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Intangibles, net (Tables) | 3 Months Ended
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Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract] |
Intangible Assets Subject to Amortization | The gross carrying amount and accumulated amortization of intangible assets subject to amortization are as follows (in thousands):
|  | December 31, 2018 |  |  | September 30, 2018 |
|  | Gross |  |  |  |  |  |  |  |  |  |  | Gross |  |  |  |  |  |  |  |  |
|  | Carrying |  |  | Accum. |  |  |  |  |  |  | Carrying |  |  | Accum. |  |  |  |  |
|  | Amount |  |  | Amortization |  |  | Net |  |  | Amount |  |  | Amortization |  |  | Net |
Customer lists |  | $ | 359,073 |  |  | $ | 284,098 |  |  | $ | 74,975 |  |  | $ | 358,776 |  |  | $ | 279,990 |  |  | $ | 78,786 |
Trade names and other intangibles |  |  | 32,739 |  |  |  | 13,595 |  |  |  | 19,144 |  |  |  | 32,739 |  |  |  | 13,081 |  |  |  | 19,658 |
Total |  | $ | 391,812 |  |  | $ | 297,693 |  |  | $ | 94,119 |  |  | $ | 391,515 |  |  | $ | 293,071 |  |  | $ | 98,444 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + 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) -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 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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