Derivative Instruments - Summary of Amount Recognized as and Reclassified from Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	$ 45	$ 85	$ 313
Plus Recognized as Comprehensive Income (Loss)	398	(475)	(323)
Less Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss	(108)	(435)	(95)
Comprehensive Income (Loss) End of the Year	551	45	85
Foreign Currency Sales Contracts [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	4	0	0
Plus Recognized as Comprehensive Income (Loss)	0	14	(21)
Less Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss	4	10	(21)
Comprehensive Income (Loss) End of the Year	0	4	0
Foreign Currency Purchase Contracts [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	241	258	275
Plus Recognized as Comprehensive Income (Loss)	0	0	0
Less Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss	25	17	17
Comprehensive Income (Loss) End of the Year	216	241	258
Futures Contracts - Copper and Aluminum [Member]
Derivative [Line Items]
Comprehensive Income (Loss) Beginning of the Year	(200)	(173)	38
Plus Recognized as Comprehensive Income (Loss)	398	(489)	(302)
Less Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss	(137)	(462)	(91)
Comprehensive Income (Loss) End of the Year	$ 335	$ (200)	$ (173)