Property, Plant and Equipment - Schedule (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 173,778	$ 186,161
Less accumulated depreciation and amortization	(123,595)	(138,655)
Property, plant and equipment, net	50,183	47,506
Buildings and land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	47,639	38,539
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	59,962	72,240
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	42,104	49,947
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,774	9,456
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	17,771	13,937
Capital projects in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,528	$ 2,042