Property, Plant and Equipment - Carrying Values of Property, Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Land and land improvements	$ 35,010	$ 33,427
Buildings and leasehold improvements	136,751	136,464
Machinery and equipment	438,928	412,809
Computer equipment and software	92,946	66,059
Construction in process	27,135	21,288
Gross property, plant and equipment	730,770	670,047
Accumulated depreciation	(423,722)	(389,934)
Net property, plant and equipment	$ 307,048	$ 280,113