Derivative Instruments - Summary of Change in Fair Value Reclassified or Expected to be Reclassified from Accumulated Other Comprehensive Loss to Earnings (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Amount released to pre - tax earnings	$ (3,191)	$ (2,202)	$ (1,913)	$ (4,783)	$ (43,062)	$ (27,382)	$ (6,486)	$ (2,890)	$ (12,089)	$ (79,820)	$ 1,373
Foreign Currency Sales Contracts [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Amount released to pre - tax earnings	0								0
Amount released to pre - tax earnings									0	6	17
Foreign Currency Purchase Contracts [Member]
Derivative [Line Items]
Amount released to pre - tax earnings	27								27
Amount released to pre - tax earnings									31	27	27
Futures Contracts - Copper and Aluminum [Member]
Derivative [Line Items]
Amount released to pre - tax earnings	$ 500								500
Amount released to pre - tax earnings									$ 639	$ (220)	$ (751)