Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities
Net income (loss) from continuing operations	$ (59,117)	$ 6,504
Loss from discontinued operations, net of income taxes	0	(554)
Net income (loss)	(59,117)	5,950
Adjustments to reconcile net income (loss) to cash used in operating activities:
Depreciation and amortization	32,220	34,377
Bad debt expense, net	0	1,255
Stock-based compensation expense	2,596	1,818
Deferred federal income tax	(8,051)	(6,947)
Asset impairment	87,156	0
Other	3,225	3,048
Changes in operating assets and liabilities:
Accounts receivable	125,113	(215,012)
Inventories	178,010	(136,820)
Commodity derivatives	83,148	(277,761)
Other current and non-current assets	(17,543)	(38,810)
Payables and other current and non-current liabilities	(760,292)	(446,096)
Net cash used in operating activities	(333,535)	(1,074,998)
Investing Activities
Purchases of property, plant and equipment and capitalized software	(25,470)	(20,722)
Purchases of investments	0	(1,333)
Purchases of Rail assets	0	(3,186)
Proceeds from sale of Rail assets	2,871	248
Other	2,792	72
Net cash used in investing activities	(19,807)	(24,921)
Financing Activities
Net receipts under short-term lines of credit	363,619	796,209
Proceeds from issuance of short-term debt	0	350,000
Payments of short-term debt	0	(200,000)
Payments of long-term debt	(30,251)	(7,566)
Contributions from noncontrolling interest owner	0	2,450
Distributions to noncontrolling interest owner	(9,980)	(9,980)
Payments of debt issuance costs	(5)	(7,310)
Dividends paid	(6,279)	(6,144)
Proceeds from exercises of stock options	0	5,024
Common stock repurchased	(1,671)	0
Value of shares withheld for taxes	(6,616)	(3,319)
Other	0	393
Net cash provided by financing activities	308,817	919,757
Effect of exchange rates on cash and cash equivalents	109	99
Decrease in cash and cash equivalents	(44,416)	(180,063)
Cash and cash equivalents at beginning of period	115,269	216,444
Cash and cash equivalents at end of period	$ 70,853	$ 36,381