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Consolidated Statements of Income (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Net sales $ 93,015 $ 85,814 $ 182,042 $ 177,485
Cost of products sold 68,342 63,965 134,326 132,188
Gross profit 24,673 21,849 47,716 45,297
Selling, general and administrative expenses 14,059 12,852 28,129 27,723
Operating income 10,614 8,997 19,587 17,574
Other income (expense), net (1,705) (1,930) (1,360) (3,617)
Income before income taxes 8,909 7,067 18,227 13,957
Income taxes 1,812 1,433 3,701 2,837
Net income $ 7,097 $ 5,634 $ 14,526 $ 11,120
Earnings per share (in dollars per share) $ 0.27 $ 0.22 $ 0.56 $ 0.43
Cash dividends per share (in dollars per share) $ 0.155 $ 0.145 $ 0.310 $ 0.290
Average number of shares outstanding (in shares) 26,116,140 26,091,492 26,112,495 26,083,056