Hedging Transactions and Derivative Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2012 Bank Term Loan Contract	Jul. 31, 2012 Bank Term Loan Cash Flow Hedging Subsequent Event
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Number of derivative contracts related to minimizing risk associated with potential rise in copper prices		3
Term loan debt		$ 92.5
Total outstanding debt	$ 106.0
Variable interest rate		0.25%
Interest rate spread over variable rate	2.25%	2.25%
Interest rate swap derivative, percentage of debt hedged			65.00%

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The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

The effective interest rate at the end of the reporting period.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 30

-Section 45

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- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Number of price risk derivative instruments held by the entity at the reporting date.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Percentage of an entity's outstanding debt that is designated as a hedged item in cash flow, fair value, or net investment hedge.

+ References

No definition available.

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