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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash provided by (used for) operations      
Net Income $ 712,486 $ 174,979 $ 80,925
Items in net income not using (providing) cash      
Depreciation and amortization, including deferred financing costs and other 82,489 97,131 82,377
Stock-based compensation 7,911 7,820 7,973
Pension expense 76 8,125 3,121
Deferred income taxes (13,704) 27,497 9,025
Change in fair value of interest rate swaps (1,745) 2,426 2,963
Loss on curtailment of facility (excluding severance) 0 1,476 0
Other 712 169 (353)
Loss on Extinguishment of Debt 0 13,968 0
Decrease (increase) in working capital, net of acquisitions      
Receivables (71,190) (159,906) 2,160
Inventories (158,472) (6,249) 40,176
Prepaid expenses and other (3,238) (1,133) (132)
Accounts payable and accrued liabilities 123,670 131,541 5,212
Pension contributions (470) (12,759) (5,238)
Income taxes payable (10,057) 9,022 19,387
Other (1,484) 409 (1,949)
Net cash provided by operations 666,984 294,516 245,647
Cash provided by (used for) investment      
Expenditures for property and equipment (106,518) (79,429) (82,720)
Acquisitions of businesses and facilities 0 0 (15,676)
Proceeds from sale of facilities 0 0 2,493
Proceeds from sales of assets and other 932 713 1,838
Net cash used for investment (105,586) (78,716) (94,065)
Cash provided by (used for) financing      
Borrowings of long-term debt, including revolving credit facility 28,000 400,000 5,500
Payments of long-term debt, including revolving credit facility (28,000) (405,774) (5,500)
Dividends paid on common stock (213,681) (79,195) (53,954)
Tax withholding payments for stock-based awards (2,729) (3,309) (3,574)
Payments of deferred financing costs 0 (6,222) 0
Other (1,463) (1,155) (488)
Net cash used for financing (217,873) (95,655) (58,016)
Net increase in cash and cash equivalents 343,525 120,145 93,566
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 748,907 405,382 285,237
Balance at beginning of the period 405,382 285,237 191,671
Balance at end of the period $ 748,907 $ 405,382 $ 285,237