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Property, Plant, and Equipment, Net (Property, Plant, and Equipment - Net) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Property, Plant, and Equipment, Net
Land and Land Improvements	$ 63,144us-gaap_LandAndLandImprovements		$ 63,144us-gaap_LandAndLandImprovements		$ 66,303us-gaap_LandAndLandImprovements
Buildings and improvements	254,689us-gaap_BuildingsAndImprovementsGross		254,689us-gaap_BuildingsAndImprovementsGross		197,587us-gaap_BuildingsAndImprovementsGross
Leasehold improvements	19,324us-gaap_LeaseholdImprovementsGross		19,324us-gaap_LeaseholdImprovementsGross		20,026us-gaap_LeaseholdImprovementsGross
Machinery and production equipment	330,136wwd_MachineryAndEquipmentExcludingComputerAndOfficeEquipmentGross		330,136wwd_MachineryAndEquipmentExcludingComputerAndOfficeEquipmentGross		326,403wwd_MachineryAndEquipmentExcludingComputerAndOfficeEquipmentGross
Computer equipment and software	104,968wwd_ComputerEquipmentAndSoftware		104,968wwd_ComputerEquipmentAndSoftware		103,852wwd_ComputerEquipmentAndSoftware
Office furniture and equipment	23,975us-gaap_FurnitureAndFixturesGross		23,975us-gaap_FurnitureAndFixturesGross		20,992us-gaap_FurnitureAndFixturesGross
Other	18,405us-gaap_PropertyPlantAndEquipmentOther		18,405us-gaap_PropertyPlantAndEquipmentOther		18,839us-gaap_PropertyPlantAndEquipmentOther
Construction in progress	278,365us-gaap_ConstructionInProgressGross		278,365us-gaap_ConstructionInProgressGross		223,958us-gaap_ConstructionInProgressGross
Property, Plant and Equipment, Gross, Total	1,093,006us-gaap_PropertyPlantAndEquipmentGross		1,093,006us-gaap_PropertyPlantAndEquipmentGross		977,960us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation	(460,368)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment		(460,368)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment		(464,681)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, Plant and Equipment, Net, Total	632,638us-gaap_PropertyPlantAndEquipmentNet		632,638us-gaap_PropertyPlantAndEquipmentNet		513,279us-gaap_PropertyPlantAndEquipmentNet
Depreciation expense	11,449us-gaap_Depreciation	11,062us-gaap_Depreciation	22,447us-gaap_Depreciation	21,694us-gaap_Depreciation
Capitalized interest	$ 2,801us-gaap_InterestPaidCapitalized	$ 1,314us-gaap_InterestPaidCapitalized	$ 4,766us-gaap_InterestPaidCapitalized	$ 2,289us-gaap_InterestPaidCapitalized

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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The amount of cash paid during the current period for interest that is capitalized.

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Amount before accumulated deprecation and depletion of real estate held for productive use and additions or improvements to real estate held for productive use, examples include, but are not limited to, walkways, driveways, fences, and parking lots. Excludes land held for sale.

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Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.

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The gross amount of long lived, depreciable assets that are used in the creation, maintenance and utilization of information systems and capitalized computer software costs as of the balance sheet date.

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