Consolidated Condensed Schedule Of Investments (Long Investments) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2014		Dec. 31, 2013
Schedule of Investments [Line Items]
Fair Value	$ 2,440,828,000		$ 1,730,130,000
Investment Owned, at Cost	2,391,276,000		1,688,257,000
Percentage collaterallized by GNRCMO certificates	100.00%		100.00%
Non-performing loans, maturity date not applicable	10,600,000
Unrated But Agency-Guaranteed [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	144.78%		164.58%
Long Investment A Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	0.64%		0.34%
Long Investment BBB Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	4.59%		2.97%
Long Investment BB Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	66.71%		97.95%
Long Investment Unrated Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	83.84%		10.52%
Principal And Interest - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	124.03%	[1],[2],[3],[4],[5]	137.75%	[1],[2],[6],[7],[8]
Fair Value	1,007,244,000	[2],[3],[4],[5]	862,368,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 25,954 Federal National Mortgage Association Pool 3.50% 2042-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	25,954,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2042-10	[2],[3],[4],[5]
Fair Value	26,602,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,116 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	17,116,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-11	[2],[3],[4],[5]
Fair Value	18,152,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,562 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	15,562,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-11	[2],[3],[4],[5]
Fair Value	16,490,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,850 Government National Mortgage Association Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	14,850,000	[2],[3],[4],[5]
Investment Owned Description	Government National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-09	[2],[3],[4],[5]
Fair Value	15,784,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,095 Federal National Mortgage Association Pool 5.00% 2041-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	14,095,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2041-08	[2],[3],[4],[5]
Fair Value	15,583,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,100 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	12,100,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2044-01	[2],[3],[4],[5]
Fair Value	13,227,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,351 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	12,351,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-08	[2],[3],[4],[5]
Fair Value	13,106,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,623 Federal National Mortgage Association Pool 5.00% 2041-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	11,623,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2041-03	[2],[3],[4],[5]
Fair Value	12,984,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,143 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	11,143,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-09	[2],[3],[4],[5]
Fair Value	11,750,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 10,646 Federal National Mortgage Association Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	10,646,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-09	[2],[3],[4],[5]
Fair Value	11,287,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,734 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	9,734,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-06	[2],[3],[4],[5]
Fair Value	10,335,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,338 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	9,338,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2043-10	[2],[3],[4],[5]
Fair Value	10,088,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,040 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	9,040,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-07	[2],[3],[4],[5]
Fair Value	9,550,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,721 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	8,721,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-08	[2],[3],[4],[5]
Fair Value	9,219,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,380 Federal National Mortgage Association Pool 4.50% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	8,380,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2044-02	[2],[3],[4],[5]
Fair Value	9,069,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,711 Federal National Mortgage Association Pool 5.00% 2044-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,711,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2044-03	[2],[3],[4],[5]
Fair Value	7,503,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,076 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	7,076,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-10	[2],[3],[4],[5]
Fair Value	7,490,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,034 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	7,034,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2042-11	[2],[3],[4],[5]
Fair Value	7,234,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,692 Federal National Mortgage Association Pool 3.50% 2028-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,692,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2028-03	[2],[3],[4],[5]
Fair Value	7,077,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,464 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,464,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2044-02	[2],[3],[4],[5]
Fair Value	7,068,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,302 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,302,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2043-10	[2],[3],[4],[5]
Fair Value	6,824,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,218 Federal National Mortgage Association Pool 4.50% 2046-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,218,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2026-04	[2],[3],[4],[5]
Fair Value	6,579,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,072 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,072,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-09	[2],[3],[4],[5]
Fair Value	6,403,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,605 Federal National Mortgage Association Pool 4.50% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,605,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2044-02	[2],[3],[4],[5]
Fair Value	6,142,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,789 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,789,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-08	[2],[3],[4],[5]
Fair Value	6,142,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,387 Federal National Mortgage Association Pool 5.00% 2044-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,387,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2044-03	[2],[3],[4],[5]
Fair Value	6,022,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,633 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,633,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-08	[2],[3],[4],[5]
Fair Value	5,978,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,333 Federal National Mortgage Association Pool 5.50% 2039-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,333,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.50%	[2],[3],[4],[5]
Maturity	2039-10	[2],[3],[4],[5]
Fair Value	5,939,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,588 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,588,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-08	[2],[3],[4],[5]
Fair Value	5,906,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,289 Government National Mortgage Association Pool 4.54% 2062-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,289,000	[2],[3],[4],[5]
Investment Owned Description	Government National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.54%	[2],[3],[4],[5]
Maturity	2062-11	[2],[3],[4],[5]
Fair Value	5,760,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,434 Federal National Mortgage Association Pool 4.00% 2044-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,434,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-05	[2],[3],[4],[5]
Fair Value	5,753,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,427 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,427,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-08	[2],[3],[4],[5]
Fair Value	5,731,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,757 Federal Home Loan Mortgage Corporation Pool 3.00% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,757,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	3.00%	[2],[3],[4],[5]
Maturity	2043-01	[2],[3],[4],[5]
Fair Value	5,721,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,384 Federal Home Loan Mortgage Corporation Pool 3.50% 2029-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,384,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2029-05	[2],[3],[4],[5]
Fair Value	5,680,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,011 Federal National Mortgage Association Pool 4.50% 2043-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,011,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2043-12	[2],[3],[4],[5]
Fair Value	5,480,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,179 Federal National Mortgage Association Pool, 3.50% 2028-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,179,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2028-12	[2],[3],[4],[5]
Fair Value	5,471,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,155 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,155,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-09	[2],[3],[4],[5]
Fair Value	5,466,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,150 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,150,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-06	[2],[3],[4],[5]
Fair Value	5,448,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,501 Federal National Mortgage Association Pool 3.00% 2043-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,501,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	3.00%	[2],[3],[4],[5]
Maturity	2043-04	[2],[3],[4],[5]
Fair Value	5,435,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,108 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,108,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-07	[2],[3],[4],[5]
Fair Value	5,424,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,066 Federal National Mortgage Association Pool 4.00% 2044-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,066,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-05	[2],[3],[4],[5]
Fair Value	5,374,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,958 Federal National Mortgage Association Pool 4.00% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,958,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-01	[2],[3],[4],[5]
Fair Value	5,264,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,684 Federal National Mortgage Association Pool 4.50% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,684,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2044-01	[2],[3],[4],[5]
Fair Value	5,126,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,841 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,841,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-09	[2],[3],[4],[5]
Fair Value	5,124,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,522 Federal Home Loan Mortgage Corporation Pool 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,522,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2043-10	[2],[3],[4],[5]
Fair Value	4,946,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,623 Federal National Mortgage Association Pool 4.00% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,623,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-01	[2],[3],[4],[5]
Fair Value	4,886,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,527 Federal National Mortgage Association Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,527,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-09	[2],[3],[4],[5]
Fair Value	4,800,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,508 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,508,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-02	[2],[3],[4],[5]
Fair Value	4,787,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,514 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,514,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-08	[2],[3],[4],[5]
Fair Value	4,770,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,497 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,497,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-09	[2],[3],[4],[5]
Fair Value	4,768,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,312 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,312,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2043-10	[2],[3],[4],[5]
Fair Value	4,691,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,253 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,253,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2043-10	[2],[3],[4],[5]
Fair Value	4,686,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,262 Federal National Mortgage Association Pool 4.50% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,262,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2044-02	[2],[3],[4],[5]
Fair Value	4,638,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,387 Federal National Mortgage Association Pool 3.50% 2029-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,387,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2029-05	[2],[3],[4],[5]
Fair Value	4,633,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,285 Government National Mortgage Association Pool 4.75% 2061-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,285,000	[2],[3],[4],[5]
Investment Owned Description	Government National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.75%	[2],[3],[4],[5]
Maturity	2061-01	[2],[3],[4],[5]
Fair Value	4,589,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,188 Federal National Mortgage Association Pool 4.50% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,188,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2043-11	[2],[3],[4],[5]
Fair Value	4,510,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,094 Federal National Mortgage Association Pool 4.50% 2044-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,094,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2044-03	[2],[3],[4],[5]
Fair Value	4,462,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,015 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,015,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2043-10	[2],[3],[4],[5]
Fair Value	4,458,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,138 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,138,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-06	[2],[3],[4],[5]
Fair Value	4,380,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,094 Federal National Mortgage Association Pool 4.00% 2042-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,094,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2042-04	[2],[3],[4],[5]
Fair Value	4,327,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,079 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,079,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2043-11	[2],[3],[4],[5]
Fair Value	4,325,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,988 Federal National Mortgage Association Pool 4.50% 2044-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,988,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2044-04	[2],[3],[4],[5]
Fair Value	4,319,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,958 Federal Home Loan Mortgage Corporation Pool 4.50% 2043-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,958,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2043-12	[2],[3],[4],[5]
Fair Value	4,290,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,823 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,823,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2043-10	[2],[3],[4],[5]
Fair Value	4,266,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,035 Federal Home Loan Mortgage Corporation Pool 3.50% 2029-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,035,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2029-02	[2],[3],[4],[5]
Fair Value	4,257,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,769 Federal National Mortgage Association Pool 5.00% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,769,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2044-01	[2],[3],[4],[5]
Fair Value	4,237,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,813 Federal National Mortgage Association Pool 5.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,813,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2043-11	[2],[3],[4],[5]
Fair Value	4,232,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,162 Federal Home Loan Mortgage Corporation Pool 3.50% 2043-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,162,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2043-06	[2],[3],[4],[5]
Fair Value	4,232,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,909 Federal National Mortgage Association Pool 4.00% 2044-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,909,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2044-10	[2],[3],[4],[5]
Fair Value	4,137,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,742 Federal National Mortgage Association Pool 5.00% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,742,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2044-01	[2],[3],[4],[5]
Fair Value	4,128,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,718 Federal National Mortgage Association Pool 5.00% 2040-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,718,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2040-11	[2],[3],[4],[5]
Fair Value	4,117,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,815 Federal National Mortgage Association Pool 4.50% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,815,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.50%	[2],[3],[4],[5]
Maturity	2043-08	[2],[3],[4],[5]
Fair Value	4,112,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,838 Federal National Mortgage Corporation Pool 4.00% 2033-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,838,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	4.00%	[2],[3],[4],[5]
Maturity	2033-11	[2],[3],[4],[5]
Fair Value	4,105,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,674 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,674,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[2],[3],[4],[5]
Rate	5.00%	[2],[3],[4],[5]
Maturity	2043-10	[2],[3],[4],[5]
Fair Value	4,094,000	[2],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	298,087,000	[2],[3],[4],[5]	111,228,000	[2],[6],[7],[8]
Investment Owned Description	Other Federal National Mortgage Association Pools	[2],[3],[4],[5]	Other Federal National Mortgage Association Pools	[2],[6],[7],[8]
Fair Value	318,998,000	[2],[3],[4],[5]	115,792,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	3.00%	[2],[3],[4],[5]	3.00%	[2],[6],[7],[8]
Maturity	2026-06	[2],[3],[4],[5]	2028-06	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	6.00%	[2],[3],[4],[5]	6.00%	[2],[6],[7],[8]
Maturity	2044-10	[2],[3],[4],[5]	2044-01	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	145,950,000	[2],[3],[4],[5]	80,675,000	[2],[6],[7],[8]
Investment Owned Description	Other Federal Home Loan Mortgage Corporation Pools	[2],[3],[4],[5]	Other Federal Home Loan Mortgage Corporation Pools	[2],[6],[7],[8]
Fair Value	155,009,000	[2],[3],[4],[5]	81,716,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	3.00%	[2],[3],[4],[5]	2.50%	[2],[6],[7],[8]
Maturity	2028-03	[2],[3],[4],[5]	2028-09	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	6.00%	[2],[3],[4],[5]	6.00%	[2],[6],[7],[8]
Maturity	2044-10	[2],[3],[4],[5]	2043-12	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	20,467,000	[2],[3],[4],[5]	8,191,000	[2],[6],[7],[8]
Investment Owned Description	Other Government National Mortgage Association Pools	[2],[3],[4],[5]	Other Government National Mortgage Association Pools	[2],[6],[7],[8]
Fair Value	22,265,000	[2],[3],[4],[5]	8,949,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	4.49%	[2],[3],[4],[5]	4.49%	[2],[6],[7],[8]
Maturity	2060-02	[2],[3],[4],[5]	2061-11	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	5.54%	[2],[3],[4],[5]	4.68%	[2],[6],[7],[8]
Maturity	2064-06	[2],[3],[4],[5]	2062-11	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 38,439 Federal National Mortgage Association Pool, 3.50% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			38,439,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2043-01	[2],[6],[7],[8]
Fair Value			37,742,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 27,523 Federal National Mortgage Association Pool, 3.50% 2042-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			27,523,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2042-10	[2],[6],[7],[8]
Fair Value			27,407,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,735 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			17,735,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-11	[2],[6],[7],[8]
Fair Value			18,327,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 18,267 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			18,267,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2043-04	[2],[6],[7],[8]
Fair Value			17,322,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,538 Federal National Mortgage Association Pool, 5.00% 2041-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			15,538,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2041-08	[2],[6],[7],[8]
Fair Value			16,910,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 16,572 Federal National Mortgage Association Pool, 3.00% 2028-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			16,572,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2028-06	[2],[6],[7],[8]
Fair Value			16,729,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,759 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			15,759,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-11	[2],[6],[7],[8]
Fair Value			16,279,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,017 Federal National Mortgage Association Pool, 4.50% 2041-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			15,017,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2041-10	[2],[6],[7],[8]
Fair Value			15,958,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,835 Federal National Mortgage Association Pool, 4.50% 2041-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			14,835,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2041-09	[2],[6],[7],[8]
Fair Value			15,743,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 13,367 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			13,367,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			13,783,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,686 Federal Home Loan Mortgage Corporation Pool, 5.00% 2041-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			12,686,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2041-07	[2],[6],[7],[8]
Fair Value			13,692,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,316 Federal National Mortgage Association Pool, 5.00% 2041-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			12,316,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2041-03	[2],[6],[7],[8]
Fair Value			13,444,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,295 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			11,295,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			12,005,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,478 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			11,478,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			11,861,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,835 Federal National Mortgage Association Pool, 3.00% 2042-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			11,835,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2042-08	[2],[6],[7],[8]
Fair Value			11,263,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,697 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			9,697,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-07	[2],[6],[7],[8]
Fair Value			9,979,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,114 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			9,114,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			9,409,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,841 Federal Home Loan Mortgage Corporation Pool, 4.50% 2041-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			8,841,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2041-10	[2],[6],[7],[8]
Fair Value			9,378,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,025 Federal National Mortgage Association Pool, 4.00% 2043-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			9,025,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-12	[2],[6],[7],[8]
Fair Value			9,326,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,747 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			9,747,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2043-02	[2],[6],[7],[8]
Fair Value			9,251,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,789 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			8,789,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-11	[2],[6],[7],[8]
Fair Value			9,013,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,413 Federal National Mortgage Association Pool, 4.50% 2026-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			7,413,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2026-04	[2],[6],[7],[8]
Fair Value			7,898,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,893 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,893,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			7,326,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,327 Federal National Mortgage Association Pool, 3.50% 2042-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			7,327,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2042-11	[2],[6],[7],[8]
Fair Value			7,299,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,854 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,854,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			7,005,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,288 Federal National Mortgage Association Pool, 5.50% 2039-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,288,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.50%	[2],[6],[7],[8]
Maturity			2039-10	[2],[6],[7],[8]
Fair Value			6,946,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,463 Federal National Mortgage Association Pool, 4.50% 2043-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,463,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-09	[2],[6],[7],[8]
Fair Value			6,865,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,033 Federal National Mortgage Association Pool, 4.50% 2043-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,033,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-12	[2],[6],[7],[8]
Fair Value			6,418,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,022 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,022,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			6,228,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,025 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,025,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			6,218,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,632 Government National Mortgage Association Pool, 4.46% 2063-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,632,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.46%	[2],[6],[7],[8]
Maturity			2063-02	[2],[6],[7],[8]
Fair Value			6,136,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,893 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,893,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			6,083,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,342 Federal National Mortgage Association Pool, 3.00% 2042-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,342,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2042-04	[2],[6],[7],[8]
Fair Value			6,035,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,287 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,287,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2043-01	[2],[6],[7],[8]
Fair Value			5,967,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,410 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,410,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			5,925,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,702 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,702,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			5,867,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,361 Government National Mortgage Association Pool, 4.54% 2062-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,361,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.54%	[2],[6],[7],[8]
Maturity			2062-11	[2],[6],[7],[8]
Fair Value			5,859,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,241 Government National Mortgage Association Pool, 4.58% 2062-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,241,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.58%	[2],[6],[7],[8]
Maturity			2062-10	[2],[6],[7],[8]
Fair Value			5,733,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,234 Government National Mortgage Association Pool, 4.63% 2061-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,234,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.63%	[2],[6],[7],[8]
Maturity			2061-06	[2],[6],[7],[8]
Fair Value			5,688,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,978 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,978,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2043-04	[2],[6],[7],[8]
Fair Value			5,676,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,189 Government National Mortgage Association Pool, 4.60% 2062-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,189,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.60%	[2],[6],[7],[8]
Maturity			2062-06	[2],[6],[7],[8]
Fair Value			5,672,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,338 Federal National Mortgage Association Pool, 4.50% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,338,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-11	[2],[6],[7],[8]
Fair Value			5,668,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,274 Federal National Mortgage Association Pool, 4.00% 2026-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,274,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2026-07	[2],[6],[7],[8]
Fair Value			5,593,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,147 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,147,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			5,460,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,130 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,130,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			5,442,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,904 Federal National Mortgage Association Pool, 4.00% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,904,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-01	[2],[6],[7],[8]
Fair Value			5,063,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,484 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,484,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			4,897,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,720 Federal National Mortgage Association Pool, 4.00% 2042-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,720,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2042-04	[2],[6],[7],[8]
Fair Value			4,873,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,032 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			5,032,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2043-06	[2],[6],[7],[8]
Fair Value			4,776,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,472 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,472,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			4,768,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,604 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,604,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-11	[2],[6],[7],[8]
Fair Value			4,758,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,477 Federal National Mortgage Association Pool, 4.50% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,477,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			4,754,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,581 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,581,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			4,715,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,359 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,359,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-09	[2],[6],[7],[8]
Fair Value			4,625,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,604 Federal National Mortgage Association Pool, 3.50% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,604,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			4,586,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,673 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,673,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2043-02	[2],[6],[7],[8]
Fair Value			4,435,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,060 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,060,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			4,423,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,025 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,025,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			4,387,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,231 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,231,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-11	[2],[6],[7],[8]
Fair Value			4,372,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,932 Government National Mortgage Association Pool, 4.69% 2061-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,932,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.69%	[2],[6],[7],[8]
Maturity			2061-07	[2],[6],[7],[8]
Fair Value			4,288,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,886 Government National Mortgage Association Pool, 4.75% 2061-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,886,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.75%	[2],[6],[7],[8]
Maturity			2061-01	[2],[6],[7],[8]
Fair Value			4,213,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,864 Federal National Mortgage Association Pool, 5.00% 2040-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,864,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2040-11	[2],[6],[7],[8]
Fair Value			4,203,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,811 Federal National Mortgage Association Pool, 5.00% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,811,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2044-01	[2],[6],[7],[8]
Fair Value			4,169,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,826 Government National Mortgage Association Pool, 4.80% 2061-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,826,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.80%	[2],[6],[7],[8]
Maturity			2061-02	[2],[6],[7],[8]
Fair Value			4,157,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,225 Federal Home Loan Mortgage Corporation Pool, 3.50% 2043-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,225,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2043-06	[2],[6],[7],[8]
Fair Value			4,137,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,929 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,929,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			4,043,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,801 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,801,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-11	[2],[6],[7],[8]
Fair Value			3,885,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,599 Federal National Mortgage Association Pool, 4.50% 2043-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,599,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-12	[2],[6],[7],[8]
Fair Value			3,837,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,737 Federal Home Loan Mortgage Corporation Pool, 3.00% 2028-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,737,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2028-03	[2],[6],[7],[8]
Fair Value			3,810,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,434 Government National Mortgage Association Pool, 4.66% 2063-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,434,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.66%	[2],[6],[7],[8]
Maturity			2063-01	[2],[6],[7],[8]
Fair Value			3,772,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,448 Federal National Mortgage Association Pool, 5.00% 2040-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,448,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2040-12	[2],[6],[7],[8]
Fair Value			3,759,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,601 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,601,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			3,715,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,594 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,594,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			3,710,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,566 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,566,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			3,683,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,400 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,400,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			3,613,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,495 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,495,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			3,608,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,273 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,273,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			3,479,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,515 Federal Home Loan Mortgage Corporation Pool, 3.50% 2043-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,515,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2043-06	[2],[6],[7],[8]
Fair Value			3,454,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,111 Federal National Mortgage Association Pool, 5.00% 2035-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,111,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2035-10	[2],[6],[7],[8]
Fair Value			3,429,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,134 Government National Mortgage Association Pool, 4.68% 2061-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,134,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.68%	[2],[6],[7],[8]
Maturity			2061-10	[2],[6],[7],[8]
Fair Value			3,421,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,094 Government National Mortgage Association Pool, 5.54% 2060-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,094,000	[2],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.54%	[2],[6],[7],[8]
Maturity			2060-02	[2],[6],[7],[8]
Fair Value			3,420,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,469 Federal National Mortgage Association Pool, 3.50% 2042-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,469,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2042-06	[2],[6],[7],[8]
Fair Value			3,419,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,387 Federal Home Loan Mortgage Corporation Pool, 3.00% 2028-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,387,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2028-06	[2],[6],[7],[8]
Fair Value			3,412,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,421 Federal National Mortgage Association Pool, 3.50% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,421,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2043-01	[2],[6],[7],[8]
Fair Value			3,407,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,170 Federal National Mortgage Association Pool, 4.00% 2026-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,170,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2026-06	[2],[6],[7],[8]
Fair Value			3,362,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,200 Federal National Mortgage Association Pool, 3.50% 2028-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,200,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.50%	[2],[6],[7],[8]
Maturity			2028-11	[2],[6],[7],[8]
Fair Value			3,355,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,194 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,194,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-08	[2],[6],[7],[8]
Fair Value			3,294,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,203 Federal National Mortgage Association Pool, 3.00% 2028-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,203,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2028-06	[2],[6],[7],[8]
Fair Value			3,274,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,981 Federal National Mortgage Association Pool, 5.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			2,981,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2043-11	[2],[6],[7],[8]
Fair Value			3,261,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,218 Federal National Mortgage Association Pool, 3.00% 2028-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,218,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2028-03	[2],[6],[7],[8]
Fair Value			3,249,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,142 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,142,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.00%	[2],[6],[7],[8]
Maturity			2043-10	[2],[6],[7],[8]
Fair Value			3,247,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,124 Federal National Mortgage Association Pool, 3.00% 2028-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,124,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2028-07	[2],[6],[7],[8]
Fair Value			3,193,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,998 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			2,998,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2043-09	[2],[6],[7],[8]
Fair Value			3,191,000	[2],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,996 Federal National Mortgage Association Pool, 4.50% 2042-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			2,996,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.50%	[2],[6],[7],[8]
Maturity			2042-04	[2],[6],[7],[8]
Fair Value			3,182,000	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	1.84%	[1],[2],[3],[4],[5]	3.06%	[1],[2],[6],[7],[8]
Fair Value	14,957,000	[2],[3],[4],[5]	19,132,000	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	68,234,000	[2],[3],[4],[5]	97,796,000	[2],[6],[7],[8]
Investment Owned Description	Other Federal National Mortgage Association	[2],[3],[4],[5]	Other Federal National Mortgage Association	[2],[6],[7],[8]
Fair Value	9,768,000	[2],[3],[4],[5]	13,821,000	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	3.00%	[2],[3],[4],[5]	3.00%	[2],[6],[7],[8]
Maturity	2020-12	[2],[3],[4],[5]	2020-12	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	5.50%	[2],[3],[4],[5]	5.50%	[2],[6],[7],[8]
Maturity	2043-06	[2],[3],[4],[5]	2043-06	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	24,917,000	[2],[3],[4],[5]	21,959,000	[2],[6],[7],[8]
Investment Owned Description	Other Federal Home Loan Mortgage Corporation	[2],[3],[4],[5]	Other Federal Home Loan Mortgage Corporation	[2],[6],[7],[8]
Fair Value	3,663,000	[2],[3],[4],[5]	3,577,000	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	3.00%	[2],[3],[4],[5]	3.00%	[2],[6],[7],[8]
Maturity	2032-12	[2],[3],[4],[5]	2032-12	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	5.50%	[2],[3],[4],[5]	5.50%	[2],[6],[7],[8]
Maturity	2043-01	[2],[3],[4],[5]	2043-01	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	9,547,000	[2],[3],[4],[5]	10,460,000	[2],[6],[7],[8]
Investment Owned Description	Other Government National Mortgage Association	[2],[3],[4],[5]	Other Government National Mortgage Association	[2],[6],[7],[8]
Fair Value	1,526,000	[2],[3],[4],[5]	1,734,000	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	3.00%	[2],[3],[4],[5]	3.00%	[2],[6],[7],[8]
Maturity	2040-07	[2],[3],[4],[5]	2036-03	[2],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	4.75%	[2],[3],[4],[5]	5.50%	[2],[6],[7],[8]
Maturity	2042-11	[2],[3],[4],[5]	2042-11	[2],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	13.74%	[1],[2],[3],[4],[5]	15.47%	[1],[2],[6],[7],[8]
Current Principal/Notional Amount	112,448,000		101,150,000
Fair Value	111,624,000	[2],[3],[4],[5]	96,856,000	[2],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association (30 Year) 3.00% 2014-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	43,978,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association (30 Year)	[2],[3],[4],[5]
Rate	3.00%	[2],[3],[4],[5]
Maturity	2014-10	[2],[3],[4],[5]
Fair Value	43,347,000	[2],[3],[4],[5]
TBA - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation (30 Year) 3.50% 2014-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	23,750,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation (30 Year)	[2],[3],[4],[5]
Rate	3.50%	[2],[3],[4],[5]
Maturity	2014-10	[2],[3],[4],[5]
Fair Value	24,231,000	[2],[3],[4],[5]
TBA - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation (30 Year) 3.00% 2014-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	23,120,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation (30 Year)	[2],[3],[4],[5]
Rate	3.00%	[2],[3],[4],[5]
Maturity	2014-10	[2],[3],[4],[5]
Fair Value	22,815,000	[2],[3],[4],[5]
TBA - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association (30 Year) 3.00% 2014-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	21,600,000	[2],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association (30 Year)	[2],[3],[4],[5]
Rate	3.00%	[2],[3],[4],[5]
Maturity	2014-11	[2],[3],[4],[5]
Fair Value	21,231,000	[2],[3],[4],[5]
TBA - Fixed Rate Agency Securities [Member] | 63,300 Federal Home Loan Mortgage Corporation (30 Year) 3.00% 2014-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			63,300,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation (30 Year)	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2014-01	[2],[6],[7],[8]
Fair Value			60,016,000	[2],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | 31,150 Federal National Mortgage Association (30 Year) 3.00% 2014-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			31,150,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association (30 Year)	[2],[6],[7],[8]
Rate			3.00%	[2],[6],[7],[8]
Maturity			2014-01	[2],[6],[7],[8]
Fair Value			29,612,000	[2],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | 6,700 Federal Home Loan Mortgage Corporation (30 Year) 5.00% 2014-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,700,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation (30 Year)	[2],[6],[7],[8]
Rate			5.00%	[2],[6],[7],[8]
Maturity			2014-01	[2],[6],[7],[8]
Fair Value			7,228,000	[2],[6],[7],[8]
Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	139.61%	[1],[2],[3],[4],[5]	156.28%	[1],[2],[6],[7],[8]
Fair Value	1,133,825,000	[2],[3],[4],[5]	978,356,000	[2],[6],[7],[8]
Investment Owned, at Cost	1,124,947,000	[2],[3],[4],[5]	992,207,000	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	2.26%	[1],[2],[3],[4],[5]	4.89%	[1],[2],[6],[7],[8]
Fair Value	18,360,000	[2],[3],[4],[5]	30,618,000	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,543,000	[2],[3],[4],[5]	3,667,000	[2],[6],[7],[8]
Investment Owned Description	Other Federal National Mortgage Association Pools	[2],[3],[4],[5]	Other Federal National Mortgage Association Pools	[2],[6],[7],[8]
Fair Value	7,000,000	[2],[3],[4],[5]	3,900,000	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	5.04%	[2],[3],[4],[5]	2.64%	[2],[6],[7],[8]
Maturity	2035-09	[2],[3],[4],[5]	2036-04	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	6.05%	[2],[3],[4],[5]	6.05%	[2],[6],[7],[8]
Maturity	2037-09	[2],[3],[4],[5]	2037-09	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,662,000	[2],[3],[4],[5]	3,148,000	[2],[6],[7],[8]
Investment Owned Description	Other Federal Home Loan Mortgage Corporation Pools	[2],[3],[4],[5]	Other Federal Home Loan Mortgage Corporation Pools	[2],[6],[7],[8]
Fair Value	5,920,000	[2],[3],[4],[5]	3,341,000	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	2.36%	[2],[3],[4],[5]	5.83%	[2],[6],[7],[8]
Maturity	2037-06	[2],[3],[4],[5]	2037-06	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	5.94%	[2],[3],[4],[5]	5.89%	[2],[6],[7],[8]
Maturity	2044-05	[2],[3],[4],[5]	2037-07	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 5,085 Federal Home Loan Mortgage Corporation Pool 4.92% 2038-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,085,000	[2],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[2],[3],[4],[5]
Rate	4.92%	[2],[3],[4],[5]
Maturity	2038-04	[2],[3],[4],[5]
Fair Value	5,440,000	[2],[3],[4],[5]
Principal And Interest - Floating Rate Agency Securities [Member] | 6,281 Federal Home Loan Mortgage Corporation Pool, 4.92% 2038-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			6,281,000	[2],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[2],[6],[7],[8]
Rate			4.92%	[2],[6],[7],[8]
Maturity			2038-04	[2],[6],[7],[8]
Fair Value			6,709,000	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 4,935 Federal National Mortgage Association Pool, 4.27% 2040-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			4,935,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			4.27%	[2],[6],[7],[8]
Maturity			2040-04	[2],[6],[7],[8]
Fair Value			5,256,000	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,674 Federal National Mortgage Association Pool, 5.73% 2037-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,674,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			5.73%	[2],[6],[7],[8]
Maturity			2037-07	[2],[6],[7],[8]
Fair Value			3,937,000	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,646 Federal National Mortgage Association Pool, 2.53% 2038-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,646,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			2.53%	[2],[6],[7],[8]
Maturity			2038-05	[2],[6],[7],[8]
Fair Value			3,878,000	[2],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,395 Federal National Mortgage Association Pool, 6.1% 2037-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			3,395,000	[2],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[2],[6],[7],[8]
Rate			6.10%	[2],[6],[7],[8]
Maturity			2037-08	[2],[6],[7],[8]
Fair Value			3,597,000	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	2.91%	[1],[2],[3],[4],[5]	3.41%	[1],[2],[6],[7],[8]
Fair Value	23,615,000	[2],[3],[4],[5]	21,372,000	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	29,766,000	[2],[3],[4],[5]	25,322,000	[2],[6],[7],[8]
Investment Owned Description	Other Federal National Mortgage Association	[2],[3],[4],[5]	Other Federal National Mortgage Association	[2],[6],[7],[8]
Fair Value	5,161,000	[2],[3],[4],[5]	4,600,000	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	5.50%	[2],[3],[4],[5]	5.50%	[2],[6],[7],[8]
Maturity	2035-04	[2],[3],[4],[5]	2036-08	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	6.60%	[2],[3],[4],[5]	6.59%	[2],[6],[7],[8]
Maturity	2043-07	[2],[3],[4],[5]	2043-07	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	7,692,000	[2],[3],[4],[5]	18,180,000	[2],[6],[7],[8]
Investment Owned Description	Other Federal Home Loan Mortgage Corporation	[2],[3],[4],[5]	Other Federal Home Loan Mortgage Corporation	[2],[6],[7],[8]
Rate	5.85%	[2],[3],[4],[5]
Maturity	2039-08	[2],[3],[4],[5]
Fair Value	941,000	[2],[3],[4],[5]	2,433,000	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate			5.83%	[2],[6],[7],[8]
Maturity			2038-11	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate			6.53%	[2],[6],[7],[8]
Maturity			2039-08	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	192,100,000	[2],[3],[4],[5]	108,194,000	[2],[6],[7],[8]
Investment Owned Description	Other Government National Mortgage Association	[2],[3],[4],[5]	Other Government National Mortgage Association	[2],[6],[7],[8]
Fair Value	15,481,000	[2],[3],[4],[5]	11,987,000	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.39%	[2],[3],[4],[5]	1.64%	[2],[6],[7],[8]
Maturity	2042-11	[2],[3],[4],[5]	2042-11	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	6.60%	[2],[3],[4],[5]	6.58%	[2],[6],[7],[8]
Maturity	2063-10	[2],[3],[4],[5]	2063-08	[2],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Resecuritization of Government National Mortgage Association [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	21,706,000	[2],[3],[4],[5],[9]	22,796,000	[2],[6],[7],[8],[9]
Investment Owned Description	Resecuritization of Government National Mortgage Association (w)	[2],[3],[4],[5],[9]	Resecuritization of Government National Mortgage Association (t)	[2],[6],[7],[8],[9]
Rate	4.34%	[2],[3],[4],[5],[9]	4.34%	[2],[6],[7],[8],[9]
Maturity	2060-08	[2],[3],[4],[5],[9]	2060-08	[2],[6],[7],[8],[9]
Fair Value	2,032,000	[2],[3],[4],[5],[9]	2,352,000	[2],[6],[7],[8],[9]
Floating Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	5.17%	[1],[2],[3],[4],[5]	8.30%	[1],[2],[6],[7],[8]
Fair Value	41,975,000	[2],[3],[4],[5]	51,990,000	[2],[6],[7],[8]
Investment Owned, at Cost	40,824,000	[2],[3],[4],[5]	50,969,000	[2],[6],[7],[8]
Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	144.78%	[1],[2],[3],[4],[5]	164.58%	[1],[2],[6],[7],[8]
Fair Value	1,175,800,000	[2],[3],[4],[5]	1,030,346,000	[2],[6],[7],[8]
Investment Owned, at Cost	1,165,771,000	[2],[3],[4],[5]	1,043,176,000	[2],[6],[7],[8]
Principal And Interest - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	66.86%	[1],[2],[3],[4]	97.40%	[1],[2],[6],[7]
Fair Value	542,990,000	[2],[3],[4]	609,766,000	[2],[6],[7]
Investment Owned, at Cost	504,510,000	[2],[3],[4]	555,708,000	[2],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	866,595,000	[2],[3],[4]	920,032,000	[2],[6],[7]
Investment Owned Description	Various	[2],[3],[4]	Various	[2],[6],[7]
Fair Value	542,990,000	[2],[3],[4]	609,766,000	[2],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.00%	[2],[3],[4]	0.24%	[2],[6],[7]
Maturity	2015-07	[2],[3],[4]	2019-05	[2],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	9.35%	[2],[3],[4]	9.35%	[2],[6],[7]
Maturity	2061-01	[2],[3],[4]	2050-06	[2],[6],[7]
Principal Only - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.40%	[1],[2],[3],[4]	0.45%	[1],[2],[6],[7]
Fair Value	3,248,000	[2],[3],[4]	2,784,000	[2],[6],[7]
Investment Owned, at Cost	2,671,000	[2],[3],[4]	2,477,000	[2],[6],[7]
Principal Only - Private Label Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,800,000	[2],[3],[4]	5,800,000	[2],[6],[7]
Investment Owned Description	Various	[2],[3],[4]	Various	[2],[6],[7]
Rate	0.00%	[2],[3],[4]	0.00%	[2],[6],[7]
Maturity	2030-08	[2],[3],[4]	2030-08	[2],[6],[7]
Fair Value	3,248,000	[2],[3],[4]	2,784,000	[2],[6],[7]
Interest Only - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.27%	[1],[2],[3],[4]	0.19%	[1],[2],[6],[7]
Fair Value	2,149,000	[2],[3],[4]	1,216,000	[2],[6],[7]
Investment Owned, at Cost	1,387,000	[2],[3],[4]	519,000	[2],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	60,779,000	[2],[3],[4]	50,649,000	[2],[6],[7]
Investment Owned Description	Various	[2],[3],[4]	Various	[2],[6],[7]
Fair Value	2,149,000	[2],[3],[4]	1,216,000	[2],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.50%	[2],[3],[4]	0.50%	[2],[6],[7]
Maturity	2044-06	[2],[3],[4]	2044-06	[2],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	2.00%	[2],[3],[4]	2.00%	[2],[6],[7]
Maturity	2047-09	[2],[3],[4]	2047-09	[2],[6],[7]
Other Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.00%	[1],[2],[3],[4]	0.00%	[1],[2],[6],[7]
Fair Value	0	[2],[3],[4]	0	[2],[6],[7]
Investment Owned, at Cost	311,000	[2],[3],[4]	345,000	[2],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	114,905,000	[2],[3],[4]	127,491,000	[2],[6],[7]
Investment Owned Description	Various	[2],[3],[4]	Various	[2],[6],[7]
Rate	0.00%	[2],[3],[4]	0.00%	[2],[6],[7]
Fair Value	0	[2],[3],[4]	0	[2],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Maturity	2037-06	[2],[3],[4]	2037-06	[2],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Maturity	2047-10	[2],[3],[4]	2045-07	[2],[6],[7]
Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	67.53%	[1],[2],[3],[4]	98.04%	[1],[2],[6],[7]
Fair Value	548,387,000	[2],[3],[4]	613,766,000	[2],[6],[7]
Investment Owned, at Cost	508,879,000	[2],[3],[4]	559,049,000	[2],[6],[7]
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	212.31%	[1],[2],[3],[4]	262.62%	[1],[2],[6],[7]
Fair Value	1,724,187,000	[2],[3],[4]	1,644,112,000	[2],[6],[7]
Investment Owned, at Cost	1,674,650,000	[2],[3],[4]	1,602,225,000	[2],[6],[7]
Other Asset-backed Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity			6.08%	[1],[2],[6],[7]
Fair Value			38,069,000	[2],[6],[7]
Investment Owned, at Cost			38,758,000	[2],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			42,822,000	[2],[6],[7]
Investment Owned Description			Various	[2],[6],[7]
Fair Value			38,069,000	[2],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate			0.00%	[2],[6],[7]
Maturity			2017-06	[2],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate			9.74%	[2],[6],[7]
Maturity			2040-12	[2],[6],[7]
Other sset-backed securities and loans [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	13.44%	[1],[2],[3],[4]
Fair Value	109,152,000	[2],[3],[4]
Investment Owned, at Cost	110,423,000	[2],[3],[4]
Other sset-backed securities and loans [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	126,490,000	[2],[3],[4]
Investment Owned Description	Various	[2],[3],[4]
Fair Value	109,152,000	[2],[3],[4]
Other sset-backed securities and loans [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.00%	[2],[3],[4]
Maturity	2017-03	[2],[3],[4]
Other sset-backed securities and loans [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	9.73%	[2],[3],[4]
Maturity	2068-09	[2],[3],[4]
Commercial Mortgage Loans [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	3.68%	[1],[10],[2],[3],[4]	3.82%	[1],[11],[2],[6],[7]
Fair Value	29,852,000	[10],[2],[3],[4]	23,887,000	[11],[2],[6],[7]
Investment Owned, at Cost	29,850,000	[10],[2],[3],[4]	23,212,000	[11],[2],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	34,123,000	[10],[2],[3],[4]	26,227,000	[11],[2],[6],[7]
Investment Owned Description	Various	[10],[2],[3],[4]	Various	[11],[2],[6],[7]
Fair Value	29,852,000	[10],[2],[3],[4]	23,887,000	[11],[2],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.00%	[10],[2],[3],[4]	0.00%	[11],[2],[6],[7]
Maturity	2014-12	[10],[2],[3],[4]	2014-06	[11],[2],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	10.00%	[10],[2],[3],[4]	7.25%	[11],[2],[6],[7]
Maturity	2017-11	[10],[2],[3],[4]	2016-12	[11],[2],[6],[7]
Residential Mortgage Loans [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	2.11%	[1],[2],[3],[4]	3.84%	[1],[2],[6],[7]
Fair Value	17,147,000	[2],[3],[4]	24,062,000	[2],[6],[7]
Investment Owned, at Cost	16,324,000	[2],[3],[4]	24,062,000	[2],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	23,551,000	[2],[3],[4]	36,218,000	[2],[6],[7]
Investment Owned Description	Various	[2],[3],[4]	Various	[2],[6],[7]
Rate	0.00%	[2],[3],[4]	0.00%	[2],[6],[7]
Fair Value	17,147,000	[2],[3],[4]	24,062,000	[2],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Maturity	2018-02	[2],[3],[4]	2024-08
Residential Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Maturity	2054-05	[2],[3],[4]	2042-10
Real Estate Owned [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.92%	[1],[12],[2],[3],[4]
Fair Value	7,464,000	[12],[2],[3],[4]
Investment Owned, at Cost	7,252,000	[12],[2],[3],[4]
Real Estate Owned [Member] | Single-Family Houses [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	46	[12],[2],[3],[4]
Investment Owned Description	Single-Family Houses	[12],[2],[3],[4]
Fair Value	5,420,000	[12],[2],[3],[4]
Real Estate Owned [Member] | Commercial Property [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	1	[12],[2],[3],[4]
Investment Owned Description	Commercial Property	[12],[2],[3],[4]
Fair Value	2,044,000	[12],[2],[3],[4]
Private Corporate Investments [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.95%	[1],[2],[3],[4]
Fair Value	7,686,000	[2],[3],[4]
Investment Owned, at Cost	7,924,000	[2],[3],[4]
Private Corporate Investments [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.95%
Fair Value	7,686,000
Investment Owned, Balance, Shares	13,225,000
Investment Owned, at Cost	7,924,000
Private Corporate Investments [Member] | Preferred Stock [Member]
Schedule of Investments [Line Items]
Investment Owned Description	Preferred Equity Investment in Commercial Mortgage-related Partnership	[2],[3],[4]
Fair Value	5,000,000	[2],[3],[4]
Investment Owned, Balance, Shares	5,000,000	[2],[3],[4]
Private Corporate Investments [Member] | Equity in Mortgage Originator [Member]
Schedule of Investments [Line Items]
Investment Owned Description	Equity Investment in Mortgage Originator	[2],[3],[4]
Fair Value	2,686,000	[2],[3],[4]
Investment Owned, Balance, Shares	8,225,000	[2],[3],[4]
US Treasury Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	67.16%	[1],[2],[3],[4]
Fair Value	545,340,000	[2],[3],[4]
Investment Owned, at Cost	544,853,000	[2],[3],[4]
US Treasury Securities [Member] | U.S. Treasury Note 1.75% [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	526,091,000	[2],[3],[4]
Investment Owned Description	U.S. Treasury Note	[2],[3],[4]
Rate	1.75%	[2],[3],[4]
Maturity	2019-09	[2],[3],[4]
Fair Value	525,452,000	[2],[3],[4]
US Treasury Securities [Member] | U.S. Treasury Note 1.00% [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	12,223,000	[2],[3],[4]
Investment Owned Description	U.S. Treasury Note	[2],[3],[4]
Rate	100.00%	[2],[3],[4]
Maturity	2017-09	[2],[3],[4]
Fair Value	12,206,000	[2],[3],[4]
US Treasury Securities [Member] | US Treasury Notes 2.38% [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	7,769,000	[2],[3],[4]
Investment Owned Description	U.S. Treasury Note	[2],[3],[4]
Rate	238.00%	[2],[3],[4]
Maturity	2024-08	[2],[3],[4]
Fair Value	7,682,000	[2],[3],[4]
Long Investments [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	300.56%	[1],[2],[3],[4]	276.36%	[1],[2],[6],[7]
Current Principal/Notional Amount			2,478,291,000
Fair Value	2,440,828,000	[2],[3],[4]	1,730,130,000	[2],[6],[7]
Investment Owned, at Cost	2,391,276,000	[2],[3],[4]	1,688,257,000	[2],[6],[7]
Long Investments [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	294.75%		275.44%
Current Principal/Notional Amount	3,161,385,000		2,470,650,000
Fair Value	2,393,715,000		1,724,370,000
Investment Owned, at Cost	2,342,001,000		1,682,533,000
Long Investments [Member] | Europe [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	4.85%		0.92%
Current Principal/Notional Amount	43,235,000		7,641,000
Fair Value	39,427,000		5,760,000
Investment Owned, at Cost	41,351,000		5,724,000
Long Investments [Member] | Federal National Mortgage Association [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	92.40%		100.85%
Long Investments [Member] | Federal Home Loan Mortgage Corporation [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	44.08%		51.37%
Long Investments [Member] | Government National Mortgage Association [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	8.30%		12.36%
Commercial Mortgage Loan With Extendable Maturity [Member] | Commercial Mortgage Loans [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Fair Value			$ 5,000,000

[1] Classification percentages are based on Total Equity.

[2] See Note 2 and Note 3 in Notes to Consolidated Financial Statements.

[3] The table below shows the Company's long investment ratings from Moody's, Standard and Poor's, or Fitch, as well as the Company's long investments that were unrated but guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, or the Government National Mortgage Association. Ratings tend to be a lagging credit indicator; as a result, the credit quality of the Company's long investment holdings may be lower than the credit quality implied based on the ratings listed below. In situations where an investment has a split rating, the lowest provided rating is used. The ratings descriptions include ratings qualified with a "+," "-," "1," "2," or "3."Rating Description Percent of EquityUnrated but Agency-Guaranteed 144.78%A/A/A 0.64%Baa/BBB/BBB 4.59%Ba/BB/BB or below 66.71%Unrated 83.84%

[4] The following table details the breakout by geographical region of long investments, investments sold short, repurchase agreements, financial derivatives–assets, and financial derivatives–liabilities.Region Current Principal/Notional Value/Number of Properties/Number of Shares Cost/(Proceeds) Fair Value Percent ofEquityLong Investments: (In thousands, Expressed in U.S. Dollars) North America 3,161,385 $2,342,001 $2,393,715 294.75 %Europe 43,235 41,351 39,427 4.85 %North America (Common Stock) 13,225 7,924 7,686 0.95 %Total $2,391,276 $2,440,828 300.56 %Investments Sold Short: North America (TBAs and Government Debt) (1,121,387) $(1,178,095) $(1,178,831) (145.16)%Europe (Government Debt) (21,367) (24,110) (23,707) (2.92)%North America (Common Stock) (2,113) (20,838) (19,356) (2.38)%Total $(1,223,043) $(1,221,894) (150.46)%Repurchase Agreements: North America 20,046 $20,045 $20,045 2.47 %Europe 26,994 27,147 26,994 3.32 %Total 47,040 $47,192 $47,039 5.79 %Financial Derivatives–Assets: North America 634,538 $45,074 $56,365 6.94 %Europe (8,733) — 1 — %Total 625,805 $45,074 $56,366 6.94 %Financial Derivatives–Liabilities: North America (617,900) $(32,133) $(45,569) (5.61)%Europe (16,675) (1,817) (1,762) (0.22)%Total (634,575) $(33,950) $(47,331) (5.83)%

[5] At September 30, 2014, the Company's long investments guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association, represented 92.40%, 44.08%, and 8.30% of equity, respectively.

[6] The following table details the breakout by geographical region of long investments, investments sold short, and repurchase agreements. All financial derivatives were concentrated in North America.Region Current Principal/Notional Value/Number of Shares Cost/(Proceeds) Fair Value Percent ofEquityLong Investments: (In thousands, Expressed in U.S. Dollars) North America 2,470,650 $1,682,533 $1,724,370 275.44 %Europe 7,641 5,724 5,760 0.92 %Total 2,478,291 $1,688,257 $1,730,130 276.36 %Investments Sold Short: North America (TBAs and Government Debt) (804,888) $(833,656) $(831,564) (132.82)%Europe (Government Debt) (7,337) (7,633) (7,681) (1.23)%North America (Common Stock) (763) (6,313) (6,369) (1.02)%Total $(847,602) $(845,614) (135.07)%Repurchase Agreements: North America 19,675 $19,675 $19,675 3.15 %Europe 8,287 8,268 8,287 1.32 %Total 27,962 $27,943 $27,962 4.47 %

[7] The table below shows the ratings on the Company's long investments from Moody's, Standard and Poor's, or Fitch, as well as the Company's long investments that were unrated but guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, or the Government National Mortgage Association. Ratings tend to be a lagging credit indicator; as a result, the credit quality of the Company's long investment holdings may be lower than the credit quality implied based on the ratings listed below. In situations where an investment has a split rating, the lowest provided rating is used. The ratings descriptions include ratings qualified with a "+," "-," "1," "2," or "3."Rating Description Percent ofEquityUnrated but Agency-Guaranteed 164.58%A/A/A 0.34%Baa/BBB/BBB 2.97%Ba/BB/BB or below 97.95%Unrated 10.52%

[8] At December 31, 2013, the Company's long investments guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association, represented 100.85%, 51.37%, and 12.36% of equity, respectively.

[9] Private trust 100% backed by interest in Government National Mortgage Association collateralized mortgage obligation certificates.

[10] Includes non-performing commercial loans in the amount of $10.6 million whereby principal and/or interest is past due and a maturity date is not applicable.

[11] Includes a loan with a fair value in the amount of $5.0 million where the maturity date may be extended through November 4, 2015 as well as non-performing commercial mortgage loans.

[12] Number of properties not shown in thousands, represents actual number of properties owned.