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Long-Term Debt (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2011 | Mar. 09, 2007
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Long-Term Debt [Abstract] |  |
Capital lease obligation pertaining to acquisition of Vision |  | $ 1.4
Long term debt, callable by the issuer in 2012 | $ 525.0 |

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- Definition Long term debt, callable by issuer + References No definition available. + Details
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Balance Type: | credit
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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Details
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