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CASH, CASH EQUIVALENTS, RESTRICTED CASH AND SHORT-TERM INVESTMENTS (Details) - USD ($) $ in Thousands | Oct. 03, 2020 | Sep. 28, 2019
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Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents, Amortized Cost |  | $ 188,127 |  | $ 364,184
Cash |  | 42,997 |  | 201,005
Total Cash and Cash Equivalents, Amortized Cost |  | 188,137 |  | 364,184
Cash and Cash Equivalents, Gross Unrealized Gain |  | 0 |  | 0
Cash and Cash Equivalents, Gross Unrealized Loss |  | (10) |  | 0
Cash and Cash Equivalents |  | 188,127 |  | 364,184
Short-term investments | [1] | 342,000 |  | 229,000
Available-for-sale Securities, Short-term Investments, Gross Unrealized Gain |  | 0 |  | 0
Available-for-sale Securities, Short-term Investments, Gross Unrealized Loss |  | 0 |  | 0
Available-for-sale Securities, Short-term Investments, Fair Value Disclosure |  | 342,000 |  | 229,000
Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments |  | 530,137 |  | 593,184
Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments, Gross Unrealized Gain |  | 0 |  | 0
Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments, Gross Unrealized Loss |  | (10) |  | 0
Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments, Fair Value Disclosure |  | 530,127 |  | 593,184
Demand Deposits [Member] |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Short-term investments |  | 99,000 | [2],[3] | 99,000
Available-for-sale Securities, Short-term Investments, Gross Unrealized Gain |  | 0 |  | 0
Available-for-sale Securities, Short-term Investments, Gross Unrealized Loss |  | 0 |  | 0
Available-for-sale Securities, Short-term Investments, Fair Value Disclosure | [2],[3] | 99,000 |  | 99,000
Cash [Member] |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents, Amortized Cost |  | 42,997 |  | 201,005
Cash equivalents, Money market funds [Member] |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents, Amortized Cost |  | 105,133 | [4] | 163,172
Cash Equivalents, Gross Unrealized Gain |  | 0 |  | 0
Cash Equivalents, Gross Unrealized Loss |  | (10) | [4] | 0
Cash Equivalents, Fair Value Disclosure | [4] | 105,123 |  | 163,172
Cash equivalents, Time deposits [Member] |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents, Amortized Cost |  | 40,007 | [2] | 7
Cash Equivalents, Gross Unrealized Gain |  | 0 |  | 0
Cash Equivalents, Gross Unrealized Loss |  | 0 |  | 0
Cash Equivalents, Fair Value Disclosure | [2] | 40,007 |  | 7
Short-term investments |  | 243,000 | [2] | 130,000
Available-for-sale Securities, Short-term Investments, Gross Unrealized Gain |  | 0 |  | 0
Available-for-sale Securities, Short-term Investments, Gross Unrealized Loss |  | 0 |  | 0
Available-for-sale Securities, Short-term Investments, Fair Value Disclosure | [2] | $ 243,000 |  | $ 130,000
[1] | All short-term investments were classified as available-for-sale and were measured at fair value based on Level 1 measurement, or quoted market prices, as defined by ASC 820. The Company did not recognize any realized gains or losses on the sale of investments during the fiscal years ended 2020 and 2019.
[2] | Fair value approximates cost basis.
[3] | Represents deposits that require a notice period of three months for withdrawal.
[4] | 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.

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