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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 |  |

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- Definition Amount of the cumulative effect on retained earnings net of related income tax effect. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22663-107794 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The loss recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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