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Debt (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Schedule of Obligations Under Debt Arrangements | At December 31, 2017 and 2016, our obligations under debt arrangements consisted of the following:
| December 31, 2017 |  | December 31, 2016
| Principal |  | Unamortized Discount and Debt Issuance Costs |  | Net Value |  | Principal |  | Unamortized Discount and Debt Issuance Costs |  | Net Value
Senior secured credit facility | $ | 1,099,200 |  |  | $ | — |  |  | $ | 1,099,200 |  |  | $ | 1,278,200 |  |  | $ | — |  |  | 1,278,200 |
5.750% senior unsecured notes | 145,170 |  |  | 1,303 |  |  | 143,867 |  |  | 350,000 |  |  | 4,163 |  |  | 345,837 |
6.750% senior unsecured notes | 750,000 |  |  | 16,077 |  |  | 733,923 |  |  | 750,000 |  |  | 19,296 |  |  | 730,704 |
6.000% senior unsecured notes | 400,000 |  |  | 5,691 |  |  | 394,309 |  |  | 400,000 |  |  | 6,758 |  |  | 393,242 |
5.625% senior unsecured notes | 350,000 |  |  | 5,717 |  |  | 344,283 |  |  | 350,000 |  |  | 6,614 |  |  | 343,386 |
6.500% senior unsecured notes | 550,000 |  |  | 9,462 |  |  | 540,538 |  |  | — |  |  | — |  |  | — |
6.250% senior unsecured notes | 450,000 |  |  | $ | 8,002 |  |  | 441,998 |  |  | — |  |  | — |  |  | — |
Total long-term debt | $ | 3,744,370 |  |  | $ | 46,252 |  |  | $ | 3,698,118 |  |  | $ | 3,128,200 |  |  | $ | 36,831 |  |  | $ | 3,091,369 |
Schedule of Summary of Applicable Redemption Periods | A summary of the applicable redemption periods is provided in the table below.
| 2021 Notes |  | 2022 Notes |  | 2023 Notes |  | 2024 Notes |  | 2025 Notes |  | 2026 Notes
Redemption right beginning on | February 15, 2017 |  | August 1, 2018 |  | May 15, 2018 |  | June 15, 2019 |  | October 1, 2020 |  | February 15, 2021
Redemption of up to 35% of the principal amount of notes with the proceeds of an equity offering permitted prior to | February 15, 2017 |  | August 1, 2018 |  | May 15, 2018 |  | June 15, 2019 |  | October 1, 2020 |  | February 15, 2021

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- Definition Tabular disclosure of debt instruments or arrangements with redemption features. Includes, but is not limited to, description of debt redemption features, percentage price at which debt can be redeemed by the issuer, and period start and end for debt maturity or redemption. + References No definition available. + Details
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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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