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Derivatives - Additional Information (Detail) - 1 months ended Aug. 31, 2019 - Cross Currency Swap Assets [Member] | USD ($) | GBP (£) | GBP (£)
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Derivative [Line Items] |  |  |
Notional amount | $ 650,000,000.0 |  | £ 538,100,000
Cross currency swap agreement cash flow due to interest payment | $ 35,800,000 | £ 25,400,000 |

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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. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
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- Details
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