Derivative Instruments - Summary of Amount Recognized as and Reclassified from Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	$ 318	$ 109	$ 1,199
Recognized as Comprehensive Income (Loss)	(251)	102	(707)
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss)	(246)	(107)	383
Comprehensive Income (Loss) End of the Year	313	318	109
Foreign Currency Sales Contracts [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	0	114	281
Recognized as Comprehensive Income (Loss)	0	10	(24)
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss)	0	124	143
Comprehensive Income (Loss) End of the Year	0	0	114
Foreign Currency Purchase Contracts [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	292	309	329
Recognized as Comprehensive Income (Loss)	0	0	0
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss)	17	17	20
Comprehensive Income (Loss) End of the Year	275	292	309
Futures Contracts - Copper and Aluminum [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	26	(314)	589
Recognized as Comprehensive Income (Loss)	(251)	92	(683)
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss)	(263)	(248)	220
Comprehensive Income (Loss) End of the Year	$ 38	$ 26	$ (314)