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Debt Senior Notes (Details) (USD $) | 0 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 25, 2014 | Sep. 30, 2014 | Sep. 25, 2014 | Dec. 31, 2013
5.875% Senior Notes, Due 2024 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unamortized debt issuance expense | $ 3,800,000 |  | $ 3,800,000 |
5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Face amount |  |  | 250,000,000 |
Interest rate |  | 5.875% | 5.875% | 5.875%
Days of interest payment failure to be considered default | 30 days |  |  |
Maximum excess proceeds on sale of asset | $ 25,000,000 |  |  |
Days of failure to comply with other indenture agreements to be considered default | 60 days |  |  |
5.125% Senior Notes, Due 2023 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 5.125% |  | 5.125%
5.875% Senior Notes, Due 2022 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 5.875% |  | 5.875%
6.625% Senior Notes, Due 2021 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 6.625% | 6.625% | 6.625% | 6.625%
Prior to October 15, 2017 | 5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Percentage of principal amount redeemable | 35.00% |  |  |
Redemption price percentage | 105.875% |  |  |
October 15, 2017 to October 14, 2019 | 5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |
On or after October 15, 2019 | Maximum | 5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Notice period prior to redemption | 60 days |  |  |
On or after October 15, 2019 | Minimum | 5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Notice period prior to redemption | 30 days |  |  |
October 15, 2019 to October 14, 2020 | 5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 102.938% |  |  |
October 15, 2020 to October 14, 2021 | 5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 101.958% |  |  |
October 15, 2021 to October 14, 2022 | 5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.979% |  |  |
October 15, 2022 and thereafter | 5.875% Senior Notes, Due 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price percentage | 100.00% |  |  |

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- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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