Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016
Cash flows from operating activities:
Net income	$ 30,311	$ 35,393
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	42,160	36,987
Gain (loss) on disposition of fixed assets	(1,034)	58
Gain on sale of marketable securities	0	(269)
Deferred income taxes	5,757	(4,775)
Changes in operating assets and liabilities:
Inventories	9,706	5,601
Accounts receivable and prepaid expenses	21,429	19,745
Accounts payable and other liabilities	(40,409)	(25,187)
Income taxes	910	6,072
Other	490	729
Net cash provided by operating activities	69,320	74,354
Cash flows from investing activities:
Purchase of property and equipment	(40,334)	(54,474)
Proceeds from the sale of property and equipment	2,106	146
Purchase of marketable securities	(6,788)	(1,284)
Proceeds from maturities of marketable securities	5,802	835
Proceeds from the sale of marketable securities	4,806	15,213
Purchase of intangible assets	(1,267)	(728)
Change in SERP investment	(2,052)	(1,264)
Net cash used in investing activities	(37,727)	(41,556)
Cash flows from financing activities:
Payments on long-term debt	(12,525)	0
Dividends paid	(16,139)	(16,139)
Net cash used in financing activities	(28,664)	(16,139)
Net increase in cash and cash equivalents	2,929	16,659
Cash and cash equivalents at beginning of year	14,653	17,596
Cash and cash equivalents at end of period	$ 17,582	$ 34,255