Schedule of Restructuring Charges by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended					6 Months Ended				12 Months Ended		30 Months Ended
	Jun. 30, 2012		Mar. 31, 2012	Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)	$ (70)	[1]	$ 14,400	$ 2,983	[1]	$ 14,345	[1]	$ 3,963	[1]	$ 8,584	$ 2,196	$ 25,125
Industrial Products Group
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)						11,491				6,621	3,687	21,799
Engineered Products Group
Restructuring Cost and Reserve [Line Items]
Restructuring charges (credits)						$ 2,854				$ 1,963	$ (1,491)	$ 3,326

[1] See Note 3 "Restructuring."