Property, Plant and Equipment - Schedule (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 195,759	$ 210,344
Less accumulated depreciation and amortization	(147,889)	(145,866)
Property, plant and equipment, net	47,870	64,478
Buildings and land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	38,539	55,352
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	72,927	70,719
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	55,375	51,813
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,298	10,908
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,522	18,938
Capital projects in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,098	$ 2,614