Properties - Summary of Properties (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Property, Plant and Equipment [Line Items]
Total properties at cost	$ 354,572	$ 314,281
Less accumulated depreciation	140,253	107,482
Properties, net	214,319	206,799
Land, buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Total properties at cost	88,580	101,303
Machinery, equipment and other [Member]
Property, Plant and Equipment [Line Items]
Total properties at cost	247,626	202,844
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Total properties at cost	$ 18,366	$ 10,134

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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