Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Assets
Cash and cash equivalents	$ 22,986	$ 17,965
Marketable securities	73,959	63,093
SERP investment	9,121	8,752
Accounts receivable, net	70,642	57,193
Inventories	239,641	240,452
Prepaid expenses and other current assets	17,432	17,293
Income taxes recoverable	612	0
Total current assets	434,393	404,748
Property and equipment, net	716,860	704,985
Goodwill	35,162	35,162
Intangible and other assets, net	4,704	3,347
Total assets	1,191,119	1,148,242
Liabilities
Accounts payable	144,812	133,568
Accrued expenses	34,590	27,416
Accrued self-insurance	18,695	19,333
Deferred revenue, net	6,720	7,056
Income taxes payable	0	1,628
Deferred income taxes	5,800	4,219
Total current liabilities	210,617	193,220
Postretirement benefit obligations	18,672	17,101
Deferred income taxes	100,756	97,934
Other	3,242	5,934
Total liabilities	333,287	314,189
Shareholders' Equity
Common stock, no par value, 100,800,000 shares authorized, 33,047,807 shares issued, 26,898,443 shares outstanding	9,949	9,949
Retained earnings	993,911	971,022
Accumulated other comprehensive income, net	4,829	3,939
Shareholders' equity before treasury stock	1,008,689	984,910
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	857,832	834,053
Total liabilities and shareholders' equity	$ 1,191,119	$ 1,148,242