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Accrued Liabilities (Accrued Liabilities) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2016
--- | --- | --- | --- | --- | --- | ---
Accrued Liabilities [Line Items] |  |  |  |  |  |
Salaries and other member benefits | $ 63,743 |  | $ 91,285 |  |  |
Warranties | 19,802 | $ 13,283 | 13,597 | $ 14,298 | $ 15,041 | $ 15,993
Interest payable | 8,856 |  | 9,626 |  |  |
Current portion of acquired performance obligations and unfavorable contracts | 1,627 |  | 1,627 |  |  |
Accrued retirement benefits | 3,529 |  | 2,413 |  |  |
Current portion of deferred income from JV formation (Note 4) | 6,414 |  | 6,451 |  |  |
Deferred revenues | 2,689 |  | 4,625 |  |  |
Taxes, other than income | 18,012 |  | 14,401 |  |  |
Other | 19,720 |  | 9,704 |  |  |
Accrued liabilities | 162,211 |  | 155,072 |  |  |
Loss Reserve On Contractual Lease Commitments [Member] |  |  |  |  |  |
Accrued Liabilities [Line Items] |  |  |  |  |  |
Restructuring Reserve, Current | 1,245 |  | $ 1,343 |  |  |
Employee Severance [Member] |  |  |  |  |  |
Accrued Liabilities [Line Items] |  |  |  |  |  |
Restructuring Reserve, Current | $ 16,574 |  |  |  |  |

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- Definition The current liabilities recognized in the balance sheet that are associated with unfavorable contracts assumed in an acquisition of an entity as well as commitments for the acquired entity to continue to provide services to the seller of the acquired entity, for which the company will be paid by the seller of the acquired entity. + References No definition available. + Details
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