Derivative Instruments - Summary of Amount Recognized as and Reclassified from Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative [Line Items]
Beginning of the Period	$ (64)	$ 739
Recognized	268	(315)
Reclassified	(119)	209
End of the Period	323	215
Foreign Currency Purchase Contracts [Member]
Derivative [Line Items]
Beginning of the Period	216	239
Recognized	0	0
Reclassified	7	7
End of the Period	209	232
Futures Contracts - Copper and Aluminum [Member]
Derivative [Line Items]
Beginning of the Period	(280)	500
Recognized	268	(315)
Reclassified	(126)	202
End of the Period	$ 114	$ (17)