CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities:
Net earnings	$ 3,487	$ 11,888	$ 995
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	22,707	19,797	18,573
Gains on sales of property	(2,512)	(733)	(1,859)
Provision for doubtful accounts	(20)	(6)	(27)
Stock-based compensation expense	1,022	854	643
Deferred income taxes	(2,136)	(1,401)	6,389
Net change in fair value contracts	353	(14)	(9)
Changes in assets and liabilities:
Accounts receivable	(46,577)	(37,984)	(5,162)
Accounts receivable/payable, affiliates	33	(2)	(5)
Inventories	(7,334)	394	4,751
Income tax receivable	6,424	6,864	(10,719)
Prepayments and other current assets	(592)	575	(1,401)
Accounts payable	34,762	82,170	(61,116)
Accrued liabilities	4,327	(692)	5,052
Other	(167)	(684)	(104)
Net cash provided by (used in) operating activities	13,777	81,026	(43,999)
Investing activities:
Property and equipment additions	(7,491)	(12,382)	(5,008)
Acquisition of Firebird and Phoenix, net of cash acquired	(33,147)	0	0
Asset acquisitions	0	0	(20,200)
Proceeds from property sales	3,102	2,286	4,515
Insurance and state collateral refunds	1,533	0	1,030
Net cash used in investing activities	(36,003)	(10,096)	(19,663)
Financing activities:
Borrowings under Credit Agreement	117,000	8,000	0
Repayments under Credit Agreement	(92,625)	(8,000)	0
Principal repayments of finance lease obligations	(4,741)	(4,367)	(2,336)
Cash paid for debt issuance costs	(1,679)	0	0
Payment for financed portion of VEX acquisition	0	(10,000)	0
Repurchase of common shares from KSA	(69,928)	0	0
Net proceeds from sale of equity	1,724	2,830	0
Payment of contingent consideration liability	0	0	(111)
Dividends paid on common stock	(3,775)	(4,141)	(4,081)
Net cash used in financing activities	(54,024)	(15,678)	(6,528)
(Decrease) Increase in cash and cash equivalents, including restricted cash	(76,250)	55,252	(70,190)
Cash and cash equivalents, including restricted cash, at beginning of period	107,317	52,065	122,255
Cash and cash equivalents, including restricted cash, at end of period	$ 31,067	$ 107,317	$ 52,065