Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 34,323	$ 37,392
Marketable securities	83,318	89,348
Accounts receivable, net	52,287	52,410
Inventories	236,497	226,191
Prepaid expenses	9,312	8,995
Income taxes recoverable	39	1,226
Deferred income taxes	1,591	0
Total current assets	417,367	415,562
Property and equipment, net	617,848	575,003
Goodwill	35,162	35,162
Intangible and other assets, net	3,370	3,277
Deferred income taxes	17	0
Total assets	1,073,764	1,029,004
Liabilities
Accounts payable	127,963	132,092
Accrued expenses	25,539	31,298
Accrued self-insurance	18,953	18,103
Deferred revenue, net	4,141	6,197
Income taxes payable	12,257	0
Deferred income taxes	5,005	4,130
Total current liabilities	193,858	191,820
Postretirement benefit obligations	14,923	14,434
Deferred income taxes	76,242	73,081
Other	6,124	3,783
Total liabilities	291,147	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	917,545	881,346
Accumulated other comprehensive income (Net of deferred taxes of $4,183 in 2012 and $3,800 in 2011)	5,980	5,448
Shareholders' equity before treasury stock	933,474	896,743
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	782,617	745,886
Total liabilities and shareholders' equity	$ 1,073,764	$ 1,029,004