Schedule of Restructuring Charges by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			36 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)	$ 18,670	$ 8,584	$ 2,196	$ 29,450
Industrial Products Group
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)	14,761	6,621	3,687	25,069
Engineered Products Group
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)	$ 3,909	$ 1,963	$ (1,491)	$ 4,381