Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 0	$ 3,084
Receivables (less allowance for doubtful accounts: September 30, 2018 and December 31, 2017 - $24)	49,991	34,347
Inventory	107,346	93,149
Prepaid expenses	1,885	2,182
Refundable income taxes	2,011	1,980
Total current assets	161,233	134,742
Property and equipment	282,271	267,288
Less accumulated depreciation and amortization	(172,344)	(164,237)
Property and equipment, net	109,927	103,051
Other assets	2,420	2,535
Total assets	273,580	240,328
Current Liabilities
Current maturities of long-term debt	382	372
Accounts payable	22,905	30,037
Accrued expenses	8,545	11,171
Total current liabilities	31,832	41,580
Long-term debt, less current maturities	21,133	21,407
Credit agreement - revolver	23,605	2,775
Deferred credits	1,687	2,151
Accrued retirement, health and life insurance benefits	2,913	3,133
Other noncurrent liabilities	1,112	540
Deferred income taxes	936	12
Total liabilities	83,218	71,598
Contingencies
Capital stock
Preferred, 5% non-cumulative; $10 par value; authorized 1,000 shares; issued and outstanding 437 shares	4	4
Common stock
No par value; authorized 40,000,000 shares; issued 18,115,965 shares at September 30, 2018 and December 31, 2017, and 16,851,916 and 16,797,420 shares outstanding at September 30, 2018 and December 31, 2017, respectively	6,715	6,715
Additional paid-in capital	14,888	13,912
Retained earnings	188,469	167,129
Accumulated other comprehensive loss	(269)	(311)
Treasury stock, at cost
Shares of 1,264,049 at September 30, 2018 and 1,318,545 at December 31, 2017	(19,445)	(18,719)
Total stockholders’ equity	190,362	168,730
Total liabilities and stockholders’ equity	$ 273,580	$ 240,328