Income Taxes - Reconciliation (Details)	3 Months Ended	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2021
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Tax at statutory rate	21.00%	21.00%	21.00%
Nondeductible compensation	0.20%	0.10%	(1.00%)
Transaction costs	0.00%	0.00%	(1.50%)
Share-based compensation	0.00%	(0.30%)	(0.10%)
State income taxes, net of federal benefit	0.70%	0.70%	0.40%
Change in tax status	0.00%	0.00%	(40.10%)
Income subject to taxation by REP LLC's unitholders	0.00%	0.00%	(17.10%)
Other	(0.20%)	0.00%	0.00%
Effective income tax rate	21.70%	21.50%	(38.40%)

Effective Income Tax Rate Reconciliation, Change in Tax Status, Percent

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Effective Income Tax Rate Reconciliation, Income Subject To Taxation, Percent

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Effective Income Tax Rate Reconciliation, Nondeductible Expense, Compensation, Percent

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Effective Income Tax Rate Reconciliation, Transaction Costs, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 740
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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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