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Segment Information (Reconciliation Of Assets From Segment To Consolidated) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Assets	$ 302,125	$ 168,656
Radiation Measurement [Member]
Assets	171,831	136,950
Medical Physics [Member]
Assets	36,304	31,706
Medical Products [Member]
Assets	$ 93,990	$ 0

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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