Property, Plant and Equipment (Detail) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 201,562	$ 198,008
Less accumulated depreciation and amortization	(132,966)	(134,339)
Property, plant and equipment, net	68,596	63,669
Buildings and land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	54,330	43,455
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	68,476	69,278
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	49,105	50,499
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,451	10,817
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	17,301	22,758
Capital projects in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,899	$ 1,201