | % | CMBS IO (1) | — |
| | 123,172 |
| | 123,172 |
| | 2,377 |
| | 125,549 |
| | 0.87 | % | Total non-Agency AFS: | 396,314 |
| | 105,608 |
| | 501,922 |
| | 12,964 |
| | 514,886 |
| | | | | | | | | | | | | | | Total AFS securities | $ | 3,380,838 |
| | $ | 754,316 |
| | $ | 4,135,154 |
| | $ | (22,388 | ) | | $ | 4,112,766 |
| | |
| | (1) | The notional balance for Agency CMBS IO and non-Agency CMBS IO is $9,682,065 and $2,857,343, respectively, as of September 30, 2013. |
| | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2012 | | Par | | Net Premium (Discount) | | Amortized Cost | | Net Unrealized Gain (Loss) | | Fair Value | | Weighted average coupon | Agency: | | | | | | | | | | | | RMBS | $ | 2,425,826 |
| | $ | 137,168 |
| | $ | 2,562,994 |
| | $ | 8,343 |
| | $ | 2,571,337 |
| | 3.67 | % | CMBS | 280,602 |
| | 21,907 |
| | 302,509 |
| | 21,564 |
| | 324,073 |
| | 5.19 | % | CMBS IO (1) | — |
| | 550,171 |
| | 550,171 |
| | 17,009 |
| | 567,180 |
| | 0.95 | % | Total Agency AFS: | 2,706,428 |
| | 709,246 |
| | 3,415,674 |
| | 46,916 |
| | 3,462,590 |
| | | | | | | | | | | | | | | Non-Agency: | | | | | | | | | | | | RMBS | 11,411 |
| | (781 | ) | | 10,630 |
| | 408 |
| | 11,038 |
| | 4.28 | % | CMBS | 463,747 |
| | (17,313 | ) | | 446,434 |
| | 39,908 |
| | 486,342 |
| | 5.31 | % | CMBS IO (1) | — |
| | 108,928 |
| | 108,928 |
| | 5,014 |
| | 113,942 |
| | 0.86 | % | Total non-Agency AFS: | 475,158 |
| | 90,834 |
| | 565,992 |
| | 45,330 |
| | 611,322 |
| | | | | | | | | | | | | | | Total AFS securities | $ | 3,181,586 |
| | $ | 800,080 |
| | $ | 3,981,666 |
| | $ | 92,246 |
| | $ | 4,073,912 |
| | |
| | (1) | The notional balance for the Agency CMBS IO and non-Agency CMBS IO is $10,059,495 and $2,393,614, respectively, as of December 31, 2012. |
|
| Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] |
The following table presents certain information for those Agency MBS in an unrealized loss position as of September 30, 2013 and December 31, 2012: | | | | | | | | | | | | | | | | | | | | | | September 30, 2013 | | December 31, 2012 | | Fair Value | | Gross Unrealized Losses | | # of Securities | | Fair Value | | Gross Unrealized Losses | | # of Securities | Continuous unrealized loss position for less than 12 months: | | | | | | | | | | | | Agency MBS | $ | 2,129,694 |
| | $ | (48,337 | ) | | 164 | | $ | 1,026,277 |
| | $ | (6,552 | ) | | 83 | Non-Agency MBS | 126,846 |
| | (5,902 | ) | | 23 | | 13,877 |
| | (76 | ) | | 3 | | | | | | | | | | | | | Continuous unrealized loss position for 12 months or longer: | | | | | | | | | | | | Agency MBS | $ | 558,070 |
| | $ | (17,718 | ) | | 67 | | $ | 271,719 |
| | $ | (5,797 | ) | | 34 | Non-Agency MBS | 1,820 |
| | (100 | ) | | 6 | | 2,701 |
| | (198 | ) | | 8 |
|