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Cash, Cash Equivalents and Marketable Securities | 12 Months Ended
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Sep. 30, 2021
Cash and Cash Equivalents [Abstract] |
Cash, Cash Equivalents and Marketable Securities | Cash, Cash Equivalents and Marketable Securities The following is a summary of cash, cash equivalents and marketable securities at September 30, 2021 and 2020:
| September 30, 2021 |  | September 30, 2020
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
| (In thousands)
Cash and Cash Equivalents: |  |  |  |  |  |  |
Cash | $ | 195,160 |  |  | $ | 195,160 |  |  | $ | 122,119 |  |  | $ | 122,119 |
Money market funds | 194 |  |  | 194 |  |  | 35,275 |  |  | 35,275 |
Total | $ | 195,354 |  |  | $ | 195,354 |  |  | $ | 157,394 |  |  | $ | 157,394 |
Long-term Marketable Securities: |  |  |  |  |  |  |
Marketable securities | $ | 23,836 |  |  | $ | 31,884 |  |  | $ | 20,195 |  |  | $ | 25,513 |
The assets included in marketable securities represent long-term marketable equity securities held under a supplemental retirement and savings plan for certain officers and senior management employees, which are distributed upon termination or retirement of the employees. These investments are treated as trading securities and recorded at fair value.

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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