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Fair Value Measurements (Details Textual) (USD $) In Millions, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
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Fair Value Measurements (Textual) [Abstract] |  |
Assets recorded at fair value | $ 28.3 | $ 21.4
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value Measurements (Textual) [Abstract] |  |
Assets recorded at fair value | 0 | 0
Liabilities recorded at fair value | 0 | 0
Significant Unobservable Inputs (Level 3) [Member] |  |
Fair Value Measurements (Textual) [Abstract] |  |
Assets recorded at fair value | 0 | 0
Liabilities recorded at fair value | 0 | 0
9.0% Senior Subordinated Notes due 2018 [Member] |  |
Fair Value Measurements (Textual) [Abstract] |  |
Stated Interest rate on debt agreement | 9.00% |
7.0% Senior Subordinated Notes due 2022 [Member] |  |
Fair Value Measurements (Textual) [Abstract] |  |
Stated Interest rate on debt agreement | 7.00% |
5.0% Convertible Senior Note due 2023 [Member] |  |
Fair Value Measurements (Textual) [Abstract] |  |
Stated Interest rate on debt agreement | 5.00% |
Cash flow swaps designated as hedges [Member] |  |
Fair Value Measurements (Textual) [Abstract] |  |
Amount included in other accrued liabilities | 11.2 | 11.4
Amount included in other long-term liabilities | 11.2 | 20.0
Cash flow swaps not designated as hedges [Member] |  |
Fair Value Measurements (Textual) [Abstract] |  |
Amount included in other accrued liabilities | 0.7 | 0.7
Amount included in other long-term liabilities | $ 1.6 | $ 2.2

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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