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SEGMENT INFORMATION (Assets by segment) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Segment assets:      
Total assets $ 944,448 $ 862,994 $ 815,609
Equipment [Member]
     
Segment assets:      
Total assets 839,847 764,793 746,636
Expendable Tools [Member]
     
Segment assets:      
Total assets $ 104,601 $ 98,201 $ 68,973