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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Other Intangible Assets [Abstract] |  |
Carrying Amount | $ 593,622 | $ 579,357
Accumulated Amortization | (307,866) | (245,859)
Net | 285,756 | 333,498
Indefinite-lived trade names |  |
Other Intangible Assets [Abstract] |  |
Carrying Amount | 30,540 | 30,540
Net | 30,540 | 30,540
Definite-lived trade names |  |
Other Intangible Assets [Abstract] |  |
Carrying Amount | 148,986 | 148,867
Accumulated Amortization | (93,712) | (64,462)
Net | 55,274 | 84,405
Customer relationships |  |
Other Intangible Assets [Abstract] |  |
Carrying Amount | 390,253 | 379,246
Accumulated Amortization | (198,793) | (166,892)
Net | 191,460 | 212,354
Copyrights/patents/other |  |
Other Intangible Assets [Abstract] |  |
Carrying Amount | 23,843 | 20,704
Accumulated Amortization | (15,361) | (14,505)
Net | $ 8,482 | $ 6,199

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- Definition Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives, and the carrying amount of any indefinite-lived intangible assets. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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