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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Allowance for Doubtful Accounts |  |  |
Valuation and qualifying accounts [Roll Forward] |  |  |
Balance at Beginning of Period | $ 9,618 | $ 10,846 | $ 11,158
Additions charged to expense |  | 1,736 | 2,787
Additions charged to other Accounts | 0 | 15 | 20
Deductions |  | (2,979) | (3,119)
Balance at End of Period |  | 9,618 | 10,846
Deferred Tax Asset Valuation Allowance |  |  |
Valuation and qualifying accounts [Roll Forward] |  |  |
Balance at Beginning of Period | 22,527 | 15,352 | 15,188
Additions charged to expense | 5,709 | 6,982 | 821
Additions charged to other Accounts | 0 | 0 | 0
Deductions | 383 | 193 | (657)
Balance at End of Period | $ 28,619 | $ 22,527 | $ 15,352

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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