Schedule of Changes in Carrying Amount of Goodwill Attributable to Each Business Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Goodwill [Line Items]
Beginning Balance	$ 676,582		$ 571,796
Adjustments	(634)
Acquisitions	0		112,221
Divestitures	(195)
Foreign currency translation	5,147		(7,435)
Ending Balance	680,900		676,582
Cumulative goodwill impairment charges	252,533	[1]
Industrial Products Group
Goodwill [Line Items]
Beginning Balance	358,235		250,084
Adjustments	(634)
Acquisitions			112,221
Divestitures	(195)
Foreign currency translation	1,670		(4,070)
Ending Balance	359,076		358,235
Cumulative goodwill impairment charges	252,533	[1]
Engineered Products Group
Goodwill [Line Items]
Beginning Balance	318,347		321,712
Foreign currency translation	3,477		(3,365)
Ending Balance	$ 321,824		$ 318,347

[1] Based on exchange rates at the date of the charge.