Long-Term Debt - Term Loans (Details) - USD ($)	3 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt issuance costs, net	$ 5,000,000	$ 6,000,000
Term Loan A \| Loans Payable
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	1.41%
2020 Term Loan
Debt Instrument [Line Items]
Debt instrument, interest rate, effective percentage	2.25%
Debt issuance costs, net	$ 1,000,000
2020 Term Loan \| Loans Payable \| Reflexis
Debt Instrument [Line Items]
Debt instrument, face amount	200,000,000
Repayments of debts	$ 100,000,000

Face (par) amount of debt instrument at time of issuance.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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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.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

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-Publisher FASB
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