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Consolidated Statements Of Income - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Income Statement [Abstract]        
Net sales $ 696,049 $ 622,207 $ 2,082,240 $ 1,779,543
Cost of goods sold 547,742 483,986 1,621,294 1,338,570
Gross profit 148,307 138,221 460,946 440,973
Selling, general, and administrative expenses 35,192 39,729 109,303 111,379
Research, development, and testing expenses 34,388 35,387 106,035 107,241
Operating profit 78,727 63,105 245,608 222,353
Interest and financing expenses, net 8,369 9,345 24,859 24,557
Loss on early extinguishment of debt 0 0 7,545 0
Other income (expense), net 9,971 7,393 26,240 19,785
Income before income tax expense 80,329 61,153 239,444 217,581
Income tax expense 17,103 9,115 50,428 43,879
Net income $ 63,226 $ 52,038 $ 189,016 $ 173,702
Earnings per share - basic (in dollars per share) $ 6.32 $ 4.80 $ 18.60 $ 15.94
Earnings per share - diluted (in dollars per share) 6.32 4.80 18.60 15.94
Cash dividends declared per share (in dollars per share) $ 2.10 $ 2.10 $ 6.30 $ 5.90