UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net earnings	$ 6,090	$ 2,808
Adjustments to reconcile net losses earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	5,013	5,053
Gains on sales of property	(491)	(83)
Provision for doubtful accounts	(5)	(1)
Stock-based compensation expense	195	185
Deferred income taxes	561	(829)
Net change in fair value contracts	(20)	(21)
Changes in assets and liabilities:
Accounts receivable	(74,660)	(11,268)
Accounts receivable/payable, affiliates	48	(13)
Inventories	(23,440)	(9,887)
Income tax receivable	1,284	1,650
Prepayments and other current assets	684	(657)
Accounts payable	91,211	36,127
Accrued liabilities	(775)	51
Other	178	(114)
Net cash provided by operating activities	5,873	23,001
Investing activities:
Property and equipment additions	(3,694)	(170)
Proceeds from property sales	856	1,005
Net cash (used in) provided by investing activities	(2,838)	835
Financing activities:
Principal repayments of finance lease obligations	(1,139)	(1,014)
Payment for financed portion of VEX acquisition	0	(2,500)
Dividends paid on common stock	(1,068)	(1,025)
Net cash used in financing activities	(2,207)	(4,539)
Increase in cash and cash equivalents, including restricted cash	828	19,297
Cash and cash equivalents, including restricted cash, at beginning of period	107,317	52,065
Cash and cash equivalents, including restricted cash, at end of period	$ 108,145	$ 71,362