Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current:
Cash and cash equivalents	$ 20,154	$ 14,653
Marketable securities	63,921	67,171
SERP investment	13,607	11,154
Accounts receivable, net	71,629	96,170
Inventories	268,170	276,783
Prepaid expenses and other current assets	20,134	16,310
Income taxes recoverable	1,748	1,625
Total current assets	459,363	483,866
Property and equipment, net	874,777	878,195
Goodwill	52,330	52,330
Intangible and other assets, net	19,478	16,913
Total assets	1,405,948	1,431,304
Current:
Accounts payable	186,580	199,159
Accrued expenses	34,744	50,947
Accrued self-insurance	14,121	19,330
Deferred revenue, net	4,931	6,730
Total current liabilities	240,376	276,166
Long-term debt	52,086	64,476
Postretirement benefit obligations	16,343	15,277
Accrued self-insurance	21,671	21,353
Deferred income taxes	128,377	119,445
Other	9,671	7,865
Total liabilities	468,524	504,582
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	1,073,330	1,062,778
Accumulated other comprehensive income (Net of deferred taxes of $3,452 in 2017 and $3,382 in 2016)	5,002	4,852
Shareholders' equity before treasury stock	1,088,281	1,077,579
Treasury stock at cost, 6,149,364 shares	(150,857)	(150,857)
Total shareholders' equity	937,424	926,722
Total liabilities and shareholders' equity	$ 1,405,948	$ 1,431,304

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.