Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Cash flows from operating activities:
Net income	$ 68,161	$ 34,780
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	47,794	46,324
Loss on disposition of fixed assets	1,858	806
Unrealized (gain) loss in value of equity securities	2,013	(848)
Deferred income taxes	(1,057)	(482)
Unrealized (gain) loss in SERP	383	(1,360)
Changes in operating assets and liabilities:
Inventories	1,351	14,413
Accounts receivable and prepaid expenses	4,365	10,762
Accounts payable and other liabilities	(6,302)	(29,423)
Income taxes	24,682	2,147
Other	(4,173)	487
Net cash provided by operating activities	139,075	77,606
Cash flows from investing activities:
Purchase of property and equipment	(49,731)	(44,335)
Proceeds from the sale of property and equipment	277	1,320
Purchase of marketable securities	(33,194)	(4,205)
Proceeds from the sale and maturities of marketable securities	2,675	2,785
Purchase of intangible assets	41	(540)
Change in SERP investment	(677)	(2,116)
Net cash used in investing activities	(80,609)	(47,091)
Cash flows from financing activities:
Dividends paid	(16,677)	(16,677)
Net cash used in financing activities	(16,677)	(16,677)
Net increase (decrease) in cash and cash equivalents	41,789	13,838
Cash and cash equivalents at beginning of year	66,871	37,808
Cash and cash equivalents at end of period	$ 108,660	$ 51,646