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Long-Term Debt Obligations - 2019 Notes - Additional Information (Detail) $ in Millions | 3 Months Ended
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Mar. 31, 2019 USD ($)
Senior Notes [Member] | 0.25% Convertible Senior Notes due in 2019 ("2019 Notes") [Member] |
Debt Instrument [Line Items] |
Repayment of aggregate principal amount | $ 920.0

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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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