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Condensed Consolidating Financial Information (Details Textual) | Sep. 30, 2013 | Mar. 19, 2013 | Dec. 31, 2012
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Notes bear interest at a rate | 7.75% |  |
Percentage of subsidiary owned | 100.00% |  |
Senior Notes Due 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Notes bear interest at a rate | 6.625% |  | 6.625%
Senior Notes Due 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Notes bear interest at a rate | 5.125% | 5.125% | 5.125%
7.75% Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Notes bear interest at a rate | 7.75% |  |

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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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