Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Dec. 27, 2014
Assets
Cash and cash equivalents	$ 17,112	$ 22,986
Marketable securities	80,480	73,959
SERP investment	9,994	9,121
Accounts receivable, net	66,086	70,642
Inventories	236,548	239,641
Prepaid expenses and other current assets	17,423	17,432
Income taxes recoverable	0	612
Total current assets	427,643	434,393
Property and equipment, net	719,158	716,860
Goodwill	35,162	35,162
Intangible and other assets, net	5,300	4,704
Total assets	1,187,263	1,191,119
Liabilities
Accounts payable	137,319	144,812
Accrued expenses	30,875	34,590
Accrued self-insurance	19,597	18,695
Deferred revenue, net	4,628	6,720
Income taxes payable	5,666	0
Deferred income taxes	5,235	5,800
Total current liabilities	203,320	210,617
Postretirement benefit obligations	19,073	18,672
Deferred income taxes	97,451	100,756
Other	4,533	3,242
Total liabilities	324,377	333,287
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	998,950	993,911
Accumulated other comprehensive income (Net of deferred taxes of $3,381 in 2015 and $3,371 in 2014)	4,844	4,829
Shareholders' equity before treasury stock	1,013,743	1,008,689
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	862,886	857,832
Total liabilities and shareholders' equity	$ 1,187,263	$ 1,191,119