Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020
Cash flows from operating activities:
Net income	$ 57,727	$ 68,161
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,270	47,794
(Gain) loss on disposition of fixed assets	402	1,858
Unrealized (gain) loss in value of equity securities	82	2,013
Deferred income taxes	3,911	(1,057)
Unrealized (gain) loss in SERP	(1,768)	383
Changes in operating assets and liabilities:
Inventories	6,064	1,351
Accounts receivable and prepaid expenses	17,525	4,365
Accounts payable and other liabilities	(43,899)	(6,302)
Income taxes	8,225	24,682
Other	305	(4,173)
Net cash provided by operating activities	99,844	139,075
Cash flows from investing activities:
Purchase of property and equipment	(77,750)	(49,731)
Proceeds from the sale of property and equipment	5,745	277
Purchase of marketable securities	(13,385)	(33,194)
Proceeds from the sale and maturities of marketable securities	8,630	2,675
Purchase of intangible assets	(17)	41
Change in SERP investment	(1,797)	(677)
Net cash used in investing activities	(78,574)	(80,609)
Cash flows from financing activities:
Dividends paid	(16,677)	(16,677)
Net cash used in financing activities	(16,677)	(16,677)
Net increase in cash and cash equivalents	4,593	41,789
Cash and cash equivalents at beginning of year	136,612	66,871
Cash and cash equivalents at end of period	$ 141,205	$ 108,660