Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash provided by (used for) operations
Net income	$ 483,656	$ 857,658	$ 712,486
Items in net income not using (providing) cash
Depreciation and amortization, including deferred financing costs and other	135,414	103,879	82,489
Stock-based compensation	15,410	11,870	7,911
Pension expense	163	294	76
Deferred income taxes	(180)	59,666	(13,704)
Change in fair value of interest rate swaps	1,791	(3,559)	(1,745)
Other	(1,898)	(1,043)	712
Decrease (increase) in working capital, net of acquisitions
Receivables	(35,024)	158,073	(71,190)
Inventories	22,286	(13,903)	(158,472)
Prepaid expenses and other	(824)	(2,834)	(3,238)
Accounts payable and accrued liabilities	37,146	(100,354)	123,670
Pension contributions	(553)	(1,058)	(470)
Income taxes payable	28,590	(30,561)	(10,057)
Other	1,481	3,091	(1,484)
Net cash provided by operations	687,458	1,041,219	666,984
Cash provided by (used for) investment
Expenditures for property and equipment	(215,438)	(114,117)	(106,518)
Acquisitions of businesses and facilities, net of cash acquired	(162,774)	(515,237)	0
Proceeds from sales of assets and other	2,660	3,898	932
Net cash used for investment	(375,552)	(625,456)	(105,586)
Cash provided by (used for) financing
Borrowings of long-term debt, including revolving credit facility	0	0	28,000
Payments of long-term debt, including revolving credit facility	0	0	(28,000)
Dividends paid on common stock	(346,493)	(159,564)	(213,681)
Tax withholding payments on stock-based awards	(5,926)	(3,930)	(2,729)
Treasury stock purchased	(6,426)	0	0
Payments of deferred financing costs	0	(1,174)	0
Other	(1,831)	(1,658)	(1,463)
Net cash used for financing	(360,676)	(166,326)	(217,873)
Net increase (decrease) in cash and cash equivalents	(48,770)	249,437	343,525
Balance at beginning of the period	998,344	748,907	405,382
Balance at end of the period	$ 949,574	$ 998,344	$ 748,907