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Consolidated Statements of Income (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Net sales $ 102,110 $ 88,982 $ 284,152 $ 266,467
Cost of products sold 76,277 66,011 210,604 198,199
Gross profit 25,833 22,971 73,548 68,268
Selling, general and administrative expenses 14,291 13,228 42,420 40,951
Operating income 11,542 9,743 31,128 27,317
Other income (expense), net (486) (744) (1,846) (4,361)
Income before income taxes 11,056 8,999 29,282 22,956
Income taxes 2,274 1,738 5,974 4,575
Net income $ 8,782 $ 7,261 $ 23,308 $ 18,381
Earnings per share (in dollars per share) $ 0.34 $ 0.28 $ 0.89 $ 0.70
Cash dividends per share (in dollars per share) $ 0.155 $ 0.145 $ 0.465 $ 0.435
Average number of shares outstanding (in shares) 26,126,640 26,101,992 26,117,262 26,089,414