FAIR VALUE - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Apr. 01, 2017	Jul. 02, 2016	Mar. 26, 2016	Jun. 27, 2015
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	$ 214,063	$ 95,929	$ 106,081	$ 111,840
Restricted cash:
Total assets measured at fair value	186,977	25,716
Quoted Prices in Active Markets for Identical Assets (Level 1)
Restricted cash:
Total assets measured at fair value	96,537	25,716
Significant Other Observable Inputs (Level 2)
Restricted cash:
Total assets measured at fair value	90,440
Commercial Paper
Short-term investments:
Short-term investments	23,961
Commercial Paper | Significant Other Observable Inputs (Level 2)
Short-term investments:
Short-term investments	23,961
Corporate bonds
Short-term investments:
Short-term investments	8,051
Corporate bonds | Significant Other Observable Inputs (Level 2)
Short-term investments:
Short-term investments	8,051
U.S. Treasury securities
Short-term investments:
Short-term investments	3,998
U.S. Treasury securities | Significant Other Observable Inputs (Level 2)
Short-term investments:
Short-term investments	3,998
U.S. agency securities
Short-term investments:
Short-term investments	3,995
U.S. agency securities | Significant Other Observable Inputs (Level 2)
Short-term investments:
Short-term investments	3,995
Money market funds
Restricted cash:
Restricted cash	712	712
Money market funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Restricted cash:
Restricted cash	712	712
Cash-in-bank
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	67,803	70,925
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	95,825	25,004
Cash and cash equivalents:
Cash and cash equivalents	95,825	25,004
Money market funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Cash and cash equivalents:
Cash and cash equivalents	95,825	25,004
Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	19,996	0
Cash and cash equivalents:
Cash and cash equivalents	19,996
Commercial Paper | Significant Other Observable Inputs (Level 2)
Cash and cash equivalents:
Cash and cash equivalents	19,996
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	22,449	0
Cash and cash equivalents:
Cash and cash equivalents	22,449
Corporate bonds | Significant Other Observable Inputs (Level 2)
Cash and cash equivalents:
Cash and cash equivalents	22,449
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	3,995	0
Cash and cash equivalents:
Cash and cash equivalents	3,995
U.S. Treasury securities | Significant Other Observable Inputs (Level 2)
Cash and cash equivalents:
Cash and cash equivalents	3,995
U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	3,995	$ 0
Cash and cash equivalents:
Cash and cash equivalents	3,995
U.S. agency securities | Significant Other Observable Inputs (Level 2)
Cash and cash equivalents:
Cash and cash equivalents	$ 3,995