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Investments (Details 6) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jul. 01, 2012
Jul. 03, 2011
Jul. 01, 2012
Jul. 03, 2011
Net investment income:        
Gross investment income $ 182,197 $ 180,403 $ 548,256 $ 180,403
External investment expense (2,900) (3,518) (9,199) (3,518)
Net investment income 179,297 176,885 539,057 176,885
Fixed maturity available-for-sale securities [Member]
       
Net investment income:        
Gross investment income 172,741 174,181 530,433 174,181
Equity available-for-sale securities [Member]
       
Net investment income:        
Gross investment income 4,817 5,641 10,839 5,641
Policy loans [Member]
       
Net investment income:        
Gross investment income 125 800 550 800
Invested cash and short-term investments [Member]
       
Net investment income:        
Gross investment income 2,105 72 3,458 72
Other investments [Member]
       
Net investment income:        
Gross investment income $ 2,409 $ (291) $ 2,976 $ (291)