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AGENCY MORTGAGE-BACKED SECURITIES (Tables)
12 Months Ended
Dec. 31, 2012
Schedule of Available-for-sale Securities Reconciliation
The following tables present the Company’s available-for-sale Agency mortgage-backed securities portfolio as of December 31, 2012 and 2011 which were carried at their fair value:

 
December 31, 2012
 
Freddie Mac
   
Fannie Mae
   
Ginnie Mae
   
Total Mortgage-
Backed Securities
 
   
(dollars in thousands)
 
                         
Agency mortgage-backed securities, par value
  $ 44,296,234     $ 70,649,782     $ 273,988     $ 115,220,004  
Unamortized discount
    (9,515 )     (12,315 )     (389 )     (22,219 )
Unamortized premium
    2,121,478       3,695,381       39,348       5,856,207  
Amortized cost
    46,408,197       74,332,848       312,947       121,053,992  
                                 
Gross unrealized gains
    1,166,299       1,913,334       17,583       3,097,216  
Gross unrealized losses
    (36,890 )     (146,533 )     (4,578 )     (188,001 )
                                 
Estimated fair value
  $ 47,537,606     $ 76,099,649     $ 325,952     $ 123,963,207  
 
   
Amortized Cost
   
Gross Unrealized
 Gain
   
Gross Unrealized
 Loss
   
Estimated Fair
Value
 
   
(dollars in thousands)
 
                         
Adjustable rate
  $ 5,786,718     $ 259,013     $ (4,613 )   $ 6,041,118  
Fixed rate
    115,267,274       2,838,203       (183,388 )     117,922,089  
                                 
Total
  $ 121,053,992     $ 3,097,216     $ (188,001 )   $ 123,963,207  
 
 
December 31, 2011
 
Freddie Mac
   
Fannie Mae
   
Ginnie Mae
   
Total Mortgage-
Backed Securities
 
   
(dollars in thousands)
 
                         
Agency mortgage-backed securities, par value
  $ 34,395,542     $ 63,066,372     $ 500,968     $ 97,962,882  
Unamortized discount
    (9,874 )     (13,632 )     (399 )     (23,905 )
Unamortized premium
    1,139,881       2,205,138       15,949       3,360,968  
Amortized cost
    35,525,549       65,257,878       516,518       101,299,945  
                                 
Gross unrealized gains
    973,476       2,081,282       31,474       3,086,232  
Gross unrealized losses
    (15,243 )     (118,871 )     (1,008 )     (135,122 )
                                 
Estimated fair value
  $ 36,483,782     $ 67,220,289     $ 546,984     $ 104,251,055  
 
   
Amortized Cost
   
Gross Unrealized
 Gain
   
Gross Unrealized
 Loss
   
Estimated Fair
Value
 
   
(dollars in thousands)
 
                         
Adjustable rate
  $ 8,698,746     $ 345,642     $ (3,188 )   $ 9,041,200  
Fixed rate
    92,601,199       2,740,590       (131,934 )     95,209,855  
                                 
Total
  $ 101,299,945     $ 3,086,232     $ (135,122 )   $ 104,251,055  
Schedule of Agency Mortgage Backed Securities by Estimated Weighted Average Life Classification
The following table summarizes the Company’s Agency Mortgage-Backed Securities on December 31, 2012 and 2011, according to their estimated weighted-average life classifications:
 
   
December 31, 2012
   
December 31, 2011
 
Weighted-Average Life
 
Fair Value
   
Amortized
Cost
   
Fair Value
   
Amortized
Cost
 
   
(dollars in thousands)
 
Less than one year
  $ 1,264,094     $ 1,250,405     $ 1,715,530     $ 1,697,101  
Greater than one year through five years
    119,288,168       116,510,310       97,344,791       94,534,782  
Greater than five years through ten years
    3,104,073       2,992,054       4,447,540       4,348,841  
Greater than ten years
    306,872       301,223       743,194       719,221  
                                 
Total
  $ 123,963,207     $ 121,053,992     $ 104,251,055     $ 101,299,945  
Schedule of Continuous Unrealized Loss Position
The following table presents the gross unrealized losses and estimated fair value of the Company’s Agency mortgage-backed securities by length of time that such securities have been in a continuous unrealized loss position at December 31, 2012 and December 31, 2011.

   
Unrealized Loss Position For:
 (dollars in thousands)
 
    Less than 12 Months     12 Months or More     Total  
December 31,
 
Estimated
Fair Value
   
Unrealized
Losses
   
Number
of 
Securities
   
Estimated
Fair Value
   
Unrealized
Losses
   
Number
of
Securities
   
Estimated
Fair Value
   
Unrealized
Losses
   
Number
of
Securities
 
                         
2012
  $ 11,220,514     $ (82,721 )     187     $ 147,775     $ (105,280 )     39     $ 11,368,289     $ (188,001 )     226  
                                                                         
2011
  $ 1,087,552     $ (118,593 )     71     $ 883,143     $ (16,529 )     36     $ 1,970,695     $ (135,122 )     107