Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
Assets
Cash and cash equivalents	$ 28,224	$ 21,439
Marketable securities	73,689	82,501
Accounts receivable, net	54,124	53,842
Inventories	233,419	245,243
Prepaid expenses	18,340	10,132
Income taxes recoverable	4,624	0
Total current assets	412,420	413,157
Property and equipment, net	682,964	638,634
Goodwill	35,162	35,162
Intangible and other assets, net	3,190	3,487
Total assets	1,133,736	1,090,440
Liabilities
Accounts payable	130,448	126,258
Accrued expenses	30,340	27,193
Accrued self-insurance	19,345	18,544
Deferred revenue, net	4,455	6,635
Income taxes payable	0	1,359
Deferred income taxes	7,711	3,420
Total current liabilities	192,299	183,409
Postretirement benefit obligations	16,326	15,206
Deferred income taxes	93,160	89,109
Other	5,945	7,026
Total liabilities	307,730	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	963,370	931,579
Accumulated other comprehensive income (Net of deferred taxes of $2,478 in 2013 and $3,506 in 2012)	3,544	5,019
Shareholders' equity before treasury stock	976,863	946,547
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	826,006	795,690
Total liabilities and shareholders' equity	$ 1,133,736	$ 1,090,440