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Schedule of Fair Value of Notes (Detail) - USD ($) $ in Thousands | Oct. 07, 2017 | Dec. 31, 2016
--- | --- | ---
2026 Notes |  |
Fair Value Disclosures [Line Items] |  |
Carrying Value | $ 394,847 | $ 394,406
2026 Notes | Level 2 Inputs |  |
Fair Value Disclosures [Line Items] |  |
Fair Value | 395,472 |
2022 Notes |  |
Fair Value Disclosures [Line Items] |  |
Carrying Value | 397,828 | $ 397,458
2022 Notes | Level 2 Inputs |  |
Fair Value Disclosures [Line Items] |  |
Fair Value | $ 426,188 |

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- Definition Fair value disclosures. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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