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Cash, Cash Equivalents and Marketable Securities Available for Sale | 12 Months Ended
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Sep. 30, 2017
Cash and Cash Equivalents [Abstract] |
Cash, Cash Equivalents and Marketable Securities Available for Sale | Cash, Cash Equivalents and Marketable Securities Available for Sale The following is a summary of cash, cash equivalents and marketable securities available for sale at September 30, 2017 and 2016:
| September 30, 2017 |  | September 30, 2016
| Amortized Cost |  | Gross Unrealized Gains |  | Fair Value |  | Amortized Cost |  | Gross Unrealized Gains |  | Fair Value
| (In thousands)
Cash and Cash Equivalents: |  |  |  |  |  |  |  |  |  |  |
Cash | $ | 90,323 |  |  | $ | — |  |  | $ | 90,323 |  |  | $ | 75,486 |  |  | $ | — |  |  | $ | 75,486 |
Money market funds | 6,471 |  |  | — |  |  | 6,471 |  |  | 440 |  |  | — |  |  | 440 |
Bank time deposits | 8,824 |  |  | — |  |  | 8,824 |  |  | — |  |  | — |  |  | — |
Total | $ | 105,618 |  |  | $ | — |  |  | $ | 105,618 |  |  | $ | 75,926 |  |  | $ | — |  |  | $ | 75,926 |
Long-term Marketable Securities: |  |  |  |  |  |  |  |  |  |  |
Marketable equity securities | $ | 10,788 |  |  | $ | 3,003 |  |  | $ | 13,791 |  |  | $ | 9,598 |  |  | $ | 1,418 |  |  | $ | 11,016 |
The long-term marketable equity securities represent securities held under a supplemental retirement and savings plan for senior management employees, which are distributed upon termination or retirement of the employees.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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