Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 1,123	$ 3,084
Receivables (less allowance for doubtful accounts: March 31, 2018 - $24; December 31, 2017 - $24)	34,532	34,347
Inventory	98,876	93,149
Prepaid expenses	3,187	2,182
Refundable income taxes	932	1,980
Total current assets	138,650	134,742
Property and equipment	271,097	267,288
Less accumulated depreciation and amortization	(167,095)	(164,237)
Property and equipment, net	104,002	103,051
Other assets	2,559	2,535
Total assets	245,211	240,328
Current Liabilities
Current maturities of long-term debt	375	372
Accounts payable	24,630	30,037
Accrued expenses	7,161	11,171
Total current liabilities	32,166	41,580
Long-term debt, less current maturities	21,316	21,407
Revolving credit facility	10,544	2,775
Deferred credits	1,934	2,151
Accrued retirement, health and life insurance benefits	3,030	3,133
Other noncurrent liabilities	542	540
Deferred income taxes	291	12
Total liabilities	69,823	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 March 31, 2018 and December 31, 2017, and 16,844,596 and 16,797,420 shares outstanding at March 31, 2018 and December 31, 2017, respectively	6,715	6,715
Additional paid-in capital	13,983	13,912
Retained earnings	174,682	167,129
Accumulated other comprehensive loss	(324)	(311)
Treasury stock, at cost
Shares of 1,271,369 at March 31, 2018 and 1,318,545 at December 31, 2017	(19,672)	(18,719)
Total stockholders’ equity	175,388	168,730
Total liabilities and stockholders’ equity	$ 245,211	$ 240,328