Summary of Costs and Ranges of Useful Lives of the Major Classes of Property, Plant and Equipment and Total Accumulated Depreciation related to Property, Plant and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2011 Year	Dec. 31, 2010 Year
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 536,938	$ 520,592
Less accumulated depreciation	(379,938)	(345,025)
Property, plant and equipment, net	157,000	175,567
Land, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	7,168	7,195
Buildings, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	37,516	37,657
Property, plant and equipment, Minimum useful lives	10	10
Property, plant and equipment, Maximum useful lives	30	30
Machinery and equipment, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	229,345	225,762
Property, plant and equipment, Minimum useful lives	3	3
Property, plant and equipment, Maximum useful lives	20	20
Office furniture and equipment, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	234,662	221,804
Property, plant and equipment, Minimum useful lives	3	3
Property, plant and equipment, Maximum useful lives	10	10
Leasehold improvements, at cost
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 28,247	$ 28,174
Property, plant and equipment, Minimum useful lives	5	5
Property, plant and equipment, Maximum useful lives	10	10