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CASH, CASH EQUIVALENTS, RESTRICTED CASH AND SHORT-TERM INVESTMENTS (Tables) | 6 Months Ended
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Mar. 28, 2020
Cash and Cash Equivalents [Abstract] |
Cash, cash equivalents, restricted cash and short-term investments | Cash, cash equivalents, and short-term investments consisted of the following as of March 28, 2020:
(in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value
Current assets: |  |  |  |  |  |  |
Cash | $ | 225,849 |  |  | $ | — |  |  | $ | — |  |  | $ | 225,849 |
Cash equivalents: |  |  |  |  |  |  |
Money market funds (1) | 166,451 |  |  | — |  |  | — |  |  | 166,451 |
Time deposits (2) | 7 |  |  | — |  |  | — |  |  | 7 |
Total cash and cash equivalents | $ | 392,307 |  |  | $ | — |  |  | $ | — |  |  | $ | 392,307 |
Short-term investments (2): |  |  |  |  |  |  |
Time deposits | 149,000 |  |  | — |  |  | — |  |  | 149,000 |
Deposits (3) | 99,000 |  |  | — |  |  | — |  |  | 99,000 |
Total short-term investments | $ | 248,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 248,000 |
Total cash, cash equivalents, and short-term investments | $ | 640,307 |  |  | $ | — |  |  | $ | — |  |  | $ | 640,307 |
(1) | The fair value was determined using unadjusted prices in active, accessible markets for identical assets, and as such they were classified as Level 1 assets in the fair value hierarchy.
(2) | Fair value approximates cost basis.
(3) | Represents deposits that require a notice period of three months for withdrawal.
Cash, cash equivalents, restricted cash and short-term investments consisted of the following as of September 28, 2019:
(in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value
Current assets: |  |  |  |  |  |  |
Cash | $ | 201,005 |  |  | $ | — |  |  | $ | — |  |  | $ | 201,005 |
Cash equivalents: |  |  |  |  |  |  |
Money market funds (1) | 163,172 |  |  | — |  |  | — |  |  | 163,172 |
Time deposits (2) | 7 |  |  | — |  |  | — |  |  | 7 |
Total cash and cash equivalents | $ | 364,184 |  |  | $ | — |  |  | $ | — |  |  | $ | 364,184 |
Short-term investments (2): |  |  |  |  |  |  |
Time deposits | 130,000 |  |  | — |  |  | — |  |  | 130,000 |
Deposits (3) | 99,000 |  |  | — |  |  | — |  |  | 99,000 |
Total short-term investments | $ | 229,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 229,000 |
Total cash, cash equivalents, restricted cash and short-term investments | $ | 593,184 |  |  | $ | — |  |  | $ | — |  |  | $ | 593,184 |
(1) | The fair value was determined using unadjusted prices in active, accessible markets for identical assets, and as such they were classified as Level 1 assets in the fair value hierarchy.
(2) | Fair value approximates cost basis.
(3) Represents deposits that require a notice period of three months for withdrawal.

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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