Derivative Instruments - Summary of Amount Recognized as and Reclassified from Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	$ 551	$ 45
Plus Recognized as Comprehensive Income (Loss)	224	18
Less Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss	155	(135)
Comprehensive Income (Loss) End of the Period	620	198
Foreign Currency Sales Contracts [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	0	4
Plus Recognized as Comprehensive Income (Loss)	0	3
Less Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss	0	7
Comprehensive Income (Loss) End of the Period	0	0
Foreign Currency Purchase Contracts [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	216	241
Plus Recognized as Comprehensive Income (Loss)	0	0
Less Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss	7	4
Comprehensive Income (Loss) End of the Period	209	237
Futures Contracts - Copper and Aluminum [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	335	(200)
Plus Recognized as Comprehensive Income (Loss)	224	15
Less Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss	148	(146)
Comprehensive Income (Loss) End of the Period	$ 411	$ (39)