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Income Taxes - Summary of Information Included in Continuing Operations Related to Interest on Uncertain Tax Positions (Detail) - USD ($) $ in Millions | 6 Months Ended |
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Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |
Interest expense (income) | $ 0.4 | $ 0.2 |
Accrued interest payable | $ 2.2 |  | $ 1.8

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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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