Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 21,439	$ 37,392
Marketable securities	82,501	89,348
Accounts receivable, net	53,842	52,410
Inventories	245,243	226,191
Prepaid expenses	10,132	8,995
Income taxes recoverable	0	1,226
Total current assets	413,157	415,562
Property and equipment, net	638,634	575,003
Goodwill	35,162	35,162
Intangible and other assets, net	3,487	3,277
Total assets	1,090,440	1,029,004
Liabilities
Accounts payable	126,258	132,092
Accrued expenses	27,193	31,298
Accrued self-insurance	18,544	18,103
Deferred revenue, net	6,635	6,197
Income taxes payable	1,359	0
Deferred income taxes	3,420	4,130
Total current liabilities	183,409	191,820
Postretirement benefit obligations	15,206	14,434
Deferred income taxes	89,109	73,081
Other	7,026	3,783
Total liabilities	294,750	283,118
Shareholders' Equity
Common stock, no par value, 100,800,000 shares authorized, 33,047,807 shares issued	9,949	9,949
Retained earnings	931,579	881,346
Accumulated other comprehensive income, net	5,019	5,448
Shareholders' equity before treasury stock	946,547	896,743
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	795,690	745,886
Total liabilities and shareholders' equity	$ 1,090,440	$ 1,029,004