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CASH, CASH EQUIVALENTS, RESTRICTED CASH AND SHORT-TERM INVESTMENTS (Details) - USD ($)
$ in Thousands
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Cash and Cash Equivalents [Line Items]        
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 293,000 216,000    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 321,148 392,940 $ 423,907 $ 498,614
Short-term investments 293,000 216,000    
Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments 614,153 608,940    
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 (5) 0    
Cash and cash equivalents, Amortized Cost 320,630 392,410    
Cash 42,446 65,759    
Cash and Cash Equivalents, Amortized Cost 320,635 392,410    
Cash and Cash Equivalents, Gross Unrealized Gain 0 0    
Cash and Cash Equivalents, Gross Unrealized Loss (5) 0    
Cash and Cash Equivalents 320,630 392,410    
Restricted cash 518 530    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Amortized Cost 518 530    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Gross Unrealized Gain 0 0    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Gross Unrealized Loss 0 0    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Fair Value Disclosure 518 530    
Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents, and Short-Term Investments, Fair Value Disclosure 614,148 608,940    
Demand Deposits [Member]        
Cash and Cash Equivalents [Line Items]        
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 96,000 96,000    
Short-term investments 96,000 96,000    
Cash [Member]        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents, Amortized Cost 42,446 65,759    
Cash equivalents, Money market funds [Member]        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents, Amortized Cost 209,172 232,069    
Cash Equivalents, Gross Unrealized Gain 0 0    
Cash Equivalents, Gross Unrealized Loss (5) 0    
Cash Equivalents, Fair Value Disclosure 209,167 232,069    
Cash equivalents, Time deposits [Member]        
Cash and Cash Equivalents [Line Items]        
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 197,000 120,000    
Short-term investments 197,000 120,000 [1]    
Cash and cash equivalents, Amortized Cost 69,017 89,087    
Cash Equivalents, Gross Unrealized Gain 0 0    
Cash Equivalents, Gross Unrealized Loss 0 0    
Cash Equivalents, Fair Value Disclosure $ 69,017 89,087    
Commercial Paper [Member]        
Cash and Cash Equivalents [Line Items]        
Cash and cash equivalents, Amortized Cost   5,495    
Cash Equivalents, Gross Unrealized Gain   0    
Cash Equivalents, Gross Unrealized Loss   0    
Cash Equivalents, Fair Value Disclosure   $ 5,495    
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