Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Cash flows from operating activities:
Net income	$ 108,849	$ 118,917	$ 67,983
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	102,804	99,370	93,706
(Gain) loss on disposition of fixed assets	1,026	3,914	782
(Gain) on sale of marketable securities	0		(51)
Unrealized (gain) loss in value of equity securities	900	1,791	(1,975)
Deferred income taxes	12,313	5,657	5,765
Unrealized (gain) loss in SERP	(2,309)	(2,641)	(135)
Changes in operating assets and liabilities:
Inventories	(563)	10,782	950
Accounts receivable and prepaid expenses	2,727	(6,804)	2,431
Accounts payable and other liabilities	174	54,658	(505)
Income taxes	2,302	(3,139)	913
Other	(514)	(4,515)	1,822
Net cash provided by operating activities	227,709	277,990	171,686
Cash flows from investing activities:
Purchase of property and equipment	(151,800)	(130,991)	(101,456)
Proceeds from the sale of property and equipment	5,932	470	4,245
Purchase of marketable securities	(116,268)	(50,789)	(13,620)
Proceeds from the sale and maturities of marketable securities	19,680	7,730	7,165
Purchase of intangible assets	(208)	(127)	(1,489)
Change in SERP investment	(1,986)	(1,188)	(4,114)
Net cash used in investing activities	(244,650)	(174,895)	(109,269)
Cash flows from financing activities:
Dividends paid	(33,623)	(33,354)	(33,354)
Net cash used in financing activities	(33,623)	(33,354)	(33,354)
Net increase (decrease) in cash and cash equivalents	(50,564)	69,741	29,063
Cash and cash equivalents at beginning of year	136,612	66,871	37,808
Cash and cash equivalents at end of period	$ 86,048	$ 136,612	$ 66,871