Schedule of Restructuring Charges by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended		27 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,065	[1]	$ 14,415	[1]	$ 18,670	$ 8,584	$ 29,319
Industrial Products Group
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,440				14,761	6,621	22,822
Engineered Products Group
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 625				$ 3,909	$ 1,963	$ 6,497

[1] (1) See Note 3 "Restructuring."