Hedging Transactions and Derivative Financial Instruments (Additional Information) (Details)	6 Months Ended
Jun. 30, 2015 USD ($) Contract	Dec. 31, 2014 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Revolving credit outstanding borrowings	$ 180,000,000	$ 0
Bank Term Loan [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Number of derivative contracts related to minimizing risk associated with potential rise in copper prices (contract) \| Contract	23
Term loan debt	$ 55,000,000
Revolving credit outstanding borrowings	$ 125,000,000
Interest rate spread over variable rate (percent)	1.625%
Bank Term Loan [Member] \| LIBOR [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Interest rate spread over variable rate (percent)	0.1875%
Interest Rate Swap [Member] \| Bank Term Loan [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Term loan debt	$ 32,500,000

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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