Related Party Transactions (Schedule Of Related Party Transactions) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Aquila [Member]
Related Party Transaction [Line Items]
Sales to related party	$ 6,056	$ 7,720
Purchases from related party	890	243
Amounts in accounts receivable	3,799	3,250
Amounts in accounts payable	227	298
Nagase-Landauer, Ltd [Member]
Related Party Transaction [Line Items]
Sales to related party	1,070	296	1,450
Purchases from related party	1,710	3,092	2,640
Amounts in accounts receivable	27	258
Amounts in accounts payable	$ 60	$ 187

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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Carrying amount as of the balance sheet date of obligations due all related parties.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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