LONG-TERM DEBT (Details) - USD ($)	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Jun. 27, 2020
Long-term debt:
Debt issuance costs	$ (7,189,000)	$ (7,505,000)
Total long-term debt	951,956,000	731,179,000
Less current installments of long-term debt	4,884,000	2,748,000
Long-term debt, excluding current installments	947,072,000	728,431,000
Minimum aggregate maturities of long-term debt
2021	4,884,000
2022	601,000
2023	179,000
2024	20,000
2025	$ 218,897,000
Senior Unsecured Notes 5.00% Due 2044
Long-term debt:
Interest rate on notes	5.00%
Redemption price of notes, stated as a percentage of principal amount	100.00%
Senior Unsecured Notes 5.25% Due 2054
Long-term debt:
Aggregate amount	$ 305,000,000
Interest rate on notes	5.25%
Unamortized debt discount	$ 7,316,000
Redemption price of notes, stated as a percentage of principal amount	100.00%
Unamortized discount on 5.00% and 5.25% senior unsecured notes
Long-term debt:
Unamortized premium on senior unsecured notes	$ (20,436,000)	(20,799,000)
Revolving credit agreement
Long-term debt:
Total long-term debt	218,897,000	$ 0
Outstanding line of credit	744,000
Unused and available borrowings	$ 590,521,000
Revolving credit agreement | Minimum
Long-term debt:
Basis points added to variable rate	0.00%
Revolving credit agreement | Maximum
Long-term debt:
Basis points added to variable rate	0.625%
Revolving credit agreement | Prime lending rate
Long-term debt:
Variable interest rate basis	prime lending rate
Revolving credit agreement | Federal Funds rate
Long-term debt:
Variable interest rate basis	overnight bank rate
Basis points added to variable rate	0.50%
Revolving credit agreement | LIBOR
Long-term debt:
Basis points added to variable rate	1.00%
Debt instrument	SOFR (based on a 1, 3 or 6 month interest period, as selected by the Company)
Revolving credit agreement | LIBOR | Minimum
Long-term debt:
Basis points added to variable rate	1.00%
Revolving credit agreement | LIBOR | Maximum
Long-term debt:
Basis points added to variable rate	1.625%
Revolving credit agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Long-term debt:
Variable interest rate, base period	1 month
Revolving credit agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum
Long-term debt:
Basis points added to variable rate	1.00%
Revolving credit agreement | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Maximum
Long-term debt:
Basis points added to variable rate	1.625%	1.625%
Other notes
Long-term debt:
Total long-term debt	$ 5,684,000	$ 4,483,000
Short Term Bank Lines Of Credit
Long-term debt:
Balance	137,818,000
Unused and available borrowings	124,379,000
Senior Unsecured Notes 5.00% Due 2044
Long-term debt:
Interest rate on notes			5.00%
Senior Unsecured Notes 5.00% Due 2044 | Senior Notes
Long-term debt:
Aggregate amount	450,000,000	450,000,000
Unamortized debt discount	13,120,000
Senior Unsecured Notes 5.25% Due 2054 | Senior Notes
Long-term debt:
Aggregate amount	305,000,000	$ 305,000,000
Revolving Credit Facility
Long-term debt:
Total line of credit facility for short-term borrowings	800,000
Additional borrowing capacity	300,000
Unused and available borrowings	400,000
Revolving Credit Facility | Revolving credit agreement
Long-term debt:
Outstanding line of credit	$ 218,897,000