Hedging Transactions and Derivative Financial Instruments - Additional Information (Detail) (Bank Term Loan, USD $) In Millions, unless otherwise specified	Jun. 30, 2012 Contract	Jul. 31, 2012 Cash Flow Hedging [Member] 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	2
Term loan debt	$ 95.0
Interest rate swap, fixed interest rate for the period from July 2013 to June 2016	0.75%
Variable interest rate	0.25%
Interest rate spread over variable rate	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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-Number 210

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-Section S99

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

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-Section S99

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-Subparagraph (SX 210.9-03.16)

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

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- Definition

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

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-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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-Name Statement of Financial Accounting Standard (FAS)

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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.

+ Details

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