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Investments (Details 4) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jul. 01, 2012
Jul. 03, 2011
Jul. 01, 2012
Jul. 03, 2011
Reconciliation of other than temporary impairment on fixed maturity        
Beginning balance $ 2,569   $ 667  
Increases attributable to credit losses on securities:        
Other-than-temporary impairment was previously recognized 112   112  
Other-than-temporary impairment was not previously recognized   395 1,902 395
Ending balance $ 2,681 $ 395 $ 2,681 $ 395