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Investments (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jul. 01, 2012
Jul. 03, 2011
Jul. 01, 2012
Jul. 03, 2011
Sep. 30, 2011
Investments (Textual) [Abstract]          
Impairment losses on operations $ 2,487 $ 1,259 $ 19,787 $ 1,259  
Available for sale securities on fixed maturity   461,506   461,506  
Gross gains on available-for-sale securities   12,866   12,866  
Gross losses on available-for-sale securities   1,815   1,815  
Net realized gains on available-for-sale securities 2,487 1,259 19,787 1,259  
FGL [Member]
         
Investments (Textual) [Abstract]          
Fair value of investment securities in banking industry 1,982,603   1,982,603    
Percentage of invested assets portfolio 12.80%   12.80%    
Issues on investment 121   121    
Percentage of investment accounting 38.00%   38.00%    
FGL exposure to sub prime 236,441   236,441    
Exposure to sub-prime and Alternative-A residential mortgage-backed securities 87,073   87,073    
Percentage of FGL exposure to sub prime 1.50%   1.50%    
Percentage Of exposure to sub-prime and Alternative-A residential mortgage-backed securities To Invested Assets 0.60%   0.60%    
Net Investment Income [Member]
         
Investments (Textual) [Abstract]          
Available for sale securities on fixed maturity 1,216,158   4,366,308    
Gross gains on available-for-sale securities 49,469   211,908    
Gross losses on available-for-sale securities 9,208   20,897    
Insurance and Financial Services:
         
Investments (Textual) [Abstract]          
Unrealized losses included in AOCI related to the non-credit portion of other-than-temporary impairments on non-agency residential-mortgage-backed securities 92,835   92,835   234,795
Fair value on securities 27,016   27,016   31,320
Percentage of amortized cost     20.00%    
Percentage of carrying value of all investments     1.00%    
Impairment losses on operations 2,487 1,259 19,787 1,259  
Amortized cost on other than temporary impairments 101,887 12,140 101,887 12,140  
Fair value on other than temporary impairments 80,570 10,737 80,570 10,737  
Non-agency residential mortgage-backed securities [Member]
         
Investments (Textual) [Abstract]          
Unrealized gain included in AOCI related to the non-credit portion of other-than-temporary impairments on non-agency residential-mortgage-backed securities 851   851   524
Unrealized losses included in AOCI related to the non-credit portion of other-than-temporary impairments on non-agency residential-mortgage-backed securities 1,880   1,880   24
Impairment losses on operations 828 1,259 6,901 1,259  
Non-agency residential mortgage-backed securities [Member] | Insurance and Financial Services:
         
Investments (Textual) [Abstract]          
Unrealized losses included in AOCI related to the non-credit portion of other-than-temporary impairments on non-agency residential-mortgage-backed securities $ 15,046   $ 15,046   $ 23,120