Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current:
Cash and cash equivalents	$ 64,291	$ 157,997
Marketable securities	219,718	186,419
SERP investment	24,131	22,696
Accounts receivable, net	64,509	50,863
Inventories	303,724	293,274
Prepaid expenses and other current assets	42,617	29,921
Total current assets	718,989	741,170
Property and equipment, net	963,295	970,913
Operating lease right-to-use	181,355	175,952
Goodwill	52,330	52,330
Intangible and other assets, net	18,850	18,785
Total assets	1,934,819	1,959,150
Current:
Accounts payable	144,725	206,849
Accrued expenses	37,987	57,431
Operating leases	38,563	43,527
Accrued self-insurance	17,159	19,416
Deferred revenue, net	8,915	11,774
Income taxes payable	6,436	6,354
Total current liabilities	253,786	345,351
Postretirement benefit obligations	26,317	25,270
Accrued self-insurance	23,547	23,712
Operating leases	148,344	142,424
Deferred income taxes	115,938	111,225
Other	8,570	9,334
Total liabilities	576,503	657,316
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	1,505,060	1,449,191
Accumulated other comprehensive income (loss) (Net of deferred taxes of $2,105 in 2023 and $2,342 in 2022)	(5,836)	(6,449)
Shareholders' equity before treasury stock	1,509,173	1,452,691
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	1,358,316	1,301,834
Total liabilities and shareholders' equity	$ 1,934,819	$ 1,959,150