Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Income (loss) before income taxes from continuing operations	$ 132,529	$ 154,954	$ 131,542
Income from discontinued operations, net of income taxes	0	12,025	4,324
Net income	132,529	166,979	135,866
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation and amortization	125,106	134,742	178,934
Bad debt expense, net	11,519	6,001	237
Stock-based compensation expense	12,857	11,192	11,038
Deferred federal income tax	(1,596)	(20,009)	(104,618)
Gain on sale of business from continuing operations	(5,643)	0	(14,619)
Asset impairment	87,156	11,818	8,947
(Gain) loss on sale of business from discontinued operations	0	(27,091)	1,491
Damaged inventory	0	17,328	0
Other	(10,698)	14,073	(481)
Changes in operating assets and liabilities:
Accounts and notes receivable	468,968	(391,403)	(184,002)
Inventories	572,235	56,859	(528,073)
Commodity derivatives	111,506	65,399	(107,188)
Other current and non-current assets	6,529	10,936	(116,403)
Payables and other current and non-current liabilities	(563,718)	230,293	667,821
Net cash provided by (used in) operating activities	946,750	287,117	(51,050)
Investing Activities
Acquisition of businesses, net of cash acquired	(24,698)	(20,245)	(11,425)
Purchases of property, plant and equipment and capitalized software	(150,443)	(108,284)	(75,766)
Proceeds from sale of assets	3,506	5,307	4,508
Purchase of investments	(1,730)	(2,105)	(6,243)
Proceeds from sale of business from continuing operations	10,318	5,171	18,130
Proceeds from sale of Rail assets	2,871	36,706	19,150
Proceeds from sale of business from discontinued operations	0	56,302	543,102
Purchases of Rail assets	0	(31,458)	(6,039)
Other	6,297	5,704	1,831
Net cash (used in) provided by investing activities	(153,879)	(52,902)	487,248
Financing Activities
Net (payments) receipts under short-term lines of credit	(233,696)	(21,273)	(105,895)
Proceeds from issuance of short-term debt	0	350,000	608,250
Payments of short-term debt	0	(550,000)	(408,250)
Proceeds from issuance of long-term debt	100,000	0	203,000
Payments of long-term debt	(49,620)	(30,045)	(530,733)
Distributions to noncontrolling interest owner	(46,418)	(44,910)	(25)
Dividends paid	(25,373)	(24,609)	(23,746)
Common stock repurchased	(1,747)	(12,721)	0
Other	(7,139)	(1,172)	8,630
Net cash used in financing activities	(263,993)	(334,730)	(248,769)
Effect of exchange rates on cash and cash equivalents	(293)	(660)	(108)
Increase (decrease) in Cash and cash equivalents	528,585	(101,175)	187,321
Cash and cash equivalents at beginning of year	115,269	216,444	29,123
Cash and cash equivalents at end of year	$ 643,854	$ 115,269	$ 216,444