|
Available-for-Sale Securities, at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale securities, at fair value | $ 12,697,908 | $ 12,256,727 |
|
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale securities, at fair value | 2,086,057 | 2,977,291 |
|
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale securities, at fair value | 5,477,888 | 4,435,820 |
|
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale securities, at fair value | 2,134,467 | 2,084,298 |
|
Mortgage-backed Securities, Issued by Private Enterprises [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale securities, at fair value | $ 2,999,496 | $ 2,759,318 |
| X | ||||||||||
|
- Definition
Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|