Consolidated Condensed Schedule Of Investments (Long Investments) - USD ($) shares in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2015		Dec. 31, 2014
Schedule of Investments [Line Items]
Fair Value		$ 1,894,679,000		$ 2,172,082,000
Investment Owned, at Cost		$ 1,883,248,000		$ 2,122,326,000
Percentage collaterallized by GNRCMO certificates		100.00%		100.00%
Fair value of loans held in related party trust		$ 2,700,000
Non-performing loans, maturity date not applicable		6,300,000		$ 11,300,000
Mortgage Loans in Process of Foreclosure, Amount		$ 5,700,000
Unrated But Agency-Guaranteed [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity		168.31%		163.60%
Long Investment A Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity		0.33%		0.98%
Long Investment BBB Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity		1.64%		5.62%
Long Investment BB Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity		39.54%		80.65%
Long Investment Unrated Rating [Member]
Schedule of Investments [Line Items]
Long investment holdings as a percentage of stockholders' equity		40.03%		24.61%
Principal And Interest - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		154.68%	[1],[2],[3],[4]	147.82%	[5],[6],[7],[8],[9]
Fair Value		$ 1,172,980,000	[1],[3],[4]	$ 1,165,642,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 182,200,000	[1],[3],[4]	$ 176,029,000	[5],[7],[8],[9]
Rate		4.00%	[1],[3],[4]	4.00%	[5],[7],[8],[9]
Fair Value		$ 195,754,000	[1],[3],[4]	$ 188,912,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 4.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2042-09	[1],[3],[4]	2042-09	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 4.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2045-10	[1],[3],[4]	2045-01	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 175,990,000	[1],[3],[4]	$ 191,734,000	[5],[7],[8],[9]
Rate		4.00%	[1],[3],[4]	4.00%	[5],[7],[8],[9]
Fair Value		$ 189,452,000	[1],[3],[4]	$ 206,080,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 4.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2042-08	[1],[3],[4]	2042-04	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 4.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2045-10	[1],[3],[4]	2045-01	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 138,711,000	[1],[3],[4]	$ 171,291,000	[5],[7],[8],[9]
Rate		4.50%	[1],[3],[4]	4.50%	[5],[7],[8],[9]
Fair Value		$ 152,082,000	[1],[3],[4]	$ 187,748,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 4.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2041-10	[1],[3],[4]	2041-10	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 4.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2045-10	[1],[3],[4]	2045-01	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 96,297,000	[1],[3],[4]	$ 63,040,000	[5],[7],[8],[9]
Rate		3.50%	[1],[3],[4]	3.50%	[5],[7],[8],[9]
Fair Value		$ 100,859,000	[1],[3],[4]	$ 65,989,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 3.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2042-10	[1],[3],[4]	2042-10	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 3.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2045-10	[1],[3],[4]	2044-11	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 68,133,000	[1],[3],[4]	$ 71,332,000	[5],[7],[8],[9]
Rate		4.50%	[1],[3],[4]	4.50%	[5],[7],[8],[9]
Fair Value		$ 74,869,000	[1],[3],[4]	$ 78,285,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 4.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2043-09	[1],[3],[4]	2043-09	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 4.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2045-08	[1],[3],[4]	2044-12	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 5.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 58,365,000	[1],[3],[4]	$ 93,720,000	[5],[7],[8],[9]
Rate		5.00%	[1],[3],[4]	5.00%	[5],[7],[8],[9]
Fair Value		$ 64,851,000	[1],[3],[4]	$ 104,347,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 5.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2035-10	[1],[3],[4]	2035-10	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 5.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2044-12	[1],[3],[4]	2044-12	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 54,325,000	[1],[3],[4]	$ 84,478,000	[5],[7],[8],[9]
Rate		3.50%	[1],[3],[4]	3.50%	[5],[7],[8],[9]
Fair Value		$ 57,797,000	[1],[3],[4]	$ 89,707,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 3.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2028-03	[1],[3],[4]	2028-03	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 3.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2030-10	[1],[3],[4]	2029-12	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 52,023,000	[1],[3],[4]	$ 53,456,000	[5],[7],[8],[9]
Rate		3.50%	[1],[3],[4]	3.50%	[5],[7],[8],[9]
Fair Value		$ 54,456,000	[1],[3],[4]	$ 55,840,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 3.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2042-01	[1],[3],[4]	2042-01	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 3.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2045-08	[1],[3],[4]	2045-01	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 45,396,000
Rate	[1],[3],[4]	4.00%
Fair Value	[1],[3],[4]	$ 48,793,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 4.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2045-06
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 4.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2045-09
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 3.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 31,865,000
Rate	[1],[3],[4]	3.00%
Fair Value	[1],[3],[4]	$ 33,321,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 3.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2030-04
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 3.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2030-10
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (15 Year) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 22,214,000	[1],[3],[4]	$ 21,139,000	[5],[7],[8],[9]
Rate		3.50%	[1],[3],[4]	3.50%	[5],[7],[8],[9]
Fair Value		$ 23,620,000	[1],[3],[4]	$ 22,410,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (15 Year) 3.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2028-09	[1],[3],[4]	2028-09	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (15 Year) 3.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2030-09	[1],[3],[4]	2029-09	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 18,534,000
Rate	[1],[3],[4]	4.50%
Fair Value	[1],[3],[4]	$ 20,153,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 4.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2045-07
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 4.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2045-09
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 12,127,000	[1],[3],[4]	$ 14,283,000	[5],[7],[8],[9]
Rate		4.00%	[1],[3],[4]	4.00%	[5],[7],[8],[9]
Fair Value		$ 12,922,000	[1],[3],[4]	$ 15,211,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 4.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2026-06	[1],[3],[4]	2026-06	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 4.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2029-12	[1],[3],[4]	2029-12	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 12,024,000
Rate	[1],[3],[4]	3.50%
Fair Value	[1],[3],[4]	$ 12,600,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 3.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2045-04
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (30 Year) 3.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2045-06
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.56% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 8,230,000
Rate	[1],[3],[4]	4.56%
Maturity	[1],[3],[4]	2065-01
Fair Value	[1],[3],[4]	$ 9,217,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (Other) 5.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 8,032,000	[1],[3],[4]	$ 8,424,000	[5],[7],[8],[9]
Rate		5.00%	[1],[3],[4]	5.00%	[5],[7],[8],[9]
Fair Value		$ 9,038,000	[1],[3],[4]	$ 9,497,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (Other) 5.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2043-09	[1],[3],[4]	2043-09	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (Other) 5.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2044-01	[1],[3],[4]	2044-01	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (Other) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 8,288,000	[1],[3],[4]	$ 7,402,000	[5],[7],[8],[9]
Rate		3.50%	[1],[3],[4]	3.50%	[5],[7],[8],[9]
Fair Value		$ 8,671,000	[1],[3],[4]	$ 7,678,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (Other) 3.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2030-02	[1],[3],[4]	2043-04	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (Other) 3.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2043-06	[1],[3],[4]	2043-06	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.61% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 6,585,000	[1],[3],[4]	$ 6,883,000	[5],[7],[8],[9]
Rate		4.61%	[1],[3],[4]	4.61%	[5],[7],[8],[9]
Fair Value		$ 7,388,000	[1],[3],[4]	$ 7,738,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.61% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2064-06	[1],[3],[4]	2064-06	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.61% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2064-11	[1],[3],[4]	2064-11	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.59% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 6,114,000	[1],[3],[4]	$ 5,945,000	[5],[7],[8],[9]
Rate		4.59%	[1],[3],[4]	4.59%	[5],[7],[8],[9]
Maturity		2064-11	[1],[3],[4]	2064-11	[5],[7],[8],[9]
Fair Value		$ 6,851,000	[1],[3],[4]	$ 6,695,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (20 Year) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 6,284,000	[1],[3],[4]	$ 6,663,000	[5],[7],[8],[9]
Rate		4.00%	[1],[3],[4]	4.00%	[5],[7],[8],[9]
Fair Value		$ 6,796,000	[1],[3],[4]	$ 7,213,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (20 Year) 4.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2033-11	[1],[3],[4]	2033-11	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (20 Year) 4.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2033-12	[1],[3],[4]	2033-12	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 3.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 6,588,000	[1],[3],[4]	$ 20,140,000	[5],[7],[8],[9]
Rate		3.00%	[1],[3],[4]	3.00%	[5],[7],[8],[9]
Fair Value		$ 6,688,000	[1],[3],[4]	$ 20,425,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 3.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2043-01	[1],[3],[4]	2043-01	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 3.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2043-02	[1],[3],[4]	2043-05	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (15 Year) 3.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 6,060,000	[1],[3],[4]	$ 2,990,000	[5],[7],[8],[9]
Rate		3.00%	[1],[3],[4]	3.00%	[5],[7],[8],[9]
Maturity	[5],[7],[8],[9]			2028-03
Fair Value		$ 6,325,000	[1],[3],[4]	$ 3,114,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (15 Year) 3.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2028-03
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (15 Year) 3.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[1],[3],[4]	2030-04
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (Other) 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 5,196,000	[1],[3],[4]	$ 5,526,000	[5],[7],[8],[9]
Rate		4.50%	[1],[3],[4]	4.50%	[5],[7],[8],[9]
Maturity		2044-02	[1],[3],[4]	2044-02	[5],[7],[8],[9]
Fair Value		$ 5,753,000	[1],[3],[4]	$ 6,108,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 5.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 5,058,000	[1],[3],[4]	$ 5,131,000	[5],[7],[8],[9]
Rate		5.50%	[1],[3],[4]	5.50%	[5],[7],[8],[9]
Maturity		2039-10	[1],[3],[4]	2039-10	[5],[7],[8],[9]
Fair Value		$ 5,660,000	[1],[3],[4]	$ 5,741,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (15 Year) 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 4,938,000	[1],[3],[4]	$ 5,916,000	[5],[7],[8],[9]
Rate		4.50%	[1],[3],[4]	4.50%	[5],[7],[8],[9]
Maturity		2026-04	[1],[3],[4]	2026-04	[5],[7],[8],[9]
Fair Value		$ 5,337,000	[1],[3],[4]	$ 6,232,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.68% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 4,168,000	[1],[3],[4]	$ 4,131,000	[5],[7],[8],[9]
Rate		4.68%	[1],[3],[4]	4.68%	[5],[7],[8],[9]
Maturity		2064-09	[1],[3],[4]	2064-09	[5],[7],[8],[9]
Fair Value		$ 4,670,000	[1],[3],[4]	$ 4,647,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 3,796,000
Rate	[1],[3],[4]	4.50%
Maturity	[1],[3],[4]	2061-07
Fair Value	[1],[3],[4]	$ 4,171,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.75% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 3,910,000	[1],[3],[4]	$ 4,181,000	[5],[7],[8],[9]
Rate		4.75%	[1],[3],[4]	4.75%	[5],[7],[8],[9]
Maturity		2061-01	[1],[3],[4]	2061-01	[5],[7],[8],[9]
Fair Value		$ 4,097,000	[1],[3],[4]	$ 4,457,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.63% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 3,554,000	[1],[3],[4]	$ 3,809,000	[5],[7],[8],[9]
Rate		4.63%	[1],[3],[4]	4.63%	[5],[7],[8],[9]
Maturity		2064-10	[1],[3],[4]	2064-10	[5],[7],[8],[9]
Fair Value		$ 3,996,000	[1],[3],[4]	$ 4,295,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.80% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 3,480,000	[1],[3],[4]	$ 3,680,000	[5],[7],[8],[9]
Rate		4.80%	[1],[3],[4]	4.80%	[5],[7],[8],[9]
Maturity		2061-02	[1],[3],[4]	2061-02	[5],[7],[8],[9]
Fair Value		$ 3,663,000	[1],[3],[4]	$ 3,933,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.49% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 3,188,000	[1],[3],[4]	$ 3,300,000	[5],[7],[8],[9]
Rate		4.49%	[1],[3],[4]	4.49%	[5],[7],[8],[9]
Maturity		2064-11	[1],[3],[4]	2064-11	[5],[7],[8],[9]
Fair Value		$ 3,546,000	[1],[3],[4]	$ 3,698,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 5.49% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 3,130,000	[1],[3],[4]	$ 3,487,000	[5],[7],[8],[9]
Rate		5.49%	[1],[3],[4]	5.49%	[5],[7],[8],[9]
Maturity		2060-04	[1],[3],[4]	2060-04	[5],[7],[8],[9]
Fair Value		$ 3,380,000	[1],[3],[4]	$ 3,811,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (Other) 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,793,000	[1],[3],[4]	$ 2,836,000	[5],[7],[8],[9]
Rate		4.50%	[1],[3],[4]	4.50%	[5],[7],[8],[9]
Maturity		2044-05	[1],[3],[4]	2044-05	[5],[7],[8],[9]
Fair Value		$ 3,090,000	[1],[3],[4]	$ 3,131,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.64% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 2,650,000
Rate	[1],[3],[4]	4.64%
Maturity	[1],[3],[4]	2065-03
Fair Value	[1],[3],[4]	$ 2,983,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (Other) 3.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,837,000	[1],[3],[4]	$ 3,027,000	[5],[7],[8],[9]
Rate		3.00%	[1],[3],[4]	3.00%	[5],[7],[8],[9]
Maturity		2028-06	[1],[3],[4]	2028-06	[5],[7],[8],[9]
Fair Value		$ 2,957,000	[1],[3],[4]	$ 3,139,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 6.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,573,000	[1],[3],[4]	$ 2,794,000	[5],[7],[8],[9]
Rate		6.00%	[1],[3],[4]	6.00%	[5],[7],[8],[9]
Fair Value		$ 2,909,000	[1],[3],[4]	$ 3,164,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 6.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2039-09	[1],[3],[4]	2039-09	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (30 Year) 6.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2040-02	[1],[3],[4]	2040-02	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 5.54% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,619,000	[1],[3],[4]	$ 2,931,000	[5],[7],[8],[9]
Rate		5.54%	[1],[3],[4]	5.54%	[5],[7],[8],[9]
Maturity		2060-02	[1],[3],[4]	2060-02	[5],[7],[8],[9]
Fair Value		$ 2,794,000	[1],[3],[4]	$ 3,177,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 5.51% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,408,000	[1],[3],[4]	$ 2,668,000	[5],[7],[8],[9]
Rate		5.51%	[1],[3],[4]	5.51%	[5],[7],[8],[9]
Maturity		2060-02	[1],[3],[4]	2060-02	[5],[7],[8],[9]
Fair Value		$ 2,608,000	[1],[3],[4]	$ 2,919,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (15 Year) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,016,000	[1],[3],[4]	$ 2,561,000	[5],[7],[8],[9]
Rate		4.00%	[1],[3],[4]	4.00%	[5],[7],[8],[9]
Maturity		2029-02	[1],[3],[4]	2029-02	[5],[7],[8],[9]
Fair Value		$ 2,141,000	[1],[3],[4]	$ 2,728,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 6.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 1,720,000	[1],[3],[4]	$ 1,849,000	[5],[7],[8],[9]
Rate		6.00%	[1],[3],[4]	6.00%	[5],[7],[8],[9]
Fair Value		$ 1,935,000	[1],[3],[4]	$ 2,084,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 6.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2039-04	[1],[3],[4]	2039-04	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 6.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2040-05	[1],[3],[4]	2040-05	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (20 Year) 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 1,469,000	[1],[3],[4]	$ 1,510,000	[5],[7],[8],[9]
Rate		4.50%	[1],[3],[4]	4.50%	[5],[7],[8],[9]
Maturity		2033-12	[1],[3],[4]	2033-12	[5],[7],[8],[9]
Fair Value		$ 1,609,000	[1],[3],[4]	$ 1,652,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 3.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 1,146,000	[1],[3],[4]	$ 10,130,000	[5],[7],[8],[9]
Rate		3.00%	[1],[3],[4]	3.00%	[5],[7],[8],[9]
Maturity	[1],[3],[4]	2043-07
Fair Value		$ 1,160,000	[1],[3],[4]	$ 10,271,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 3.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[5],[7],[8],[9]			2043-01
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 3.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[5],[7],[8],[9]			2043-04
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 5.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 882,000	[1],[3],[4]	$ 1,298,000	[5],[7],[8],[9]
Rate		5.00%	[1],[3],[4]	5.00%	[5],[7],[8],[9]
Maturity		2044-07	[1],[3],[4]	2044-07	[5],[7],[8],[9]
Fair Value		$ 977,000	[1],[3],[4]	$ 1,444,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (30 Year) 5.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 733,000	[1],[3],[4]	$ 851,000	[5],[7],[8],[9]
Rate		5.50%	[1],[3],[4]	5.50%	[5],[7],[8],[9]
Maturity		2033-08	[1],[3],[4]	2033-08	[5],[7],[8],[9]
Fair Value		$ 814,000	[1],[3],[4]	$ 954,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association Pools (Other) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 218,000	[1],[3],[4]	$ 245,000	[5],[7],[8],[9]
Rate		4.00%	[1],[3],[4]	4.00%	[5],[7],[8],[9]
Maturity		2037-06	[1],[3],[4]	2037-06	[5],[7],[8],[9]
Fair Value		$ 227,000	[1],[3],[4]	$ 260,000	[5],[7],[8],[9]
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.66% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[5],[7],[8],[9]			$ 3,458,000
Rate	[5],[7],[8],[9]			4.66%
Maturity	[5],[7],[8],[9]			2063-01
Fair Value	[5],[7],[8],[9]			$ 3,792,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.67% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[5],[7],[8],[9]			$ 3,290,000
Rate	[5],[7],[8],[9]			4.67%
Maturity	[5],[7],[8],[9]			2061-10
Fair Value	[5],[7],[8],[9]			$ 3,551,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (Other) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[5],[7],[8],[9]			$ 2,238,000
Rate	[5],[7],[8],[9]			4.00%
Fair Value	[5],[7],[8],[9]			$ 2,398,000
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (Other) 4.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[5],[7],[8],[9]			2043-07
Principal And Interest - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools (Other) 4.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity	[5],[7],[8],[9]			2044-10
Principal And Interest - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Pools (Other) 4.65% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[5],[7],[8],[9]			$ 1,079,000
Rate	[5],[7],[8],[9]			4.65%
Maturity	[5],[7],[8],[9]			2061-11
Fair Value	[5],[7],[8],[9]			$ 1,167,000
Interest Only - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		1.14%	[1],[2],[3],[4]	1.20%	[5],[6],[7],[8],[9]
Fair Value		$ 8,664,000	[1],[3],[4]	$ 9,441,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 4.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 15,412,000	[1],[3],[4]	$ 30,581,000	[5],[7],[8],[9]
Rate		4.50%	[1],[3],[4]	4.50%	[5],[7],[8],[9]
Fair Value		$ 1,863,000	[1],[3],[4]	$ 3,946,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 4.50% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2020-12	[1],[3],[4]	2020-12	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 4.50% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2043-05	[1],[3],[4]	2043-06	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Government National Mortgage Association 5.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 9,318,000
Rate	[1],[3],[4]	5.50%
Maturity	[1],[3],[4]	2043-11
Fair Value	[1],[3],[4]	$ 1,670,000
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 5.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 12,654,000	[1],[3],[4]	$ 17,397,000	[5],[7],[8],[9]
Rate		5.00%	[1],[3],[4]	5.00%	[5],[7],[8],[9]
Fair Value		$ 1,540,000	[1],[3],[4]	$ 1,899,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 5.00% [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2036-01	[1],[3],[4]	2036-01	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 5.00% [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2040-05	[1],[3],[4]	2040-05	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 6,195,000	[1],[3],[4]	$ 6,935,000	[5],[7],[8],[9]
Rate		3.50%	[1],[3],[4]	3.50%	[5],[7],[8],[9]
Maturity		2032-12	[1],[3],[4]	2032-12	[5],[7],[8],[9]
Fair Value		$ 893,000	[1],[3],[4]	$ 1,001,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation 5.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 5,465,000	[1],[3],[4]	$ 7,621,000	[5],[7],[8],[9]
Rate		5.00%	[1],[3],[4]	5.00%	[5],[7],[8],[9]
Maturity		2040-03	[1],[3],[4]	2040-03	[5],[7],[8],[9]
Fair Value		$ 582,000	[1],[3],[4]	$ 815,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 3.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 4,101,000	[1],[3],[4]	$ 4,691,000	[5],[7],[8],[9]
Rate		3.00%	[1],[3],[4]	3.00%	[5],[7],[8],[9]
Maturity		2041-09	[1],[3],[4]	2041-09	[5],[7],[8],[9]
Fair Value		$ 437,000	[1],[3],[4]	$ 554,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Government National Mortgage Association 4.75% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,142,000	[1],[3],[4]	$ 2,142,000	[5],[7],[8],[9]
Rate		4.75%	[1],[3],[4]	4.75%	[5],[7],[8],[9]
Maturity		2040-07	[1],[3],[4]	2040-07	[5],[7],[8],[9]
Fair Value		$ 385,000	[1],[3],[4]	$ 461,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Government National Mortgage Association 6.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 1,759,000
Rate	[1],[3],[4]	6.00%
Maturity	[1],[3],[4]	2038-06
Fair Value	[1],[3],[4]	$ 347,000
Interest Only - Fixed Rate Agency Securities [Member] | Government National Mortgage Association Five Percent [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 4,175,000
Rate	[1],[3],[4]	5.00%
Maturity	[1],[3],[4]	2037-05
Fair Value	[1],[3],[4]	$ 331,000
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 5.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 1,778,000	[1],[3],[4]	$ 2,242,000	[5],[7],[8],[9]
Rate		5.50%	[1],[3],[4]	5.50%	[5],[7],[8],[9]
Maturity		2040-10	[1],[3],[4]	2040-10	[5],[7],[8],[9]
Fair Value		$ 250,000	[1],[3],[4]	$ 285,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 1,428,000	[1],[3],[4]	$ 1,826,000	[5],[7],[8],[9]
Rate		4.00%	[1],[3],[4]	4.00%	[5],[7],[8],[9]
Maturity		2039-05	[1],[3],[4]	2039-05	[5],[7],[8],[9]
Fair Value		$ 228,000	[1],[3],[4]	$ 287,000	[5],[7],[8],[9]
Interest Only - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation 5.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 1,212,000	[1],[3],[4]	$ 1,609,000	[5],[7],[8],[9]
Rate		5.50%	[1],[3],[4]	5.50%	[5],[7],[8],[9]
Maturity		2039-01	[1],[3],[4]	2039-01	[5],[7],[8],[9]
Fair Value		$ 138,000	[1],[3],[4]	$ 193,000	[5],[7],[8],[9]
TBA - Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		7.27%	[1],[2],[3],[4]	9.18%	[5],[6],[7],[8],[9]
Current Principal/Notional Amount		$ 53,868,000		$ 71,598,000
Fair Value		55,116,000	[1],[3],[4]	72,410,000	[5],[7],[8],[9]
TBA - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation (30 Year) 3.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 34,240,000
Rate	[1],[3],[4]	3.00%
Maturity	[1],[3],[4]	2015-10
Fair Value	[1],[3],[4]	$ 34,585,000
TBA - Fixed Rate Agency Securities [Member] | Government National Mortgage Association (30 Year) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 13,450,000
Rate	[1],[3],[4]	3.50%
Maturity	[1],[3],[4]	2015-10
Fair Value	[1],[3],[4]	$ 14,091,000
TBA - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation (30 Year) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 4,320,000
Rate	[1],[3],[4]	3.50%
Maturity	[1],[3],[4]	2015-10
Fair Value	[1],[3],[4]	$ 4,494,000
TBA - Fixed Rate Agency Securities [Member] | Government National Mortgage Association (30 Year) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 1,200,000
Rate	[1],[3],[4]	4.00%
Maturity	[1],[3],[4]	2015-10
Fair Value	[1],[3],[4]	$ 1,279,000
TBA - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association (30 Year) 3.00% [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[1],[3],[4]	$ 658,000
Rate	[1],[3],[4]	3.00%
Maturity	[1],[3],[4]	2015-10
Fair Value	[1],[3],[4]	$ 667,000
TBA - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association (30 Year) [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[5],[7],[8],[9]			$ 44,478,000
Rate	[5],[7],[8],[9]			3.00%
Maturity	[5],[7],[8],[9]			2015-01
Fair Value	[5],[7],[8],[9]			$ 45,015,000
TBA - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation (30 Year) [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[5],[7],[8],[9]			$ 27,120,000
Rate	[5],[7],[8],[9]			3.00%
Maturity	[5],[7],[8],[9]			2015-01
Fair Value	[5],[7],[8],[9]			$ 27,395,000
Fixed Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		163.09%	[1],[2],[3],[4]	158.20%	[5],[6],[7],[8],[9]
Fair Value		$ 1,236,760,000	[1],[3],[4]	$ 1,247,493,000	[5],[7],[8],[9]
Investment Owned, at Cost		$ 1,224,138,000	[1],[3],[4]	$ 1,230,414,000	[5],[7],[8],[9]
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]	2.62%	[5],[6],[7],[8],[9]
Fair Value		$ 19,864,000	[1],[3],[4]	$ 20,647,000	[5],[7],[8],[9]
Principal And Interest - Floating Rate Agency Securities [Member] | Federal National Mortgage Association Pools [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		8,485,000	[1],[3],[4]	6,265,000	[5],[7],[8],[9]
Fair Value		$ 8,993,000	[1],[3],[4]	$ 6,692,000	[5],[7],[8],[9]
Principal And Interest - Floating Rate Agency Securities [Member] | Federal National Mortgage Association Pools [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		2.75%	[1],[3],[4]	5.04%	[5],[7],[8],[9]
Maturity		2035-09	[1],[3],[4]	2035-09	[5],[7],[8],[9]
Principal And Interest - Floating Rate Agency Securities [Member] | Federal National Mortgage Association Pools [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		6.05%	[1],[3],[4]	6.05%	[5],[7],[8],[9]
Maturity		2045-05	[1],[3],[4]	2037-09	[5],[7],[8],[9]
Principal And Interest - Floating Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 7,747,000	[1],[3],[4]	$ 9,737,000	[5],[7],[8],[9]
Fair Value		$ 8,233,000	[1],[3],[4]	$ 10,282,000	[5],[7],[8],[9]
Principal And Interest - Floating Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		2.61%	[1],[3],[4]	2.36%	[5],[7],[8],[9]
Maturity		2037-06	[1],[3],[4]	2037-06	[5],[7],[8],[9]
Principal And Interest - Floating Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		5.94%	[1],[3],[4]	5.94%	[5],[7],[8],[9]
Maturity		2044-05	[1],[3],[4]	2044-05	[5],[7],[8],[9]
Principal And Interest - Floating Rate Agency Securities [Member] | Government National Mortgage Association Pools [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,449,000	[1],[3],[4]	$ 3,404,000	[5],[7],[8],[9]
Rate		2.55%	[1],[3],[4]	2.47%	[5],[7],[8],[9]
Maturity		2064-11	[1],[3],[4]	2064-11	[5],[7],[8],[9]
Fair Value		$ 2,638,000	[1],[3],[4]	$ 3,673,000	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		2.60%	[1],[2],[3],[4]	2.78%	[5],[6],[7],[8],[9]
Fair Value		$ 19,691,000	[1],[3],[4]	$ 21,944,000	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Government National Mortgage Association [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		208,573,000	[1],[3],[4]	183,794,000	[5],[7],[8],[9]
Fair Value		$ 13,554,000	[1],[3],[4]	$ 13,591,000	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Government National Mortgage Association [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		0.40%	[1],[3],[4]	0.40%	[5],[7],[8],[9]
Maturity		2042-11	[1],[3],[4]	2042-11	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Government National Mortgage Association [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		6.53%	[1],[3],[4]	6.58%	[5],[7],[8],[9]
Maturity		2063-10	[1],[3],[4]	2063-10	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 6,915,000	[1],[3],[4]	$ 13,048,000	[5],[7],[8],[9]
Fair Value		$ 1,232,000	[1],[3],[4]	$ 1,872,000	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		5.79%	[1],[3],[4]	5.84%	[5],[7],[8],[9]
Maturity		2036-03	[1],[3],[4]	2036-03	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		6.42%	[1],[3],[4]	6.47%	[5],[7],[8],[9]
Maturity		2039-08	[1],[3],[4]	2039-08	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Federal National Mortgage Association [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 19,783,000	[1],[3],[4]	$ 28,251,000	[5],[7],[8],[9]
Fair Value		$ 3,131,000	[1],[3],[4]	$ 4,508,000	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Federal National Mortgage Association [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		5.50%	[1],[3],[4]	5.50%	[5],[7],[8],[9]
Maturity		2063-06	[1],[3],[4]	2035-04	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Federal National Mortgage Association [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		7.36%	[1],[3],[4]	6.58%	[5],[7],[8],[9]
Maturity		2041-12	[1],[3],[4]	2043-07	[5],[7],[8],[9]
Interest Only - Floating Rate Agency Securities [Member] | Resecuritization of Government National Mortgage Association [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 21,228,000	[1],[3],[4],[10]	$ 21,145,000	[5],[7],[8],[9],[11]
Rate		4.31%	[1],[3],[4],[10]	4.34%	[5],[7],[8],[9],[11]
Maturity		2060-08	[1],[3],[4],[10]	2060-08	[5],[7],[8],[9],[11]
Fair Value		$ 1,774,000	[1],[3],[4],[10]	$ 1,973,000	[5],[7],[8],[9],[11]
Floating Rate Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		5.22%	[1],[2],[3],[4]	5.40%	[5],[6],[7],[8],[9]
Fair Value		$ 39,555,000	[1],[3],[4]	$ 42,591,000	[5],[7],[8],[9]
Investment Owned, at Cost		$ 38,247,000	[1],[3],[4]	$ 41,787,000	[5],[7],[8],[9]
Agency Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		168.31%	[1],[2],[3],[4]	163.60%	[5],[6],[7],[8],[9]
Fair Value		$ 1,276,315,000	[1],[3],[4]	$ 1,290,084,000	[5],[7],[8],[9]
Investment Owned, at Cost		$ 1,262,385,000	[1],[3],[4]	$ 1,272,201,000	[5],[7],[8],[9]
Principal And Interest - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		44.84%	[2],[3],[4]	76.95%	[6],[7],[8],[9]
Fair Value		$ 340,031,000	[3],[4]	$ 606,757,000	[7],[8],[9]
Investment Owned, at Cost		$ 330,235,000	[3],[4]	$ 571,834,000	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		38.48%	[2],[3],[4]	71.67%	[6],[7],[8],[9]
Fair Value		$ 291,773,000	[3],[4]	$ 565,117,000	[7],[8],[9]
Investment Owned, at Cost		$ 276,610,000	[3],[4]	$ 526,764,000	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Europe [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		6.36%	[2],[3],[4]	5.28%	[6],[7],[8],[9]
Fair Value		$ 48,258,000	[3],[4]	$ 41,640,000	[7],[8],[9]
Investment Owned, at Cost		53,625,000	[3],[4]	45,070,000	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		114,942,000	[3],[4]	117,877,000	[7],[8],[9]
Fair Value		30,339,000	[3],[4]	39,240,000	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Commercial [Member] | Europe [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		14,932,000	[3],[4]	12,784,000	[7],[8],[9]
Fair Value		10,276,000	[3],[4]	12,837,000	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		438,643,000	[3],[4]	799,083,000	[7],[8],[9]
Fair Value		261,434,000	[3],[4]	525,877,000	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Residential [Member] | Europe [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		40,938,000	[3],[4]	33,294,000	[7],[8],[9]
Fair Value		$ 37,982,000	[3],[4]	$ 28,803,000	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		3.00%	[3],[4]	3.00%	[7],[8],[9]
Maturity		2045-07	[3],[4]	2045-07	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Commercial [Member] | Europe [Member]
Schedule of Investments [Line Items]
Rate		0.00%	[3],[4]	0.00%	[7],[8],[9]
Maturity		2015-10	[3],[4]	2015-07	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		0.00%	[3],[4]	0.00%	[7],[8],[9]
Maturity		2019-05	[3],[4]	2019-05	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Residential [Member] | Europe [Member]
Schedule of Investments [Line Items]
Rate		0.00%	[3],[4]	0.34%	[7],[8],[9]
Maturity		2025-06	[3],[4]	2038-08	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		4.56%	[3],[4]	5.40%	[7],[8],[9]
Maturity		2048-02	[3],[4]	2049-12	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Commercial [Member] | Europe [Member]
Schedule of Investments [Line Items]
Rate		11.00%	[3],[4]	12.25%	[7],[8],[9]
Maturity		2019-06	[3],[4]	2024-03	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		9.35%	[3],[4]	9.35%	[7],[8],[9]
Maturity		2046-09	[3],[4]	2047-07	[7],[8],[9]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Residential [Member] | Europe [Member]
Schedule of Investments [Line Items]
Rate		5.33%	[3],[4]	4.41%	[7],[8],[9]
Maturity		2050-03	[3],[4]	2061-01	[7],[8],[9]
Principal Only - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		0.45%	[2],[3],[4]	0.41%	[6],[7],[8],[9]
Fair Value		$ 3,438,000	[3],[4]	$ 3,248,000	[7],[8],[9]
Investment Owned, at Cost		2,950,000	[3],[4]	2,737,000	[7],[8],[9]
Principal Only - Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 5,800,000	[3],[4]	$ 5,800,000	[7],[8],[9]
Rate		0.00%	[3],[4]	0.00%	[7],[8],[9]
Maturity		2030-08	[3],[4]	2030-08	[7],[8],[9]
Fair Value		$ 3,438,000	[3],[4]	$ 3,248,000	[7],[8],[9]
Interest Only - Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		0.40%	[2],[3],[4]	0.31%	[6],[7],[8],[9]
Fair Value		$ 3,029,000	[3],[4]	$ 2,423,000	[7],[8],[9]
Investment Owned, at Cost		2,136,000	[3],[4]	1,602,000	[7],[8],[9]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		27,254,000	[3],[4]	17,666,000	[7],[8],[9]
Fair Value		1,900,000	[3],[4]	1,234,000	[7],[8],[9]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		42,536,000	[3],[4]	47,557,000	[7],[8],[9]
Fair Value		$ 1,129,000	[3],[4]	$ 1,189,000	[7],[8],[9]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		1.57%	[3],[4]	1.42%	[7],[8],[9]
Maturity		2047-10	[3],[4]	2047-10	[7],[8],[9]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		0.50%	[3],[4]	0.50%	[7],[8],[9]
Maturity		2044-06	[3],[4]	2044-06	[7],[8],[9]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		1.60%	[3],[4]	1.45%	[7],[8],[9]
Maturity		2048-02	[3],[4]	2047-12	[7],[8],[9]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		2.00%	[3],[4]	2.00%	[7],[8],[9]
Maturity		2047-09	[3],[4]	2047-09	[7],[8],[9]
Other Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		0.00%	[2],[3],[4]	0.00%	[6],[7],[8],[9]
Fair Value		$ 0	[3],[4]	$ 0	[7],[8],[9]
Investment Owned, at Cost		283,000	[3],[4]	302,000	[7],[8],[9]
Other Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 0	[3],[4]	$ 0	[7],[8],[9]
Rate		0.00%	[3],[4]	0.00%	[7],[8],[9]
Fair Value		$ 0	[3],[4]	$ 0	[7],[8],[9]
Other Private Label Securities [Member] | Various Issuer [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 104,463,000	[3],[4]	$ 111,629,000	[7],[8],[9]
Rate		0.00%	[3],[4]	0.00%	[7],[8],[9]
Maturity		2037-06	[3],[4]	2037-06	[7],[8],[9]
Fair Value		$ 0	[3],[4]	$ 0	[7],[8],[9]
Other Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2045-07	[3],[4]	2045-07	[7],[8],[9]
Other Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Maturity		2048-02	[3],[4]	2047-10	[7],[8],[9]
Private Label Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		45.69%	[2],[3],[4]	77.67%	[6],[7],[8],[9]
Fair Value		$ 346,498,000	[3],[4]	$ 612,428,000	[7],[8],[9]
Investment Owned, at Cost		$ 335,604,000	[3],[4]	$ 576,475,000	[7],[8],[9]
Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		214.00%	[2],[3],[4]	241.27%	[6],[7],[8],[9]
Fair Value		$ 1,622,813,000	[3],[4]	$ 1,902,512,000	[7],[8],[9]
Investment Owned, at Cost		$ 1,597,989,000	[3],[4]	$ 1,848,676,000	[7],[8],[9]
Collateralized Loan Obligations [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		7.49%	[2],[3],[4]	15.47%	[6],[7],[8],[9]
Fair Value		$ 56,803,000	[3],[4]	$ 121,994,000	[7],[8],[9]
Investment Owned, at Cost		$ 63,498,000	[3],[4]	$ 124,562,000	[7],[8],[9]
Collateralized Loan Obligations [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		3.96%	[2],[3],[4]	13.05%	[6],[7],[8],[9]
Fair Value		$ 29,997,000	[3],[4]	$ 102,883,000	[7],[8],[9]
Investment Owned, at Cost		$ 36,248,000	[3],[4]	$ 104,547,000	[7],[8],[9]
Collateralized Loan Obligations [Member] | Europe [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		3.53%	[2],[3],[4]	2.42%	[6],[7],[8],[9]
Fair Value		$ 26,806,000	[3],[4]	$ 19,111,000	[7],[8],[9]
Investment Owned, at Cost		27,250,000	[3],[4]	20,015,000	[7],[8],[9]
Collateralized Loan Obligations [Member] | Various Issuer [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		65,573,000	[3],[4]	128,188,000	[7],[8],[9]
Fair Value		29,997,000	[3],[4]	102,883,000	[7],[8],[9]
Collateralized Loan Obligations [Member] | Various Issuer [Member] | Europe [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		39,195,000	[3],[4]	19,786,000	[7],[8],[9]
Fair Value		$ 26,806,000	[3],[4]	$ 19,111,000	[7],[8],[9]
Collateralized Loan Obligations [Member] | Various Issuer [Member] | Minimum [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		0.00%	[3],[4]	0.00%	[7],[8],[9]
Maturity		2016-05	[3],[4]	2017-02	[7],[8],[9]
Collateralized Loan Obligations [Member] | Various Issuer [Member] | Minimum [Member] | Europe [Member]
Schedule of Investments [Line Items]
Rate		0.00%	[3],[4]	1.73%	[7],[8],[9]
Maturity		2022-01	[3],[4]	2017-03	[7],[8],[9]
Collateralized Loan Obligations [Member] | Various Issuer [Member] | Maximum [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		9.15%	[3],[4]	9.73%	[7],[8],[9]
Maturity		2068-09	[3],[4]	2068-09	[7],[8],[9]
Collateralized Loan Obligations [Member] | Various Issuer [Member] | Maximum [Member] | Europe [Member]
Schedule of Investments [Line Items]
Rate		4.48%	[3],[4]	4.00%	[7],[8],[9]
Maturity		2056-12	[3],[4]	2023-03	[7],[8],[9]
Consumer loans and asset-backed securities backed by consumer loans [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		10.25%	[2],[3],[4],[12]	3.08%	[6],[7],[8],[9],[13]
Fair Value		$ 77,701,000	[3],[4],[12]	$ 24,294,000	[7],[8],[9],[13]
Investment Owned, at Cost		$ 77,281,000	[3],[4],[12]	$ 24,824,000	[7],[8],[9],[13]
Consumer loans and asset-backed securities backed by consumer loans [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		9.86%	[2],[3],[4],[12]	2.59%	[6],[7],[8],[9],[13]
Fair Value		$ 74,744,000	[3],[4],[12]	$ 20,434,000	[7],[8],[9],[13]
Investment Owned, at Cost		$ 74,116,000	[3],[4],[12]	$ 20,549,000	[7],[8],[9],[13]
Consumer loans and asset-backed securities backed by consumer loans [Member] | Europe [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		0.39%	[2],[3],[4],[12]	0.49%	[6],[7],[8],[9],[13]
Fair Value		$ 2,957,000	[3],[4],[12]	$ 3,860,000	[7],[8],[9],[13]
Investment Owned, at Cost		3,165,000	[3],[4],[12]	4,275,000	[7],[8],[9],[13]
Consumer loans and asset-backed securities backed by consumer loans [Member] | Various Issuer [Member] | Consumer [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		71,921,000	[3],[4],[12],[14]	17,624,000	[7],[8],[9],[13]
Fair Value		74,744,000	[3],[4],[12],[14]	20,434,000	[7],[8],[9],[13]
Consumer loans and asset-backed securities backed by consumer loans [Member] | Various Issuer [Member] | Consumer [Member] | Europe [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,582,000	[3],[4],[12]	$ 3,860,000	[7],[8],[9],[13]
Rate		0.00%	[3],[4],[12]	0.00%	[7],[8],[9],[13]
Maturity		2024-08	[3],[4],[12]	2024-08	[7],[8],[9],[13]
Fair Value		$ 2,957,000	[3],[4],[12]	$ 3,860,000	[7],[8],[9],[13]
Consumer loans and asset-backed securities backed by consumer loans [Member] | Various Issuer [Member] | Minimum [Member] | Consumer [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		5.50%	[3],[4],[12],[14]	0.00%	[7],[8],[9],[13]
Maturity		2015-10	[3],[4],[12],[14]	2015-06	[7],[8],[9],[13]
Consumer loans and asset-backed securities backed by consumer loans [Member] | Various Issuer [Member] | Maximum [Member] | Consumer [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		49.00%	[3],[4],[12],[14]	49.00%	[7],[8],[9],[13]
Maturity		2020-09	[3],[4],[12],[14]	2019-07	[7],[8],[9],[13]
Corporate Debt [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		3.72%	[2],[3],[4]	5.41%	[6],[7],[8],[9]
Fair Value		$ 28,247,000	[3],[4]	$ 42,708,000	[7],[8],[9]
Investment Owned, at Cost		$ 34,724,000	[3],[4]	43,585,000	[7],[8],[9]
Corporate Debt [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	[2],[3],[4]	2.22%
Fair Value	[3],[4]	$ 16,882,000
Investment Owned, at Cost	[3],[4]	$ 22,690,000
Corporate Debt [Member] | Europe [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	[2],[3],[4]	1.50%
Fair Value	[3],[4]	$ 11,365,000
Investment Owned, at Cost	[3],[4]	12,034,000
Corporate Debt [Member] | Various Issuer [Member] | Basic Materials [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 5,720,000	[3],[4]	$ 5,440,000	[7],[8],[9]
Rate		11.75%	[3],[4]	9.00%	[7],[8],[9]
Maturity		2019-01	[3],[4]	2019-11	[7],[8],[9]
Fair Value		$ 1,165,000	[3],[4]	$ 5,114,000	[7],[8],[9]
Corporate Debt [Member] | Various Issuer [Member] | Communications [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[7],[8],[9]			15,255,000
Fair Value	[7],[8],[9]			14,671,000
Corporate Debt [Member] | Various Issuer [Member] | Communications [Member] | Europe [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[3],[4]	$ 8,155,000
Rate	[3],[4]	14.00%
Maturity	[3],[4]	2018-10
Fair Value	[3],[4]	$ 8,889,000
Corporate Debt [Member] | Various Issuer [Member] | Consumer [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 2,933,000	[3],[4]	6,543,000	[7],[8],[9]
Maturity	[3],[4]	2020-07
Fair Value		$ 1,690,000	[3],[4]	5,867,000	[7],[8],[9]
Corporate Debt [Member] | Various Issuer [Member] | Consumer [Member] | Europe [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[3],[4]	$ 16,218,000
Rate	[3],[4]	7.50%
Maturity	[3],[4]	2016-12
Fair Value	[3],[4]	$ 553,000
Corporate Debt [Member] | Various Issuer [Member] | Diversified [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[7],[8],[9]			$ 2,793,000
Rate	[7],[8],[9]			7.50%
Maturity	[7],[8],[9]			2020-05
Fair Value	[7],[8],[9]			$ 2,779,000
Corporate Debt [Member] | Various Issuer [Member] | Energy [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		16,026,000	[3],[4]	7,475,000	[7],[8],[9]
Fair Value		3,627,000	[3],[4]	5,877,000	[7],[8],[9]
Corporate Debt [Member] | Various Issuer [Member] | Energy [Member] | Europe [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[3],[4]	$ 2,800,000
Rate	[3],[4]	12.25%
Maturity	[3],[4]	2017-01
Fair Value	[3],[4]	$ 1,923,000
Corporate Debt [Member] | Various Issuer [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		$ 10,500,000	[3],[4]	$ 8,500,000	[7],[8],[9]
Rate		15.00%	[3],[4]	15.00%	[7],[8],[9]
Maturity		2019-10	[3],[4]	2019-10	[7],[8],[9]
Fair Value		$ 10,400,000	[3],[4]	$ 8,400,000	[7],[8],[9]
Corporate Debt [Member] | Various Issuer [Member] | Minimum [Member] | Communications [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate	[7],[8],[9]			7.75%
Maturity	[7],[8],[9]			2016-12
Corporate Debt [Member] | Various Issuer [Member] | Minimum [Member] | Consumer [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		4.83%	[3],[4]	5.25%	[7],[8],[9]
Maturity	[7],[8],[9]			2016-06
Corporate Debt [Member] | Various Issuer [Member] | Minimum [Member] | Energy [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		4.33%	[3],[4]	7.00%	[7],[8],[9]
Maturity		2018-09	[3],[4]	2017-01	[7],[8],[9]
Corporate Debt [Member] | Various Issuer [Member] | Maximum [Member] | Communications [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate	[7],[8],[9]			14.00%
Maturity	[7],[8],[9]			2019-06
Corporate Debt [Member] | Various Issuer [Member] | Maximum [Member] | Consumer [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		7.83%	[3],[4]	11.50%	[7],[8],[9]
Maturity	[7],[8],[9]			2021-09
Corporate Debt [Member] | Various Issuer [Member] | Maximum [Member] | Energy [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		11.25%	[3],[4]	12.25%	[7],[8],[9]
Maturity		2021-04	[3],[4]	2019-06	[7],[8],[9]
Mortgage Loans [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		9.53%	[2],[3],[4],[12]	7.08%	[6],[7],[8],[9],[13]
Fair Value		$ 72,279,000	[3],[4],[12]	$ 55,791,000	[7],[8],[9],[13]
Investment Owned, at Cost		73,044,000	[3],[4],[12]	55,664,000	[7],[8],[9],[13]
Mortgage Loans [Member] | Various Issuer [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		60,519,000	[3],[4],[12],[15]	32,519,000	[7],[8],[9],[13],[16]
Fair Value		54,620,000	[3],[4],[12],[15]	28,309,000	[7],[8],[9],[13],[16]
Mortgage Loans [Member] | Various Issuer [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		25,979,000	[3],[4],[12],[17]	$ 44,336,000	[7],[8],[9],[13]
Rate	[7],[8],[9],[13]			0.00%
Fair Value		$ 17,659,000	[3],[4],[12],[17]	$ 27,482,000	[7],[8],[9],[13]
Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		2.50%	[3],[4],[12],[15]	0.00%	[7],[8],[9],[13],[16]
Maturity		2015-11	[3],[4],[12],[15]	2015-01	[7],[8],[9],[13],[16]
Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate	[3],[4],[12],[17]	1.00%
Maturity		2021-07	[3],[4],[12],[17]	2018-02	[7],[8],[9],[13]
Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate		12.00%	[3],[4],[12],[15]	10.00%	[7],[8],[9],[13],[16]
Maturity		2045-07	[3],[4],[12],[15]	2017-11	[7],[8],[9],[13],[16]
Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Rate	[3],[4],[12],[17]	13.50%
Maturity		2055-09	[3],[4],[12],[17]	2054-10	[7],[8],[9],[13]
Real Estate Owned [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		1.96%	[2],[3],[4],[12],[18]	1.10%	[6],[7],[8],[9],[13],[19]
Fair Value		$ 14,830,000	[3],[4],[12],[18]	$ 8,635,000	[7],[8],[9],[13],[19]
Investment Owned, at Cost		14,714,000	[3],[4],[12],[18]	8,748,000	[7],[8],[9],[13],[19]
Real Estate Owned [Member] | Single-Family Houses [Member] | Real estate-related [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		43	[3],[4],[12],[18]	50	[7],[8],[9],[13],[19]
Fair Value		7,061,000	[3],[4],[12],[18]	6,591,000	[7],[8],[9],[13],[19]
Real Estate Owned [Member] | Commercial Property [Member] | Real estate-related [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount		2	[3],[4],[12],[18]	1	[7],[8],[9],[13],[19]
Fair Value		$ 7,769,000	[3],[4],[12],[18]	$ 2,044,000	[7],[8],[9],[13],[19]
Private Corporate Equity Investments [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		2.90%	[2],[3],[4]	1.84%	[6],[7],[8],[9]
Fair Value		$ 22,006,000	[3],[4]	$ 14,512,000	[7],[8],[9]
Investment Owned, at Cost		$ 21,998,000	[3],[4]	14,717,000	[7],[8],[9]
Private Corporate Equity Investments [Member] | North America [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	[2],[3],[4]	2.90%
Fair Value	[3],[4]	$ 22,006,000
Investment Owned, at Cost	[3],[4]	$ 21,998,000
Private Corporate Equity Investments [Member] | Europe [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	[2],[3],[4]	0.00%
Fair Value	[3],[4]	$ 0
Private Corporate Equity Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Commercial Mortgage-related Private Partnership | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Fair Value		$ 7,991,000	[3],[4]	$ 6,241,000	[7],[8],[9]
Investment Owned, Balance, Shares		8,171	[3],[4]	6,241	[7],[8],[9]
Private Corporate Equity Investments [Member] | Non-Exchange Traded Corporate Equity [Member] | Consumer [Member] | North America [Member]
Schedule of Investments [Line Items]
Fair Value		$ 2,726,000	[3],[4]	$ 2,090,000	[7],[8],[9]
Investment Owned, Balance, Shares		1,578	[3],[4]	32	[7],[8],[9]
Private Corporate Equity Investments [Member] | Non-Exchange Traded Corporate Equity [Member] | Consumer [Member] | Europe [Member]
Schedule of Investments [Line Items]
Fair Value	[3],[4]	$ 0
Investment Owned, Balance, Shares	[3],[4]	125
Private Corporate Equity Investments [Member] | Non-Exchange Traded Corporate Equity [Member] | Diversified [Member] | North America [Member]
Schedule of Investments [Line Items]
Fair Value		$ 2,403,000	[3],[4]	$ 770,000	[7],[8],[9]
Investment Owned, Balance, Shares		160	[3],[4]	56	[7],[8],[9]
Private Corporate Equity Investments [Member] | Non-Exchange Traded Corporate Equity [Member] | Technology [Member] | North America [Member]
Schedule of Investments [Line Items]
Fair Value	[3],[4]	$ 822,000
Investment Owned, Balance, Shares	[3],[4]	99
Private Corporate Equity Investments [Member] | Non-controlling Interest in Mortgage-related Private Partnership [Member] | Mortgage-related Commercial [Member] | North America [Member]
Schedule of Investments [Line Items]
Fair Value		$ 2,826,000	[3],[4]	$ 2,673,000	[7],[8],[9]
Private Corporate Equity Investments [Member] | Non-Exchange Traded Preferred Equity Investment in Mortgage Originators [Member] | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Fair Value		$ 4,325,000	[3],[4]	$ 2,500,000	[7],[8],[9]
Investment Owned, Balance, Shares		9,482	[3],[4]	7,657	[7],[8],[9]
Private Corporate Equity Investments [Member] | Non-Exchange Traded Equity Investment in Mortgage Originator | Mortgage-related Residential [Member] | North America [Member]
Schedule of Investments [Line Items]
Fair Value		$ 913,000	[3],[4]	$ 238,000	[7],[8],[9]
Investment Owned, Balance, Shares		7,478	[3],[4]	728	[7],[8],[9]
US Treasury Securities [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity	[6],[7],[8],[9]			0.21%
Fair Value	[7],[8],[9]			$ 1,636,000
Investment Owned, at Cost	[7],[8],[9]			1,550,000
US Treasury Securities [Member] | US Treasury Bond Securities [Member] | Government [Member] | North America [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[7],[8],[9]			$ 1,560,000
Rate	[7],[8],[9]			3.00%
Maturity	[7],[8],[9]			2044-11
Fair Value	[7],[8],[9]			$ 1,636,000
Long Investments [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		249.85%	[2],[3],[4]	275.46%	[6],[7],[8],[9]
Fair Value		$ 1,894,679,000	[3],[4]	$ 2,172,082,000	[7],[8],[9]
Investment Owned, at Cost		$ 1,883,248,000	[3],[4]	$ 2,122,326,000	[7],[8],[9]
Long Investments [Member] | Government National Mortgage Association [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		23.34%		9.33%
Long Investments [Member] | Federal Home Loan Mortgage Corporation [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		56.51%		53.97%
Long Investments [Member] | Federal National Mortgage Association [Member]
Schedule of Investments [Line Items]
Investment owned as a percentage of equity		88.46%		100.30%

[1] At September 30, 2015, 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 88.46%, 56.51%, and 23.34% of equity, respectively.

[2] Classification percentages are based on Total Equity.

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

[4] 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 168.31%A/A/A 0.33%Baa/BBB/BBB 1.64%Ba/BB/BB or below 39.54%Unrated 40.03%

[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] Classification percentages are based on Total Equity.

[7] Conformed to current period presentation.

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

[9] 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%

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

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

[12] Loans and real estate owned are beneficially owned by the Company through participation certificates in the various trusts that hold such investments.

[13] Loans and real estate owned are beneficially owned by the Company through participation certificates in the various trusts that hold such investments.

[14] Includes investments in participation certificates in a trust owned by a related party of Ellington Financial Management LLC for which the Company has beneficial interests in the residual cash flows of the underlying loans held by the trust. At September 30, 2015 loans held in the related party trust for which the Company has beneficial interests in the residual cash flows, totaled $2.7 million.

[15] Includes non-performing commercial loans in the amount of $6.3 million whereby principal and/or interest is past due and a maturity date is not applicable.

[16] 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.

[17] As of September 30, 2015, the Company had residential mortgage loans that were in the process of foreclosure with a fair value of $5.7 million.

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

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