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Debt - Senior Secured Second Priority Notes (Details) - Senior Secured Second Priority Notes - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2017 | Dec. 31, 2017 | Mar. 31, 2017 | Dec. 31, 2017 | Jun. 30, 2016
Debt Instrument [Line Items] |  |  |  |  |
Loss on early extinguishment on debt | $ 11,400,000 |  |  |  |
Cash premium, percentage | 3.00% |  |  |  |
Early extinguishment of debt cash premium | $ 7,400,000 |  |  |  |
Non-cash charge for write-off of unamortized deferred financing costs |  |  |  | $ 4,000,000 |
Events of default, nonpayment of interest period |  |  |  | 30 days |
Events of defaults, failure to comply with obligations or covenants, period |  |  |  | 60 days |
Events of default, failure of subsidiary guarantors to comply with obligations, period |  |  |  | 45 days |
Debt covenant, indebtedness (exceeds) |  |  |  | $ 150,000,000.0 |
Debt covenant, failure to discharge judgment (in excess of) |  |  |  | 100,000,000.0 |
Debt covenant, minimum fair market value of collateral in force |  | $ 150,000,000.0 |  | $ 150,000,000.0 |
Upon Change in Control |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 101.00% |
Asset Sale |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 100.00% |
7.50% Senior Notes, Due 2022 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated rate |  |  |  |  | 7.50%
Debt instrument redemption price percentage |  |  |  | 103.00% |
Principal amount redeemed | 122,000,000 | 123,500,000 | $ 122,000,000 | $ 123,500,000 |
7.50% Senior Notes, Due 2022 | Prior to June 1, 2019 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 100.00% |
Redemption price, percentage of principal amount redeemed |  |  |  | 10.00% |
7.50% Senior Notes, Due 2022 | On or after June 1, 2019 and prior to June 1, 2020 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 103.75% |
7.50% Senior Notes, Due 2022 | On or after June 1, 2020 and prior to June 1, 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 101.875% |
7.50% Senior Notes, Due 2022 | On or after June 1, 2021 and prior to June 1, 2022 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 100.00% |
2022 Notes, Optional Redemption |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Aggregate principal amount |  |  |  |  | $ 610,000,000
Debt instrument redemption price percentage |  |  |  | 107.50% |
2022 Notes, Optional Redemption | Prior to June 1, 2019 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 40.00% |
7.75% Senior Notes, Due 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Aggregate principal amount |  |  |  |  | $ 625,000,000
Stated rate |  |  |  |  | 7.75%
Debt instrument redemption price percentage |  |  |  | 103.00% |
Principal amount redeemed | $ 125,000,000 |  | 125,000,000 |  |
Loss on early extinguishment on debt |  | $ 5,600,000 | $ 5,800,000 |  |
7.75% Senior Notes, Due 2024 | Prior to June 1, 2019 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 100.00% |
Redemption price, percentage of principal amount redeemed |  |  |  | 10.00% |
7.75% Senior Notes, Due 2024 | On or after June 1, 2019 and prior to June 1, 2020 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 105.813% |
7.75% Senior Notes, Due 2024 | On or after June 1, 2020 and prior to June 1, 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 103.875% |
7.75% Senior Notes, Due 2024 | On or after June 1, 2021 and prior to June 1, 2022 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 101.938% |
7.75% Senior Notes, Due 2024 | On or after June 1, 2022 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 100.00% |
2024 Notes, Optional Redemption |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument redemption price percentage |  |  |  | 107.75% |
2024 Notes, Optional Redemption | Prior to June 1, 2019 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  |  | 40.00% |

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