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Revenue from Contracts with Customers Contract Balances (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019 | Sep. 30, 2018
Contract with Customer, Asset and Liability [Abstract] |  |  |
Receivables, which are included in “Accounts receivable, net” |  | $ 321,483 | $ 270,181
Deferred revenue | $ 108,118 | $ 107,871 | $ 108,118
Contract With Customer, Liability [Roll Forward] |  |  |
Deferred revenues, beginning balance | 108,118 |  |
Revenue recognized that was included in the deferred revenues balance at the beginning of the period | (87,600) |  |
Increases due to billings, excluding amounts recognized as revenue during the period | 87,353 |  |
Deferred revenues, ending balance | $ 107,871 |  |
Minimum |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Payment term | 30 days |  |
Maximum |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Payment term | 60 days |  |

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- Definition Deferred Revenue Increased from Customer Contracts due to cash received + References No definition available. + Details
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- Definition Contract With Customer, Liability [Roll Forward] + References No definition available. + Details
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- Definition Contract With Customer, Payment Term + References No definition available. + Details
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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044 + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 + Details
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