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Fair Value Disclosures (Details Textual)
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Jun. 30, 2012
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Dec. 31, 2011
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6.25% senior notes [Member]
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| Fair Value Disclosures (Textual) [Abstract] | ||
| Debt instrument, Stated rate | 6.25% | 6.25% |
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7.731% senior subordinated notes [Member]
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| Fair Value Disclosures (Textual) [Abstract] | ||
| Debt instrument, Stated rate | 7.731% | 7.731% |
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7.15% senior notes [Member]
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| Fair Value Disclosures (Textual) [Abstract] | ||
| Debt instrument, Stated rate | 7.15% | 7.15% |
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7.00% senior notes due 2022 [Member]
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| Fair Value Disclosures (Textual) [Abstract] | ||
| Debt instrument, Stated rate | 7.00% |
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- Details
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- Definition
Interest rate stated in the contractual debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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