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Goodwill And Intangible Assets (Activity Of Goodwill By Reportable Operating Segment) (Details) (USD $)
12 Months Ended
Sep. 30, 2011
Oct. 01, 2010
Goodwill [Line Items]  
Balance, beginning$ 208,451,000$ 210,300,000
Acquisition of businesses3,400,000 
Payment and/or accrual of contingent consideration2,100,0001,800,000
Adjustment to deferred tax asset(100,000) 
Foreign currency translation adjustments(1,400,000)(3,600,000)
Balance, ending212,452,000208,451,000
Oncology Systems [Member]
  
Goodwill [Line Items]  
Balance, beginning126,700,000126,700,000
Acquisition of businesses3,400,000 
Payment and/or accrual of contingent consideration400,0000
Adjustment to deferred tax asset0 
Foreign currency translation adjustments00
Balance, ending130,500,000126,700,000
X-Ray Products [Member]
  
Goodwill [Line Items]  
Balance, beginning4,500,0002,700,000
Acquisition of businesses0 
Payment and/or accrual of contingent consideration1,700,0001,800,000
Adjustment to deferred tax asset(100,000) 
Foreign currency translation adjustments00
Balance, ending6,100,0004,500,000
Other [Member]
  
Goodwill [Line Items]  
Balance, beginning77,300,00080,900,000
Acquisition of businesses0 
Payment and/or accrual of contingent consideration00
Adjustment to deferred tax asset0 
Foreign currency translation adjustments(1,400,000)(3,600,000)
Balance, ending$ 75,900,000$ 77,300,000