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Goodwill And Other Intangible Assets (Changes In The Carrying Amount Of Goodwill, By Reportable Segment) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Goodwill [Line Items]    
Goodwill $ 106,717 [1] $ 39,962
Increase related to acquisitions   66,943
Effects of foreign currency 419 (188)
Accumulated goodwill impairment charges (22,700)  
Goodwill 84,436 [1] 106,717 [1]
Radiation Measurement [Member]
   
Goodwill [Line Items]    
Goodwill 20,037 20,225
Effects of foreign currency 419 (188)
Goodwill 20,456 20,037
Medical Physics [Member]
   
Goodwill [Line Items]    
Goodwill   19,737
Increase related to acquisitions   2,874
Goodwill 22,611 22,611
Medical Products [Member]
   
Goodwill [Line Items]    
Increase related to acquisitions   64,069
Accumulated goodwill impairment charges (22,700)  
Goodwill $ 41,369 $ 64,069
[1] Restated