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SUPPLEMENTAL CASH FLOW INFORMATION (Tables) | 12 Months Ended
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Sep. 30, 2019
Supplemental Cash Flow Information [Abstract] |
Changes in Working Capital Items as Presented in the Consolidated Statements of Cash Flows | Changes in working capital items as presented in the Consolidated Statements of Cash Flows consisted of the following:
| 2019 |  | 2018 |  | 2017
Current assets: |  |  |  |  |
Accounts receivable | $ | 8,779 |  |  | $ | (790 | ) |  | $ | (7,045 | )
Inventories | 830 |  |  | (2,869 | ) |  | (2,289 | )
Other current assets | 10,317 |  |  | (16,293 | ) |  | 4,447 |
| 19,926 |  |  | (19,952 | ) |  | (4,887 | )
Current liabilities: |  |  |  |  |  |  |  |
Trade accounts payable | 3,715 |  |  | 2,516 |  |  | 5,672 |
Accrued compensation | (8,832 | ) |  | (10,940 | ) |  | (2,469 | )
Accrued income taxes | (5,416 | ) |  | (9,973 | ) |  | 5,054 |
Other current liabilities | (21,875 | ) |  | 28,415 |  |  | 2,414 |
| (32,408 | ) |  | 10,018 |  |  | 10,671 |
Net change | $ | (12,482 | ) |  | $ | (9,934 | ) |  | $ | 5,784 |

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