Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) |
1 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Aug. 31, 2018 |
Mar. 31, 2018 |
Feb. 28, 2014 |
Sep. 30, 2019 |
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| 2.00% Convertible Senior Notes Due 2019 [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Debt instrument interest rate | 2.00% | 2.00% | ||
| Debt instrument maturity date | Aug. 15, 2019 | Aug. 15, 2019 | ||
| 2.625% Convertible Senior Notes Due 2024 [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Debt instrument interest rate | 2.625% | 2.625% | ||
| Debt instrument maturity date | Mar. 15, 2024 | Mar. 15, 2024 | ||
| 7.250% Senior Notes Due 2026 [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Debt instrument interest rate | 7.25% | 7.25% | ||
| Debt instrument maturity date | Aug. 15, 2026 | Aug. 15, 2026 | ||
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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