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Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Assets: |  |
Cash and cash equivalents | $ 114,314 | $ 160,216
Short-term investments | 19,667 | 18,705
Other assets | 9,100 | 7,351
Liabilities: |  |
Deferred compensation | 8,527 | 6,569
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Cash and cash equivalents | 114,314 | 160,216
Short-term investments | 19,667 | 18,705
Other assets | 0 | 0
Liabilities: |  |
Deferred compensation | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Cash and cash equivalents | 0 | 0
Short-term investments | 0 | 0
Other assets | 9,100 | 7,351
Liabilities: |  |
Deferred compensation | 8,527 | 6,569
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Cash and cash equivalents | 0 | 0
Short-term investments | 0 | 0
Other assets | 0 | 0
Liabilities: |  |
Deferred compensation | $ 0 | $ 0

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- Definition Short-term Investments, Fair Value Disclosure + References No definition available. + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References No definition available. + Details
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