Activity in Rationalization Plan Reserves (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2012	$ 4,929
Total activity	(942)
Balance at March 31, 2013	3,987
Prior Years' Rationalization plans
Restructuring Cost and Reserve [Line Items]
Rationalization Plan Reserves Established	489
Rationalization Plan Reserves Utilized	(1,834)
2013 Rationalization Plans
Restructuring Cost and Reserve [Line Items]
Rationalization Plan Reserves Established	862
Rationalization Plan Reserves Utilized	(459)
Employee Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2012	3,231
Total activity	(949)
Balance at March 31, 2013	2,282
Employee Severance and Benefits | Prior Years' Rationalization plans
Restructuring Cost and Reserve [Line Items]
Rationalization Plan Reserves Established	(151)
Rationalization Plan Reserves Utilized	(1,201)
Employee Severance and Benefits | 2013 Rationalization Plans
Restructuring Cost and Reserve [Line Items]
Rationalization Plan Reserves Established	761
Rationalization Plan Reserves Utilized	(358)
Plant Exit Costs
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2012	1,698
Total activity	7
Balance at March 31, 2013	1,705
Plant Exit Costs | Prior Years' Rationalization plans
Restructuring Cost and Reserve [Line Items]
Rationalization Plan Reserves Established	462
Rationalization Plan Reserves Utilized	(455)
Non-Cash Asset Write-Down | Prior Years' Rationalization plans
Restructuring Cost and Reserve [Line Items]
Rationalization Plan Reserves Established	178
Rationalization Plan Reserves Utilized	(178)
Non-Cash Asset Write-Down | 2013 Rationalization Plans
Restructuring Cost and Reserve [Line Items]
Rationalization Plan Reserves Established	101
Rationalization Plan Reserves Utilized	$ (101)