|
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance (Details) (USD $)
In Thousands, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2013
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Dec. 31, 2012
|
Dec. 31, 2011
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
$ 95,345
|
$ (40,906)
|
$ 26,755
|
| Gain (Loss) on Interest Rate Swap and Swaption Agreements |
245,229
|
(159,775)
|
(86,769)
|
| Gain (Loss) on Mortgage Loans |
(33,846)
|
2,270
|
0
|
| Trading Activity, Gains and Losses, Net |
320,559
|
(198,311)
|
(60,014)
|
|
Forward Contracts [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
151,021
|
(30,897)
|
91
|
|
Options Held [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
7,798
|
0
|
0
|
|
Swap [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
(11,438)
|
0
|
0
|
|
Forward Purchase Commitment [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Gain (Loss) on Mortgage Loans |
(20,015)
|
2,396
|
0
|
|
Inverse Interest-Only Securities [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
(13,415)
|
41,706
|
23,392
|
|
Credit Default Swap, Buying Protection [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
0
|
11,988
|
(8,137)
|
|
Short US Treasury Securities [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
(991)
|
(1,768)
|
0
|
|
Forward Sale Commitment [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Gain (Loss) on Mortgage Loans |
0
|
(26)
|
0
|
|
Interest Rate Swaps Associated with Repurchase Agreements [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Gain (Loss) on Interest Rate Swap and Swaption Agreements |
130,268
|
(111,707)
|
(92,881)
|
|
Interest Rate Swaption [Member]
|
|
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Gain (Loss) on Interest Rate Swap and Swaption Agreements |
123,033
|
(35,012)
|
0
|
|
Credit Default Swap, Selling Protection [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
(75,927)
|
(61,935)
|
11,409
|
|
Agency To-be-Announced Securities, Non-Risk Management [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
38,297
|
0
|
0
|
|
Short [Member] | Interest Rate Swap Associated with Available-for-Sale Securities, Mortgage Loans Held-for-Sale and Forward Purchase Commitments [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Gain (Loss) on Interest Rate Swap and Swaption Agreements |
(15,378)
|
0
|
0
|
|
Short [Member] | Interest Rate Swaps Assicated with U.S. Treasuries, TBAs and MSRs [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Gain (Loss) on Interest Rate Swap and Swaption Agreements |
906
|
0
|
0
|
|
Long [Member] | Interest Rate Swap Associated with Available-for-Sale Securities, Mortgage Loans Held-for-Sale and Forward Purchase Commitments [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Gain (Loss) on Interest Rate Swap and Swaption Agreements |
16,641
|
0
|
0
|
|
Long [Member] | Interest Rate Swaps Assicated with U.S. Treasuries, TBAs and MSRs [Member]
|
|
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
|
| Gain (Loss) on Interest Rate Swap and Swaption Agreements |
$ (10,241)
|
$ (13,056)
|
$ 6,112
|