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Consolidated Condensed Schedule Of Investments (Long Investments) (USD $)
 6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Schedule of Investments [Line Items]    
Fair Value $ 1,753,832,000 $ 1,730,130,000
Investment Owned, at Cost 1,693,248,000 1,688,257,000
Percentage collaterallized by GNRCMO certificates 100.00% 100.00%
Non-performing loans, maturity date not applicable 17,100,000  
Unrated But Agency-Guaranteed [Member]
    
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 173.68% 164.58%
Long Investment A Rating [Member]
    
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 0.03% 0.34%
Long Investment BBB Rating [Member]
    
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 3.57% 2.97%
Long Investment BB Rating [Member]
    
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 83.28% 97.95%
Long Investment Unrated Rating [Member]
    
Schedule of Investments [Line Items]    
Long investment holdings as a percentage of stockholders' equity 17.33% 10.52%
Principal And Interest - Fixed Rate Agency Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 142.75% [1],[2],[3],[4],[5] 137.75% [1],[2],[6],[7],[8]
Fair Value 900,962,000 [1],[3],[4],[5] 862,368,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 26,584 Federal National Mortgage Association Pool 3.50% 2042-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 26,584,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2042-10 [1],[3],[4],[5]  
Fair Value 27,404,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,479 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 17,479,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-11 [1],[3],[4],[5]  
Fair Value 18,630,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,629 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 15,629,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-11 [1],[3],[4],[5]  
Fair Value 16,641,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,885 Federal National Mortgage Association Pool 5.00% 2041-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 14,885,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2041-08 [1],[3],[4],[5]  
Fair Value 16,562,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,868 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 12,868,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 13,705,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,461 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 12,461,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-01 [1],[3],[4],[5]  
Fair Value 13,652,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,924 Federal National Mortgage Association Pool 5.00% 2041-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 11,924,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2041-03 [1],[3],[4],[5]  
Fair Value 13,387,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 10,359 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 10,359,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 11,237,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,780 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 9,780,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-06 [1],[3],[4],[5]  
Fair Value 10,430,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,116 Federal National Mortgage Association Pool 4.50% 2044-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 9,116,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-02 [1],[3],[4],[5]  
Fair Value 9,923,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,263 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 9,263,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-07 [1],[3],[4],[5]  
Fair Value 9,824,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,036 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 9,036,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 9,609,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,736 Federal National Mortgage Association Pool 5.00% 2044-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 6,736,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2044-03 [1],[3],[4],[5]  
Fair Value 7,561,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,190 Federal National Mortgage Association Pool 3.50% 2042-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 7,190,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2042-11 [1],[3],[4],[5]  
Fair Value 7,424,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,969 Federal National Mortgage Association Pool 3.50% 2028-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 6,969,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2028-03 [1],[3],[4],[5]  
Fair Value 7,408,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,664 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 6,664,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 7,255,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,583 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 6,583,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-02 [1],[3],[4],[5]  
Fair Value 7,211,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,871 Federal National Mortgage Association Pool 3.50% 2043-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 6,871,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2043-06 [1],[3],[4],[5]  
Fair Value 7,084,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,587 Federal National Mortgage Association Pool 4.50% 2026-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 6,587,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2026-04 [1],[3],[4],[5]  
Fair Value 7,002,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,242 Federal National Mortgage Association Pool 4.00% 2044-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 6,242,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-07 [1],[3],[4],[5]  
Fair Value 6,643,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,690 Federal National Mortgage Association Pool 5.50% 2039-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,690,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.50% [1],[3],[4],[5]  
Maturity 2039-10 [1],[3],[4],[5]  
Fair Value 6,369,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,673 Federal National Mortgage Association Pool 4.50% 2044-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,673,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-02 [1],[3],[4],[5]  
Fair Value 6,224,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,832 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,832,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 6,219,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,835 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,835,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 6,205,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,826 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,826,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 6,199,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,733 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,733,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-01 [1],[3],[4],[5]  
Fair Value 6,100,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,518 Government National Mortgage Association Pool 4.46% 2063-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,518,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.46% [1],[3],[4],[5]  
Maturity 2063-02 [1],[3],[4],[5]  
Fair Value 6,075,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,409 Federal National Mortgage Association Pool 5.00% 2044-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,409,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2044-03 [1],[3],[4],[5]  
Fair Value 6,071,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,648 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,648,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 5,994,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,371 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,371,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 5,993,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,358 Government National Mortgage Association Pool 4.54% 2062-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,358,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.54% [1],[3],[4],[5]  
Maturity 2062-11 [1],[3],[4],[5]  
Fair Value 5,899,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,884 Federal Home Loan Mortgage Corporation Pool 3.00% 2043-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,884,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 3.00% [1],[3],[4],[5]  
Maturity 2043-01 [1],[3],[4],[5]  
Fair Value 5,829,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,462 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,462,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-06 [1],[3],[4],[5]  
Fair Value 5,818,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,459 Federal National Mortgage Association Pool 4.00% 2044-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,459,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-05 [1],[3],[4],[5]  
Fair Value 5,809,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,461 Federal National Mortgage Association Pool 3.50% 2028-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,461,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2028-12 [1],[3],[4],[5]  
Fair Value 5,803,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,457 Federal Home Loan Mortgage Corporation Pool, 3.50% 2029-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,457,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2029-05 [1],[3],[4],[5]  
Fair Value 5,785,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,244 Government National Mortgage Association Pool 4.60% 2062-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,244,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.60% [1],[3],[4],[5]  
Maturity 2062-06 [1],[3],[4],[5]  
Fair Value 5,759,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,294 Federal National Mortgage Association Pool 4.50% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,294,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-11 [1],[3],[4],[5]  
Fair Value 5,748,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,136 Federal National Mortgage Association Pool 4.50% 2043-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,136,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-12 [1],[3],[4],[5]  
Fair Value 5,632,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,174 Government National Mortgage Association Pool 4.63% 2061-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,174,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.63% [1],[3],[4],[5]  
Maturity 2061-06 [1],[3],[4],[5]  
Fair Value 5,625,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,171 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,171,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-06 [1],[3],[4],[5]  
Fair Value 5,494,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,089 Federal National Mortgage Association Pool 4.00% 2044-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,089,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-05 [1],[3],[4],[5]  
Fair Value 5,424,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,945 Federal National Mortgage Association Pool 4.50% 2044-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,945,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-06 [1],[3],[4],[5]  
Fair Value 5,378,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,982 Federal National Mortgage Association Pool 4.00% 2044-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,982,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-01 [1],[3],[4],[5]  
Fair Value 5,314,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,861 Federal National Mortgage Association Pool 4.00% 2043-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,861,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-01 [1],[3],[4],[5]  
Fair Value 5,169,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,706 Federal National Mortgage Association Pool 4.50% 2044-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,706,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-01 [1],[3],[4],[5]  
Fair Value 5,161,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,514 Federal National Mortgage Association Pool 5.00% 2044-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,514,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2044-01 [1],[3],[4],[5]  
Fair Value 5,035,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,708 Federal National Mortgage Association Pool 4.00% 2044-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,708,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-04 [1],[3],[4],[5]  
Fair Value 5,017,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,544 Federal Home Loan Mortgage Corporation Pool 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,544,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 4,974,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,472 Federal National Mortgage Association Pool 4.50% 2044-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,472,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-02 [1],[3],[4],[5]  
Fair Value 4,882,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,429 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,429,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 4,856,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,446 Federal National Mortgage Association Pool 4.50% 2044-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,446,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-05 [1],[3],[4],[5]  
Fair Value 4,841,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,528 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,528,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-02 [1],[3],[4],[5]  
Fair Value 4,824,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,442 Federal National Mortgage Association Pool 4.50% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,442,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 4,823,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,537 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,537,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 4,817,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,477 Federal National Mortgage Association Pool 4.00% 2042-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,477,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2042-04 [1],[3],[4],[5]  
Fair Value 4,760,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,446 Federal National Mortgage Association Pool 3.50% 2029-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,446,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2029-05 [1],[3],[4],[5]  
Fair Value 4,721,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,284 Government National Mortgage Association Pool 4.75% 2061-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,284,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.75% [1],[3],[4],[5]  
Maturity 2061-01 [1],[3],[4],[5]  
Fair Value 4,628,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,277 Federal National Mortgage Association Pool 4.00% 2026-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,277,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2026-07 [1],[3],[4],[5]  
Fair Value 4,546,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,030 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,030,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 4,502,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,111 Federal National Mortgage Association Pool 4.50% 2044-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,111,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-03 [1],[3],[4],[5]  
Fair Value 4,488,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,195 Federal National Mortgage Association Pool 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,195,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-11 [1],[3],[4],[5]  
Fair Value 4,471,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,156 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,156,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-06 [1],[3],[4],[5]  
Fair Value 4,422,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,005 Federal National Mortgage Association Pool 4.50% 2044-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,005,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-04 [1],[3],[4],[5]  
Fair Value 4,352,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,097 Federal Home Loan Mortgage Corporation Pool 3.50% 2029-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,097,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2029-02 [1],[3],[4],[5]  
Fair Value 4,343,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,952 Government National Mortgage Association Pool 4.69% 2061-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,952,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.69% [1],[3],[4],[5]  
Maturity 2061-07 [1],[3],[4],[5]  
Fair Value 4,311,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,837 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,837,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 4,299,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,183 Federal Home Loan Mortgage Corporation Pool 3.50% 2043-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,183,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2043-06 [1],[3],[4],[5]  
Fair Value 4,284,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,783 Federal National Mortgage Association Pool 5.00% 2044-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,783,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2044-01 [1],[3],[4],[5]  
Fair Value 4,273,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,827 Federal National Mortgage Association Pool 5.00% 2040-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,827,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2040-11 [1],[3],[4],[5]  
Fair Value 4,265,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,826 Federal National Mortgage Association Pool 5.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,826,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2043-11 [1],[3],[4],[5]  
Fair Value 4,257,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,868 Federal National Mortgage Association Pool 4.00% 2033-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,868,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2033-11 [1],[3],[4],[5]  
Fair Value 4,165,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,898 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,898,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 4,138,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,812 Government National Mortgage Association Pool 4.80% 2061-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,812,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.80% [1],[3],[4],[5]  
Maturity 2061-02 [1],[3],[4],[5]  
Fair Value 4,128,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,687 Federal National Mortgage Association Pool 5.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,687,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 4,119,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,694 Federal National Mortgage Association Pool 4.50% 2043-09 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,694,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-09 [1],[3],[4],[5]  
Fair Value 4,036,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,650 Federal Home Loan Mortgage Corporation Pool 4.50% 2044-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,650,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-06 [1],[3],[4],[5]  
Fair Value 3,955,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,565 Federal National Mortgage Association Pool 4.50% 2043-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,565,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-12 [1],[3],[4],[5]  
Fair Value 3,910,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,638 Federal National Mortgage Association Pool 4.00% 2044-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,638,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-05 [1],[3],[4],[5]  
Fair Value 3,880,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,571 Federal National Mortgage Association Pool 3.50% 2029-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,571,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2029-06 [1],[3],[4],[5]  
Fair Value 3,796,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,564 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,564,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 3,790,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,412 Government National Mortgage Association Pool 4.66% 2063-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,412,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.66% [1],[3],[4],[5]  
Maturity 2063-01 [1],[3],[4],[5]  
Fair Value 3,780,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,776 Federal National Mortgage Association Pool 3.00% 2043-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,776,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.00% [1],[3],[4],[5]  
Maturity 2043-03 [1],[3],[4],[5]  
Fair Value 3,736,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,467 Federal National Mortgage Association Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,467,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 3,687,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,375 Federal National Mortgage Association Pool 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,375,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 3,673,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,485 Federal Home Loan Mortgage Corporation Pool 3.00% 2028-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,485,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 3.00% [1],[3],[4],[5]  
Maturity 2028-03 [1],[3],[4],[5]  
Fair Value 3,617,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,643 Federal National Mortgage Association Pool 3.00% 2043-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,643,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.00% [1],[3],[4],[5]  
Maturity 2043-02 [1],[3],[4],[5]  
Fair Value 3,607,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,283 Government National Mortgage Association Pool 4.67% 2061-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,283,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.67% [1],[3],[4],[5]  
Maturity 2061-10 [1],[3],[4],[5]  
Fair Value 3,589,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,248 Federal National Mortgage Association Pool 4.50 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,248,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-10 [1],[3],[4],[5]  
Fair Value 3,542,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,014 Federal National Mortgage Association Pool 5.00% 2035-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,014,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2035-10 [1],[3],[4],[5]  
Fair Value 3,406,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,035 Federal National Mortgage Association Pool 5.00% 2040-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,035,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2040-12 [1],[3],[4],[5]  
Fair Value 3,392,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,271 Federal National Mortgage Association Pool 3.50% 2043-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,271,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2043-01 [1],[3],[4],[5]  
Fair Value 3,373,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,275 Federal Home Loan Mortgage Corporation Pool 3.00% 2028-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,275,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 3.00% [1],[3],[4],[5]  
Maturity 2028-06 [1],[3],[4],[5]  
Fair Value 3,366,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,159 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,159,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-05 [1],[3],[4],[5]  
Fair Value 3,363,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,071 Government National Mortgage Association Pool 4.68% 2061-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,071,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.68% [1],[3],[4],[5]  
Maturity 2061-10 [1],[3],[4],[5]  
Fair Value 3,354,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,959 Federal National Mortgage Association Pool 5.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 2,959,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.00% [1],[3],[4],[5]  
Maturity 2043-11 [1],[3],[4],[5]  
Fair Value 3,343,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,139 Federal Home Loan Mortgage Corporation Pool 4.00% 2044-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,139,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-04 [1],[3],[4],[5]  
Fair Value 3,341,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,008 Government National Mortgage Association Pool 5.54% 2060-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,008,000 [1],[3],[4],[5]  
Investment Owned Description Government National Mortgage Association Pool [1],[3],[4],[5]  
Rate 5.54% [1],[3],[4],[5]  
Maturity 2060-02 [1],[3],[4],[5]  
Fair Value 3,304,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,099 Federal Home Loan Mortgage Corporation Pool 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,099,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2043-08 [1],[3],[4],[5]  
Fair Value 3,300,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,974 Federal Home Loan Mortgage Corporation Pool 4.50% 2043-09 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 2,974,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2043-09 [1],[3],[4],[5]  
Fair Value 3,260,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,063 Federal National Mortgage Association Pool 4.00% 2026-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,063,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2026-06 [1],[3],[4],[5]  
Fair Value 3,259,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,050 Federal National Mortgage Association Pool 4.00% 2044-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,050,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2044-06 [1],[3],[4],[5]  
Fair Value 3,244,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,016 Federal National Mortgage Association Pool 4.00% 2033-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 3,016,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.00% [1],[3],[4],[5]  
Maturity 2033-12 [1],[3],[4],[5]  
Fair Value 3,243,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,966 Federal National Mortgage Association Pool 4.50% 2042-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 2,966,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2042-04 [1],[3],[4],[5]  
Fair Value 3,223,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,907 Federal National Mortgage Association Pool 4.50% 2044-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 2,907,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 4.50% [1],[3],[4],[5]  
Maturity 2044-05 [1],[3],[4],[5]  
Fair Value 3,179,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,973 Federal National Mortgage Association Pool 3.50% 2028-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 2,973,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association Pool [1],[3],[4],[5]  
Rate 3.50% [1],[3],[4],[5]  
Maturity 2028-11 [1],[3],[4],[5]  
Fair Value 3,160,000 [1],[3],[4],[5]  
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 154,289,000 [1],[3],[4],[5] 111,228,000 [1],[6],[7],[8]
Investment Owned Description Other Federal National Mortgage Association Pools [1],[3],[4],[5] Other Federal National Mortgage Association Pools [1],[6],[7],[8]
Fair Value 166,581,000 [1],[3],[4],[5] 115,792,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 3.00% [1],[3],[4],[5] 3.00% [1],[6],[7],[8]
Maturity 2028-09 [1],[3],[4],[5] 2028-06 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 6.00% [1],[3],[4],[5] 6.00% [1],[6],[7],[8]
Maturity 2044-07 [1],[3],[4],[5] 2044-01 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 99,122,000 [1],[3],[4],[5] 80,675,000 [1],[6],[7],[8]
Investment Owned Description Other Federal Home Loan Mortgage Corporation Pools [1],[3],[4],[5] Other Federal Home Loan Mortgage Corporation Pools [1],[6],[7],[8]
Fair Value 105,423,000 [1],[3],[4],[5] 81,716,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 3.00% [1],[3],[4],[5] 2.50% [1],[6],[7],[8]
Maturity 2028-09 [1],[3],[4],[5] 2028-09 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 6.00% [1],[3],[4],[5] 6.00% [1],[6],[7],[8]
Maturity 2044-07 [1],[3],[4],[5] 2043-12 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 8,213,000 [1],[3],[4],[5] 8,191,000 [1],[6],[7],[8]
Investment Owned Description Other Government National Mortgage Association Pools [1],[3],[4],[5] Other Government National Mortgage Association Pools [1],[6],[7],[8]
Fair Value 9,021,000 [1],[3],[4],[5] 8,949,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 4.49% [1],[3],[4],[5] 4.49% [1],[6],[7],[8]
Maturity 2061-11 [1],[3],[4],[5] 2061-11 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association Pools [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 4.68% [1],[3],[4],[5] 4.68% [1],[6],[7],[8]
Maturity 2062-11 [1],[3],[4],[5] 2062-11 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 38,439 Federal National Mortgage Association Pool, 3.50% 2043-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   38,439,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2043-01 [1],[6],[7],[8]
Fair Value   37,742,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 27,523 Federal National Mortgage Association Pool, 3.50% 2042-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   27,523,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2042-10 [1],[6],[7],[8]
Fair Value   27,407,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 17,735 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   17,735,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-11 [1],[6],[7],[8]
Fair Value   18,327,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 18,267 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   18,267,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2043-04 [1],[6],[7],[8]
Fair Value   17,322,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,538 Federal National Mortgage Association Pool, 5.00% 2041-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   15,538,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2041-08 [1],[6],[7],[8]
Fair Value   16,910,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 16,572 Federal National Mortgage Association Pool, 3.00% 2028-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   16,572,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2028-06 [1],[6],[7],[8]
Fair Value   16,729,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,759 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   15,759,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-11 [1],[6],[7],[8]
Fair Value   16,279,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 15,017 Federal National Mortgage Association Pool, 4.50% 2041-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   15,017,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2041-10 [1],[6],[7],[8]
Fair Value   15,958,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 14,835 Federal National Mortgage Association Pool, 4.50% 2041-09 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   14,835,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2041-09 [1],[6],[7],[8]
Fair Value   15,743,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 13,367 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   13,367,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   13,783,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,686 Federal Home Loan Mortgage Corporation Pool, 5.00% 2041-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   12,686,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2041-07 [1],[6],[7],[8]
Fair Value   13,692,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 12,316 Federal National Mortgage Association Pool, 5.00% 2041-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   12,316,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2041-03 [1],[6],[7],[8]
Fair Value   13,444,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,295 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   11,295,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   12,005,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,478 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   11,478,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   11,861,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 11,835 Federal National Mortgage Association Pool, 3.00% 2042-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   11,835,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2042-08 [1],[6],[7],[8]
Fair Value   11,263,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,697 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   9,697,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-07 [1],[6],[7],[8]
Fair Value   9,979,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,114 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   9,114,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   9,409,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,841 Federal Home Loan Mortgage Corporation Pool, 4.50% 2041-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   8,841,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2041-10 [1],[6],[7],[8]
Fair Value   9,378,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,025 Federal National Mortgage Association Pool, 4.00% 2043-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   9,025,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-12 [1],[6],[7],[8]
Fair Value   9,326,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 9,747 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   9,747,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2043-02 [1],[6],[7],[8]
Fair Value   9,251,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 8,789 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   8,789,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-11 [1],[6],[7],[8]
Fair Value   9,013,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,413 Federal National Mortgage Association Pool, 4.50% 2026-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   7,413,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2026-04 [1],[6],[7],[8]
Fair Value   7,898,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,893 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,893,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   7,326,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 7,327 Federal National Mortgage Association Pool, 3.50% 2042-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   7,327,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2042-11 [1],[6],[7],[8]
Fair Value   7,299,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,854 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,854,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   7,005,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,288 Federal National Mortgage Association Pool, 5.50% 2039-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,288,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.50% [1],[6],[7],[8]
Maturity   2039-10 [1],[6],[7],[8]
Fair Value   6,946,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,463 Federal National Mortgage Association Pool, 4.50% 2043-09 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,463,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-09 [1],[6],[7],[8]
Fair Value   6,865,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,033 Federal National Mortgage Association Pool, 4.50% 2043-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,033,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-12 [1],[6],[7],[8]
Fair Value   6,418,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,022 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,022,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   6,228,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,025 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,025,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   6,218,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,632 Government National Mortgage Association Pool, 4.46% 2063-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,632,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.46% [1],[6],[7],[8]
Maturity   2063-02 [1],[6],[7],[8]
Fair Value   6,136,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,893 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,893,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   6,083,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,342 Federal National Mortgage Association Pool, 3.00% 2042-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,342,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2042-04 [1],[6],[7],[8]
Fair Value   6,035,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 6,287 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,287,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2043-01 [1],[6],[7],[8]
Fair Value   5,967,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,410 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,410,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   5,925,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,702 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,702,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   5,867,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,361 Government National Mortgage Association Pool, 4.54% 2062-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,361,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.54% [1],[6],[7],[8]
Maturity   2062-11 [1],[6],[7],[8]
Fair Value   5,859,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,241 Government National Mortgage Association Pool, 4.58% 2062-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,241,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.58% [1],[6],[7],[8]
Maturity   2062-10 [1],[6],[7],[8]
Fair Value   5,733,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,234 Government National Mortgage Association Pool, 4.63% 2061-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,234,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.63% [1],[6],[7],[8]
Maturity   2061-06 [1],[6],[7],[8]
Fair Value   5,688,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,978 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,978,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2043-04 [1],[6],[7],[8]
Fair Value   5,676,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,189 Government National Mortgage Association Pool, 4.60% 2062-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,189,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.60% [1],[6],[7],[8]
Maturity   2062-06 [1],[6],[7],[8]
Fair Value   5,672,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,338 Federal National Mortgage Association Pool, 4.50% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,338,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-11 [1],[6],[7],[8]
Fair Value   5,668,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,274 Federal National Mortgage Association Pool, 4.00% 2026-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,274,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2026-07 [1],[6],[7],[8]
Fair Value   5,593,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,147 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,147,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   5,460,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,130 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,130,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   5,442,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,904 Federal National Mortgage Association Pool, 4.00% 2043-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,904,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-01 [1],[6],[7],[8]
Fair Value   5,063,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,484 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,484,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   4,897,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,720 Federal National Mortgage Association Pool, 4.00% 2042-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,720,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2042-04 [1],[6],[7],[8]
Fair Value   4,873,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 5,032 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   5,032,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2043-06 [1],[6],[7],[8]
Fair Value   4,776,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,472 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,472,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   4,768,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,604 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,604,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-11 [1],[6],[7],[8]
Fair Value   4,758,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,477 Federal National Mortgage Association Pool, 4.50% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,477,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   4,754,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,581 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,581,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   4,715,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,359 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-09 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,359,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-09 [1],[6],[7],[8]
Fair Value   4,625,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,604 Federal National Mortgage Association Pool, 3.50% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,604,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   4,586,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,673 Federal Home Loan Mortgage Corporation Pool, 3.00% 2043-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,673,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2043-02 [1],[6],[7],[8]
Fair Value   4,435,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,060 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,060,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   4,423,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,025 Federal National Mortgage Association Pool, 5.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,025,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   4,387,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,231 Federal National Mortgage Association Pool, 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,231,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-11 [1],[6],[7],[8]
Fair Value   4,372,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,932 Government National Mortgage Association Pool, 4.69% 2061-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,932,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.69% [1],[6],[7],[8]
Maturity   2061-07 [1],[6],[7],[8]
Fair Value   4,288,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,886 Government National Mortgage Association Pool, 4.75% 2061-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,886,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.75% [1],[6],[7],[8]
Maturity   2061-01 [1],[6],[7],[8]
Fair Value   4,213,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,864 Federal National Mortgage Association Pool, 5.00% 2040-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,864,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2040-11 [1],[6],[7],[8]
Fair Value   4,203,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,811 Federal National Mortgage Association Pool, 5.00% 2044-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,811,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2044-01 [1],[6],[7],[8]
Fair Value   4,169,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,826 Government National Mortgage Association Pool, 4.80% 2061-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,826,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.80% [1],[6],[7],[8]
Maturity   2061-02 [1],[6],[7],[8]
Fair Value   4,157,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 4,225 Federal Home Loan Mortgage Corporation Pool, 3.50% 2043-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,225,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2043-06 [1],[6],[7],[8]
Fair Value   4,137,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,929 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,929,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   4,043,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,801 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,801,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-11 [1],[6],[7],[8]
Fair Value   3,885,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,599 Federal National Mortgage Association Pool, 4.50% 2043-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,599,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-12 [1],[6],[7],[8]
Fair Value   3,837,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,737 Federal Home Loan Mortgage Corporation Pool, 3.00% 2028-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,737,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2028-03 [1],[6],[7],[8]
Fair Value   3,810,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,434 Government National Mortgage Association Pool, 4.66% 2063-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,434,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.66% [1],[6],[7],[8]
Maturity   2063-01 [1],[6],[7],[8]
Fair Value   3,772,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,448 Federal National Mortgage Association Pool, 5.00% 2040-12 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,448,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2040-12 [1],[6],[7],[8]
Fair Value   3,759,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,601 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,601,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   3,715,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,594 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,594,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   3,710,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,566 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,566,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   3,683,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,400 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,400,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   3,613,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,495 Federal National Mortgage Association Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,495,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   3,608,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,273 Federal National Mortgage Association Pool, 4.50% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,273,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   3,479,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,515 Federal Home Loan Mortgage Corporation Pool, 3.50% 2043-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,515,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2043-06 [1],[6],[7],[8]
Fair Value   3,454,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,111 Federal National Mortgage Association Pool, 5.00% 2035-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,111,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2035-10 [1],[6],[7],[8]
Fair Value   3,429,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,134 Government National Mortgage Association Pool, 4.68% 2061-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,134,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.68% [1],[6],[7],[8]
Maturity   2061-10 [1],[6],[7],[8]
Fair Value   3,421,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,094 Government National Mortgage Association Pool, 5.54% 2060-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,094,000 [1],[6],[7],[8]
Investment Owned Description   Government National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.54% [1],[6],[7],[8]
Maturity   2060-02 [1],[6],[7],[8]
Fair Value   3,420,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,469 Federal National Mortgage Association Pool, 3.50% 2042-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,469,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2042-06 [1],[6],[7],[8]
Fair Value   3,419,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,387 Federal Home Loan Mortgage Corporation Pool, 3.00% 2028-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,387,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2028-06 [1],[6],[7],[8]
Fair Value   3,412,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,421 Federal National Mortgage Association Pool, 3.50% 2043-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,421,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2043-01 [1],[6],[7],[8]
Fair Value   3,407,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,170 Federal National Mortgage Association Pool, 4.00% 2026-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,170,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2026-06 [1],[6],[7],[8]
Fair Value   3,362,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,200 Federal National Mortgage Association Pool, 3.50% 2028-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,200,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.50% [1],[6],[7],[8]
Maturity   2028-11 [1],[6],[7],[8]
Fair Value   3,355,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,194 Federal Home Loan Mortgage Corporation Pool, 4.00% 2043-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,194,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-08 [1],[6],[7],[8]
Fair Value   3,294,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,203 Federal National Mortgage Association Pool, 3.00% 2028-06 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,203,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2028-06 [1],[6],[7],[8]
Fair Value   3,274,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,981 Federal National Mortgage Association Pool, 5.00% 2043-11 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,981,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2043-11 [1],[6],[7],[8]
Fair Value   3,261,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,218 Federal National Mortgage Association Pool, 3.00% 2028-03 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,218,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2028-03 [1],[6],[7],[8]
Fair Value   3,249,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,142 Federal National Mortgage Association Pool, 4.00% 2043-10 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,142,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.00% [1],[6],[7],[8]
Maturity   2043-10 [1],[6],[7],[8]
Fair Value   3,247,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 3,124 Federal National Mortgage Association Pool, 3.00% 2028-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,124,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2028-07 [1],[6],[7],[8]
Fair Value   3,193,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,998 Federal Home Loan Mortgage Corporation Pool, 4.50% 2043-09 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,998,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2043-09 [1],[6],[7],[8]
Fair Value   3,191,000 [1],[6],[7],[8]
Principal And Interest - Fixed Rate Agency Securities [Member] | 2,996 Federal National Mortgage Association Pool, 4.50% 2042-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   2,996,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.50% [1],[6],[7],[8]
Maturity   2042-04 [1],[6],[7],[8]
Fair Value   3,182,000 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 2.39% [1],[2],[3],[4],[5] 3.06% [1],[2],[6],[7],[8]
Fair Value 15,099,000 [1],[3],[4],[5] 19,132,000 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 73,382,000 [1],[3],[4],[5] 97,796,000 [1],[6],[7],[8]
Investment Owned Description Other Federal National Mortgage Association [1],[3],[4],[5] Other Federal National Mortgage Association [1],[6],[7],[8]
Fair Value 9,693,000 [1],[3],[4],[5] 13,821,000 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 3.00% [1],[3],[4],[5] 3.00% [1],[6],[7],[8]
Maturity 2020-12 [1],[3],[4],[5] 2020-12 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 5.50% [1],[3],[4],[5] 5.50% [1],[6],[7],[8]
Maturity 2043-06 [1],[3],[4],[5] 2043-06 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 26,278,000 [1],[3],[4],[5] 21,959,000 [1],[6],[7],[8]
Investment Owned Description Other Federal Home Loan Mortgage Corporation [1],[3],[4],[5] Other Federal Home Loan Mortgage Corporation [1],[6],[7],[8]
Fair Value 3,856,000 [1],[3],[4],[5] 3,577,000 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 3.00% [1],[3],[4],[5] 3.00% [1],[6],[7],[8]
Maturity 2032-12 [1],[3],[4],[5] 2032-12 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 5.50% [1],[3],[4],[5] 5.50% [1],[6],[7],[8]
Maturity 2043-01 [1],[3],[4],[5] 2043-01 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 9,752,000 [1],[3],[4],[5] 10,460,000 [1],[6],[7],[8]
Investment Owned Description Other Government National Mortgage Association [1],[3],[4],[5] Other Government National Mortgage Association [1],[6],[7],[8]
Fair Value 1,550,000 [1],[3],[4],[5] 1,734,000 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 3.00% [1],[3],[4],[5] 3.00% [1],[6],[7],[8]
Maturity 2040-07 [1],[3],[4],[5] 2036-03 [1],[6],[7],[8]
Interest Only - Fixed Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 4.75% [1],[3],[4],[5] 5.50% [1],[6],[7],[8]
Maturity 2042-11 [1],[3],[4],[5] 2042-11 [1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 21.29% [1],[2],[3],[4],[5] 15.47% [1],[2],[6],[7],[8]
Current Principal/Notional Amount 136,038,000 101,150,000
Fair Value 134,347,000 [1],[3],[4],[5] 96,856,000 [1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | Federal National Mortgage Association (30 Year) [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 102,718,000 [1],[3],[4],[5]  
Investment Owned Description Federal National Mortgage Association (30 Year) [1],[3],[4],[5]  
Rate 3.00% [1],[3],[4],[5]  
Maturity 2014-07 [1],[3],[4],[5]  
Fair Value 101,482,000 [1],[3],[4],[5]  
TBA - Fixed Rate Agency Securities [Member] | Federal Home Loan Mortgage Corporation (30 Year) [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 33,320,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation (30 Year) [1],[3],[4],[5]  
Rate 3.00% [1],[3],[4],[5]  
Maturity 2014-07 [1],[3],[4],[5]  
Fair Value 32,865,000 [1],[3],[4],[5]  
TBA - Fixed Rate Agency Securities [Member] | 63,300 Federal Home Loan Mortgage Corporation (30 Year) 3.00% 2014-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   63,300,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation (30 Year) [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2014-01 [1],[6],[7],[8]
Fair Value   60,016,000 [1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | 31,150 Federal National Mortgage Association (30 Year) 3.00% 2014-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   31,150,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association (30 Year) [1],[6],[7],[8]
Rate   3.00% [1],[6],[7],[8]
Maturity   2014-01 [1],[6],[7],[8]
Fair Value   29,612,000 [1],[6],[7],[8]
TBA - Fixed Rate Agency Securities [Member] | 6,700 Federal Home Loan Mortgage Corporation (30 Year) 5.00% 2014-01 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,700,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation (30 Year) [1],[6],[7],[8]
Rate   5.00% [1],[6],[7],[8]
Maturity   2014-01 [1],[6],[7],[8]
Fair Value   7,228,000 [1],[6],[7],[8]
Fixed Rate Agency Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 166.43% [1],[2],[3],[4],[5] 156.28% [1],[2],[6],[7],[8]
Fair Value 1,050,408,000 [1],[3],[4],[5] 978,356,000 [1],[6],[7],[8]
Investment Owned, at Cost 1,036,869,000 [1],[3],[4],[5] 992,207,000 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 3.90% [1],[2],[3],[4],[5] 4.89% [1],[2],[6],[7],[8]
Fair Value 24,592,000 [1],[3],[4],[5] 30,618,000 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 7,574,000 [1],[3],[4],[5] 3,667,000 [1],[6],[7],[8]
Investment Owned Description Other Federal National Mortgage Association Pools [1],[3],[4],[5] Other Federal National Mortgage Association Pools [1],[6],[7],[8]
Fair Value 8,091,000 [1],[3],[4],[5] 3,900,000 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 4.73% [1],[3],[4],[5] 2.64% [1],[6],[7],[8]
Maturity 2035-09 [1],[3],[4],[5] 2036-04 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association Pools [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 6.05% [1],[3],[4],[5] 6.05% [1],[6],[7],[8]
Maturity 2037-09 [1],[3],[4],[5] 2037-09 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 4,921,000 [1],[3],[4],[5] 3,148,000 [1],[6],[7],[8]
Investment Owned Description Other Federal Home Loan Mortgage Corporation Pools [1],[3],[4],[5] Other Federal Home Loan Mortgage Corporation Pools [1],[6],[7],[8]
Fair Value 5,186,000 [1],[3],[4],[5] 3,341,000 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 3.32% [1],[3],[4],[5] 5.83% [1],[6],[7],[8]
Maturity 2037-06 [1],[3],[4],[5] 2037-06 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation Pools [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 5.90% [1],[3],[4],[5] 5.89% [1],[6],[7],[8]
Maturity 2044-05 [1],[3],[4],[5] 2037-07 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 5,695 Federal Home Loan Mortgage Corporation Pool 3.22% 2044-02 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,695,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 3.22% [1],[3],[4],[5]  
Maturity 2044-02 [1],[3],[4],[5]  
Fair Value 5,884,000 [1],[3],[4],[5]  
Principal And Interest - Floating Rate Agency Securities [Member] | 5,087 Federal Home Loan Mortgage Corporation Pool 4.92% 2038-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,087,000 [1],[3],[4],[5]  
Investment Owned Description Federal Home Loan Mortgage Corporation Pool [1],[3],[4],[5]  
Rate 4.92% [1],[3],[4],[5]  
Maturity 2038-04 [1],[3],[4],[5]  
Fair Value 5,431,000 [1],[3],[4],[5]  
Principal And Interest - Floating Rate Agency Securities [Member] | 6,281 Federal Home Loan Mortgage Corporation Pool, 4.92% 2038-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   6,281,000 [1],[6],[7],[8]
Investment Owned Description   Federal Home Loan Mortgage Corporation Pool [1],[6],[7],[8]
Rate   4.92% [1],[6],[7],[8]
Maturity   2038-04 [1],[6],[7],[8]
Fair Value   6,709,000 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 4,935 Federal National Mortgage Association Pool, 4.27% 2040-04 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   4,935,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   4.27% [1],[6],[7],[8]
Maturity   2040-04 [1],[6],[7],[8]
Fair Value   5,256,000 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,674 Federal National Mortgage Association Pool, 5.73% 2037-07 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,674,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   5.73% [1],[6],[7],[8]
Maturity   2037-07 [1],[6],[7],[8]
Fair Value   3,937,000 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,646 Federal National Mortgage Association Pool, 2.53% 2038-05 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,646,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   2.53% [1],[6],[7],[8]
Maturity   2038-05 [1],[6],[7],[8]
Fair Value   3,878,000 [1],[6],[7],[8]
Principal And Interest - Floating Rate Agency Securities [Member] | 3,395 Federal National Mortgage Association Pool, 6.1% 2037-08 [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount   3,395,000 [1],[6],[7],[8]
Investment Owned Description   Federal National Mortgage Association Pool [1],[6],[7],[8]
Rate   6.10% [1],[6],[7],[8]
Maturity   2037-08 [1],[6],[7],[8]
Fair Value   3,597,000 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 3.35% [1],[2],[3],[4],[5] 3.41% [1],[2],[6],[7],[8]
Fair Value 21,141,000 [1],[3],[4],[5] 21,372,000 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 23,544,000 [1],[3],[4],[5] 25,322,000 [1],[6],[7],[8]
Investment Owned Description Other Federal National Mortgage Association [1],[3],[4],[5] Other Federal National Mortgage Association [1],[6],[7],[8]
Fair Value 4,248,000 [1],[3],[4],[5] 4,600,000 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 5.50% [1],[3],[4],[5] 5.50% [1],[6],[7],[8]
Maturity 2036-08 [1],[3],[4],[5] 2036-08 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal National Mortgage Association [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 6.60% [1],[3],[4],[5] 6.59% [1],[6],[7],[8]
Maturity 2043-07 [1],[3],[4],[5] 2043-07 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 16,178,000 [1],[3],[4],[5] 18,180,000 [1],[6],[7],[8]
Investment Owned Description Other Federal Home Loan Mortgage Corporation [1],[3],[4],[5] Other Federal Home Loan Mortgage Corporation [1],[6],[7],[8]
Fair Value 1,951,000 [1],[3],[4],[5] 2,433,000 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 5.85% [1],[3],[4],[5] 5.83% [1],[6],[7],[8]
Maturity 2038-11 [1],[3],[4],[5] 2038-11 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Federal Home Loan Mortgage Corporation [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 6.55% [1],[3],[4],[5] 6.53% [1],[6],[7],[8]
Maturity 2039-08 [1],[3],[4],[5] 2039-08 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 118,995,000 [1],[3],[4],[5] 108,194,000 [1],[6],[7],[8]
Investment Owned Description Other Government National Mortgage Association [1],[3],[4],[5] Other Government National Mortgage Association [1],[6],[7],[8]
Fair Value 12,674,000 [1],[3],[4],[5] 11,987,000 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 1.65% [1],[3],[4],[5] 1.64% [1],[6],[7],[8]
Maturity 2042-11 [1],[3],[4],[5] 2042-11 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Other Government National Mortgage Association [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 6.60% [1],[3],[4],[5] 6.58% [1],[6],[7],[8]
Maturity 2063-08 [1],[3],[4],[5] 2063-08 [1],[6],[7],[8]
Interest Only - Floating Rate Agency Securities [Member] | Resecuritization of Government National Mortgage Association [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 21,851,000 [1],[3],[4],[5],[9] 22,796,000 [1],[6],[7],[8],[9]
Investment Owned Description Resecuritization of Government National Mortgage Association (x) [1],[3],[4],[5],[9] Resecuritization of Government National Mortgage Association (t) [1],[6],[7],[8],[9]
Rate 4.35% [1],[3],[4],[5],[9] 4.34% [1],[6],[7],[8],[9]
Maturity 2060-08 [1],[3],[4],[5],[9] 2060-08 [1],[6],[7],[8],[9]
Fair Value 2,268,000 [1],[3],[4],[5],[9] 2,352,000 [1],[6],[7],[8],[9]
Floating Rate Agency Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 7.25% [1],[2],[3],[4],[5] 8.30% [1],[2],[6],[7],[8]
Fair Value 45,733,000 [1],[3],[4],[5] 51,990,000 [1],[6],[7],[8]
Investment Owned, at Cost 44,292,000 [1],[3],[4],[5] 50,969,000 [1],[6],[7],[8]
Agency Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 173.68% [1],[2],[3],[4],[5] 164.58% [1],[2],[6],[7],[8]
Fair Value 1,096,141,000 [1],[3],[4],[5] 1,030,346,000 [1],[6],[7],[8]
Investment Owned, at Cost 1,081,161,000 [1],[3],[4],[5] 1,043,176,000 [1],[6],[7],[8]
Principal And Interest - Private Label Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 80.74% [1],[2],[3],[4] 97.40% [1],[2],[6],[7]
Fair Value 509,540,000 [1],[3],[4] 609,766,000 [1],[6],[7]
Investment Owned, at Cost 465,617,000 [1],[3],[4] 555,708,000 [1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 803,591,000 [1],[3],[4] 920,032,000 [1],[6],[7]
Investment Owned Description Various [1],[3],[4] Various [1],[6],[7]
Fair Value 509,540,000 [1],[3],[4] 609,766,000 [1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 0.00% [1],[3],[4] 0.24% [1],[6],[7]
Maturity 2017-06 [1],[3],[4] 2019-05 [1],[6],[7]
Principal And Interest - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 12.25% [1],[3],[4] 9.35% [1],[6],[7]
Maturity 2048-12 [1],[3],[4] 2050-06 [1],[6],[7]
Principal Only - Private Label Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 0.51% [1],[2],[3],[4] 0.45% [1],[2],[6],[7]
Fair Value 3,190,000 [1],[3],[4] 2,784,000 [1],[6],[7]
Investment Owned, at Cost 2,605,000 [1],[3],[4] 2,477,000 [1],[6],[7]
Principal Only - Private Label Securities [Member] | Various Issuer [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 5,800,000 [1],[3],[4] 5,800,000 [1],[6],[7]
Investment Owned Description Various [1],[3],[4] Various [1],[6],[7]
Rate 0.00% [1],[3],[4] 0.00% [1],[6],[7]
Maturity 2030-08 [1],[3],[4] 2030-08 [1],[6],[7]
Fair Value 3,190,000 [1],[3],[4] 2,784,000 [1],[6],[7]
Interest Only - Private Label Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 0.19% [1],[2],[3],[4] 0.19% [1],[2],[6],[7]
Fair Value 1,219,000 [1],[3],[4] 1,216,000 [1],[6],[7]
Investment Owned, at Cost 485,000 [1],[3],[4] 519,000 [1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 48,811,000 [1],[3],[4] 50,649,000 [1],[6],[7]
Investment Owned Description Various [1],[3],[4] Various [1],[6],[7]
Fair Value 1,219,000 [1],[3],[4] 1,216,000 [1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 0.50% [1],[3],[4] 0.50% [1],[6],[7]
Maturity 2044-06 [1],[3],[4] 2044-06 [1],[6],[7]
Interest Only - Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 2.00% [1],[3],[4] 2.00% [1],[6],[7]
Maturity 2047-09 [1],[3],[4] 2047-09 [1],[6],[7]
Other Private Label Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 0.00% [1],[2],[3],[4] 0.00% [1],[2],[6],[7]
Fair Value 0 [1],[3],[4] 0 [1],[6],[7]
Investment Owned, at Cost 325,000 [1],[3],[4] 345,000 [1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 119,812,000 [1],[3],[4] 127,491,000 [1],[6],[7]
Investment Owned Description Various [1],[3],[4] Various [1],[6],[7]
Rate 0.00% [1],[3],[4] 0.00% [1],[6],[7]
Fair Value 0 [1],[3],[4] 0 [1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Maturity 2037-06 [1],[3],[4] 2037-06 [1],[6],[7]
Other Private Label Securities [Member] | Various Issuer [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Maturity 2047-06 [1],[3],[4] 2045-07 [1],[6],[7]
Private Label Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 81.44% [1],[2],[3],[4] 98.04% [1],[2],[6],[7]
Fair Value 513,949,000 [1],[3],[4] 613,766,000 [1],[6],[7]
Investment Owned, at Cost 469,032,000 [1],[3],[4] 559,049,000 [1],[6],[7]
Mortgage-Backed Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 255.12% [1],[2],[3],[4] 262.62% [1],[2],[6],[7]
Fair Value 1,610,090,000 [1],[3],[4] 1,644,112,000 [1],[6],[7]
Investment Owned, at Cost 1,550,193,000 [1],[3],[4] 1,602,225,000 [1],[6],[7]
Other Asset-backed Securities [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 12.88% [1],[2],[3],[4] 6.08% [1],[2],[6],[7]
Fair Value 81,315,000 [1],[3],[4] 38,069,000 [1],[6],[7]
Investment Owned, at Cost 81,949,000 [1],[3],[4] 38,758,000 [1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 93,569,000 [1],[3],[4] 42,822,000 [1],[6],[7]
Investment Owned Description Various [1],[3],[4] Various [1],[6],[7]
Fair Value 81,315,000 [1],[3],[4] 38,069,000 [1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 0.00% [1],[3],[4] 0.00% [1],[6],[7]
Maturity 2017-05 [1],[3],[4] 2017-06 [1],[6],[7]
Other Asset-backed Securities [Member] | Various Issuer [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 9.72% [1],[3],[4] 9.74% [1],[6],[7]
Maturity 2022-04 [1],[3],[4] 2040-12 [1],[6],[7]
Commercial Mortgage Loans [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 5.93% [1],[10],[2],[3],[4] 3.82% [1],[11],[2],[6],[7]
Fair Value 37,415,000 [1],[10],[3],[4] 23,887,000 [1],[11],[6],[7]
Investment Owned, at Cost 37,031,000 [1],[10],[3],[4] 23,212,000 [1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 41,726,000 [1],[10],[3],[4] 26,227,000 [1],[11],[6],[7]
Investment Owned Description Various [1],[10],[3],[4] Various [1],[11],[6],[7]
Fair Value 37,415,000 [1],[10],[3],[4] 23,887,000 [1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Rate 0.00% [1],[10],[3],[4] 0.00% [1],[11],[6],[7]
Maturity 2014-06 [1],[10],[3],[4] 2014-06 [1],[11],[6],[7]
Commercial Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Rate 8.42% [1],[10],[3],[4] 7.25% [1],[11],[6],[7]
Maturity 2016-12 [1],[10],[3],[4] 2016-12 [1],[11],[6],[7]
Residential Mortgage Loans [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 3.70% [1],[2],[3],[4] 3.84% [1],[2],[6],[7]
Fair Value 23,371,000 [1],[3],[4] 24,062,000 [1],[6],[7]
Investment Owned, at Cost 22,417,000 [1],[3],[4] 24,062,000 [1],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 33,368,000 [1],[3],[4] 36,218,000 [1],[6],[7]
Investment Owned Description Various [1],[3],[4] Various [1],[6],[7]
Rate 0.00% [1],[3],[4] 0.00% [1],[6],[7]
Fair Value 23,371,000 [1],[3],[4] 24,062,000 [1],[6],[7]
Residential Mortgage Loans [Member] | Various Issuer [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Maturity 2018-02 [1],[3],[4] 2024-08
Residential Mortgage Loans [Member] | Various Issuer [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Maturity 2054-05 [1],[3],[4] 2042-10
Residential Real Estate [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 0.26% [1],[12],[2],[3],[4]  
Fair Value 1,641,000 [1],[12],[3],[4]  
Investment Owned, at Cost 1,658,000 [1],[12],[3],[4]  
Residential Real Estate [Member] | Single-Family Houses [Member]
    
Schedule of Investments [Line Items]    
Current Principal/Notional Amount 13 [1],[12],[3],[4]  
Investment Owned Description Single-Family Houses [1],[12],[3],[4]  
Fair Value 1,641,000 [1],[12],[3],[4]  
Long Investments [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 277.89% [1],[2],[3],[4] 276.36% [1],[2],[6],[7]
Current Principal/Notional Amount 2,433,774,000 2,478,291,000
Fair Value 1,753,832,000 [1],[3],[4] 1,730,130,000 [1],[6],[7]
Investment Owned, at Cost 1,693,248,000 [1],[3],[4] 1,688,257,000 [1],[6],[7]
Long Investments [Member] | North America [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 272.57% 275.44%
Current Principal/Notional Amount 2,396,102,000 2,470,650,000
Fair Value 1,720,243,000 1,724,370,000
Investment Owned, at Cost 1,661,026,000 1,682,533,000
Long Investments [Member] | Europe [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 5.32% 0.92%
Current Principal/Notional Amount 37,672,000 7,641,000
Fair Value 33,589,000 5,760,000
Investment Owned, at Cost 32,222,000 5,724,000
Long Investments [Member] | Federal National Mortgage Association [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 116.25% 100.85%
Long Investments [Member] | Federal Home Loan Mortgage Corporation [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 45.39% 51.37%
Long Investments [Member] | Government National Mortgage Association [Member]
    
Schedule of Investments [Line Items]    
Investment owned as a percentage of equity 12.04% 12.36%
Commercial Mortgage Loan With Extendable Maturity [Member] | Commercial Mortgage Loans [Member] | Various Issuer [Member]
    
Schedule of Investments [Line Items]    
Fair Value   $ 5,000,000
[1] See Note 2 and Note 3 in Notes to Consolidated Financial Statements.
[2] Classification percentages are based on Total Equity.
[3] The following table details the breakout by geographical region of long investments, investments sold short, repurchase agreements, and financial derivatives–assets. All financial derivatives–liabilities were concentrated in North America.Region Current Principal/Notional Value/Number of Shares/Number of Properties Cost/(Proceeds) Fair Value Percent ofEquityLong Investments: (In thousands, Expressed in U.S. Dollars) North America 2,396,102 $1,661,026 $1,720,243 272.57 %Europe 37,672 32,222 33,589 5.32 %Total 2,433,774 $1,693,248 $1,753,832 277.89 %Investments Sold Short: North America (TBAs and Government Debt) (755,647) $(797,149) $(802,666) (127.18)%Europe (Government Debt) (22,062) (23,143) (24,457) (3.88)%North America (Common Stock) (2,387) (25,925) (25,723) (4.08)%Total $(846,217) $(852,846) (135.13)%Repurchase Agreements: North America 4,969 $4,969 $4,969 0.79 %Europe 25,568 25,568 25,568 4.05 %Total 30,537 $30,537 $30,537 4.84 %Financial Derivatives–Assets: North America 92,115 $54,200 $59,458 9.42 %Europe (9,211) — 12 — %Total 82,904 $54,200 $59,470 9.42 %
[4] The table below shows the Company's long investment ratings from Moody's, Standard and Poor's, or Fitch, as well as the Company's long investments that were unrated but guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, or the Government National Mortgage Association. Ratings tend to be a lagging credit indicator; as a result, the credit quality of the Company's long investment holdings may be lower than the credit quality implied based on the ratings listed below. In situations where an investment has a split rating, the lowest provided rating is used. The ratings descriptions include ratings qualified with a "+," "-," "1," "2," or "3."Rating Description Percent of EquityUnrated but Agency-Guaranteed 173.68%A/A/A 0.03%Baa/BBB/BBB 3.57%Ba/BB/BB or below 83.28%Unrated 17.33%
[5] At June 30, 2014, the Company's long investments guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association, represented 116.25%, 45.39%, and 12.04% of equity, respectively.
[6] The table below shows the ratings on the Company's long investments from Moody's, Standard and Poor's, or Fitch, as well as the Company's long investments that were unrated but guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, or the Government National Mortgage Association. Ratings tend to be a lagging credit indicator; as a result, the credit quality of the Company's long investment holdings may be lower than the credit quality implied based on the ratings listed below. In situations where an investment has a split rating, the lowest provided rating is used. The ratings descriptions include ratings qualified with a "+," "-," "1," "2," or "3."Rating Description Percent ofEquityUnrated but Agency-Guaranteed 164.58%A/A/A 0.34%Baa/BBB/BBB 2.97%Ba/BB/BB or below 97.95%Unrated 10.52%
[7] The following table details the breakout by geographical region of long investments, investments sold short, and repurchase agreements. All financial derivatives were concentrated in North America.Region Current Principal/Number of Shares Cost/(Proceeds) Fair Value Percent ofEquityLong Investments: (In thousands, Expressed in U.S. Dollars) North America 2,470,650 $1,682,533 $1,724,370 275.44 %Europe 7,641 5,724 5,760 0.92 %Total 2,478,291 $1,688,257 $1,730,130 276.36 %Investments Sold Short: North America (TBAs and Government Debt) (804,888) $(833,656) $(831,564) (132.82)%Europe (Government Debt) (7,337) (7,633) (7,681) (1.23)%North America (Common Stock) (763) (6,313) (6,369) (1.02)%Total $(847,602) $(845,614) (135.07)%Repurchase Agreements: North America 19,675 $19,675 $19,675 3.15 %Europe 8,287 8,268 8,287 1.32 %Total 27,962 $27,943 $27,962 4.47 %
[8] At December 31, 2013, the Company's long investments guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association, represented 100.85%, 51.37%, and 12.36% of equity, respectively.
[9] Private trust 100% backed by interest in Government National Mortgage Association collateralized mortgage obligation certificates.
[10] Includes non-performing commercial loans in the amount of $17.1 million whereby principal and/or interest is past due and a maturity date is not applicable.
[11] Includes a loan with a fair value in the amount of $5.0 million where the maturity date may be extended through November 4, 2015 as well as non-performing commercial mortgage loans.
[12] Number of properties not shown in thousands, represents actual number of properties owned.