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Consolidated Condensed Schedule Of Investments (Long Investments) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Schedule of Investments [Line Items]    
Financial Instruments Sold, Not yet Purchased, at Fair Value $ (845,614) $ (622,301)
Fair Value 1,730,130 1,375,116
Investment Owned, at Cost 1,688,257 1,328,153
Percentage collaterallized by GNRCMO certificates 100.00% 100.00%
Unrated But Agency-Guaranteed [Member]
   
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 164.58% 161.52%
Long Investment AAA Rating [Member]
   
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity   0.01%
Long Investment AA Rating [Member]
   
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity   0.26%
Long Investment A Rating [Member]
   
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 0.34% 1.02%
Long Investment BBB Rating [Member]
   
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 2.97% 3.70%
Long Investment BB Rating [Member]
   
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 97.95% 102.40%
Long Investment Unrated Rating [Member]
   
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 10.52% 2.66%
Principal And Interest - Fixed Rate Agency Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 137.75% [1],[2],[3],[4],[5] 148.21% [1],[2],[6],[7]
Fair Value 862,368 [2],[3],[4],[5] 750,454 [2],[6],[7]
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2043-01 [2],[3],[4],[5]  
Fair Value 37,742 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2042-10 [2],[3],[4],[5]  
Fair Value 27,407 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-11 [2],[3],[4],[5]  
Fair Value 18,327 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2043-04 [2],[3],[4],[5]  
Fair Value 17,322 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2041-08 [2],[3],[4],[5]  
Fair Value 16,910 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2028-06 [2],[3],[4],[5]  
Fair Value 16,729 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-11 [2],[3],[4],[5]  
Fair Value 16,279 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2041-10 [2],[3],[4],[5]  
Fair Value 15,958 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2041-09 [2],[3],[4],[5]  
Fair Value 15,743 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 13,783 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2041-07 [2],[3],[4],[5]  
Fair Value 13,692 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2041-03 [2],[3],[4],[5]  
Fair Value 13,444 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 12,005 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 11,861 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2042-08 [2],[3],[4],[5]  
Fair Value 11,263 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-07 [2],[3],[4],[5]  
Fair Value 9,979 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 9,409 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2041-10 [2],[3],[4],[5]  
Fair Value 9,378 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-12 [2],[3],[4],[5]  
Fair Value 9,326 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2043-02 [2],[3],[4],[5]  
Fair Value 9,251 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-11 [2],[3],[4],[5]  
Fair Value 9,013 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2026-04 [2],[3],[4],[5]  
Fair Value 7,898 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 7,326 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2042-11 [2],[3],[4],[5]  
Fair Value 7,299 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 7,005 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.50% [2],[3],[4],[5]  
Maturity 2039-10 [2],[3],[4],[5]  
Fair Value 6,946 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-09 [2],[3],[4],[5]  
Fair Value 6,865 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-12 [2],[3],[4],[5]  
Fair Value 6,418 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 6,228 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 6,218 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.46% [2],[3],[4],[5]  
Maturity 2063-02 [2],[3],[4],[5]  
Fair Value 6,136 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 6,083 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2042-04 [2],[3],[4],[5]  
Fair Value 6,035 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2043-01 [2],[3],[4],[5]  
Fair Value 5,967 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 5,925 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 5,867 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.54% [2],[3],[4],[5]  
Maturity 2062-11 [2],[3],[4],[5]  
Fair Value 5,859 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.58% [2],[3],[4],[5]  
Maturity 2062-10 [2],[3],[4],[5]  
Fair Value 5,733 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.63% [2],[3],[4],[5]  
Maturity 2061-06 [2],[3],[4],[5]  
Fair Value 5,688 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2043-04 [2],[3],[4],[5]  
Fair Value 5,676 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.60% [2],[3],[4],[5]  
Maturity 2062-06 [2],[3],[4],[5]  
Fair Value 5,672 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-11 [2],[3],[4],[5]  
Fair Value 5,668 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2026-07 [2],[3],[4],[5]  
Fair Value 5,593 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 5,460 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 5,442 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-01 [2],[3],[4],[5]  
Fair Value 5,063 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 4,897 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2042-04 [2],[3],[4],[5]  
Fair Value 4,873 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2043-06 [2],[3],[4],[5]  
Fair Value 4,776 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 4,768 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-11 [2],[3],[4],[5]  
Fair Value 4,758 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 4,754 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 4,715 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-09 [2],[3],[4],[5]  
Fair Value 4,625 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 4,586 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2043-02 [2],[3],[4],[5]  
Fair Value 4,435 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 4,423 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 4,387 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-11 [2],[3],[4],[5]  
Fair Value 4,372 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.69% [2],[3],[4],[5]  
Maturity 2061-07 [2],[3],[4],[5]  
Fair Value 4,288 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.75% [2],[3],[4],[5]  
Maturity 2061-01 [2],[3],[4],[5]  
Fair Value 4,213 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2040-11 [2],[3],[4],[5]  
Fair Value 4,203 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2044-01 [2],[3],[4],[5]  
Fair Value 4,169 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.80% [2],[3],[4],[5]  
Maturity 2061-02 [2],[3],[4],[5]  
Fair Value 4,157 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2043-06 [2],[3],[4],[5]  
Fair Value 4,137 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 4,043 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-11 [2],[3],[4],[5]  
Fair Value 3,885 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-12 [2],[3],[4],[5]  
Fair Value 3,837 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2028-03 [2],[3],[4],[5]  
Fair Value 3,810 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.66% [2],[3],[4],[5]  
Maturity 2063-01 [2],[3],[4],[5]  
Fair Value 3,772 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2040-12 [2],[3],[4],[5]  
Fair Value 3,759 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 3,715 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 3,710 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 3,683 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 3,613 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 3,608 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 3,479 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2043-06 [2],[3],[4],[5]  
Fair Value 3,454 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2035-10 [2],[3],[4],[5]  
Fair Value 3,429 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.68% [2],[3],[4],[5]  
Maturity 2061-10 [2],[3],[4],[5]  
Fair Value 3,421 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.54% [2],[3],[4],[5]  
Maturity 2060-02 [2],[3],[4],[5]  
Fair Value 3,420 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2042-06 [2],[3],[4],[5]  
Fair Value 3,419 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2028-06 [2],[3],[4],[5]  
Fair Value 3,412 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2043-01 [2],[3],[4],[5]  
Fair Value 3,407 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2026-06 [2],[3],[4],[5]  
Fair Value 3,362 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.50% [2],[3],[4],[5]  
Maturity 2028-11 [2],[3],[4],[5]  
Fair Value 3,355 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-08 [2],[3],[4],[5]  
Fair Value 3,294 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2028-06 [2],[3],[4],[5]  
Fair Value 3,274 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2043-11 [2],[3],[4],[5]  
Fair Value 3,261 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2028-03 [2],[3],[4],[5]  
Fair Value 3,249 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.00% [2],[3],[4],[5]  
Maturity 2043-10 [2],[3],[4],[5]  
Fair Value 3,247 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2028-07 [2],[3],[4],[5]  
Fair Value 3,193 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2043-09 [2],[3],[4],[5]  
Fair Value 3,191 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.50% [2],[3],[4],[5]  
Maturity 2042-04 [2],[3],[4],[5]  
Fair Value 3,182 [2],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 111,228 [2],[3],[4],[5] 69,330 [2],[6],[7]
Investment Owned Description Other Federal National Mortgage Association Pools [2],[3],[4],[5] Other Federal National Mortgage Association Pools [2],[6],[7]
Fair Value 115,792 [2],[3],[4],[5] 74,508 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 3.00% [2],[3],[4],[5] 2.50% [2],[6],[7]
Maturity 2028-06 [2],[3],[4],[5] 2026-03 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 6.00% [2],[3],[4],[5] 6.00% [2],[6],[7]
Maturity 2044-01 [2],[3],[4],[5] 2043-01 [2],[6],[7]
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 80,675 [2],[3],[4],[5] 19,340 [2],[6],[7]
Investment Owned Description Other Federal Home Loan Mortgage Corporation Pools [2],[3],[4],[5] Other Federal Home Loan Mortgage Corporation Pools [2],[6],[7]
Fair Value 81,716 [2],[3],[4],[5] 20,744 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 2.50% [2],[3],[4],[5] 3.50% [2],[6],[7]
Maturity 2028-09 [2],[3],[4],[5] 2026-04 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 6.00% [2],[3],[4],[5] 6.00% [2],[6],[7]
Maturity 2043-12 [2],[3],[4],[5] 2042-12 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 8,191 [2],[3],[4],[5]  
Investment Owned Description Other Government National Mortgage Association Pools [2],[3],[4],[5]  
Fair Value 8,949 [2],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 4.49% [2],[3],[4],[5]  
Maturity 2061-11 [2],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 4.68% [2],[3],[4],[5]  
Maturity 2062-11 [2],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 49,427 Federal National Mortgage Association Pool, 3.50% 2042-12 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   49,427 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-12 [2],[6],[7]
Fair Value   52,864 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 45,304 Federal Home Loan Mortgage Corporation Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   45,304 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   48,596 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 35,601 Federal National Mortgage Association Pool 5.00% 2037-07 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   35,601 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2037-07 [2],[6],[7]
Fair Value   38,657 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 21,338 Federal National Mortgage Association Pool 4.50% 2041-12 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   21,338 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-12 [2],[6],[7]
Fair Value   23,268 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 18,227 Federal National Mortgage Association Pool 3.50% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   18,227 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   19,552 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,845 Federal National Mortgage Association Pool 4.50% 2041-09 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   17,845 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-09 [2],[6],[7]
Fair Value   19,459 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,634 Federal Home Loan Mortgage Corporation Pool 5.00% 2041-07 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   17,634 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2041-07 [2],[6],[7]
Fair Value   19,218 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,621 Federal National Mortgage Association Pool 5.00% 2041-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   17,621 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2041-08 [2],[6],[7]
Fair Value   19,201 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,113 Federal National Mortgage Association Pool 4.50% 2041-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   17,113 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-10 [2],[6],[7]
Fair Value   18,661 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,869 Federal National Mortgage Association Pool 5.00% 2041-03 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   15,869 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2041-03 [2],[6],[7]
Fair Value   17,430 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,911 Federal National Mortgage Association Pool 3.00% 2042-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   14,911 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.00% [2],[6],[7]
Maturity   2042-10 [2],[6],[7]
Fair Value   15,642 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,242 Federal National Mortgage Association Pool 4.00% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   14,242 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   15,407 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 13,519 Federal Home Loan Mortgage Corporation Pool 3.00% 2042-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   13,519 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.00% [2],[6],[7]
Maturity   2042-10 [2],[6],[7]
Fair Value   14,157 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,985 Federal National Mortgage Association Pool 4.50% 2041-09 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   11,985 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-09 [2],[6],[7]
Fair Value   12,994 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,942 Federal National Mortgage Association Pool 4.00% 2041-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   11,942 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2041-11 [2],[6],[7]
Fair Value   12,848 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,003 Federal National Mortgage Association Pool 5.00% 2041-07 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   11,003 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2041-07 [2],[6],[7]
Fair Value   12,058 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 10,576 Federal National Mortgage Association Pool 4.00% 2042-01 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   10,576 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-01 [2],[6],[7]
Fair Value   11,355 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,576 Federal National Mortgage Association Pool 4.50% 2026-04 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   9,576 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2026-04 [2],[6],[7]
Fair Value   10,338 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,002 Federal Home Loan Mortgage Corporation Pool 4.50% 2041-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   9,002 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-10 [2],[6],[7]
Fair Value   9,772 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,321 Federal Home Loan Mortgage Corporation Pool 4.50% 2041-02 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   8,321 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-02 [2],[6],[7]
Fair Value   9,038 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,395 Federal National Mortgage Association Pool 5.50% 2039-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   7,395 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.50% [2],[6],[7]
Maturity   2039-10 [2],[6],[7]
Fair Value   8,075 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,428 Federal National Mortgage Association Pool 3.50% 2042-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   7,428 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-10 [2],[6],[7]
Fair Value   7,984 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,352 Federal National Mortgage Association Pool 4.00% 2026-07 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   7,352 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2026-07 [2],[6],[7]
Fair Value   7,888 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,324 Federal National Mortgage Association Pool 5.00% 2041-06 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,324 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2041-06 [2],[6],[7]
Fair Value   6,891 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,929 Federal National Mortgage Association Pool 3.50% 2042-05 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,929 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-05 [2],[6],[7]
Fair Value   6,356 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,689 Federal Home Loan Mortgage Corporation Pool 4.00% 2042-05 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,689 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-05 [2],[6],[7]
Fair Value   6,141 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,592 Federal National Mortgage Association Pool 4.00% 2041-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,592 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2041-10 [2],[6],[7]
Fair Value   6,079 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,642 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,642 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   6,020 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,494 Federal National Association Pool 3.50% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,494 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   5,862 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,085 Federal National Mortgage Association Pool 5.00% 2041-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,085 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2041-10 [2],[6],[7]
Fair Value   5,534 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,085 Federal National Mortgage Association Pool 4.00% 2042-04 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,085 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-04 [2],[6],[7]
Fair Value   5,531 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,045 Federal National Mortgage Association Pool 5.00% 2040-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,045 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2040-11 [2],[6],[7]
Fair Value   5,497 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,025 Federal National Mortgage Association Pool 5.00% 2041-07 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,025 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2041-07 [2],[6],[7]
Fair Value   5,444 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,944 Federal National Mortgage Association Pool 4.50% 2041-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,944 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-08 [2],[6],[7]
Fair Value   5,361 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,911 Federal Home Loan Mortgage Corporation Pool 3.50% 2042-09 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,911 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-09 [2],[6],[7]
Fair Value   5,242 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,676 Federal National Mortgage Association Pool 4.00% 2042-09 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,676 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-09 [2],[6],[7]
Fair Value   5,059 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,725 Federal National Mortgage Association Pool 3.50% 2042-07 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,725 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-07 [2],[6],[7]
Fair Value   5,042 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,699 Federal National Mortgage Association Pool 4.00% 2026-06 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,699 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2026-06 [2],[6],[7]
Fair Value   5,041 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,513 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,513 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   4,828 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,465 Federal Home Loan Mortgage Corporation Pool 4.00% 2042-02 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,465 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-02 [2],[6],[7]
Fair Value   4,787 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,456 Federal National Mortgage Association Pool 3.00% 2027-07 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,456 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.00% [2],[6],[7]
Maturity   2027-07 [2],[6],[7]
Fair Value   4,710 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,261 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,261 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   4,573 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,009 Federal Home Loan Mortgage Corporation Pool 4.00% 2041-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,009 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2041-11 [2],[6],[7]
Fair Value   4,303 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,964 Federal Home Loan Mortgage Corporation Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,964 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   4,229 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,926 Federal National Mortgage Association Pool 3.50% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,926 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   4,189 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,798 Federal National Mortgage Association Pool 5.00% 2035-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,798 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2035-10 [2],[6],[7]
Fair Value   4,172 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,864 Federal Home Loan Mortgage Corporation Pool 3.50% 2042-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,864 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-10 [2],[6],[7]
Fair Value   4,116 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,728 Federal National Mortgage Association Pool 5.00% 2040-06 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,728 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.00% [2],[6],[7]
Maturity   2040-06 [2],[6],[7]
Fair Value   4,062 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,726 Federal National Mortgage Association Pool 4.50% 2041-12 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,726 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-12 [2],[6],[7]
Fair Value   4,040 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,763 Federal National Mortgage Association Pool 3.50% 2027-06 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,763 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2027-06 [2],[6],[7]
Fair Value   4,022 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,766 Federal National Mortgage Association Pool 3.00% 2027-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,766 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.00% [2],[6],[7]
Maturity   2027-08 [2],[6],[7]
Fair Value   3,980 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,606 Federal National Mortgage Association Pool 4.50% 2042-04 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,606 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2042-04 [2],[6],[7]
Fair Value   3,941 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,526 Federal Home Loan Mortgage Corporation Pool 6.00% 2039-04 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,526 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   6.00% [2],[6],[7]
Maturity   2039-04 [2],[6],[7]
Fair Value   3,848 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,534 Federal National Mortgage Association Pool 3.50% 2042-12 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,534 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-12 [2],[6],[7]
Fair Value   3,770 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,442 Federal Home Loan Mortgage Corporation Pool 4.50% 2041-09 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,442 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-09 [2],[6],[7]
Fair Value   3,737 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,483 Federal Home Loan Mortgage Corporation Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,483 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   3,712 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,419 Federal National Mortgage Association Pool 4.00% 2042-04 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,419 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-04 [2],[6],[7]
Fair Value   3,706 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,404 Federal Home Loan Mortgage Corporation Pool 4.00% 2042-01 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,404 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-01 [2],[6],[7]
Fair Value   3,653 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,344 Federal National Mortgage Association Pool 4.00% 2042-09 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,344 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-09 [2],[6],[7]
Fair Value   3,618 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,415 Federal Home Loan Mortgage Corporation Pool 3.00% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,415 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.00% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   3,573 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,288 Federal Home Loan Mortgage Corporation Pool 3.50% 2042-02 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,288 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-02 [2],[6],[7]
Fair Value   3,518 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,182 Federal National Mortgage Association Pool 4.00% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,182 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   3,440 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,095 Federal National Mortgage Association Pool 4.50% 2041-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,095 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-11 [2],[6],[7]
Fair Value   3,355 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,053 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,053 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   3,262 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,931 Federal National Mortgage Association Pool 4.00% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,931 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   3,178 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,947 Federal National Mortgage Association Pool 3.50% 2027-07 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,947 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2027-07 [2],[6],[7]
Fair Value   3,145 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,921 Federal National Mortgage Association Pool 3.50% 2027-06 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,921 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2027-06 [2],[6],[7]
Fair Value   3,123 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,828 Federal National Mortgage Association Pool 4.50% 2041-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,828 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-10 [2],[6],[7]
Fair Value   3,076 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,605 Government National Mortgage Association 4.55% 2062-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,605 [2],[6],[7]
Investment Owned Description   Government National Mortgage Association [2],[6],[7]
Rate   4.55% [2],[6],[7]
Maturity   2062-10 [2],[6],[7]
Fair Value   2,977 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,676 Federal National Mortgage Association Pool 4.50% 2041-10 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,676 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2041-10 [2],[6],[7]
Fair Value   2,901 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,566 Federal National Mortgage Association Pool 4.00% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,566 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   2,774 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,490 Federal National Mortgage Association Pool 4.50% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,490 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.50% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   2,719 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,497 Federal National Mortgage Association Pool 4.00% 2042-09 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,497 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-09 [2],[6],[7]
Fair Value   2,699 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,519 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,519 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   2,690 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,520 Federal Home Loan Mortgage Corporation Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,520 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   2,685 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,498 Federal National Mortgage Association Pool 3.50% 2042-08 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,498 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-08 [2],[6],[7]
Fair Value   2,679 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,500 Federal Home Loan Mortgage Corporation Pool 3.50% 2042-01 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,500 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-01 [2],[6],[7]
Fair Value   2,667 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,452 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,452 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.50% [2],[6],[7]
Maturity   2042-11 [2],[6],[7]
Fair Value   2,619 [2],[6],[7]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,377 Federal National Mortgage Association Pool 4.00% 2042-06 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,377 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2042-06 [2],[6],[7]
Fair Value   2,564 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 3.06% [1],[2],[3],[4],[5] 0.64% [1],[2],[6],[7]
Fair Value 19,132 [2],[3],[4],[5] 3,250 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 97,796 [2],[3],[4],[5] 20,095 [2],[6],[7]
Investment Owned Description Other Federal National Mortgage Association [2],[3],[4],[5] Other Federal National Mortgage Association [2],[6],[7]
Fair Value 13,821 [2],[3],[4],[5] 1,920 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 3.00% [2],[3],[4],[5] 4.00% [2],[6],[7]
Maturity 2020-12 [2],[3],[4],[5] 2036-01 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 5.50% [2],[3],[4],[5] 5.50% [2],[6],[7]
Maturity 2043-06 [2],[3],[4],[5] 2040-10 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 21,959 [2],[3],[4],[5] 10,426 [2],[6],[7]
Investment Owned Description Other Federal Home Loan Mortgage Corporation [2],[3],[4],[5] Other Federal Home Loan Mortgage Corporation [2],[6],[7]
Fair Value 3,577 [2],[3],[4],[5] 1,195 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 3.00% [2],[3],[4],[5] 5.00% [2],[6],[7]
Maturity 2032-12 [2],[3],[4],[5] 2033-06 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 5.50% [2],[3],[4],[5] 5.50% [2],[6],[7]
Maturity 2043-01 [2],[3],[4],[5] 2039-01 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 10,460 [2],[3],[4],[5] 4,269 [2],[6],[7]
Investment Owned Description Other Government National Mortgage Association [2],[3],[4],[5] Other Government National Mortgage Association [2],[6],[7]
Rate   5.50% [2],[6],[7]
Maturity   2036-03 [2],[6],[7]
Fair Value 1,734 [2],[3],[4],[5] 135 [2],[6],[7]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 3.00% [2],[3],[4],[5]  
Maturity 2036-03 [2],[3],[4],[5]  
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 5.50% [2],[3],[4],[5]  
Maturity 2042-11 [2],[3],[4],[5]  
TBA - Fixed Rate Agency Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 15.47% [1],[2],[3],[4],[5] 8.61% [1],[2],[6],[7]
Fair Value 96,856 [2],[3],[4],[5] 43,610 [2],[6],[7]
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation (30 Year) [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2014-01 [2],[3],[4],[5]  
Fair Value 60,016 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association (30 Year) [2],[3],[4],[5]  
Rate 3.00% [2],[3],[4],[5]  
Maturity 2014-01 [2],[3],[4],[5]  
Fair Value 29,612 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation (30 Year) [2],[3],[4],[5]  
Rate 5.00% [2],[3],[4],[5]  
Maturity 2014-01 [2],[3],[4],[5]  
Fair Value 7,228 [2],[3],[4],[5]  
TBA - Fixed Rate Agency Securities [Member] | 18,950 Federal Home Loan Mortgage Corporation (30 Years) 4.00% 2013-01 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   18,950 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation (30 Year) [2],[6],[7]
Rate   4.00% [2],[6],[7]
Maturity   2013-01 [2],[6],[7]
Fair Value   20,232 [2],[6],[7]
TBA - Fixed Rate Agency Securities [Member] | 16,600 Federal National Mortgage Association (15 Years) 3.00% 2013-01 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   16,600 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association (15 Year) [2],[6],[7]
Rate   3.00% [2],[6],[7]
Maturity   2013-01 [2],[6],[7]
Fair Value   17,523 [2],[6],[7]
TBA - Fixed Rate Agency Securities [Member] | 5,600 Federal Home Loan Mortgage Corporation (30 Years) 3.00% 2013-01 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,600 [2],[6],[7]
Investment Owned Description   Federal Home Loan Mortgage Corporation (30 Year) [2],[6],[7]
Rate   3.00% [2],[6],[7]
Maturity   2013-01 [2],[6],[7]
Fair Value   5,855 [2],[6],[7]
Fixed Rate Agency Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 156.28% [1],[2],[3],[4],[5] 157.46% [1],[2],[6],[7]
Fair Value 978,356 [2],[3],[4],[5] 797,314 [2],[6],[7]
Investment Owned, at Cost 992,207 [2],[3],[4],[5] 789,964 [2],[6],[7]
Principal And Interest - Floating Rate Agency Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 4.89% [1],[2],[3],[4],[5] 3.39% [1],[2],[6],[7]
Fair Value 30,618 [2],[3],[4],[5] 17,169 [2],[6],[7]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,667 [2],[3],[4],[5] 3,159 [2],[6],[7]
Investment Owned Description Other Federal National Mortgage Association Pools [2],[3],[4],[5] Other Federal National Mortgage Association Pools [2],[6],[7]
Fair Value 3,900 [2],[3],[4],[5] 3,385 [2],[6],[7]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 2.64% [2],[3],[4],[5] 4.93% [2],[6],[7]
Maturity 2036-04 [2],[3],[4],[5] 2037-07 [2],[6],[7]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 6.05% [2],[3],[4],[5] 5.50% [2],[6],[7]
Maturity 2037-09 [2],[3],[4],[5] 2037-09 [2],[6],[7]
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 3,148 [2],[3],[4],[5]  
Investment Owned Description Other Federal Home Loan Mortgage Corporation Pools [2],[3],[4],[5]  
Fair Value 3,341 [2],[3],[4],[5]  
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 5.83% [2],[3],[4],[5]  
Maturity 2037-06 [2],[3],[4],[5]  
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 5.89% [2],[3],[4],[5]  
Maturity 2037-07 [2],[3],[4],[5]  
Principal And Interest - Floating Rate Agency Securities [Member] | 6,281 Federal Home Loan Mortgage Corporation Pool, 4.92% 2038-04 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 6,281 [2],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [2],[3],[4],[5]  
Rate 4.92% [2],[3],[4],[5]  
Maturity 2038-04 [2],[3],[4],[5]  
Fair Value 6,709 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 4.27% [2],[3],[4],[5]  
Maturity 2040-04 [2],[3],[4],[5]  
Fair Value 5,256 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 5.73% [2],[3],[4],[5]  
Maturity 2037-07 [2],[3],[4],[5]  
Fair Value 3,937 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 2.53% [2],[3],[4],[5]  
Maturity 2038-05 [2],[3],[4],[5]  
Fair Value 3,878 [2],[3],[4],[5]  
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 [2],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [2],[3],[4],[5]  
Rate 6.10% [2],[3],[4],[5]  
Maturity 2037-08 [2],[3],[4],[5]  
Fair Value 3,597 [2],[3],[4],[5]  
Principal And Interest - Floating Rate Agency Securities [Member] | 6,045 Federal National Mortgage Association Pool 5.08% 2038-05 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,045 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.08% [2],[6],[7]
Maturity   2038-05 [2],[6],[7]
Fair Value   6,374 [2],[6],[7]
Principal And Interest - Floating Rate Agency Securities [Member] | 4,537 Federal National Mortgage Association Pool 3.14% 2035-12 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,537 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   3.14% [2],[6],[7]
Maturity   2035-12 [2],[6],[7]
Fair Value   4,783 [2],[6],[7]
Principal And Interest - Floating Rate Agency Securities [Member] | 2,478 Federal National Mortgage Association Pool 5.69% 2036-04 [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,478 [2],[6],[7]
Investment Owned Description   Federal National Mortgage Association Pool [2],[6],[7]
Rate   5.69% [2],[6],[7]
Maturity   2036-04 [2],[6],[7]
Fair Value   2,627 [2],[6],[7]
Interest Only - Floating Rate Agency Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 3.41% [1],[2],[3],[4],[5] 0.67% [1],[2],[6],[7]
Fair Value 21,372 [2],[3],[4],[5] 3,394 [2],[6],[7]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 25,322 [2],[3],[4],[5] 1,042 [2],[6],[7]
Investment Owned Description Other Federal National Mortgage Association [2],[3],[4],[5] Other Federal National Mortgage Association [2],[6],[7]
Rate   5.50% [2],[6],[7]
Maturity   2036-08 [2],[6],[7]
Fair Value 4,600 [2],[3],[4],[5] 152 [2],[6],[7]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 5.50% [2],[3],[4],[5]  
Maturity 2036-08 [2],[3],[4],[5]  
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 6.59% [2],[3],[4],[5]  
Maturity 2043-07 [2],[3],[4],[5]  
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 18,180 [2],[3],[4],[5]  
Investment Owned Description Other Federal Home Loan Mortgage Corporation [2],[3],[4],[5]  
Fair Value 2,433 [2],[3],[4],[5]  
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 5.83% [2],[3],[4],[5]  
Maturity 2038-11 [2],[3],[4],[5]  
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 6.53% [2],[3],[4],[5]  
Maturity 2039-08 [2],[3],[4],[5]  
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 108,194 [2],[3],[4],[5]  
Investment Owned Description Other Government National Mortgage Association [2],[3],[4],[5]  
Fair Value 11,987 [2],[3],[4],[5]  
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 1.64% [2],[3],[4],[5]  
Maturity 2042-11 [2],[3],[4],[5]  
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 6.58% [2],[3],[4],[5]  
Maturity 2063-08 [2],[3],[4],[5]  
Interest Only - Floating Rate Agency Securities [Member] | Resecuritization of Government National Mortgage Association [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 22,796 [2],[3],[4],[5],[8] 23,140 [2],[6],[7],[8]
Investment Owned Description Resecuritization of Government National Mortgage Association (t) [2],[3],[4],[5],[8] Resecuritization of Government National Mortgage Association (o) [2],[6],[7],[8]
Rate 4.34% [2],[3],[4],[5],[8] 4.28% [2],[6],[7],[8]
Maturity 2060-08 [2],[3],[4],[5],[8] 2060-08 [2],[6],[7],[8]
Fair Value 2,352 [2],[3],[4],[5],[8] 3,242 [2],[6],[7],[8]
Floating Rate Agency Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 8.30% [1],[2],[3],[4],[5] 4.06% [1],[2],[6],[7]
Fair Value 51,990 [2],[3],[4],[5] 20,563 [2],[6],[7]
Investment Owned, at Cost 50,969 [2],[3],[4],[5] 19,979 [2],[6],[7]
Agency Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 164.58% [1],[2],[3],[4],[5] 161.52% [1],[2],[6],[7]
Fair Value 1,030,346 [2],[3],[4],[5] 817,877 [2],[6],[7]
Investment Owned, at Cost 1,043,176 [2],[3],[4],[5] 809,943 [2],[6],[7]
Principal And Interest - Private Label Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 97.40% [1],[2],[3],[4] 107.47% [1],[2],[6]
Fair Value 609,766 [2],[3],[4] 544,208 [2],[6]
Investment Owned, at Cost 555,708 [2],[3],[4] 505,380 [2],[6]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 920,032 [2],[3],[4] 850,320 [2],[6]
Investment Owned Description Various [2],[3],[4] Various [2],[6]
Fair Value 609,766 [2],[3],[4] 544,208 [2],[6]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 0.24% [2],[3],[4] 0.17% [2],[6]
Maturity 2019-05 [2],[3],[4] 2019-05 [2],[6]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 9.35% [2],[3],[4] 9.35% [2],[6]
Maturity 2050-06 [2],[3],[4] 2047-05 [2],[6]
Principal Only - Private Label Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 0.45% [1],[2],[3],[4] 0.46% [1],[6]
Fair Value 2,784 [2],[3],[4] 2,320 [2],[6]
Investment Owned, at Cost 2,477 [2],[3],[4] 2,242 [2],[6]
Principal Only - Private Label Securities [Member] | Various Issuer [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,800 [2],[3],[4] 5,800 [2],[6]
Investment Owned Description Various [2],[3],[4] Various [2],[6]
Rate 0.00% [2],[3],[4] 0.00% [2],[6]
Maturity 2030-08 [2],[3],[4] 2030-08 [2],[6]
Fair Value 2,784 [2],[3],[4] 2,320 [2],[6]
Interest Only - Private Label Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 0.19% [1],[2],[3],[4] 0.23% [1],[2],[6]
Fair Value 1,216 [2],[3],[4] 1,165 [2],[6]
Investment Owned, at Cost 519 [2],[3],[4] 637 [2],[6]
Interest Only - Private Label Securities [Member] | Various Issuer [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 50,649 [2],[3],[4] 61,640 [2],[6]
Investment Owned Description Various [2],[3],[4] Various [2],[6]
Fair Value 1,216 [2],[3],[4] 1,165 [2],[6]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 0.50% [2],[3],[4] 0.50% [2],[6]
Maturity 2044-06 [2],[3],[4] 2044-06 [2],[6]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 2.00% [2],[3],[4] 2.00% [2],[6]
Maturity 2047-09 [2],[3],[4] 2047-09 [2],[6]
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]
Fair Value 0 [2],[3],[4] 0 [2],[6]
Investment Owned, at Cost 345 [2],[3],[4] 429 [2],[6]
Other Private Label Securities [Member] | Various Issuer [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 127,491 [2],[3],[4] 158,348 [2],[6]
Investment Owned Description Various [2],[3],[4] Various [2],[6]
Rate 0.00% [2],[3],[4] 0.00% [2],[6]
Maturity   2037-06 [2],[6]
Fair Value 0 [2],[3],[4] 0 [2],[6]
Other Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Maturity 2037-06 [2],[3],[4]  
Other Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Maturity 2045-07 [2],[3],[4]  
Private Label Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 98.04% [1],[2],[3],[4] 108.16% [1],[2],[6]
Fair Value 613,766 [2],[3],[4] 547,693 [2],[6]
Investment Owned, at Cost 559,049 [2],[3],[4] 508,688 [2],[6]
Mortgage-Backed Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 262.62% [1],[2],[3],[4] 269.68% [1],[2],[6]
Fair Value 1,644,112 [2],[3],[4] 1,365,570 [2],[6]
Investment Owned, at Cost 1,602,225 [2],[3],[4] 1,318,631 [2],[6]
Asset-backed Securities [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 6.08% [1],[2],[3],[4]  
Fair Value 38,069 [2],[3],[4]  
Investment Owned, at Cost 38,758 [2],[3],[4]  
Asset-backed Securities [Member] | Various Issuer [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 42,822 [2],[3],[4]  
Investment Owned Description Various [2],[3],[4]  
Fair Value 38,069 [2],[3],[4]  
Asset-backed Securities [Member] | Various Issuer [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 0.00% [2],[3],[4]  
Maturity 2017-06 [2],[3],[4]  
Asset-backed Securities [Member] | Various Issuer [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 9.74% [2],[3],[4]  
Maturity 2040-12 [2],[3],[4]  
Commercial Mortgage Loans [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 3.82% [1],[2],[3],[4],[9] 1.89% [1],[10],[2],[6]
Fair Value 23,887 [2],[3],[4],[9] 9,546 [10],[2],[6]
Investment Owned, at Cost 23,212 [2],[3],[4],[9] 9,522 [10],[2],[6]
Commercial Mortgage Loans [Member] | Various Issuer [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 26,227 [2],[3],[4],[9] 10,225 [10],[2],[6]
Investment Owned Description Various [2],[3],[4],[9] Various [10],[2],[6]
Fair Value 23,887 [2],[3],[4],[9] 9,546 [10],[2],[6]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Rate 0.00% [2],[3],[4],[9] 5.00% [10],[2],[6]
Maturity 2014-06 [2],[3],[4],[9] 2013-11 [10],[2],[6]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Rate 7.25% [2],[3],[4],[9] 6.25% [10],[2],[6]
Maturity 2016-12 [2],[3],[4],[9] 2039-05 [10],[2],[6]
Residential Mortgage Loans [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 3.84% [1],[2],[3],[4]  
Fair Value 24,062 [2],[3],[4]  
Investment Owned, at Cost 24,062 [2],[3],[4]  
Residential Mortgage Loans [Member] | Various Issuer [Member]
   
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 36,218 [2],[3],[4]  
Investment Owned Description Various [2],[3],[4]  
Rate 0.00% [2],[3],[4]  
Fair Value 24,062 [2],[3],[4]  
Residential Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member]
   
Schedule of Investments [Line Items]    
Maturity 2024-08  
Residential Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member]
   
Schedule of Investments [Line Items]    
Maturity 2042-10  
Long Investments [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 276.36% [1],[2],[3],[4] 271.57% [1],[2],[6]
Current Principal/Notional Amount 2,478,291  
Fair Value 1,730,130 [2],[3],[4] 1,375,116 [2],[6]
Investment Owned, at Cost 1,688,257 [2],[3],[4] 1,328,153 [2],[6]
Long Investments [Member] | North America [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 275.44%  
Current Principal/Notional Amount 2,470,650  
Fair Value 1,724,370  
Investment Owned, at Cost 1,682,533  
Long Investments [Member] | Europe [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 0.92%  
Current Principal/Notional Amount 7,641  
Fair Value 5,760  
Investment Owned, at Cost 5,724  
Long Investments [Member] | Federal National Mortgage Association [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 100.85% 119.78%
Long Investments [Member] | Federal Home Loan Mortgage Corporation [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 51.37% 40.49%
Long Investments [Member] | Government National Mortgage Association [Member]
   
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 12.36% 1.25%
Commercial Mortgage Loan With Extendable Maturity [Member] | Commercial Mortgage Loans [Member] | Various Issuer [Member]
   
Schedule of Investments [Line Items]    
Fair Value $ 5,000 $ 4,900
[1] Classification percentages are based on Total Equity.
[2] See Note 2 and Note 3 in Notes to Consolidated Financial Statements.
[3] The following table details the breakout by geographical region of long investments, investments sold short, and repurchase agreements:Region Current Principal/Number of Shares Cost 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 %
[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 Fannie Mae, Freddie Mac, or Ginnie Mae. 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%
[5] 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.
[6] 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 Fannie Mae, Freddie Mac, or Ginnie Mae. 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 161.52%Aaa/AAA/AAA 0.01%Aa/AA/AA 0.26%A/A/A 1.02%Baa/BBB/BBB 3.70%Ba/BB/BB or below 102.40%Unrated 2.66%
[7] At December 31, 2012, 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 119.78%, 40.49%, and 1.25% of equity, respectively.
[8] Private trust 100% backed by interest in Government National Mortgage Association collateralized mortgage obligation certificates.
[9] 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.
[10] Includes a loan with a fair value in the amount of $4.9 million where the maturity date may be extended through November 4, 2015 as well as a non-performing commercial whole loan.