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Contract Balances and Performance Obligation Revenue from Contract with Customer (Tables) | 3 Months Ended
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Dec. 31, 2019
Revenue from Contract with Customer [Abstract] |
Contract with Customer, Asset and Liability | Receivables at December 31, 2019 and September 30, 2019 consisted of the following:
| December 31, 2019 |  | September 30, 2019
| (In thousands)
Billed | $ | 186,330 |  |  | $ | 206,714 |
Unbilled | 134,334 |  |  | 127,651 |
| 320,664 |  |  | 334,365 |
Less: allowance for doubtful accounts | (3,043 | ) |  | (2,568 | )
Net receivables | 317,621 |  |  | 331,797 |
Less: long-term receivables * | (35,981 | ) |  | (34,370 | )
Short-term receivables * | $ | 281,640 |  |  | $ | 297,427 |
(*) Short-term receivables and long-term receivables were recorded in accounts receivable, net and other assets, respectively, within the accompanying condensed consolidated balance sheets. Significant changes in the deferred revenues balances during the quarters ended December 31, 2019 and 2018 were as follows:
| Quarter Ended December 31,
| 2019 |  | 2018
| (In thousands)
Beginning balance | $ | 116,320 |  |  | $ | 108,118 |
Revenue recognized that was included in the deferred revenues balance at the beginning of the period | (47,934 | ) |  | (53,339 | )
Increases due to billings, excluding amounts recognized as revenue during the period | 51,291 |  |  | 53,388 |
Ending balance | $ | 119,677 |  |  | $ | 108,167 |
(*) Ending balance at December 31, 2019 included current portion of $114.7 million and long-term portion of $5.0 million that were recorded in deferred revenue and other liabilities, respectively, within the condensed consolidated balance sheets. Ending balance at December 31, 2018 included current portion of $103.6 million and long-term portion of $4.6 million that were recorded in deferred revenue and other liabilities, respectively, within the condensed consolidated balance sheets.

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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- References No definition available. + Details
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