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Income Taxes - Unrecognized Tax Benefits - Interest Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Jun. 30, 2021 | Jun. 30, 2021
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract] |  |
Interest related to unrecognized benefits | $ 0.1 | $ 0.1

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- References No definition available. + Details
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- Definition Amount of interest expense 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 https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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