Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Assets
Cash and cash equivalents	$ 24,427	$ 21,439
Marketable securities	78,679	82,501
Accounts receivable, net	65,530	53,842
Inventories	241,561	245,243
Prepaid expenses	14,935	10,132
Total current assets	425,132	413,157
Property and equipment, net	654,866	638,634
Goodwill	35,162	35,162
Intangible and other assets, net	3,408	3,487
Total assets	1,118,568	1,090,440
Liabilities
Accounts payable	129,238	126,258
Accrued expenses	32,502	27,193
Accrued self-insurance	19,150	18,544
Deferred revenue, net	4,699	6,635
Income taxes payable	6,359	1,359
Deferred income taxes	5,949	3,420
Total current liabilities	197,897	183,409
Postretirement benefit obligations	15,992	15,206
Deferred income taxes	90,666	89,109
Other	5,683	7,026
Total liabilities	310,238	294,750
Shareholders' Equity
Common stock, no par value, 100,800,000 shares authorized, 33,047,807 shares issued	9,949	9,949
Retained earnings	943,638	931,579
Accumulated other comprehensive income (Net of deferred taxes of $3,912 in 2013 and $3,506 in 2012)	5,600	5,019
Shareholders' equity before treasury stock	959,187	946,547
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	808,330	795,690
Total liabilities and shareholders' equity	$ 1,118,568	$ 1,090,440