Hedging Transactions and Derivative Financial Instruments (Additional Information) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Contract	Mar. 31, 2017 USD ($)	Feb. 17, 2017 USD ($)
Bank Term Loan
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative contracts related to minimizing risk associated with potential rise in copper prices | Contract	21
Interest rate swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on cash flow hedge ineffectiveness	$ 300
Revolving Credit Facility | Third Amended Credit Agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit agreement, maximum borrowing capacity			$ 450,000
Revolving Credit Facility | Third Amended Credit Agreement | Interest rate swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, amount of hedged item		$ 75,000
Accounting Standards Update 2017-12 | Interest rate swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative effect on retained earnings	$ 200