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Income Taxes (Tables) | 12 Months Ended
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Sep. 30, 2017
Income Taxes [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  |  | Years Ended September 30,
|  |  | 2017 |  | 2016 |  | 2015
Federal: |  |  |  |  |  |  |  |  |
| Current |  | $ | (3,092) |  | $ | 762 |  | $ | 417
| Deferred |  |  | 6,384 |  |  | (97,093) |  |  | (564)
State: |  |  |  |  |  |  |  |  |
| Current |  |  | 1,432 |  |  | 952 |  |  | 729
| Deferred |  |  | 487 |  |  | (1,738) |  |  | 79
|  |  | $ | 5,211 |  | $ | (97,117) |  | $ | 661
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  |  | Years Ended September 30,
|  |  | 2017 |  | 2016 |  | 2015
Provision (benefit) at the statutory rate |  | $ | 6,582 |  | $ | 8,316 |  | $ | 6,139
Increase resulting from: |  |  |  |  |  |  |  |  |
| Alternative minimum tax |  |  | - |  |  | - |  |  | 417
| Non-deductible expenses |  |  | 966 |  |  | 1,557 |  |  | 753
| Long-lived assets |  |  | - |  |  | - |  |  | 69
| State income taxes, net of federal deduction |  |  | 1,003 |  |  | 1,105 |  |  | 937
| Change in valuation allowance |  |  | 142 |  |  |  |  |  |
| Contingent tax liabilities |  |  | - |  |  | - |  |  | 51
| Other |  |  | 17 |  |  | - |  |  | 54
Decrease resulting from: |  |  |  |  |  |  |  |  |
| Change in valuation allowance |  |  | - |  |  | (108,987) |  |  | (7,034)
| Valuation allowance adjustment - acquisitions |  |  | - |  |  | - |  |  | (725)
| Contingent tax liabilities |  |  | (3,499) |  |  | (96) |  |  | -
| Other |  |  | - |  |  | 988 |  |  | -
|  |  | $ | 5,211 |  | $ | (97,117) |  | $ | 661
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  |  |  | Years Ended September 30,
|  |  |  | 2017 |  | 2016
Deferred income tax assets: |  |  |  |  |  |
| Allowance for doubtful accounts |  | $ | 243 |  | $ | 280
| Accrued expenses |  |  | 12,915 |  |  | 10,729
| Net operating loss carryforward |  |  | 77,497 |  |  | 86,280
| Various reserves |  |  | 1,807 |  |  | 1,410
| Equity losses in affiliate |  |  | 82 |  |  | 84
| Share-based compensation |  |  | 1,570 |  |  | 1,012
| Capital loss carryforward |  |  | 337 |  |  | 338
| Other |  |  | 3,195 |  |  | 3,185
Subtotal |  |  | 97,646 |  |  | 103,318
Less valuation allowance |  |  | 2,366 |  |  | 2,224
Total deferred income tax assets |  | $ | 95,280 |  | $ | 101,094
Deferred income tax liabilities: |  |  |  |  |  |
| Property and equipment |  | $ | 2,019 |  | $ | 1,517
| Intangible assets |  |  | 6,548 |  |  | 5,629
| Other |  |  | 502 |  |  | 399
Total deferred income tax liabilities |  |  | 9,069 |  |  | 7,545
Net deferred income tax assets |  | $ | 86,211 |  | $ | 93,549
Schedule Of Unrecognized Tax Benefits Roll Forward Table[Text Block] |
| Years Ended September 30,
| 2017 |  | 2016 |
Balance at October 1, | $ | 55,867 |  | $ | 55,963 |
Additions for position related to current year |  | 207 |  |  | - |
Additions for positions of prior years |  | - |  |  | - |
Reduction resulting from the lapse of the applicable statutes of limitations |  | 3,707 |  |  | 27 |
Reduction resulting from positions of prior years |  | 399 |  |  | 69 |
Reduction resulting from settlement of positions of prior years |  | - |  |  | - |
Balance at September 30, | $ | 51,968 |  | $ | 55,867 |

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