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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets Gross Carrying Amounts And Accumulated Amortization) (Details) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Sep. 30, 2011
--- | --- | --- | --- | ---
FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems [Line Items] |  |  |  |
Goodwill | $ 282,949,000 | $ 25,000,000 | $ 279,640,000 | $ 280,200,000
Customer Relationships [Member] |  |  |  |
FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems [Line Items] |  |  |  |
Gross carrying amount | 64,100,000 |  | 61,400,000 |
Less: accumulated amortization | 17,900,000 |  | 14,700,000 |
Net | 46,200,000 |  | 46,700,000 |
Other Intangible Assets [Member] |  |  |  |
FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems [Line Items] |  |  |  |
Gross carrying amount | 400,000 |  | 200,000 |
Less: accumulated amortization | 200,000 |  | 200,000 |
Net | 200,000 |  | 0 |
Patents [Member] |  |  |  |
FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems [Line Items] |  |  |  |
Gross carrying amount | 900,000 |  | 800,000 |
Less: accumulated amortization | 600,000 |  | 600,000 |
Net | 300,000 |  | 200,000 |
Capitalized Software [Member] |  |  |  |
FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems [Line Items] |  |  |  |
Gross carrying amount | 32,100,000 |  | 23,000,000 |
Less: accumulated amortization | 15,300,000 |  | 11,700,000 |
Net | 16,800,000 |  | 11,300,000 |
Trade Names [Member] |  |  |  |
FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems [Line Items] |  |  |  |
Intangible assets with indefinite lives | $ 116,700,000 |  | $ 118,200,000 |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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