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Acquisitions (Schedule Of Preliminary Estimated Purchase Price Allocation) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Oct. 02, 2012 AACOA | Oct. 02, 2012 AACOA Customer relationships | Oct. 02, 2012 AACOA Trade names | Oct. 02, 2012 AACOA Proprietary technology | Oct. 02, 2012 AACOA Noncompete agreements | Oct. 24, 2011 Terphane | Oct. 24, 2011 Terphane Customer relationships | Oct. 24, 2011 Terphane Trade names | Oct. 24, 2011 Terphane Proprietary technology | Oct. 24, 2011 Terphane Noncompete agreements
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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: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets - Indefinite |  |  |  |  |  | 4,800 |  | 3,400 | 1,600 |  | 32,600 |  | 14,700 | 2,300
Identifiable intangible assets - finite |  |  |  |  |  |  | 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 |  |  |  |  | 54,065 |  |  |  |  | 182,761 |  |  |  |
Goodwill | $ 172,788 | $ 176,620 | $ 165,372 | $ 103,639 | $ 13,696 |  |  |  |  | $ 63,214 |  |  |  |

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