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Long-Term Debt - Long-term Debt (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Debt issuance costs, net of amortization |  | $ (8,408) |
Long-term Debt |  | 1,153,333 | $ 1,110,529
10% Senior Secured Toggle Notes due 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  | 697,195 |
Discount, net of amortization |  | (7,070) |
7¾% Convertible Second Lien PIK Notes due 2019 |  |  |
Debt Instrument [Line Items] |  |  |
Principal | [1] | 295,465 |
Accrued interest payable in kind | [1] | 5,693 |
Discount, net of amortization | [1] | (24,821) |
9½% Convertible Second Lien PIK Notes due 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  | 195,948 |
Accrued interest payable in kind |  | 801 |
Discount, net of amortization |  | (27,077) |
10% Senior Notes due 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  | 2,805 |
7¾% Senior Notes due 2019 |  |  |
Debt Instrument [Line Items] |  |  |
Principal | [1] | 17,959 |
Premium, net of amortization | [1] | 39 |
9½% Senior Notes due 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Principal |  | 4,860 |
Discount, net of amortization |  | $ (56) |
[1] | Classified as long-term debt as the Company intends to refinance this debt with new long-term debt - See Footnote 5-Jones Contribution and Financing Plans.

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