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Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 111,827	$ 97,872	$ 208,431	$ 190,475
Cost of products sold	81,962	70,627	152,360	140,978
Gross profit	29,865	27,245	56,071	49,497
Selling, general and administrative expenses	14,872	14,084	29,228	27,678
Operating income	14,993	13,161	26,843	21,819
Other income (expense), net	(2,407)	(1,354)	(1,601)	(2,692)
Income before income taxes	12,586	11,807	25,242	19,127
Income taxes	2,413	3,959	5,452	6,214
Net income	$ 10,173	$ 7,848	$ 19,790	$ 12,913
Earnings per share (in dollars per share)	$ 0.39	$ 0.30	$ 0.76	$ 0.49
Cash dividends per share (in dollars per share)	$ 0.125	$ 0.115	$ 0.25	$ 0.23
Average number of shares outstanding (in shares)	26,107,670	26,096,881	26,107,149	26,095,013

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