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Fair Value Measurements (Tables) | 12 Months Ended
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Sep. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value of Assets and Liabilities Measured on Recurring Basis | The following table summarizes the fair value of our assets and liabilities that were accounted for at fair value on a recurring basis as of September 30, 2018 (in thousands):
| Fair Value Measurements at September 30, 2018
| Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Fair Value at September 30, 2018
Assets: |  |  |  |  |  |  |
Cash and cash equivalents | $ | 36,584 |  |  | $ | — |  |  | $ | — |  |  | $ | 36,584 |
Short-term investments | 13,170 |  |  | — |  |  | — |  |  | 13,170 |
Restricted cash | 25,141 |  |  | — |  |  | — |  |  | 25,141 |
Other assets | — |  |  | 6,817 |  |  | — |  |  | 6,817 |
Liabilities: |  |  |  |  |  |  |
Deferred compensation | — |  |  | 5,644 |  |  | — |  |  | 5,644 |
The following table summarizes the fair value of our assets and liabilities that were accounted for at fair value on a recurring basis as of September 30, 2017 (in thousands):
| Fair Value Measurements at September 30, 2017
| Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Fair Value at September 30, 2017
Assets: |  |  |  |  |  |  |
Cash and cash equivalents | $ | 68,359 |  |  | $ | — |  |  | $ | — |  |  | $ | 68,359 |
Short-term investments | 26,829 |  |  | — |  |  | — |  |  | 26,829 |
Restricted cash | 24,851 |  |  | — |  |  | — |  |  | 24,851 |
Other assets | — |  |  | 6,442 |  |  | — |  |  | 6,442 |
Liabilities: |  |  |  |  |  |  |
Deferred compensation | — |  |  | 4,991 |  |  | — |  |  | 4,991 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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