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CASH, CASH EQUIVALENTS, RESTRICTED CASH AND SHORT-TERM INVESTMENTS | 12 Months Ended
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Sep. 29, 2018
Cash and Cash Equivalents [Abstract] |
CASH AND CASH EQUIVALENTS | CASH, CASH EQUIVALENTS, RESTRICTED CASH AND SHORT-TERM INVESTMENTS Cash equivalents consist of instruments with remaining maturities of three months or less at the date of purchase. In general, these investments are free of trading restrictions. Cash, cash equivalents, restricted cash and short-term investments consisted of the following as of September 29, 2018:
(dollar amounts in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value
Current assets: |  |  |  |  |  |  |
Cash | $ | 42,446 |  |  | $ | — |  |  | $ | — |  |  | $ | 42,446 |
Cash equivalents: |  |  |  |  |  |  |
Money market funds (1) | 209,172 |  |  | — |  |  | (5 | ) |  | 209,167 |
Time deposits (2) | 69,017 |  |  | — |  |  | — |  |  | 69,017 |
Total cash and cash equivalents | $ | 320,635 |  |  | $ | — |  |  | $ | (5 | ) |  | $ | 320,630 |
Restricted Cash (2) | $ | 518 |  |  | $ | — |  |  | $ | — |  |  | $ | 518 |
Total restricted cash | $ | 518 |  |  | $ | — |  |  | $ | — |  |  | $ | 518 |
Short-term investments (2): |  |  |  |  |  |  |
Time deposits | $ | 197,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 197,000 |
Deposits (3) | 96,000 |  |  | — |  |  | — |  |  | 96,000 |
Total short-term investments | $ | 293,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 293,000 |
Total cash, cash equivalents, restricted cash and short-term investments | $ | 614,153 |  |  | $ | — |  |  | $ | (5 | ) |  | $ | 614,148 |
(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 30, 2017:
(dollar amounts in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value
Current assets: |  |  |  |  |  |  |
Cash | $ | 65,759 |  |  | $ | — |  |  | $ | — |  |  | $ | 65,759 |
Cash equivalents (1): |  |  |  |  |  |  |
Money market funds | 232,069 |  |  | — |  |  | — |  |  | 232,069 |
Time deposits | 89,087 |  |  | — |  |  | — |  |  | 89,087 |
Commercial paper | 5,495 |  |  | — |  |  | — |  |  | 5,495 |
Total cash and cash equivalents | $ | 392,410 |  |  | $ | — |  |  | $ | — |  |  | $ | 392,410 |
Restricted Cash (1) | $ | 530 |  |  | $ | — |  |  | $ | — |  |  | $ | 530 |
Total restricted cash | $ | 530 |  |  | $ | — |  |  | $ | — |  |  | $ | 530 |
Short-term investments (1): |  |  |  |  |  |  |
Time deposits | $ | 120,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 120,000 |
Deposits (2) | 96,000 |  |  | — |  |  | — |  |  | 96,000 |
Total short-term investments | $ | 216,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 216,000 |
Total cash, cash equivalents, restricted cash and short-term investments | $ | 608,940 |  |  | $ | — |  |  | $ | — |  |  | $ | 608,940 |
(1) | Fair value approximates cost basis.
(2) | Represents deposits that require a notice period of three months for withdrawal.

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- Definition The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) 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. Generally, only investments maturing within three months from the date of acquisition qualify. + 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 + Details
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