Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
OPERATING ACTIVITIES
Net income	$ 381,524	$ 192,106	$ 227,703
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of operating property and intangible assets	49,609	45,855	44,468
Non-cash interest charges	447	334	253
Provisions for losses on trade and other accounts receivable	5,722	9,415	9,831
Gains on sales/disposals of operating property	(1,830)	(2,576)	(1,016)
Impairment of intangible and other assets	0	2,582	0
Deferred income taxes, net	(3,790)	1,130	4,767
Stock-based compensation	27,537	4,639	4,236
Changes in operating assets and liabilities:
(Increase) decrease in trade and other accounts receivable	(362,234)	(285,169)	81,415
Decrease (increase) in other assets	4,444	(4,719)	(11,395)
Increase (decrease) in accounts payable	224,125	108,090	(42,138)
Increase (decrease) in other liabilities	43,422	28,496	(17,786)
(Decrease) increase in insurance claims	(92,236)	110,534	7,502
NET CASH PROVIDED BY OPERATING ACTIVITIES	276,740	210,717	307,840
INVESTING ACTIVITIES
Net change in other short-term investments	0	131	(131)
Sales and maturities of investments	31,938	22,632	62,922
Purchases of investments	(84,992)	(25,550)	(65,922)
Purchases of operating property	(23,261)	(30,626)	(19,416)
Proceeds from sales of operating property	2,971	7,760	3,991
Consideration paid for acquisition	0	(2,766)	0
NET CASH USED BY INVESTING ACTIVITIES	(73,344)	(28,419)	(18,556)
FINANCING ACTIVITIES
Increase (decrease) in cash overdraft	41,730	20,870	(1,461)
Dividends paid	(111,961)	(109,504)	(27,891)
Payment for debt issue costs	0	(1,132)	0
Proceeds from exercises of stock options	160	725	1,056
Taxes paid in lieu of shares issued related to stock-based compensation plans	(2,342)	(3,326)	(8,456)
Purchases of common stock	(122,722)	(115,962)	(88,578)
Principal payments on finance lease obligations	(37,644)	(43,703)	(44,635)
Purchase of noncontrolling interest	0	0	(600)
Payment of deferred consideration	(168)	0	0
NET CASH USED BY FINANCING ACTIVITIES	(232,947)	(252,032)	(170,565)
Effect of exchange rate changes on cash and cash equivalents	(232)	(427)	1,060
(Decrease) increase in cash, cash equivalents and and restricted cash	(29,783)	(70,161)	119,779
Cash, cash equivalents and restricted cash at beginning of period	249,354	319,515	199,736
Cash, cash equivalents and restricted cash at end of period	$ 219,571	$ 249,354	$ 319,515