Inventories (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Inventory Disclosure [Abstract]
Other Inventory, Capitalized Costs, Gross	$ 0.4us-gaap_OtherInventoryCapitalizedCosts	$ 0.5us-gaap_OtherInventoryCapitalizedCosts
Inventory Valuation Reserves	$ 4.7us-gaap_InventoryValuationReserves	$ 4.6us-gaap_InventoryValuationReserves

Amount of valuation reserve for inventory.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_InventoryValuationReserves
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant