Derivative Instruments - Summary of Change in Fair Value Reclassified or Expected to be Reclassified from Accumulated Other Comprehensive Income (Loss) to Earnings (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Foreign Currency Sales Contracts [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Expected release to pre - tax earnings	$ 0
Amount released to pre - tax earnings	0	197	228
Foreign Currency Purchase Contracts [Member]
Derivative [Line Items]
Expected release to pre - tax earnings	27
Amount released to pre - tax earnings	27	27	32
Futures Contracts - Copper and Aluminum [Member]
Derivative [Line Items]
Expected release to pre - tax earnings	59
Amount released to pre - tax earnings	$ (419)	$ (398)	$ 353