Consolidated Condensed Schedule Of Investments (Long Investments) (USD $) Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Schedule of Investments [Line Items]
Fair Value	$ 2,172,082,000		$ 1,730,130,000
Investment Owned, at Cost	2,122,326,000		1,688,257,000
Percentage collaterallized by GNRCMO certificates	100.00%		100.00%
Non-performing loans, maturity date not applicable	11,300,000
Unrated But Agency-Guaranteed [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	163.60%		164.58%
Long Investment A Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	0.98%		0.34%
Long Investment BBB Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	5.62%		2.97%
Long Investment BB Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	80.65%		97.95%
Long Investment Unrated Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity	24.61%		10.52%
Principal And Interest - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	147.82%	[1],[2],[3],[4],[5]	137.75%	[1],[2],[6],[7],[8]
Fair Value	1,165,642,000	[1],[3],[4],[5]	862,368,000	[1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 25,298 Federal National Mortgage Association Pool 3.50% 2042-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	25,298,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2042-10	[1],[3],[4],[5]
Fair Value	26,448,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 16,987 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	16,987,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-10	[1],[3],[4],[5]
Fair Value	18,242,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 16,831 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	16,831,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-11	[1],[3],[4],[5]
Fair Value	18,129,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,372 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	15,372,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-11	[1],[3],[4],[5]
Fair Value	16,540,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,026 Federal National Mortgage Association Pool 5.00% 2041-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	14,026,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2041-08	[1],[3],[4],[5]
Fair Value	15,542,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,953 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	11,953,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-01	[1],[3],[4],[5]
Fair Value	13,171,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,043 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	12,043,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-08	[1],[3],[4],[5]
Fair Value	12,971,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 10,661 Federal National Mortgage Association Pool 5.00% 2041-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	10,661,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2041-03	[1],[3],[4],[5]
Fair Value	11,902,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,098 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	11,098,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-09	[1],[3],[4],[5]
Fair Value	11,855,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,186 Federal National Mortgage Association Pool 3.50% 2029-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	9,186,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2029-11	[1],[3],[4],[5]
Fair Value	9,749,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,317 Federal Home Loan Mortgage Corporation Pool 3.50% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	9,317,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	9,721,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,999 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	8,999,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-07	[1],[3],[4],[5]
Fair Value	9,639,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,269 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	8,269,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-08	[1],[3],[4],[5]
Fair Value	8,859,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,982 Federal National Mortgage Association Pool 3.50% 2029-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	7,982,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2029-12	[1],[3],[4],[5]
Fair Value	8,467,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,951 Federal Home Loan Mortgage Corporation Pool 3.50% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	7,951,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	8,319,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,051 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	7,051,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-10	[1],[3],[4],[5]
Fair Value	7,572,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,232 Federal Home Loan Mortgage Corporation Pool 3.50% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	7,232,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	7,549,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,983 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,983,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	7,514,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,999 Federal Home Loan Mortgage Corporation Pool 3.50% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,999,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	7,305,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,933 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,933,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2042-11	[1],[3],[4],[5]
Fair Value	7,274,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,436 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,436,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-02	[1],[3],[4],[5]
Fair Value	7,094,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,564 Federal National Mortgage Association Pool 3.50% 2028-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,564,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2028-03	[1],[3],[4],[5]
Fair Value	6,979,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,148 Federal National Mortgage Association Pool 5.00% 2044-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,148,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2044-03	[1],[3],[4],[5]
Fair Value	6,863,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,945 Government National Mortgage Association Pool 4.59% 2064-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,945,000	[1],[3],[4],[5]
Investment Owned Description	Government National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.59%	[1],[3],[4],[5]
Maturity	2064-11	[1],[3],[4],[5]
Fair Value	6,695,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,046 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	6,046,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-09	[1],[3],[4],[5]
Fair Value	6,459,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,782 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,782,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2043-10	[1],[3],[4],[5]
Fair Value	6,296,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,916 Federal National Mortgage Association Pool 4.50% 2026-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,916,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2026-04	[1],[3],[4],[5]
Fair Value	6,232,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,526 Federal National Mortgage Association Pool 4.50% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,526,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-02	[1],[3],[4],[5]
Fair Value	6,108,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,557 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,557,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	5,973,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,220 Federal National Mortgage Association Pool 5.00% 2044-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,220,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2044-03	[1],[3],[4],[5]
Fair Value	5,839,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,431 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,431,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-08	[1],[3],[4],[5]
Fair Value	5,822,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,410 Federal National Mortgage Association Pool 4.00% 2044-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,410,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-05	[1],[3],[4],[5]
Fair Value	5,819,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,708 Federal Home Loan Mortgage Corporation Pool 3.00% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,708,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	3.00%	[1],[3],[4],[5]
Maturity	2043-01	[1],[3],[4],[5]
Fair Value	5,788,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,402 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,402,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-08	[1],[3],[4],[5]
Fair Value	5,786,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,131 Federal National Mortgage Association Pool 5.50% 2039-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,131,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.50%	[1],[3],[4],[5]
Maturity	2039-10	[1],[3],[4],[5]
Fair Value	5,741,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,407 Federal National Mortgage Association Pool, 3.50% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,407,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	5,668,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,130 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,130,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-06	[1],[3],[4],[5]
Fair Value	5,502,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,414 Federal National Mortgage Association Pool 3.00% 2043-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,414,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.00%	[1],[3],[4],[5]
Maturity	2043-04	[1],[3],[4],[5]
Fair Value	5,489,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,058 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,058,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-07	[1],[3],[4],[5]
Fair Value	5,450,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,897 Federal National Mortgage Association Pool 4.50% 2043-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,897,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2043-12	[1],[3],[4],[5]
Fair Value	5,402,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,036 Federal National Mortgage Association Pool 3.50% 2029-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,036,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2029-11	[1],[3],[4],[5]
Fair Value	5,353,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,942 Federal National Mortgage Association Pool 4.00% 2044-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,942,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-05	[1],[3],[4],[5]
Fair Value	5,322,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,922 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,922,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-10	[1],[3],[4],[5]
Fair Value	5,304,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,981 Federal National Mortgage Association Pool 3.50% 2028-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,981,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2028-12	[1],[3],[4],[5]
Fair Value	5,290,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,662 Federal National Mortgage Association Pool 4.50% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,662,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-01	[1],[3],[4],[5]
Fair Value	5,146,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,708 Federal National Mortgage Association Pool 4.50% 2044-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,708,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-12	[1],[3],[4],[5]
Fair Value	5,120,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,585 Federal National Mortgage Association Pool 3.50% 2029-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,585,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2029-12	[1],[3],[4],[5]
Fair Value	4,864,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,413 Federal Home Loan Mortgage Corporation Pool 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,413,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2043-10	[1],[3],[4],[5]
Fair Value	4,861,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,487 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,487,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-02	[1],[3],[4],[5]
Fair Value	4,835,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,491 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,491,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-08	[1],[3],[4],[5]
Fair Value	4,810,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,468 Federal National Mortgage Association Pool 4.00% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,468,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-01	[1],[3],[4],[5]
Fair Value	4,783,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,443 Federal National Mortgage Association Pool 4.00% 2044-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,443,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-10	[1],[3],[4],[5]
Fair Value	4,750,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,358 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,358,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	4,689,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,246 Federal National Mortgage Association Pool 4.50% 2044-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,246,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-02	[1],[3],[4],[5]
Fair Value	4,666,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,131 Government National Mortgage Association Pool 4.68% 2064-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,131,000	[1],[3],[4],[5]
Investment Owned Description	Government National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.68%	[1],[3],[4],[5]
Maturity	2064-09	[1],[3],[4],[5]
Fair Value	4,647,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,108 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,108,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2043-10	[1],[3],[4],[5]
Fair Value	4,499,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,072 Federal National Mortgage Association Pool 4.50% 2044-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,072,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-03	[1],[3],[4],[5]
Fair Value	4,475,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,211 Federal National Mortgage Association Pool 3.50% 2029-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,211,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2029-05	[1],[3],[4],[5]
Fair Value	4,467,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,181 Government National Mortgage Association Pool 4.75% 2061-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,181,000	[1],[3],[4],[5]
Investment Owned Description	Government National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.75%	[1],[3],[4],[5]
Maturity	2061-01	[1],[3],[4],[5]
Fair Value	4,457,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,000 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,000,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2043-10	[1],[3],[4],[5]
Fair Value	4,444,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,838 Government National Mortgage Association Pool 4.61% 2064-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,838,000	[1],[3],[4],[5]
Investment Owned Description	Government National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.61%	[1],[3],[4],[5]
Maturity	2064-11	[1],[3],[4],[5]
Fair Value	4,322,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,962 Federal National Mortgage Association Pool 4.50% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,962,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2043-11	[1],[3],[4],[5]
Fair Value	4,308,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,141 Federal Home Loan Mortgage Corporation Pool 3.50% 2043-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	4,141,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2043-06	[1],[3],[4],[5]
Fair Value	4,298,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,809 Government National Mortgage Association Pool 4.63% 2064-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,809,000	[1],[3],[4],[5]
Investment Owned Description	Government National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.63%	[1],[3],[4],[5]
Maturity	2064-10	[1],[3],[4],[5]
Fair Value	4,295,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,943 Federal Home Loan Mortgage Corporation Pool 4.50% 2043-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,943,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2043-12	[1],[3],[4],[5]
Fair Value	4,294,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,997 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,997,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-06	[1],[3],[4],[5]
Fair Value	4,289,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,809 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,809,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2043-10	[1],[3],[4],[5]
Fair Value	4,259,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,784 Federal National Mortgage Association Pool 5.00% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,784,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	4,195,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,896 Federal National Mortgage Association Pool 4.00% 2044-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,896,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-10	[1],[3],[4],[5]
Fair Value	4,193,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,843 Federal National Mortgage Association Pool 4.50% 2044-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,843,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-03	[1],[3],[4],[5]
Fair Value	4,190,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,884 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,884,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2043-11	[1],[3],[4],[5]
Fair Value	4,180,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,922 Federal National Mortgage Association Pool 3.50% 2029-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,922,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.50%	[1],[3],[4],[5]
Maturity	2029-11	[1],[3],[4],[5]
Fair Value	4,170,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,807 Federal National Mortgage Corporation Pool 4.00% 2033-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,807,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2033-11	[1],[3],[4],[5]
Fair Value	4,123,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,656 Federal National Mortgage Association Pool 5.00% 2044-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,656,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2044-01	[1],[3],[4],[5]
Fair Value	4,121,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,816 Federal National Mortgage Association Pool 4.00% 2042-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,816,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2042-04	[1],[3],[4],[5]
Fair Value	4,098,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,683 Federal National Mortgage Association Pool 5.00% 2043-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,683,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2043-11	[1],[3],[4],[5]
Fair Value	4,086,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,661 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,661,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2043-10	[1],[3],[4],[5]
Fair Value	4,085,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,744 Federal National Mortgage Association Pool 4.50% 2044-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,744,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-11	[1],[3],[4],[5]
Fair Value	4,079,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,692 Federal National Mortgage Association Pool 4.50% 2044-12 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,692,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.50%	[1],[3],[4],[5]
Maturity	2044-12	[1],[3],[4],[5]
Fair Value	4,045,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,706 Federal National Mortgage Association Pool 4.00% 2044-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,706,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	4.00%	[1],[3],[4],[5]
Maturity	2044-10	[1],[3],[4],[5]
Fair Value	3,989,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,921 Federal National Mortgage Association Pool 3.00% 2043-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,921,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	3.00%	[1],[3],[4],[5]
Maturity	2043-01	[1],[3],[4],[5]
Fair Value	3,978,000	[1],[3],[4],[5]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,597 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,597,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association Pool	[1],[3],[4],[5]
Rate	5.00%	[1],[3],[4],[5]
Maturity	2043-10	[1],[3],[4],[5]
Fair Value	3,973,000	[1],[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	360,009,000	[1],[3],[4],[5]	111,228,000	[1],[6],[7],[8]
Investment Owned Description	Other Federal National Mortgage Association Pools	[1],[3],[4],[5]	Other Federal National Mortgage Association Pools	[1],[6],[7],[8]
Fair Value	389,510,000	[1],[3],[4],[5]	115,792,000	[1],[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%	[1],[3],[4],[5]	3.00%	[1],[6],[7],[8]
Maturity	2026-06	[1],[3],[4],[5]	2028-06	[1],[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%	[1],[3],[4],[5]	6.00%	[1],[6],[7],[8]
Maturity	2045-01	[1],[3],[4],[5]	2044-01	[1],[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	187,073,000	[1],[3],[4],[5]	80,675,000	[1],[6],[7],[8]
Investment Owned Description	Other Federal Home Loan Mortgage Corporation Pools	[1],[3],[4],[5]	Other Federal Home Loan Mortgage Corporation Pools	[1],[6],[7],[8]
Fair Value	200,541,000	[1],[3],[4],[5]	81,716,000	[1],[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%	[1],[3],[4],[5]	2.50%	[1],[6],[7],[8]
Maturity	2028-03	[1],[3],[4],[5]	2028-09	[1],[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%	[1],[3],[4],[5]	6.00%	[1],[6],[7],[8]
Maturity	2045-01	[1],[3],[4],[5]	2043-12	[1],[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	26,938,000	[1],[3],[4],[5]	8,191,000	[1],[6],[7],[8]
Investment Owned Description	Other Government National Mortgage Association Pools	[1],[3],[4],[5]	Other Government National Mortgage Association Pools	[1],[6],[7],[8]
Fair Value	29,466,000	[1],[3],[4],[5]	8,949,000	[1],[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%	[1],[3],[4],[5]	4.49%	[1],[6],[7],[8]
Maturity	2060-02	[1],[3],[4],[5]	2061-11	[1],[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%	[1],[3],[4],[5]	4.68%	[1],[6],[7],[8]
Maturity	2064-11	[1],[3],[4],[5]	2062-11	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2043-01	[1],[6],[7],[8]
Fair Value			37,742,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2042-10	[1],[6],[7],[8]
Fair Value			27,407,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-11	[1],[6],[7],[8]
Fair Value			18,327,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2043-04	[1],[6],[7],[8]
Fair Value			17,322,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2041-08	[1],[6],[7],[8]
Fair Value			16,910,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2028-06	[1],[6],[7],[8]
Fair Value			16,729,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-11	[1],[6],[7],[8]
Fair Value			16,279,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2041-10	[1],[6],[7],[8]
Fair Value			15,958,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2041-09	[1],[6],[7],[8]
Fair Value			15,743,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			13,783,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2041-07	[1],[6],[7],[8]
Fair Value			13,692,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2041-03	[1],[6],[7],[8]
Fair Value			13,444,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			12,005,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			11,861,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2042-08	[1],[6],[7],[8]
Fair Value			11,263,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-07	[1],[6],[7],[8]
Fair Value			9,979,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			9,409,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2041-10	[1],[6],[7],[8]
Fair Value			9,378,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-12	[1],[6],[7],[8]
Fair Value			9,326,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2043-02	[1],[6],[7],[8]
Fair Value			9,251,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-11	[1],[6],[7],[8]
Fair Value			9,013,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2026-04	[1],[6],[7],[8]
Fair Value			7,898,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			7,326,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2042-11	[1],[6],[7],[8]
Fair Value			7,299,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			7,005,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.50%	[1],[6],[7],[8]
Maturity			2039-10	[1],[6],[7],[8]
Fair Value			6,946,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-09	[1],[6],[7],[8]
Fair Value			6,865,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-12	[1],[6],[7],[8]
Fair Value			6,418,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			6,228,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			6,218,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.46%	[1],[6],[7],[8]
Maturity			2063-02	[1],[6],[7],[8]
Fair Value			6,136,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			6,083,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2042-04	[1],[6],[7],[8]
Fair Value			6,035,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2043-01	[1],[6],[7],[8]
Fair Value			5,967,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			5,925,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			5,867,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.54%	[1],[6],[7],[8]
Maturity			2062-11	[1],[6],[7],[8]
Fair Value			5,859,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.58%	[1],[6],[7],[8]
Maturity			2062-10	[1],[6],[7],[8]
Fair Value			5,733,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.63%	[1],[6],[7],[8]
Maturity			2061-06	[1],[6],[7],[8]
Fair Value			5,688,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2043-04	[1],[6],[7],[8]
Fair Value			5,676,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.60%	[1],[6],[7],[8]
Maturity			2062-06	[1],[6],[7],[8]
Fair Value			5,672,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-11	[1],[6],[7],[8]
Fair Value			5,668,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2026-07	[1],[6],[7],[8]
Fair Value			5,593,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			5,460,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			5,442,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-01	[1],[6],[7],[8]
Fair Value			5,063,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			4,897,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2042-04	[1],[6],[7],[8]
Fair Value			4,873,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2043-06	[1],[6],[7],[8]
Fair Value			4,776,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			4,768,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-11	[1],[6],[7],[8]
Fair Value			4,758,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			4,754,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			4,715,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-09	[1],[6],[7],[8]
Fair Value			4,625,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			4,586,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2043-02	[1],[6],[7],[8]
Fair Value			4,435,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			4,423,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			4,387,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-11	[1],[6],[7],[8]
Fair Value			4,372,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.69%	[1],[6],[7],[8]
Maturity			2061-07	[1],[6],[7],[8]
Fair Value			4,288,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.75%	[1],[6],[7],[8]
Maturity			2061-01	[1],[6],[7],[8]
Fair Value			4,213,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2040-11	[1],[6],[7],[8]
Fair Value			4,203,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2044-01	[1],[6],[7],[8]
Fair Value			4,169,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.80%	[1],[6],[7],[8]
Maturity			2061-02	[1],[6],[7],[8]
Fair Value			4,157,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2043-06	[1],[6],[7],[8]
Fair Value			4,137,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			4,043,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-11	[1],[6],[7],[8]
Fair Value			3,885,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-12	[1],[6],[7],[8]
Fair Value			3,837,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2028-03	[1],[6],[7],[8]
Fair Value			3,810,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.66%	[1],[6],[7],[8]
Maturity			2063-01	[1],[6],[7],[8]
Fair Value			3,772,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2040-12	[1],[6],[7],[8]
Fair Value			3,759,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			3,715,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			3,710,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			3,683,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			3,613,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			3,608,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			3,479,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2043-06	[1],[6],[7],[8]
Fair Value			3,454,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2035-10	[1],[6],[7],[8]
Fair Value			3,429,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.68%	[1],[6],[7],[8]
Maturity			2061-10	[1],[6],[7],[8]
Fair Value			3,421,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Government National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.54%	[1],[6],[7],[8]
Maturity			2060-02	[1],[6],[7],[8]
Fair Value			3,420,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2042-06	[1],[6],[7],[8]
Fair Value			3,419,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2028-06	[1],[6],[7],[8]
Fair Value			3,412,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2043-01	[1],[6],[7],[8]
Fair Value			3,407,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2026-06	[1],[6],[7],[8]
Fair Value			3,362,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.50%	[1],[6],[7],[8]
Maturity			2028-11	[1],[6],[7],[8]
Fair Value			3,355,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-08	[1],[6],[7],[8]
Fair Value			3,294,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2028-06	[1],[6],[7],[8]
Fair Value			3,274,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2043-11	[1],[6],[7],[8]
Fair Value			3,261,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2028-03	[1],[6],[7],[8]
Fair Value			3,249,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.00%	[1],[6],[7],[8]
Maturity			2043-10	[1],[6],[7],[8]
Fair Value			3,247,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2028-07	[1],[6],[7],[8]
Fair Value			3,193,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2043-09	[1],[6],[7],[8]
Fair Value			3,191,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.50%	[1],[6],[7],[8]
Maturity			2042-04	[1],[6],[7],[8]
Fair Value			3,182,000	[1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	1.20%	[1],[2],[3],[4],[5]	3.06%	[1],[2],[6],[7],[8]
Fair Value	9,441,000	[1],[3],[4],[5]	19,132,000	[1],[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	56,737,000	[1],[3],[4],[5]	97,796,000	[1],[6],[7],[8]
Investment Owned Description	Other Federal National Mortgage Association	[1],[3],[4],[5]	Other Federal National Mortgage Association	[1],[6],[7],[8]
Fair Value	6,971,000	[1],[3],[4],[5]	13,821,000	[1],[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%	[1],[3],[4],[5]	3.00%	[1],[6],[7],[8]
Maturity	2020-12	[1],[3],[4],[5]	2020-12	[1],[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%	[1],[3],[4],[5]	5.50%	[1],[6],[7],[8]
Maturity	2043-06	[1],[3],[4],[5]	2043-06	[1],[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	16,165,000	[1],[3],[4],[5]	21,959,000	[1],[6],[7],[8]
Investment Owned Description	Other Federal Home Loan Mortgage Corporation	[1],[3],[4],[5]	Other Federal Home Loan Mortgage Corporation	[1],[6],[7],[8]
Fair Value	2,009,000	[1],[3],[4],[5]	3,577,000	[1],[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	3.50%	[1],[3],[4],[5]	3.00%	[1],[6],[7],[8]
Maturity	2032-12	[1],[3],[4],[5]	2032-12	[1],[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%	[1],[3],[4],[5]	5.50%	[1],[6],[7],[8]
Maturity	2040-03	[1],[3],[4],[5]	2043-01	[1],[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	2,142,000	[1],[3],[4],[5]	10,460,000	[1],[6],[7],[8]
Investment Owned Description	Other Government National Mortgage Association	[1],[3],[4],[5]	Other Government National Mortgage Association	[1],[6],[7],[8]
Rate	4.75%	[1],[3],[4],[5]
Maturity	2040-07	[1],[3],[4],[5]
Fair Value	461,000	[1],[3],[4],[5]	1,734,000	[1],[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%	[1],[6],[7],[8]
Maturity			2036-03	[1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate			5.50%	[1],[6],[7],[8]
Maturity			2042-11	[1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	9.18%	[1],[2],[3],[4],[5]	15.47%	[1],[2],[6],[7],[8]
Current Principal/Notional Amount	71,598,000		101,150,000
Fair Value	72,410,000	[1],[3],[4],[5]	96,856,000	[1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association (30 Year) [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	44,478,000	[1],[3],[4],[5]
Investment Owned Description	Federal National Mortgage Association (30 Year)	[1],[3],[4],[5]
Rate	3.00%	[1],[3],[4],[5]
Maturity	2015-01	[1],[3],[4],[5]
Fair Value	45,015,000	[1],[3],[4],[5]
TBA - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation (30 Year) [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	27,120,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation (30 Year)	[1],[3],[4],[5]
Rate	3.00%	[1],[3],[4],[5]
Maturity	2015-01	[1],[3],[4],[5]
Fair Value	27,395,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation (30 Year)	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2014-01	[1],[6],[7],[8]
Fair Value			60,016,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association (30 Year)	[1],[6],[7],[8]
Rate			3.00%	[1],[6],[7],[8]
Maturity			2014-01	[1],[6],[7],[8]
Fair Value			29,612,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation (30 Year)	[1],[6],[7],[8]
Rate			5.00%	[1],[6],[7],[8]
Maturity			2014-01	[1],[6],[7],[8]
Fair Value			7,228,000	[1],[6],[7],[8]
Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	158.20%	[1],[2],[3],[4],[5]	156.28%	[1],[2],[6],[7],[8]
Fair Value	1,247,493,000	[1],[3],[4],[5]	978,356,000	[1],[6],[7],[8]
Investment Owned, at Cost	1,230,414,000	[1],[3],[4],[5]	992,207,000	[1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	2.62%	[1],[2],[3],[4],[5]	4.89%	[1],[2],[6],[7],[8]
Fair Value	20,647,000	[1],[3],[4],[5]	30,618,000	[1],[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	6,265,000	[1],[3],[4],[5]	3,667,000	[1],[6],[7],[8]
Investment Owned Description	Other Federal National Mortgage Association Pools	[1],[3],[4],[5]	Other Federal National Mortgage Association Pools	[1],[6],[7],[8]
Fair Value	6,692,000	[1],[3],[4],[5]	3,900,000	[1],[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%	[1],[3],[4],[5]	2.64%	[1],[6],[7],[8]
Maturity	2035-09	[1],[3],[4],[5]	2036-04	[1],[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%	[1],[3],[4],[5]	6.05%	[1],[6],[7],[8]
Maturity	2037-09	[1],[3],[4],[5]	2037-09	[1],[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	4,653,000	[1],[3],[4],[5]	3,148,000	[1],[6],[7],[8]
Investment Owned Description	Other Federal Home Loan Mortgage Corporation Pools	[1],[3],[4],[5]	Other Federal Home Loan Mortgage Corporation Pools	[1],[6],[7],[8]
Fair Value	4,876,000	[1],[3],[4],[5]	3,341,000	[1],[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%	[1],[3],[4],[5]	5.83%	[1],[6],[7],[8]
Maturity	2037-06	[1],[3],[4],[5]	2037-06	[1],[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%	[1],[3],[4],[5]	5.89%	[1],[6],[7],[8]
Maturity	2044-05	[1],[3],[4],[5]	2037-07	[1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	3,404,000	[1],[3],[4],[5]
Investment Owned Description	Other Government National Mortgage Association Pool	[1],[3],[4],[5]
Rate	2.47%	[1],[3],[4],[5]
Maturity	2064-11	[1],[3],[4],[5]
Fair Value	3,673,000	[1],[3],[4],[5]
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	5,084,000	[1],[3],[4],[5]
Investment Owned Description	Federal Home Loan Mortgage Corporation Pool	[1],[3],[4],[5]
Rate	4.92%	[1],[3],[4],[5]
Maturity	2038-04	[1],[3],[4],[5]
Fair Value	5,406,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal Home Loan Mortgage Corporation Pool	[1],[6],[7],[8]
Rate			4.92%	[1],[6],[7],[8]
Maturity			2038-04	[1],[6],[7],[8]
Fair Value			6,709,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			4.27%	[1],[6],[7],[8]
Maturity			2040-04	[1],[6],[7],[8]
Fair Value			5,256,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			5.73%	[1],[6],[7],[8]
Maturity			2037-07	[1],[6],[7],[8]
Fair Value			3,937,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			2.53%	[1],[6],[7],[8]
Maturity			2038-05	[1],[6],[7],[8]
Fair Value			3,878,000	[1],[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	[1],[6],[7],[8]
Investment Owned Description			Federal National Mortgage Association Pool	[1],[6],[7],[8]
Rate			6.10%	[1],[6],[7],[8]
Maturity			2037-08	[1],[6],[7],[8]
Fair Value			3,597,000	[1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	2.78%	[1],[2],[3],[4],[5]	3.41%	[1],[2],[6],[7],[8]
Fair Value	21,944,000	[1],[3],[4],[5]	21,372,000	[1],[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	28,251,000	[1],[3],[4],[5]	25,322,000	[1],[6],[7],[8]
Investment Owned Description	Other Federal National Mortgage Association	[1],[3],[4],[5]	Other Federal National Mortgage Association	[1],[6],[7],[8]
Fair Value	4,508,000	[1],[3],[4],[5]	4,600,000	[1],[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%	[1],[3],[4],[5]	5.50%	[1],[6],[7],[8]
Maturity	2035-04	[1],[3],[4],[5]	2036-08	[1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	6.58%	[1],[3],[4],[5]	6.59%	[1],[6],[7],[8]
Maturity	2043-07	[1],[3],[4],[5]	2043-07	[1],[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	13,048,000	[1],[3],[4],[5]	18,180,000	[1],[6],[7],[8]
Investment Owned Description	Other Federal Home Loan Mortgage Corporation	[1],[3],[4],[5]	Other Federal Home Loan Mortgage Corporation	[1],[6],[7],[8]
Fair Value	1,872,000	[1],[3],[4],[5]	2,433,000	[1],[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	5.84%	[1],[3],[4],[5]	5.83%	[1],[6],[7],[8]
Maturity	2036-03	[1],[3],[4],[5]	2038-11	[1],[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	6.47%	[1],[3],[4],[5]	6.53%	[1],[6],[7],[8]
Maturity	2039-08	[1],[3],[4],[5]	2039-08	[1],[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	183,794,000	[1],[3],[4],[5]	108,194,000	[1],[6],[7],[8]
Investment Owned Description	Other Government National Mortgage Association	[1],[3],[4],[5]	Other Government National Mortgage Association	[1],[6],[7],[8]
Fair Value	13,591,000	[1],[3],[4],[5]	11,987,000	[1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.40%	[1],[3],[4],[5]	1.64%	[1],[6],[7],[8]
Maturity	2042-11	[1],[3],[4],[5]	2042-11	[1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	6.58%	[1],[3],[4],[5]	6.58%	[1],[6],[7],[8]
Maturity	2063-10	[1],[3],[4],[5]	2063-08	[1],[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	21,145,000	[1],[3],[4],[5],[9]	22,796,000	[1],[6],[7],[8],[9]
Investment Owned Description	Resecuritization of Government National Mortgage Association (w)	[1],[3],[4],[5],[9]	Resecuritization of Government National Mortgage Association (t)	[1],[6],[7],[8],[9]
Rate	4.34%	[1],[3],[4],[5],[9]	4.34%	[1],[6],[7],[8],[9]
Maturity	2060-08	[1],[3],[4],[5],[9]	2060-08	[1],[6],[7],[8],[9]
Fair Value	1,973,000	[1],[3],[4],[5],[9]	2,352,000	[1],[6],[7],[8],[9]
Floating Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	5.40%	[1],[2],[3],[4],[5]	8.30%	[1],[2],[6],[7],[8]
Fair Value	42,591,000	[1],[3],[4],[5]	51,990,000	[1],[6],[7],[8]
Investment Owned, at Cost	41,787,000	[1],[3],[4],[5]	50,969,000	[1],[6],[7],[8]
Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	163.60%	[1],[2],[3],[4],[5]	164.58%	[1],[2],[6],[7],[8]
Fair Value	1,290,084,000	[1],[3],[4],[5]	1,030,346,000	[1],[6],[7],[8]
Investment Owned, at Cost	1,272,201,000	[1],[3],[4],[5]	1,043,176,000	[1],[6],[7],[8]
Principal And Interest - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	76.95%	[1],[2],[3],[4]	97.40%	[1],[2],[6],[7]
Fair Value	606,757,000	[1],[3],[4]	609,766,000	[1],[6],[7]
Investment Owned, at Cost	571,834,000	[1],[3],[4]	555,708,000	[1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	963,038,000	[1],[3],[4]	920,032,000	[1],[6],[7]
Investment Owned Description	Various	[1],[3],[4]	Various	[1],[6],[7]
Fair Value	606,757,000	[1],[3],[4]	609,766,000	[1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.00%	[1],[3],[4]	0.24%	[1],[6],[7]
Maturity	2015-07	[1],[3],[4]	2019-05	[1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	12.25%	[1],[3],[4]	9.35%	[1],[6],[7]
Maturity	2061-01	[1],[3],[4]	2050-06	[1],[6],[7]
Principal Only - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.41%	[1],[2],[3],[4]	0.45%	[1],[2],[6],[7]
Fair Value	3,248,000	[1],[3],[4]	2,784,000	[1],[6],[7]
Investment Owned, at Cost	2,737,000	[1],[3],[4]	2,477,000	[1],[6],[7]
Principal Only - Private Label Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	5,800,000	[1],[3],[4]	5,800,000	[1],[6],[7]
Investment Owned Description	Various	[1],[3],[4]	Various	[1],[6],[7]
Rate	0.00%	[1],[3],[4]	0.00%	[1],[6],[7]
Maturity	2030-08	[1],[3],[4]	2030-08	[1],[6],[7]
Fair Value	3,248,000	[1],[3],[4]	2,784,000	[1],[6],[7]
Interest Only - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.31%	[1],[2],[3],[4]	0.19%	[1],[2],[6],[7]
Fair Value	2,423,000	[1],[3],[4]	1,216,000	[1],[6],[7]
Investment Owned, at Cost	1,602,000	[1],[3],[4]	519,000	[1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	65,223,000	[1],[3],[4]	50,649,000	[1],[6],[7]
Investment Owned Description	Various	[1],[3],[4]	Various	[1],[6],[7]
Fair Value	2,423,000	[1],[3],[4]	1,216,000	[1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.50%	[1],[3],[4]	0.50%	[1],[6],[7]
Maturity	2044-06	[1],[3],[4]	2044-06	[1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	2.00%	[1],[3],[4]	2.00%	[1],[6],[7]
Maturity	2047-12	[1],[3],[4]	2047-09	[1],[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	[1],[3],[4]	0	[1],[6],[7]
Investment Owned, at Cost	302,000	[1],[3],[4]	345,000	[1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	111,629,000	[1],[3],[4]	127,491,000	[1],[6],[7]
Investment Owned Description	Various	[1],[3],[4]	Various	[1],[6],[7]
Rate	0.00%	[1],[3],[4]	0.00%	[1],[6],[7]
Fair Value	0	[1],[3],[4]	0	[1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Maturity	2037-06	[1],[3],[4]	2037-06	[1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Maturity	2047-10	[1],[3],[4]	2045-07	[1],[6],[7]
Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	77.67%	[1],[2],[3],[4]	98.04%	[1],[2],[6],[7]
Fair Value	612,428,000	[1],[3],[4]	613,766,000	[1],[6],[7]
Investment Owned, at Cost	576,475,000	[1],[3],[4]	559,049,000	[1],[6],[7]
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	241.27%	[1],[2],[3],[4]	262.62%	[1],[2],[6],[7]
Fair Value	1,902,512,000	[1],[3],[4]	1,644,112,000	[1],[6],[7]
Investment Owned, at Cost	1,848,676,000	[1],[3],[4]	1,602,225,000	[1],[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	[1],[6],[7]
Investment Owned, at Cost			38,758,000	[1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount			42,822,000	[1],[6],[7]
Investment Owned Description			Various	[1],[6],[7]
Fair Value			38,069,000	[1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate			0.00%	[1],[6],[7]
Maturity			2017-06	[1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate			9.74%	[1],[6],[7]
Maturity			2040-12	[1],[6],[7]
Other asset-backed securities and loans [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	18.55%	[1],[2],[3],[4]
Fair Value	146,288,000	[1],[3],[4]
Investment Owned, at Cost	149,386,000	[1],[3],[4]
Other asset-backed securities and loans [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	169,458,000	[1],[3],[4]
Investment Owned Description	Various	[1],[3],[4]
Fair Value	146,288,000	[1],[3],[4]
Other asset-backed securities and loans [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.00%	[1],[3],[4]
Maturity	2015-06	[1],[3],[4]
Other asset-backed securities and loans [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	49.00%	[1],[3],[4]
Maturity	2068-09	[1],[3],[4]
Corporate Debt [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	5.41%	[1],[2],[3],[4]
Fair Value	42,708,000	[1],[3],[4]
Investment Owned, at Cost	43,585,000	[1],[3],[4]
Corporate Debt [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	46,006,000	[1],[3],[4]
Investment Owned Description	Various	[1],[3],[4]
Fair Value	42,708,000	[1],[3],[4]
Corporate Debt [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	5.25%	[1],[3],[4]
Maturity	2016-06	[1],[3],[4]
Corporate Debt [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	15.00%	[1],[3],[4]
Maturity	2021-09	[1],[3],[4]
Commercial Mortgage Loans [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	3.59%	[1],[10],[2],[3],[4]	3.82%	[1],[11],[2],[6],[7]
Fair Value	28,309,000	[1],[10],[3],[4]	23,887,000	[1],[11],[6],[7]
Investment Owned, at Cost	28,266,000	[1],[10],[3],[4]	23,212,000	[1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	32,519,000	[1],[10],[3],[4]	26,227,000	[1],[11],[6],[7]
Investment Owned Description	Various	[1],[10],[3],[4]	Various	[1],[11],[6],[7]
Fair Value	28,309,000	[1],[10],[3],[4]	23,887,000	[1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Rate	0.00%	[1],[10],[3],[4]	0.00%	[1],[11],[6],[7]
Maturity	2015-01	[1],[10],[3],[4]	2014-06	[1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Rate	10.00%	[1],[10],[3],[4]	7.25%	[1],[11],[6],[7]
Maturity	2017-11	[1],[10],[3],[4]	2016-12	[1],[11],[6],[7]
Residential Mortgage Loans [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	3.49%	[1],[2],[3],[4]	3.84%	[1],[2],[6],[7]
Fair Value	27,482,000	[1],[3],[4]	24,062,000	[1],[6],[7]
Investment Owned, at Cost	27,398,000	[1],[3],[4]	24,062,000	[1],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	44,336,000	[1],[3],[4]	36,218,000	[1],[6],[7]
Investment Owned Description	Various	[1],[3],[4]	Various	[1],[6],[7]
Rate	0.00%	[1],[3],[4]	0.00%	[1],[6],[7]
Fair Value	27,482,000	[1],[3],[4]	24,062,000	[1],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member]
Schedule of Investments [Line Items]
Maturity	2018-02	[1],[3],[4]	2024-08	[1],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member]
Schedule of Investments [Line Items]
Maturity	2054-10	[1],[3],[4]	2042-10	[1],[6],[7]
Real Estate Owned [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	1.10%	[1],[12],[2],[3],[4]
Fair Value	8,635,000	[1],[12],[3],[4]
Investment Owned, at Cost	8,748,000	[1],[12],[3],[4]
Real Estate Owned [Member] | Single-Family Houses [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	50	[1],[12],[3],[4]
Investment Owned Description	Single-Family Houses	[1],[12],[3],[4]
Fair Value	6,591,000	[1],[12],[3],[4]
Real Estate Owned [Member] | Commercial Property [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	1	[1],[12],[3],[4]
Investment Owned Description	Commercial Property	[1],[12],[3],[4]
Fair Value	2,044,000	[1],[12],[3],[4]
Private Corporate Investments [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	1.84%	[1],[2],[3],[4]
Fair Value	14,512,000	[1],[3],[4]
Investment Owned, at Cost	14,717,000	[1],[3],[4]
Private Corporate Investments [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	1.84%
Fair Value	14,512,000
Investment Owned, at Cost	14,717,000
Private Corporate Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-related Private Partnership
Schedule of Investments [Line Items]
Investment Owned Description	Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-Related Private Partnership	[1],[3],[4]
Fair Value	6,241,000	[1],[3],[4]
Investment Owned, Balance, Shares	6,241	[1],[3],[4]
Private Corporate Investments [Member] | Non-Exchange Traded Corporate Equity [Member]
Schedule of Investments [Line Items]
Investment Owned Description	Non-Exchange Traded Corporate Equity	[1],[3],[4]
Fair Value	2,860,000	[1],[3],[4]
Investment Owned, Balance, Shares	88	[1],[3],[4]
Private Corporate Investments [Member] | Non-controlling Interest in Mortgage-related Private Partnership [Member]
Schedule of Investments [Line Items]
Investment Owned Description	Non-Controlling Interest in Mortgage-Related Private Partnership	[1],[3],[4]
Fair Value	2,673,000	[1],[3],[4]
Private Corporate Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Mortgage Originators [Member]
Schedule of Investments [Line Items]
Investment Owned Description	Non-Exchange Traded Preferred Equity Investment in Mortgage Originators	[1],[3],[4]
Fair Value	2,500,000	[1],[3],[4]
Investment Owned, Balance, Shares	7,657	[1],[3],[4]
Private Corporate Investments [Member] | Non-Exchange Traded Equity Investment in Mortgage Originator
Schedule of Investments [Line Items]
Investment Owned Description	Non-Exchange Traded Equity Investment in Mortgage Originators	[1],[3],[4]
Fair Value	238,000	[1],[3],[4]
Investment Owned, Balance, Shares	728	[1],[3],[4]
US Treasury Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	0.21%	[1],[2],[3],[4]
Fair Value	1,636,000	[1],[3],[4]
Investment Owned, at Cost	1,550,000	[1],[3],[4]
US Treasury Securities [Member] | US Treasury Bond [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	1,560,000	[1],[3],[4]
Investment Owned Description	U.S. Treasury Bond	[1],[3],[4]
Rate	3.00%	[1],[3],[4]
Maturity	2044-11	[1],[3],[4]
Fair Value	1,636,000	[1],[3],[4]
Long Investments [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	275.46%	[1],[2],[3],[4]	276.36%	[1],[2],[6],[7]
Current Principal/Notional Amount			2,478,291,000
Fair Value	2,172,082,000	[1],[3],[4]	1,730,130,000	[1],[6],[7]
Investment Owned, at Cost	2,122,326,000	[1],[3],[4]	1,688,257,000	[1],[6],[7]
Long Investments [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	264.46%		275.44%
Current Principal/Notional Amount	2,863,057,000		2,470,650,000
Fair Value	2,092,959,000		1,724,370,000
Investment Owned, at Cost	2,038,249,000		1,682,533,000
Long Investments [Member] | Europe [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	9.16%		0.92%
Current Principal/Notional Amount	69,724,000		7,641,000
Fair Value	64,611,000		5,760,000
Investment Owned, at Cost	69,360,000		5,724,000
Long Investments [Member] | Federal National Mortgage Association [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	100.30%		100.85%
Long Investments [Member] | Federal Home Loan Mortgage Corporation [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	53.97%		51.37%
Long Investments [Member] | Government National Mortgage Association [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	9.33%		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] See Note 2 and Note 3 in Notes to Consolidated Financial Statements.

[2] Classification percentages are based on Total Equity.

[3] 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 2,863,057 $2,038,249 $2,092,959 264.46 %Europe 69,724 69,360 64,611 9.16 %North America (Private Corporate Investments) n/a 14,717 14,512 1.84 %Total $2,122,326 $2,172,082 275.46 %Investments Sold Short: North America (TBAs and Government Debt) (1,159,703) $(1,230,478) $(1,234,248) (156.53)%Europe (Government Debt) (28,118) (32,008) (30,606) (3.88)%North America (Common Stock) (2,986) (27,605) (26,516) (3.36)%Total $(1,290,091) $(1,291,370) (163.77)%Repurchase Agreements: North America 140,248 $140,248 $140,248 17.78 %Europe 31,753 31,753 31,753 4.03 %Total 172,001 $172,001 $172,001 21.81 %Financial Derivatives–Assets: North America 1,401,261 $61,560 $80,029 10.15 %Europe — — — — %Total 1,401,261 $61,560 $80,029 10.15 %Financial Derivatives–Liabilities: North America (936,799) $(30,598) $(63,084) (8.00)%Europe (37,199) (2,957) (3,032) (0.39)%Total (973,998) $(33,555) $(66,116) (8.39)%

[4] 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 163.60%A/A/A 0.98%Baa/BBB/BBB 5.62%Ba/BB/BB or below 80.65%Unrated 24.61%

[5] At December 31, 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 100.30%, 53.97%, and 9.33% of equity, respectively.

[6] 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%

[7] 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 %

[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 $11.3 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.