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Consolidated Statements of Income (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Sales    
Products $ 143,597 $ 123,883
Services 26,682 18,321
Total Sales 170,279 142,204
Cost of sales    
Products 76,659 64,073
Services 19,905 12,337
Total Cost of Sales 96,564 76,410
Gross Profit 73,715 65,794
Selling, general and administrative expenses 34,767 30,785
Research and development expenses 31,916 29,488
Operating Income 7,032 5,521
Interest and dividend income 933 855
Interest expense (141) (145)
Net realized investment gain 470 1,728
Other income, net 51 119
Income before provision for income taxes 8,345 8,078
Provision for income taxes (1,694) (3,064)
Net Income $ 6,651 $ 5,014
Weighted average shares outstanding – basic 48,430 49,220
Weighted average shares outstanding – diluted 48,939 49,389
Earnings per common share – basic $ 0.14 $ 0.10
Earnings per common share – diluted 0.14 0.10
Dividend per share $ 0.09 $ 0.09