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Income Taxes (Tables) | 12 Months Ended
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Sep. 30, 2023
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
| Year Ended September 30,
| 2023 |  | 2022 |  | 2021
Federal: |  |  |  |  |
Current | $ | 27,205 |  |  | $ | 9,401 |  |  | $ | 2 |
Deferred | 4,300 |  |  | 3 |  |  | 11,678 |
State: |  |  |  |  |
Current | 6,370 |  |  | 3,445 |  |  | 4,505 |
Deferred | 886 |  |  | (34) |  |  | 46 |
Total provision for income taxes | $ | 38,761 |  |  | $ | 12,815 |  |  | $ | 16,231 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
| Year Ended September 30,
| 2023 |  | 2022 |  | 2021
Provision at the federal statutory rate | $ | 33,295 |  |  | $ | 11,130 |  |  | $ | 17,830 |
Increase resulting from: |  |  |  |  |
Non-deductible expenses | 2,017 |  |  | 1,610 |  |  | 1,086 |
State income taxes, net of federal deduction | 6,338 |  |  | 2,114 |  |  | 3,876 |
Contingent tax liabilities | 396 |  |  | — |  |  | — |
Change in valuation allowance | — |  |  | 283 |  |  | — |
Other | — |  |  | 427 |  |  | — |
Decrease resulting from: |  |  |  |  |
Share-based compensation | (332) |  |  | (665) |  |  | (715) |
Noncontrolling interest | (2,415) |  |  | (1,139) |  |  | (428) |
Change in valuation allowance | (52) |  |  | — |  |  | (118) |
Contingent tax liabilities | — |  |  | (133) |  |  | (2,898) |
Component 2 goodwill utilization | — |  |  | (812) |  |  | (2,241) |
Other | (486) |  |  | — |  |  | (161) |
Total provision for income taxes | $ | 38,761 |  |  | $ | 12,815 |  |  | $ | 16,231 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
| September 30,
| 2023 |  | 2022
Deferred income tax assets: |  |  |
Allowance for credit losses | $ | 349 |  |  | $ | 1,246 |
Accrued expenses | 18,167 |  |  | 18,645 |
Net operating loss carryforward | 4,224 |  |  | 4,542 |
Various reserves | 1,718 |  |  | 1,318 |
Equity losses in affiliate | — |  |  | 125 |
Share-based compensation | 1,298 |  |  | 1,142 |
Capital loss carryforward | — |  |  | 82 |
Lease asset | 14,207 |  |  | 12,534 |
Other | 8,596 |  |  | 4,236 |
Subtotal | 48,559 |  |  | 43,870 |
Less valuation allowance | 823 |  |  | 875 |
Total deferred income tax assets | 47,736 |  |  | 42,995 |
Deferred income tax liabilities: |  |  |
Property and equipment | 2,231 |  |  | 126 |
Intangible assets | 9,984 |  |  | 9,044 |
Lease liability | 14,102 |  |  | 12,500 |
Other | 1,036 |  |  | 806 |
Total deferred income tax liabilities | 27,353 |  |  | 22,476 |
Net deferred income tax assets | $ | 20,383 |  |  | $ | 20,519 |
Summary of Income Tax Contingencies [Table Text Block] |
| Year Ended September 30,
| 2023 |  | 2022
Balance at beginning of period | $ | 21,746 |  |  | $ | 21,879 |
Additions for positions of prior years | 819 |  |  | 26 |
Reduction resulting from the lapse of the applicable statutes of limitations | (218) |  |  | (159) |
Balance at end of period | $ | 22,347 |  |  | $ | 21,746 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 9 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 19 -SubTopic 10 -Topic 740 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-19 + Details
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