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Acquisitions (Schedule Of Preliminary Estimated Purchase Price Allocation) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 AACOA [Member]	Sep. 30, 2012 AACOA [Member] Customer Relationships [Member]	Sep. 30, 2012 AACOA [Member] Proprietary Technology [Member]	Sep. 30, 2012 AACOA [Member] Trade Names [Member]	Sep. 30, 2012 AACOA [Member] Noncompete Agreements [Member]	Oct. 24, 2011 Terphane [Member]	Oct. 24, 2011 Terphane [Member] Customer Relationships [Member]	Oct. 24, 2011 Terphane [Member] Proprietary Technology [Member]	Oct. 24, 2011 Terphane [Member] Trade Names [Member]	Oct. 24, 2011 Terphane [Member] Noncompete Agreements [Member]
Business Acquisition [Line Items]
Accounts receivable	$ 12,477					$ 14,321
Inventories	4,708					23,437
Property, plant & equipment	15,116					86,963
Identifiable intangible assets		4,800	3,400		1,600		32,600	14,700		2,300
Identifiable intangible assets				4,800					9,400
Other assets (current & noncurrent)	42					3,680
Trade payables & accrued expenses	(6,574)
Trade payables						(17,471)
Other liabilities (current & noncurrent)						(12,216)
Deferred taxes						(38,167)
Total identifiable net assets	40,369					119,547
Purchase price, net of cash received	54,625					182,761
Goodwill	$ 14,256					$ 63,214

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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