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Subsequent Events (Details) $ in Thousands | 1 Months Ended | 2 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 15, 2018 USD ($) | Oct. 31, 2018 USD ($) | Nov. 15, 2018 USD ($) installment shares | Sep. 30, 2018 USD ($) shares | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($)
Subsequent Event [Line Items] |  |  |  |  |  |
Restructuring and other charges, net |  |  |  | $ (1,003) | $ 7,942 | $ 76,273
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares |  |  |  | 2,190,000 |  |
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Gross |  |  | $ 73,500 |  |  |
Performance-based Award [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares |  |  |  | 961,000 |  |
Performance-based Award [Member] | Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Gross |  |  | $ 31,900 |  |  |
Number of Equal Annual Installments | installment |  |  | 3 |  |  |
Time-based Award [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares |  |  |  | 1,045,000 |  |
Time-based Award [Member] | Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Gross |  |  | $ 41,600 |  |  |
Maximum [Member] | Performance-based Award [Member] | Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares |  |  | 146,000 |  |  |
executive officers [Member] | Performance-based Award [Member] | Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Gross |  |  | $ 31,700 |  |  |
executive officers [Member] | Time-based Award [Member] | Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Target multiplier (up to) |  |  | 1 |  |  |
executive officers [Member] | Maximum [Member] | Time-based Award [Member] | Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares |  |  | 197,000 |  |  |
Chief Executive Officer [Member] | Time-based Award [Member] | Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Target multiplier (up to) |  |  | 2 |  |  |
Line of Credit [Member] | Subsequent Event [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Proceeds from (Repayments of) Lines of Credit | $ 80,000 |  |  |  |  |
Restructuring Plan 2016 [Member] | Subsequent Event [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Restructuring and other charges, net |  | $ 18,000 |  |  |  |

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- Definition The net cash inflow or cash outflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
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