Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
OPERATING ACTIVITIES
Net income	$ 430,914	$ 381,524	$ 192,106
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	57,453	49,609	45,855
Non-cash interest charges	355	447	334
Provisions for losses on trade and other accounts receivable	12,220	5,722	9,415
Gains on sales/disposals of operating property	(2,944)	(1,830)	(2,576)
Impairment of intangible and other assets	0	0	2,582
Deferred income taxes, net	(5,360)	(3,790)	1,130
Stock-based compensation	12,399	27,537	4,639
Changes in operating assets and liabilities:
Decrease (increase) in trade and other accounts receivable	219,190	(362,234)	(285,169)
(Increase) decrease in other assets	(5,938)	4,444	(4,719)
(Decrease) increase in accounts payable	(76,758)	224,125	108,090
(Decrease) increase in other liabilities	(31,571)	43,422	28,496
Increase (decrease) in insurance claims	12,699	(92,236)	110,534
NET CASH PROVIDED BY OPERATING ACTIVITIES	622,659	276,740	210,717
INVESTING ACTIVITIES
Net change in other short-term investments	0	0	131
Sales and maturities of investments	41,198	31,938	22,632
Purchases of investments	(40,202)	(84,992)	(25,550)
Purchases of operating property	(26,005)	(23,261)	(30,626)
Proceeds from sales of operating property	5,236	2,971	7,760
Consideration paid for acquisition	0	0	(2,766)
Purchase of non-marketable securities	(4,999)	0	0
NET CASH USED BY INVESTING ACTIVITIES	(24,772)	(73,344)	(28,419)
FINANCING ACTIVITIES
(Decrease) increase in cash overdraft	(23,525)	41,730	20,870
Dividends paid	(115,671)	(111,961)	(109,504)
Payment for debt issue costs	(1,080)	0	(1,132)
Proceeds from exercises of stock options	68	160	725
Taxes paid in lieu of shares issued related to stock-based compensation plans	(10,428)	(2,342)	(3,326)
Purchases of common stock	(285,983)	(122,722)	(115,962)
Principal payments on finance lease obligations	(39,063)	(37,644)	(43,703)
Payment of deferred consideration	0	(168)	0
NET CASH USED BY FINANCING ACTIVITIES	(475,682)	(232,947)	(252,032)
Effect of exchange rate changes on cash and cash equivalents	(2,195)	(232)	(427)
Increase (decrease) in cash, cash equivalents and restricted cash	120,010	(29,783)	(70,161)
Cash, cash equivalents and restricted cash at beginning of period	219,571	249,354	319,515
Cash, cash equivalents and restricted cash at end of period	$ 339,581	$ 219,571	$ 249,354