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Income Taxes (Tables)
12 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Year Ended September 30,
202120202019
Federal:
Current$$(39)$(1,330)
Deferred11,678 9,317 5,908 
State:
Current4,505 3,657 2,312 
Deferred46 (4,195)(227)
Total provision for income taxes$16,231 $8,740 $6,663 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Year Ended September 30,
202120202019
Provision at the federal statutory rate$17,830 $10,352 $8,430 
Increase resulting from:
Non-deductible expenses658 1,974 1,277 
State income taxes, net of federal deduction3,876 2,662 2,009 
Other— 261 — 
Decrease resulting from:
Share-based compensation(715)(75)(556)
Change in valuation allowance(118)(3,334)(83)
Contingent tax liabilities(2,898)(1,313)(3,967)
Component 2 goodwill utilization(2,241)(1,787)(144)
Other(161)— (303)
Total provision for income taxes$16,231 $8,740 $6,663 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Year Ended September 30,
20212020
Deferred income tax assets:
Allowance for credit losses$541 $592 
Accrued expenses17,134 14,619 
Net operating loss carryforward6,445 22,623 
Various reserves1,285 1,764 
Equity losses in affiliate210 210 
Share-based compensation1,079 897 
Capital loss carryforward74 
Lease asset9,634 7,681 
Other2,914 2,444 
Subtotal39,243 50,904 
Less valuation allowance592 710 
Total deferred income tax assets38,651 50,194 
Deferred income tax liabilities:
Property and equipment509 517 
Intangible assets8,765 7,926 
Lease liability9,615 7,677 
Other753 271 
Total deferred income tax liabilities19,642 16,391 
Net deferred income tax assets$19,009 $33,803 
Summary of Income Tax Contingencies [Table Text Block]
Year Ended September 30,
20212020
Balance at beginning of period$24,861 $26,294 
Additions for position related to current year59 111 
Additions for positions of prior years20 29 
Reduction resulting from the lapse of the applicable statutes of limitations3,061 1,573 
Balance at end of period$21,879 $24,861