Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014
Cash flows from operating activities:
Net income	$ 29,539	$ 27,564
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	30,622	28,409
Amortization	4,140	3,886
Gain on disposition of fixed assets	(271)	(1,807)
Gain on sale of marketable securities	(15)	(46)
Deferred income taxes	(7,469)	(3,887)
Changes in operating assets and liabilities:
Inventories	8,680	21,521
Accounts receivable and prepaid expenses	4,314	(8,840)
Income taxes recoverable	612	0
Accounts payable and other liabilities	(13,512)	(11,246)
Income taxes payable	6,836	(45)
Other	442	214
Net cash provided by operating activities	63,918	55,723
Cash flows from investing activities:
Purchase of property and equipment	(38,979)	(35,806)
Proceeds from the sale of property and equipment	1,285	2,158
Purchase of marketable securities	(13,512)	(3,213)
Proceeds from maturities of marketable securities	600	1,750
Proceeds from the sale of marketable securities	6,553	1,216
Purchase of intangible assets	(1,446)	(412)
Change in SERP investment	(1,388)	(1,516)
Net cash used in investing activities	(46,887)	(35,823)
Cash flows from financing activities:
Dividends paid	(16,139)	(16,139)
Net cash used in financing activities	(16,139)	(16,139)
Net increase in cash and cash equivalents	892	3,761
Cash and cash equivalents at beginning of year	22,986	17,965
Cash and cash equivalents at end of period	$ 23,878	$ 21,726