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LONG-TERM DEBT AND FINANCE LEASE OBLIGATIONS - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands | Jun. 26, 2021 | Mar. 27, 2021 | Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
--- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, gross | $ 2,725,755 |  |  |  |
Finance leases | 29,153 |  | $ 29,047 |  |
Total debt and finance leases | 2,754,908 |  | 1,994,131 |  |
Current portion of long-term debt | 108 |  | 47,196 |  |
Current portion of finance leases | 2,913 |  | 3,018 |  |
Current portion of long-term debt and finance leases | 3,021 |  | 50,214 |  |
Long-term debt and finance leases | 2,751,887 |  | 1,943,917 |  |
Debt discount and debt issuance costs | (24,647) |  | (14,346) |  |
Long-term debt, net and finance leases | 2,727,240 |  | 1,929,571 |  |
Term Loans |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, gross | 0 |  | 146,875 |  |
Revolving Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, gross | $ 1,225,383 |  | $ 814,752 |  |
Senior Notes | 5.5% Senior Notes due 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate | 5.50% |  | 5.50% |  | 5.50%
Long-term debt, gross | $ 0 |  | $ 500,000 |  |
Senior Notes | 4.25% Senior Notes due 2028 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate | 4.25% |  | 4.25% | 4.25% |
Long-term debt, gross | $ 500,000 |  | $ 500,000 |  |
Senior Notes | 3.75% Senior Notes due 2029 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate | 3.75% | 3.75% | 3.75% |  |
Long-term debt, gross | $ 500,000 |  | $ 0 |  |
Senior Notes | 4.0% Senior Notes due 2031 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate | 4.00% | 4.00% | 4.00% |  |
Long-term debt, gross | $ 500,000 |  | $ 0 |  |
Other Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, gross | $ 372 |  | $ 3,457 |  |

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