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Derivative Financial Instruments and Fair Value Measurements - Cash Flow Hedges (Details) - Cash Flow Hedging - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021
Interest Rate Cap
Derivative financial instruments
Notional Amount			$ 300.0
Fixed Rate (as a percent)			3.465%
Interest Rate Cap | Maximum
Derivative financial instruments
Fixed Rate (as a percent)			3.465%
Interest Rate Swap
Derivative financial instruments
Notional Amount				$ 400.0
Fixed Rate (as a percent)				1.283%
Designated as Hedging Instrument | Interest Rate Swap | USD | March 2018
Derivative financial instruments
Notional Amount		$ 200.0
Fixed Rate (as a percent)		2.60%
Designated as Hedging Instrument | Interest Rate Swap | USD | February 2023
Derivative financial instruments
Notional Amount	$ 400.0	$ 400.0
Fixed Rate (as a percent)	1.283%	1.349%

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Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480237/815-40-50-5

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Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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