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Activity in Rationalization Reserves (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended								9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Prior Years' Rationalization plans	Sep. 30, 2012 2012 Rationalization Plans	Sep. 30, 2012 Employee Severance and Benefits	Sep. 30, 2012 Employee Severance and Benefits Prior Years' Rationalization plans	Sep. 30, 2012 Employee Severance and Benefits 2012 Rationalization Plans	Sep. 30, 2012 Plant Exit Costs	Dec. 31, 2011 Plant Exit Costs	Sep. 30, 2012 Plant Exit Costs Prior Years' Rationalization plans	Sep. 30, 2012 Plant Exit Costs 2012 Rationalization Plans	Sep. 30, 2012 Non-Cash Asset Write-Down Prior Years' Rationalization plans	Sep. 30, 2012 Non-Cash Asset Write-Down 2012 Rationalization Plans
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2011	$ 4,596			$ 4,385			$ 211	$ 211
Rationalization Plan Reserves Established		112	5,697		1,100	3,524			(1,027)	1,001	39	1,172
Rationalization Plan Reserves Utilized		(2,743)	(3,119)		(3,731)	(946)			1,027	(1,001)	(39)	(1,172)
Total activity	(53)			(53)
Balance at September 30, 2012	$ 4,543			$ 4,332			$ 211	$ 211

Net total Increase or Decrease in the accrual for restructuring costs during the reporting period.

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