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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Significant Accounting Policies [Line Items] |  |  |
Amortization expense for the deferred costs | $ 9.0 | $ 7.7 |
Other Assets [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Deferred costs | $ 101.0 |  | $ 106.4

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- Definition Significant accounting policies. + References No definition available. + Details
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- Definition The amount of amortization of deferred charges applied against earnings during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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