Acquisitions (Details) (Value Plastics [Member], USD $) In Thousands, unless otherwise specified	Oct. 31, 2011
Value Plastics [Member]
Fair values:
Assets acquired	$ 26,647
Liabilities assumed	(18,930)
Intangible assets subject to amortization	74,720
Goodwill	179,050
Fair value of the assets acquired and the liabilities assumed, intangible assets	261,487
Less cash acquired	(3,108)
Purchase price	$ 258,379

Amount of cash paid to acquire the entity.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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The amount of acquisition cost of a business combination allocated to assets acquired.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

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The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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- Definition

The amount of cash and cash equivalents acquired in a business combination.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

+ References

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

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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The amount of acquisition cost of a business combination allocated to liabilities assumed.

+ References

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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