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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash provided by (used for) operations    
Net income $ 96,733 $ 302,600
Items in net income not using (providing) cash    
Depreciation and amortization, including deferred financing costs and other 31,853 20,993
Stock-based compensation 3,324 2,392
Pension expense 41 171
Deferred income taxes 3,393 (729)
Change in fair value of interest rate swaps 804 (2,066)
Other (518) (2,412)
Decrease (increase) in working capital    
Receivables (111,253) (218,018)
Inventories (41,247) (143,997)
Prepaid expenses and other (1,428) (3,227)
Accounts payable and accrued liabilities 36,181 147,425
Pension contributions (136) (655)
Income taxes payable 28,631 95,352
Other 1,614 1,116
Net cash provided by operations 47,992 198,945
Cash provided by (used for) investment    
Expenditures for property and equipment (30,063) (17,448)
Proceeds from sales of assets and other 565 2,581
Net cash used for investment (29,498) (14,867)
Cash provided by (used for) financing    
Dividends paid on common stock (8,258) (5,939)
Tax withholding payments on stock-based awards (5,926) (3,930)
Treasury stock purchased (1,482) 0
Other (451) (395)
Net cash used for financing (16,117) (10,264)
Net increase in cash and cash equivalents 2,377 173,814
Balance at beginning of the period 998,344 748,907
Balance at end of the period $ 1,000,721 $ 922,721