Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013
Assets
Cash and cash equivalents	$ 26,915	$ 17,965
Marketable securities	74,572	71,845
Accounts receivable, net	62,306	57,193
Inventories	230,677	240,452
Prepaid expenses	18,350	17,293
Total current assets	412,820	404,748
Property and equipment, net	706,598	704,985
Goodwill	35,162	35,162
Intangible and other assets, net	3,314	3,347
Total assets	1,157,894	1,148,242
Liabilities
Accounts payable	131,970	133,568
Accrued expenses	30,619	27,416
Accrued self-insurance	21,181	19,333
Deferred revenue, net	4,239	7,056
Income taxes payable	5,640	1,628
Deferred income taxes	5,774	4,219
Total current liabilities	199,423	193,220
Postretirement benefit obligations	17,798	17,101
Deferred income taxes	95,711	97,934
Other	3,303	5,934
Total liabilities	316,235	314,189
Shareholders' Equity
Common stock, no par value, 100,800,000 shares authorized, 33,047,807 shares issued	9,949	9,949
Retained earnings	977,718	971,022
Accumulated other comprehensive income (Net of deferred taxes of $3,393 in 2014 and $2,753 in 2013)	4,849	3,939
Shareholders' equity before treasury stock	992,516	984,910
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	841,659	834,053
Total liabilities and shareholders' equity	$ 1,157,894	$ 1,148,242