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Goodwill and Acquired Intangible Assets (Narrative) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2019 USD ($) Segment | Sep. 30, 2017 Segment | Sep. 30, 2018 USD ($)
Number of operating segments | Segment | 2 | 3 |
Number of reportable segments | Segment | 2 |  |
Intangible Assets, Net (Including Goodwill) | $ 1,408,128 |  | $ 1,382,659
Estimated aggregate future amortization expense for intangible assets, 2020 | 49,000 |  |
Estimated aggregate future amortization expense for intangible assets, 2021 | 43,800 |  |
Estimated aggregate future amortization expense for intangible assets, 2022 | 30,800 |  |
Estimated aggregate future amortization expense for intangible assets, 2023 | 19,000 |  |
Estimated aggregate future amortization expense for intangible assets, 2024 | 8,400 |  |
Estimated aggregate future amortization expense for intangible assets, thereafter | 18,900 |  |
Professional Services [Member] |  |  |
Intangible Assets, Net (Including Goodwill) | 45,700 |  | 30,200
Software Products [Member] |  |  |
Intangible Assets, Net (Including Goodwill) | $ 1,362,400 |  | $ 1,352,400

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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. + References No definition available. + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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