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Fair Value of Assets and Liabilities (Details Textual) | Jun. 30, 2013 | Mar. 19, 2013
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Fair Value of Assets and Liabilities (Textual) [Abstract] |  |
Interest rate | 7.75% |
Senior Note Due 2017 |  |
Fair Value of Assets and Liabilities (Textual) [Abstract] |  |
Interest rate | 7.75% |
Senior Notes Due 2021 |  |
Fair Value of Assets and Liabilities (Textual) [Abstract] |  |
Interest rate | 6.625% |
Senior Notes Due 2023 |  |
Fair Value of Assets and Liabilities (Textual) [Abstract] |  |
Interest rate |  | 5.125%
Senior Unsecured Notes Due April 2023 | Senior Notes |  |
Fair Value of Assets and Liabilities (Textual) [Abstract] |  |
Interest rate | 5.125% | 5.125%

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- Definition Interest rate stated in the contractual 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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