Fair Value Measurements - Estimated Fair Value and Carrying Value of Senior Notes (Details) - USD ($)
$ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
| 8.125% Convertible Senior Notes due 2022 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Long-term debt, fixed interest rate |
8.125%
|
|
|
| 7.5% Convertible Senior Notes due 2023 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Long-term debt, fixed interest rate |
7.50%
|
|
|
| Senior Secured Notes | 8.75% Senior Secured Notes |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Carrying value |
$ 1,328,000
|
$ 1,265,814
|
|
| Long-term debt, fixed interest rate |
8.75%
|
|
|
| Senior Unsecured Notes | 8.75% Senior Secured Notes |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Long-term debt, fixed interest rate |
8.75%
|
8.75%
|
|
| Senior Unsecured Notes | 8.75% Senior Notes due 2020 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Carrying value |
$ 395,935
|
$ 389,232
|
|
| Long-term debt, fixed interest rate |
8.75%
|
8.75%
|
|
| Senior Unsecured Notes | 7.5% Senior Notes due 2021 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Carrying value |
$ 757,767
|
$ 751,087
|
|
| Long-term debt, fixed interest rate |
7.50%
|
7.50%
|
|
| Senior Unsecured Notes | 8.125% Senior Notes due 2022 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Carrying value |
$ 527,737
|
$ 518,693
|
|
| Long-term debt, fixed interest rate |
8.125%
|
8.125%
|
8.125%
|
| Senior Unsecured Notes | 7.5% Senior Notes due 2023 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Carrying value |
$ 543,561
|
$ 534,869
|
|
| Long-term debt, fixed interest rate |
7.50%
|
7.50%
|
|
| Senior Unsecured Notes | 8.125% Convertible Senior Notes due 2022 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Long-term debt, fixed interest rate |
8.125%
|
8.125%
|
|
| Senior Unsecured Notes | 7.5% Convertible Senior Notes due 2023 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Long-term debt, fixed interest rate |
7.50%
|
7.50%
|
|
| Convertible Debt | 8.125% Convertible Senior Notes due 2022 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Carrying value |
$ 40,694
|
$ 78,290
|
|
| Long-term debt, fixed interest rate |
8.125%
|
|
8.125%
|
| Convertible Debt | 7.5% Convertible Senior Notes due 2023 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Carrying value |
$ 46,900
|
24,393
|
|
| Long-term debt, fixed interest rate |
7.50%
|
|
7.50%
|
| Fair Value Measurements Level 2 | Senior Secured Notes | 8.75% Senior Secured Notes |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Fair Value |
$ 487,207
|
403,098
|
|
| Fair Value Measurements Level 2 | Senior Unsecured Notes | 8.75% Senior Notes due 2020 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Fair Value |
28,579
|
39,740
|
|
| Fair Value Measurements Level 2 | Senior Unsecured Notes | 7.5% Senior Notes due 2021 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Fair Value |
47,019
|
79,812
|
|
| Fair Value Measurements Level 2 | Senior Unsecured Notes | 8.125% Senior Notes due 2022 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Fair Value |
30,047
|
57,749
|
|
| Fair Value Measurements Level 2 | Senior Unsecured Notes | 7.5% Senior Notes due 2023 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Fair Value |
34,589
|
58,799
|
|
| Fair Value Measurements Level 2 | Convertible Debt | 8.125% Convertible Senior Notes due 2022 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Fair Value |
2,339
|
44,199
|
|
| Fair Value Measurements Level 2 | Convertible Debt | 7.5% Convertible Senior Notes due 2023 |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis |
|
|
|
| Fair Value |
$ 28
|
$ 15,125
|
|