CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income	$ 75,263	$ 83,305
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	83,909	81,533
(Gain) loss on disposition of fixed assets	(4,466)	5
Unrealized (gain) loss in value of equity securities	(1,038)	815
Deferred income taxes	(6,740)	4,476
Unrealized (gain) loss in SERP	(3,201)	(1,222)
Changes in operating assets and liabilities:
Inventories	(8,171)	(10,450)
Accounts receivable and prepaid expenses	(31,304)	(26,342)
Accounts payable and other liabilities	(4,546)	(89,437)
Income taxes	244	81
Other	374	359
Net cash provided by operating activities	100,324	43,125
Cash flows from investing activities:
Purchase of property and equipment	(107,932)	(75,645)
Proceeds from the sale of property and equipment	6,329	336
Purchase of marketable securities	(135,197)	(92,569)
Proceeds from the sale and maturities of marketable securities	130,967	58,725
Purchase of intangible assets	(419)	(29)
Change in SERP investment	(1,094)	(213)
Net cash used in investing activities	(107,347)	(109,394)
Cash flows from financing activities:
Dividends paid	(27,436)	(27,436)
Net cash used in financing activities	(27,436)	(27,436)
Net increase (decrease) in cash and cash equivalents	(34,459)	(93,706)
Cash and cash equivalents at beginning of year	184,217	157,997
Cash and cash equivalents at end of period	$ 149,757	$ 64,291