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v3.20.4

Income Taxes - Effective Rate Reconciliation (Details) | 12 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Operating Loss Carryforwards [Line Items] |  |  |
Federal statutory rate effect of: | 21.00% | 21.00% | 24.50%
U.S. State and local income taxes | 1.00% | (1.50%) | 0.80%
Foreign earnings and losses taxed at different rates | 0.10% | 0.70% | (0.80%)
U.S. permanent items | 0.90% | 0.10% | (0.20%)
Foreign permanent items | 0.50% | 0.70% | 2.10%
U.S. bargain purchase gain | (8.30%) | (1.00%) | 0.00%
Remeasurement of deferred tax | 0.00% | 0.00% | 8.50%
Repatriation Transition tax | 0.00% | 0.00% | 11.00%
GILTI | 0.70% | 2.20% | 0.00%
Other reconciling items | 0.90% | (0.40%) | 0.20%
Effective rate | 18.00% | 23.30% | 45.30%
Foreign Tax Authority [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Change in foreign and state valuation allowance | 1.00% | 1.00% | (0.80%)
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Change in foreign and state valuation allowance | 0.20% | 0.50% | 0.00%

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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